release: v0.2.4 里程碑快照（孤儿提交，无父；树 = dev 68362e5）

本批内容见 CHANGELOG.md 的 0.2.4 段。按 D41 用孤儿快照推 main，保留「公开史只有里程碑」的模型。

crates/i18n/src/bridge.rs

@@ -0,0 +1,184 @@
+//! 文案边界（示例契约）：core / presenter 的**状态**怎么进 UI。
+//!
+//! ## 现状（为什么需要这份契约）
+//!
+//! UI 文案硬编码英文，而 `core` / `presenter` 产出的状态串是中文，于是界面上已经出现
+//! `Launch failed · exit0 静默失败` 这种**一句话里中英混排**的东西，加载器徽标也在 `原版` / `Fabric`
+//! 之间混用。根因不是「译文不够」，是**边界没划**：谁产出文案、谁负责翻译，没有规则。
+//!
+//! ## 三条规则
+//!
+//! **R1 · UI 侧不产生文案，只翻译 key。**
+//!    UI 不许把片段拼成句子（`"Launch failed · " + reason`），也不许写中文字面量。
+//!    一句话 = 一个 key（[`crate::catalog`]），带变量的用 `{name}` 交给
+//!    [`crate::catalog::Catalog::render`]。拼接一旦发生，任何一套语言都拼不对（语序、标点、
+//!    量词都不一样），而且混排会立刻出现在截图里。
+//!
+//! **R2 · core 的中文串不进 UI。**
+//!    core / presenter 的中文（`原版`、`静默失败（exit 0 但游戏没起来）`、
+//!    `缺少库文件 foo.jar（…）`）是**日志 / CLI / 诊断报告**的文案，不是界面文案。
+//!    界面只能通过两条合法通道拿到「要显示什么」：
+//!    1. **结构化出口**（首选）：枚举 / DTO 字段 → 映射到 [`crate::Key`]。
+//!       例：`presenter::dto::LoaderKind::as_str()` 的稳定 id（`vanilla` / `fabric`）→
+//!       [`crate::Key::LoaderVanilla`]；`LogOutcome` 三态 → `LaunchOutcome*` 三 key。
+//!       好处是**新增一个枚举变体时编译器会逼你补映射**（`match` 非穷尽即报错）。
+//!    2. **过渡表**（[`classify`]）：只覆盖「已知会漏到界面的少数几个串」，逐条硬编码。
+//!       它是**债**，不是终点——新出现的未知串一律走第三条。
+//!
+//! **R3 · 认不出的串，不许画原文。**
+//!    [`CoreText::Untranslated`] 就是那种情况：UI 只许显示 [`crate::Key::CoreTextUntranslated`]
+//!    这个**故意难看**的兜底（`[system text not translated]`），并把原文写进日志。
+//!    这条比「先画上去以后再翻」严格，是因为后者永远不会被回头修——难看才会被修。
+//!    同时它是一件**上游缺陷的证据**：说明 core 欠一个结构化出口，应当报 finding 而不是在 UI 贴创可贴。
+//!
+//! ## 品牌专名（唯一的豁免）
+//!
+//! `Fabric` / `Forge` / `NeoForge` / `Quilt` / `OptiFine` / `LiteLoader` 是专有名词，**不翻译**
+//! （翻成「锻造」就没人认识了）。它们可以原样显示，但必须经 [`CoreText::Brand`] 判定——
+//! 也就是说「原样显示」是一个**显式决定**，不是「反正没译文就画原文」的默认行为。
+//!
+//! ## 诚实边界（抓得住什么 / 抓不住什么）
+//!
+//! - **抓得住**：本表里列到的串（映射正确、未知串不被放行）；
+//! - **抓不住**：core 明天新加一句中文——本 crate 不依赖 core（零依赖纪律），没有跨 crate 的一致性检查。
+//!   那条只能靠「core 侧只给枚举」的纪律 + 后续在 `crates/presenter` 里加一条守门测试
+//!   （例如：`*_view` 的字符串字段不许含 CJK 字符）。
+
+use crate::catalog::Key;
+
+/// 一段来自 `core` / `presenter` 的显示文本该怎么处理。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum CoreText {
+    /// 品牌专名：原样显示（不翻译，见模块文档的豁免）。
+    Brand(&'static str),
+    /// 有对应 key：按当前语言取词。
+    Key(Key),
+    /// 不认识：只许显示 [`Key::CoreTextUntranslated`]，原文进日志。
+    Untranslated,
+}
+
+/// 已知会漏到界面的中文状态串 → key。
+///
+/// 每一条都得在 `crates/presenter` / `crates/core` 里找得到出处（注释里给位置），
+/// 不许凭想象加——凭空加的条目会让 [`classify`] 假装覆盖了实际没覆盖的东西。
+const LEGACY_STATUS: &[(&str, Key)] = &[
+    // `presenter::dto::instances::LoaderKind::label()`（全仓唯一那份显示词表）
+    ("原版", Key::LoaderVanilla),
+    // `presenter::host::job.rs`：`LogOutcome::SilentFail` 的展示文字
+    ("静默失败（exit 0 但游戏没起来）", Key::LaunchOutcomeSilent),
+    // `presenter::mock_data.rs` 里的演示数据
+    ("exit0 静默失败", Key::LaunchOutcomeSilent),
+];
+
+/// 品牌专名（原样显示；**不得**翻译或拼进句子，UI 拼装仍然禁止）。
+const BRANDS: &[&str] = &[
+    "Fabric",
+    "Forge",
+    "NeoForge",
+    "Quilt",
+    "OptiFine",
+    "LiteLoader",
+];
+
+/// 契约总入口：core / presenter 的显示文本 → 该画什么。
+///
+/// 这是**示例契约**：形状（三分类 + 未知不放行）比表里的具体条目重要，接线 mission 按这个形状
+/// 把每条 UI 路径改过来，条目随上游结构化出口的落地逐条删掉。
+#[must_use]
+pub fn classify(text: &str) -> CoreText {
+    let trimmed = text.trim();
+    if trimmed.is_empty() {
+        return CoreText::Untranslated;
+    }
+
+    if let Some((_, key)) = LEGACY_STATUS.iter().find(|(legacy, _)| *legacy == trimmed) {
+        return CoreText::Key(*key);
+    }
+
+    if let Some(brand) = BRANDS.iter().find(|brand| **brand == trimmed) {
+        return CoreText::Brand(brand);
+    }
+
+    // `Fabric 0.16.5` 这类「品牌 + 版本号」也是合法显示：品牌之后只跟一个版本号时放行。
+    // 注意这里是**保守**放行：只有「一个词 + 空格 + 版本号」的形状才算，含中文的串绝不会进来。
+    if let Some((head, tail)) = trimmed.split_once(' ') {
+        if let Some(brand) = BRANDS.iter().find(|brand| **brand == head) {
+            if !tail.is_empty() && !tail.contains(char::is_whitespace) && !tail.chars().any(is_cjk)
+            {
+                return CoreText::Brand(brand);
+            }
+        }
+    }
+
+    CoreText::Untranslated
+}
+
+/// 是否 CJK 字符（`classify` 的保守放行判据用）。
+fn is_cjk(ch: char) -> bool {
+    // 0x2E80..=0x9FFF 已含 CJK 部首 / 假名 / 统一表意文字与 0x3000 段的中文标点，不再单列。
+    matches!(ch as u32, 0x2E80..=0x9FFF | 0xF900..=0xFAFF | 0xFF00..=0xFFEF)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn known_chinese_status_strings_map_to_keys() {
+        // 抓得住：过渡表条目的映射写错（把「原版」映到别的 key），以及「同一段意思两个 key」的漂移。
+        // 抓不住：core 那边改了这个中文串的措辞——那时这里会落到 Untranslated（**故意的**，
+        //         让漏译可见，而不是继续拿旧文案糊过去）。
+        assert_eq!(classify("原版"), CoreText::Key(Key::LoaderVanilla));
+        assert_eq!(
+            classify("静默失败（exit 0 但游戏没起来）"),
+            CoreText::Key(Key::LaunchOutcomeSilent)
+        );
+        assert_eq!(
+            classify("exit0 静默失败"),
+            CoreText::Key(Key::LaunchOutcomeSilent)
+        );
+        assert_eq!(
+            classify(" 原版 "),
+            CoreText::Key(Key::LoaderVanilla),
+            "前后空白要吃掉"
+        );
+    }
+
+    #[test]
+    fn brands_pass_through_and_are_never_translated() {
+        // 抓得住：品牌名被当成待翻译文案（`Fabric` → 某个 key 的译文就没人认识它了），
+        //         以及「品牌 + 版本号」这种合法徽标被判成未翻译。
+        // 抓不住：品牌名与版本号之间该用什么分隔（M3 令牌 / 排版层的事，不是本契约的事）。
+        assert_eq!(classify("Fabric"), CoreText::Brand("Fabric"));
+        assert_eq!(classify("Fabric 0.16.5"), CoreText::Brand("Fabric"));
+        assert_eq!(classify("NeoForge 21.1.72"), CoreText::Brand("NeoForge"));
+        assert_eq!(classify("Fabric 中文"), CoreText::Untranslated);
+        assert_eq!(classify("Fabric 0.16.5 beta"), CoreText::Untranslated);
+        assert_eq!(classify("FabricX"), CoreText::Untranslated);
+    }
+
+    #[test]
+    fn unknown_core_prose_is_refused_instead_of_printed_raw() {
+        // 抓得住：R3——未知中文（core 的诊断prose、`describe_warning` 的拼句）被放行到界面，
+        //         那正是 `Launch failed · exit0 静默失败` 这类混排的来源。
+        // 抓不住：UI 拿到 Untranslated 之后有没有真的只显示兜底（页面侧测试 + 截图验收）。
+        let leaks = [
+            "缺少库文件 lwjgl.jar（C:\\Users\\x\\.minecraft\\libs\\lwjgl.jar）",
+            "版本 JSON 没有 mainClass",
+            "退出码为 0 但疑似静默失败（3 条错误行）：游戏可能刚起来就被 mod 异常终止",
+            "",
+            "   ",
+        ];
+        for leak in leaks {
+            assert_eq!(classify(leak), CoreText::Untranslated, "{leak}");
+        }
+    }
+
+    #[test]
+    fn classify_never_returns_a_raw_unknown_string() {
+        // 抓得住：将来给 `CoreText` 加了「原样字符串」变体（那等于把 R3 废掉）。
+        // 抓不住：枚举里已有变体被误用——那要靠调用点 review。
+        let odd = "some untranslated english";
+        assert_eq!(classify(odd), CoreText::Untranslated);
+    }
+}

crates/i18n/src/catalog.rs

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+//! 消息目录：`Key` 枚举 + 中英两套常量表 + 取词 / 占位符渲染 / 缺译诊断。
+//!
+//! ## 为什么 key 是枚举而不是字符串
+//!
+//! 字符串 key（`"nav.instances"`）拼错了编译器一声不响，运行时才知道——本仓的说法是「运行时静默回落」。
+//! 枚举 key 把这类错误前移到**编译期**：`Key::NavInstance`（真名是 `NavInstances`）直接
+//! `error[E0599]`，不可能跑到运行时。
+//!
+//! **这里没有守卫测试**：曾经写过一个 `compile_fail` 文档测试想守这条，但复审实测它对
+//! 「把 `Key` 换成字符串包装类型」这类变异仍然全绿——它守的是「这段代码编译不过」，而不是
+//! 「编译期校验还在」。说不清真假的守卫比没有更糟，所以删了；这条纪律只靠枚举这个事实本身。
+//!
+//! ## 为什么两套译文写在**同一行**
+//!
+//! ```ignore
+//! NavInstances => ("Instances", "实例"),
+//! ```
+//!
+//! 一行就是「一个 key 的全部语言」。于是「加了 key 忘了译文」在结构上不可能发生——这比「运行时发现
+//! 缺译再诊断」更强。缺译诊断（[`Catalog::diagnose`]）因此有两个真实用途：
+//!
+//! 1. **注入目录**：后续 mission 用 [`Catalog::from_entries`] 加第三套（繁体 / 更多语言）时，
+//!    表格是手写的，缺条目的风险回来了；
+//! 2. **回归守门**：万一有人把这张表改回「两套各写一遍」，[`Catalog::missing`] 的守卫测试立刻红。
+//!
+//! ## 按域拆开（M99 `SETTINGSFRAME`）
+//!
+//! 条目表原先整张写在本文件里，而**设置页正文接下来由四条 mission 并行接**（java / download /
+//! language+appearance / ai+about），每条都要往这张表里加一批 key——同一张表就是四条线的冲突点。
+//! 现在一个域一个文件（`catalog/<域>.rs`），本文件只留：`catalog!` 宏、装配链、[`Catalog`] 与对外 API。
+//!
+//! | 文件 | 域 | 谁会长它 |
+//! |---|---|---|
+//! | [`nav`] / [`instances`] / [`loader`] / [`launch`] / [`font`] / [`core_text`] | 页面与运行时文案 | 各自页面 |
+//! | [`download`] / [`logs`] | 下载页 / 日志页（M94 / M95） | 那两页 |
+//! | `settings/`（`general` / `appearance` / `java` / `download` / `ai`） | 设置页，**一个分组一个文件** | 设置页四条线 |
+//! | [`general`] | 设置页 General 分组的**真控件**文案（语言选择器三档 + 主题/启动页/关闭三行） | M106 `I18NFOLLOW`（挂在链尾，既有顺序不动） |
+//!
+//! ### 域文件的形状（加 key 时照抄）
+//!
+//! ```ignore
+//! macro_rules! <域>_entries {
+//!     ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+//!         $next! { $($rest,)* {
+//!             $($acc)*
+//!             NavInstances => ("Instances", "实例"),
+//!         } }
+//!     };
+//! }
+//! pub(super) use <域>_entries;
+//! ```
+//!
+//! 它把本域条目**追加**到累积表 `$acc` 之后，再把「还没装配的域」原样交给 `$next`——最后交给
+//! [`finish`]，由它把整张表喂给 [`catalog!`]。**为什么非得这么绕**：`macro_rules!` 不能在
+//! 宏参数里展开另一个宏（`catalog! { nav_entries!() }` 只会把 `nav_entries!()` 当成普通 token），
+//! 也不能用元变量当宏名（`macro_rules! $name` 非法），所以只能「回调链」式累积。代价是每个域文件
+//! 都要重抄上面那 6 行签名——这是 `macro_rules!` 的固有成本，不是可以省掉的样板。
+//!
+//! ### 拆开之后仍然只有一个真相源
+//!
+//! 装配顺序写在下面那条调用里，**它等于 `Key` 的声明顺序**；[`golden`] 把拆分前那份
+//! `key -> (en, zh-CN)` 全量逐字节钉住（连顺序一起钉），所以「搬丢一条 / 两条互抄 / 顺序被调换」
+//! 都会红。
+//!
+//! ## 缺译时给什么
+//!
+//! **不回落**（绝不拿另一种语言顶替，用户会看到「一半英文一半中文」的界面而不自知）：
+//!
+//! - [`Catalog::get`] → `None`（严格调用方用它）；
+//! - [`Catalog::text`] → [`MISSING`]（`⟪missing⟫`，UI 上刺眼但一眼可辨）；
+//! - [`Catalog::render`] → `⟪missing:KeyName⟫`（带上 key 名，方便照着日志补译）。
+
+use crate::lang::Lang;
+
+/// 缺译占位符（`text()` 的返回；故意刺眼——宁可难看，也不许静默顶替）。
+pub const MISSING: &str = "⟪missing⟫";
+
+/// 生成 `Key` 枚举 + 两套常量表（一行 = 一个 key 的全部语言）。
+macro_rules! catalog {
+    ($($variant:ident => ($en:literal, $zh:literal)),+ $(,)?) => {
+        /// 可翻译文案的 key。**不存在时编译失败**（枚举变体名即契约）。
+        #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+        pub enum Key {
+            $(
+                #[doc = concat!("en: `", $en, "` / zh-CN: `", $zh, "`")]
+                $variant,
+            )+
+        }
+
+        impl Key {
+            /// 全部 key（缺译诊断与完整性测试的遍历源）。
+            pub const ALL: &'static [Key] = &[$(Key::$variant),+];
+
+            /// 变体名（日志 / 缺译诊断里用来指认 key；不是文案）。
+            #[must_use]
+            pub const fn name(self) -> &'static str {
+                match self {
+                    $(Key::$variant => stringify!($variant),)+
+                }
+            }
+        }
+
+        const EN: &[(Key, &str)] = &[$((Key::$variant, $en)),+];
+        const ZH_CN: &[(Key, &str)] = &[$((Key::$variant, $zh)),+];
+    };
+}
+
+// --------------------------------------------------------------- 域装配
+
+/// 链的终点：把累积起来的所有条目交给 [`catalog!`]，生成 `Key` 与两张表。
+macro_rules! finish {
+    ({ $($acc:tt)* }) => { catalog! { $($acc)* } };
+}
+
+mod account;
+mod agent;
+mod content;
+mod core_text;
+mod download;
+mod font;
+mod font_install;
+mod general;
+mod instances;
+mod launch;
+mod loader;
+mod logs;
+mod nav;
+mod settings;
+mod update;
+
+/// 拆分前的 `key -> (en, zh-CN)` **逐字快照**（金表）。
+///
+/// ## 它是什么
+///
+/// M99 把 `catalog.rs` 的单张条目表按域拆到 `catalog/<域>.rs` 之后，这 72 行就是「拆分前那一份」
+/// 的原样导出：由拆分前的 `Catalog::of(En)` / `Catalog::of(ZhCn)` 逐条 `println!` 出来，
+/// 再原封不动抄进来（生成方式见 `tests.rs` 里 `split_keeps_every_translation` 的注释）。
+/// M108 在它上面改了 3 条（`NavDownload` / `DownloadTitle` / `DownloadSubtitle`）、追加了 1 条
+/// （`NavDownloadExpanded`）；M105/M106/M107 各自追加的条目也都在，整表现在是 138 条。
+///
+/// ## 为什么不是「数条数」
+///
+/// 条数相等抓不住任何一种真会发生的坏法：某条译文在搬移时被漏掉、另一条被复制两次，条数照旧。
+/// 这张表比的是**全量、逐字节、按声明顺序**的三元组，于是下面四种坏法都会红：
+///
+/// | 坏法 | 红在哪 |
+/// |---|---|
+/// | 某个 key 整条被搬丢 | 条数不等 / 该行 key 名对不上 |
+/// | 两条 key 的译文互抄（同 key 被覆盖到别的译文） | 该行 en 或 zh 不等 |
+/// | 某条译文改了一个字符 | 该行不等（`assert_eq!` 带原文） |
+/// | 域的顺序被调换（`Key` 的 `Ord` 与导出表顺序都靠它） | 该行 key 名对不上 |
+///
+/// **抓不住**：译文本身翻得对不对（金表是「拆分前」的快照，它只能证明「没变」）。
+///
+/// ## M108 更新了三条、新增了一条（版本管理改名）
+///
+/// 用户令（2026-11-04）把这页的显示名从「下载 / Downloads」改成「版本管理 / Version management」：
+/// [`Key::NavDownload`] / [`Key::DownloadTitle`] / [`Key::DownloadSubtitle`]
+/// 三条译文按令改掉，并**新增** [`Key::NavDownloadExpanded`]（240 展开态的全标签，
+/// 88 轨放不下 18 字符的英文，见 `catalog/nav.rs` 的「两条 key」一节）。
+///
+/// 其余各行仍逐字节等于拆分前那份快照——也就是说这张表现在证明的是「除这几条按令改过的，
+/// 其余一字未动」，不再是「整表一字未动」。
+///
+/// ## M120 动了实例页那一族（1 条改译文 + 1 条删除 + 28 条新增）
+///
+/// 实例页的文案以前是英文基线字面量，M120 全搬进 `catalog/instances.rs`。那一族在装配链
+/// **第 2 位**（紧跟 nav），所以这批行是**插在中间**的，不是文件末尾追加：
+///
+/// | 动作 | 条目 |
+/// |---|---|
+/// | 改译文 | [`Key::InstancesEmptyBody`]（换成详情列真正画的那句） |
+/// | 删除 | `InstancesLastPlayed`（M117 加的整句，从未接线；页面是「标签 + 值」的元信息卡） |
+/// | 新增 | `InstancesTitle` … `InstancesStageWindow`（页头 / 动作 / 空态 / 元信息标签与值 / 隔离档位 / 运行状态 / 阶段，共 28 条） |
+///
+/// 位置跟着族走这个事实本身就是判据：金表是 `Key::ALL` 的逐 index 镜像，
+/// 「为把新 key 排到文件末尾而去重排别人的族」会让这里整片红。
+#[cfg(test)]
+mod golden;
+
+#[cfg(test)]
+mod tests;
+
+use account::account_entries;
+use agent::agent_entries;
+use content::content_entries;
+use core_text::core_text_entries;
+use download::{download_entries, version_entries};
+use font::font_entries;
+use font_install::font_install_entries;
+use general::general_entries;
+use instances::instances_entries;
+use launch::launch_entries;
+use loader::loader_entries;
+use logs::logs_entries;
+use nav::nav_entries;
+use settings::{
+    settings_accent_entries, settings_ai_entries, settings_appearance_entries,
+    settings_download_entries, settings_general_entries, settings_java_entries,
+};
+use update::update_entries;
+
+// 装配顺序 = `Key` 的声明顺序。**与拆分前逐条一致**，动它等于动 `Key` 的 `Ord` 与导出表顺序，
+// 金表（`catalog/golden.rs`）会红。设置页那五个域按页面上的分组顺序排，中间三个现在是空的。
+nav_entries! {
+    instances_entries,
+    loader_entries,
+    launch_entries,
+    font_entries,
+    settings_general_entries,
+    settings_appearance_entries,
+    settings_java_entries,
+    settings_download_entries,
+    settings_ai_entries,
+    core_text_entries,
+    download_entries,
+    logs_entries,
+    agent_entries,
+    general_entries,
+    // M107：版本管理页的侧栏 / 搜索文案**追加在链尾**（金表只追加不重排，理由见
+    // `catalog/download.rs` 里 `version_entries` 的文档）。M104 的 `agent_entries` 与 M106 的
+    // `general_entries` 已经在 main 上占了链尾，所以本域排在它们**之后**：
+    // `Key::ALL` 顺序 = 金表顺序 = 先 main 的全部域，再 version。
+    version_entries,
+    // M109：内容库页。与 M107 同一条纪律——本域排在 main 已占住的链尾**之后**，
+    // 于是 `Key::ALL` 顺序 = 金表顺序 = 先 main 的全部域，再 version，最后 content。
+    content_entries,
+    // M114：账户页。同理**追加在 main 已占住的链尾之后**（先 content 再 account），
+    // 金表只追加不重排。
+    account_entries,
+    // M159：自更新（设置页「更新」分组 + 顶部提示条）。同样只追加在链尾之后。
+    update_entries,
+    // M168：中文字体下载状态行（设置页 General 组）。同样只追加在链尾之后——
+    // `catalog/font.rs` 那四条老文案在链中间，往那里追加会平移其后所有 key（金表整片红）。
+    font_install_entries,
+    // M250：强调色一族（设置页 Appearance 组的第一个控件）。同理追加在链尾——`appearance`
+    // 那个域在链中间，往那里追加会平移其后所有 key（金表整片红）。
+    settings_accent_entries,
+    finish,
+    {}
+}
+
+/// 一套语言的目录（不可变；`Copy`，随手传值）。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Catalog {
+    lang: Lang,
+    entries: &'static [(Key, &'static str)],
+}
+
+impl Catalog {
+    /// 内置目录。
+    #[must_use]
+    pub const fn of(lang: Lang) -> Catalog {
+        let entries: &'static [(Key, &'static str)] = match lang {
+            Lang::En => EN,
+            Lang::ZhCn => ZH_CN,
+        };
+        Catalog { lang, entries }
+    }
+
+    /// 用外部表构造目录（给后续 mission 的第三套语言 / 测试注入用）。
+    #[must_use]
+    pub const fn from_entries(lang: Lang, entries: &'static [(Key, &'static str)]) -> Catalog {
+        Catalog { lang, entries }
+    }
+
+    /// 这套目录是哪种语言。
+    #[must_use]
+    pub const fn lang(&self) -> Lang {
+        self.lang
+    }
+
+    /// 严格取词：缺译就是 `None`（**不回落**到别的语言）。
+    #[must_use]
+    pub fn get(&self, key: Key) -> Option<&'static str> {
+        self.entries
+            .iter()
+            .find(|(entry, _)| *entry == key)
+            .map(|(_, text)| *text)
+    }
+
+    /// 这套目录的全部条目（声明顺序）。给导出 / 校对工具与完整性守门测试用。
+    #[must_use]
+    pub const fn entries(&self) -> &'static [(Key, &'static str)] {
+        self.entries
+    }
+
+    /// 取词（UI 便利路径）：缺译返回 [`MISSING`]。
+    #[must_use]
+    pub fn text(&self, key: Key) -> &'static str {
+        self.get(key).unwrap_or(MISSING)
+    }
+
+    /// 带变量的句子：把 `{name}` 换掉。
+    ///
+    /// 参数没给全时**占位符原样留在文案里**（`Launch failed (exit {code})`），不 panic、不猜空串——
+    /// 缺参在截图上一眼可见，比静默变成 `exit ` 好查。
+    #[must_use]
+    pub fn render(&self, key: Key, args: &[(&str, &str)]) -> String {
+        let Some(template) = self.get(key) else {
+            return format!("⟪missing:{}⟫", key.name());
+        };
+
+        let mut out = template.to_owned();
+        for (name, value) in args {
+            out = out.replace(&format!("{{{name}}}"), value);
+        }
+        out
+    }
+
+    /// 缺译的 key（自带语言里从来是空；注入目录与回归守门才用得上）。
+    #[must_use]
+    pub fn missing(&self) -> Vec<Key> {
+        Key::ALL
+            .iter()
+            .copied()
+            .filter(|key| self.get(*key).is_none())
+            .collect()
+    }
+
+    /// 人话诊断（`None` = 没有缺译）。一条缺译一行，附带英文原文当参考。
+    #[must_use]
+    pub fn diagnose(&self) -> Option<String> {
+        let missing = self.missing();
+        if missing.is_empty() {
+            return None;
+        }
+
+        let mut out = format!("{} 缺 {} 条译文：", self.lang.tag(), missing.len());
+        for key in missing {
+            let reference = Catalog::of(Lang::En)
+                .get(key)
+                .map_or_else(|| "<en 也缺>".to_owned(), |text| format!("\"{text}\""));
+            out.push_str(&format!("\n  - {} · en={reference}", key.name()));
+        }
+        Some(out)
+    }
+}
+
+/// 抽取文案里的 `{name}` 占位符（守门测试用：同一 key 的两套译文占位符必须一致）。
+#[must_use]
+pub fn placeholders(text: &str) -> Vec<&str> {
+    let mut found = Vec::new();
+    let mut rest = text;
+    while let Some(open) = rest.find('{') {
+        let after = &rest[open + 1..];
+        let Some(close) = after.find('}') else {
+            break;
+        };
+        found.push(&after[..close]);
+        rest = &after[close + 1..];
+    }
+    found
+}

crates/i18n/src/catalog/account.rs

@@ -0,0 +1,243 @@
+//! 账户页文案（M114 三轨：微软正版 / 第三方皮肤站 / 本地档案）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。本域**追加在装配链末尾**，
+//! 所以金表（`catalog::golden`）里这批 key 也排在最后。
+//!
+//! ## 口径（不许改写成别的说法）
+//!
+//! 本地档案的说明必须带「仅本地/隔离网络测试用，无法连接启用正版验证的服务器」——
+//! 这是 README 已定的口径（`AccountTrackOfflineBody` / `AccountOfflineWarning` 两处都写全），
+//! 不许写成「兼容旧启动器迁移」这种暗示能进正版服的说法。
+//!
+//! 文案里**没有任何 token 字样**：账户页从不展示凭据（M114 审核红线），
+//! 「密码只用于这一次登录」这条提示是唯一提到密码的地方。
+
+macro_rules! account_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 页头 / 列表
+            AccountTitle => ("Accounts", "账户"),
+            AccountSubtitle => ("Microsoft, third-party skin servers and local profiles", "微软正版、第三方皮肤站与本地档案"),
+            AccountListTitle => ("All accounts", "全部账户"),
+            AccountAddedOn => ("Added {date}", "添加于 {date}"),
+            AccountActiveChip => ("Active", "当前"),
+            AccountSwitch => ("Use for launch", "切换为启动账户"),
+            AccountRelogin => ("Sign in again", "重新登录"),
+            AccountRemove => ("Remove", "删除"),
+            AccountKindMicrosoft => ("Microsoft", "微软正版"),
+            AccountKindAuthlib => ("Third-party skin server", "第三方皮肤站"),
+            AccountKindOffline => ("Local profile", "本地档案"),
+            AccountServer => ("Server {server}", "服务器 {server}"),
+            // ── 空态
+            AccountEmptyTitle => ("No accounts yet", "还没有账户"),
+            AccountEmptyBody => ("Add a Microsoft account, a third-party skin server account, or a local profile.", "添加微软正版账户、第三方皮肤站账户，或建一个本地档案。"),
+            AccountEmptyAction => ("Add an account", "添加账户"),
+            // ── 三条轨道的入口卡
+            AccountTrackMicrosoftTitle => ("Microsoft account", "微软正版"),
+            AccountTrackMicrosoftBody => ("Sign in with a device code or in your browser. Online servers require this kind of account.", "用设备码或浏览器登录。联机服务器必须用这种账户。"),
+            AccountTrackAuthlibTitle => ("Third-party skin server", "第三方皮肤站"),
+            AccountTrackAuthlibBody => ("An authlib-injector compatible server (LittleSkin and friends) brings its own skins and capes.", "兼容 authlib-injector 的皮肤站（如 LittleSkin）自带皮肤与披风。"),
+            AccountTrackOfflineTitle => ("Local profile", "本地档案"),
+            AccountTrackOfflineBody => ("Local / isolated-network testing only — it cannot join servers that require a genuine Minecraft account.", "仅本地/隔离网络测试用，无法连接启用正版验证的服务器。"),
+            AccountTrackOpen => ("Sign in", "登录"),
+            AccountTrackCreate => ("Create profile", "创建档案"),
+            AccountDialogClose => ("Close", "关闭"),
+            // ── 本地档案表单
+            AccountOfflineNameLabel => ("Profile name", "档案名"),
+            AccountOfflineNameHint => ("3–16 letters, digits or underscore", "3–16 位字母、数字或下划线"),
+            AccountOfflineSubmit => ("Create profile", "创建档案"),
+            AccountOfflineWarning => ("Local / isolated-network testing only — it cannot join servers that require a genuine Minecraft account.", "仅本地/隔离网络测试用，无法连接启用正版验证的服务器。"),
+            // ── 微软登录面板（设备码 / 授权码）
+            AccountDeviceCodeLabel => ("Enter this code", "输入这个用户码"),
+            AccountDeviceCodeCopy => ("Copy code", "复制用户码"),
+            AccountDeviceLinkCopy => ("Copy link", "复制链接"),
+            AccountDeviceCountdown => ("{time} left", "剩 {time}"),
+            AccountDeviceExpired => ("This code has expired. Start again for a fresh one.", "这个用户码已过期，重新开始换一个新的。"),
+            AccountDeviceRetry => ("Try again", "重试"),
+            AccountDeviceCancel => ("Cancel", "取消"),
+            AccountDeviceBrowser => ("Sign in with browser", "用浏览器登录"),
+            // M178 复审 r1 P2-5：这是**主按钮**（设备码流），不能读起来像备选。
+            AccountDeviceSignIn => ("Sign in with your Microsoft account", "使用 Microsoft 账户登录"),
+            AccountDeviceFallbackHint => ("No browser handy? This way shows a code you can type on any device.", "浏览器打不开就用这个：它会给一串用户码，在任何设备上输入即可。"),
+            // ── 第三方站表单
+            AccountServerLabel => ("Server address", "服务器地址"),
+            AccountServerHint => ("API root, e.g. https://littleskin.cn/api/yggdrasil/", "API 根，例：https://littleskin.cn/api/yggdrasil/"),
+            AccountServerProbe => ("Check server", "校验服务器"),
+            AccountLoginNameLabel => ("Email or username", "邮箱或用户名"),
+            AccountPasswordLabel => ("Password", "密码"),
+            AccountPasswordHint => ("Used once for this sign-in. It is never stored.", "只在这次登录里用一次，不会保存。"),
+            AccountAuthlibSubmit => ("Sign in", "登录"),
+            AccountAuthlibIdleHint => ("The server is checked automatically when you sign in; Check server only does it up front.", "登录时会自动校验服务器；「校验服务器」只是提前跑一遍。"),
+            // ── 皮肤区
+            AccountSkinTitle => ("Skin", "皮肤"),
+            AccountSkinNone => ("No skin available", "没有可用皮肤"),
+            AccountSkinHint => ("Skins come from the account's own server; nothing is generated locally.", "皮肤来自账户自己的服务器，本地不生成任何假皮肤。"),
+            // ── 导航轨底部头像
+            AccountRailSignedOut => ("Not signed in", "未登录"),
+            AccountDeviceHint => ("Open the link in your browser and enter the code above.", "在浏览器里打开链接，输入上面的用户码。"),
+            AccountDeviceBrowserHint => ("Finish the sign-in in the browser window we just opened; the link below also works.", "在我们刚打开的浏览器窗口里完成登录；下面的链接也能手动打开。"),
+            AccountServerChecking => ("Checking the server…", "正在校验服务器…"),
+            AccountServerOk => ("Server {server} is ready", "服务器 {server} 可用"),
+            AccountLoginFailed => ("Sign-in failed", "登录失败"),
+            AccountCurrentTitle => ("Current account", "当前账户"),
+            // ── 失败原因码（M114 r2：后端只给码，文案在这里；原文只进日志）
+            AccountFailureCode => ("Code: {code}", "代码：{code}"),
+            AccountFailureDenied => ("The server refused this sign-in (access denied).", "服务器拒绝了这次登录（拒绝访问）。"),
+            AccountFailureWhitelist => ("Microsoft has not approved this launcher's app registration yet. An administrator has to accept the app, then try again.", "微软还没批准本启动器的应用注册：需要管理员同意该应用后再试。"),
+            AccountFailureUnreachable => ("Could not reach the server. Check the network connection or the address, then try again.", "连不上服务器：检查网络或地址后重试。"),
+            AccountFailureNotAuthlib => ("This address does not look like an authlib-injector server (the API root usually ends with /api/yggdrasil/).", "这个地址不像 authlib-injector 服务器（API 根通常以 /api/yggdrasil/ 结尾）。"),
+            AccountFailureBadCredentials => ("The server rejected the username or password.", "服务器不认这个用户名或密码。"),
+            AccountFailureNoProfile => ("The account has no Minecraft profile on this server yet. Create the character on the server first.", "这个账号在该服务器上还没有角色：先在皮肤站里创建角色。"),
+            AccountFailureStore => ("Could not save the account to disk.", "账户没能写到磁盘上。"),
+            AccountFailureOther => ("The sign-in failed. The full reason is in the launcher log.", "登录失败，完整原因在启动器日志里。"),
+            // M132：缺 client id 是**配置项缺失**，原因就是用户能执行的下一步，所以这一条
+            // 必须自己说清「缺什么、怎么补」，不许退回上面那句「完整原因在日志里」。
+            // 纪律：只写环境变量名与 `<id>` 占位，**不许出现任何真实 client id**；
+            // 也不许写成「未支持 / unsupported」——登录链路是完整的。
+            AccountLoginNotConfigured => ("Microsoft sign-in is not configured", "微软登录未配置"),
+            AccountFailureMsaNotConfigured => (
+                "This build has no Azure public client id, so Microsoft sign-in cannot start (the sign-in flow itself is implemented). Set the environment variable ULL_MSA_CLIENT_ID=<id> before starting the launcher, or build with ULL_MSA_CLIENT_ID=<id>. Then restart the launcher: a running process does not pick up a new environment variable.",
+                "本启动器没有配置 Azure 公共客户端 id，微软登录无法开始（登录功能已实现，只差这一项配置）。启动前设置环境变量 ULL_MSA_CLIENT_ID=<id>，或构建时注入：ULL_MSA_CLIENT_ID=<id> cargo build。改完请重启启动器——已在运行的进程读不到新设的环境变量。"
+            ),
+            AccountDeviceRequesting => ("Contacting Microsoft…", "正在联系微软…"),
+            AccountLoginSucceeded => ("Signed in as {name}", "已登录 {name}"),
+            // ── 账户页横幅（添加/删除/切换的结果；页面上真实可见，不是 toast）
+            AccountNoticeAdded => ("Added {name}", "已添加 {name}"),
+            AccountNoticeRemoved => ("Removed {name}", "已删除 {name}"),
+            AccountNoticeSwitched => ("{name} will be used for the next launch", "{name} 将作为下次启动的账户"),
+            AccountNoticeOfflineNameInvalid => ("Profile names must be 3–16 letters, digits or underscores.", "档案名必须是 3–16 位字母、数字或下划线。"),
+            AccountNoticeAccountExists => ("An account with that name already exists.", "同名账户已经存在。"),
+            AccountNoticeStoreFailed => ("Could not save the account store. Check the disk and try again.", "账户库写不进去：检查磁盘后重试。"),
+            AccountNoticeNotFound => ("That account no longer exists.", "这个账户已经不在了。"),
+            AccountNoticeOther => ("The account action failed. The full reason is in the launcher log.", "账户操作失败，完整原因在启动器日志里。"),
+            AccountNoticeDismiss => ("Dismiss", "关闭"),
+            AccountNoticeTitleFailed => ("Account action failed", "账户操作失败"),
+            AccountNoticeTitleDone => ("Account updated", "账户已更新"),
+            // ── 重新登录的引导
+            AccountHintAuthlibReauth => ("Enter the password again for {server}.", "请输入 {server} 的密码。"),
+            AccountHintOfflineNoRelogin => ("Local profiles have no server account to sign in again — create a new profile instead.", "本地档案没有可重新登录的服务器账户，请新建一个档案。"),
+            // ── 浏览器登录回退到设备码的说明（M178）
+            // 口径：这不是「登录失败」——设备码接着跑。第一句说清「已改用设备码」，
+            // 需要改配置的那一条**必须给可照抄的下一步**（哪个门户、加什么值、端口不参与匹配），
+            // 且**不许**出现 AAD 的原始报文（`invalid_request` / `AADSTS…` / JSON）——
+            // 用户 2026-11-08 实测撞到的就是那张原始错误页。
+            AccountBrowserFallbackNotRegistered => (
+                "This build's app registration has no loopback redirect URI, so browser sign-in cannot work; switched to a device code. To fix: add http://localhost/auth under Redirect URIs in the Azure app registration (the port is ignored), then restart the launcher.",
+                "这个构建的应用注册里没有登记回环重定向 URI，浏览器登录用不了，已自动改用设备码。怎么修：在 Azure 应用注册的「重定向 URI」里加上 http://localhost/auth（端口不参与匹配），然后重启启动器。"
+            ),
+            AccountBrowserFallbackUnverified => (
+                "Could not confirm that browser sign-in is usable, so it switched to a device code.",
+                "没能确认浏览器登录是否可用（预检没成功），已自动改用设备码。"
+            ),
+            AccountBrowserFallbackFailed => (
+                "Browser sign-in did not finish, so it switched to a device code. If the browser page said the redirect URI is not valid, add http://localhost/auth under Redirect URIs of the app registration.",
+                "浏览器登录没有完成，已自动改用设备码。如果浏览器里提示 redirect_uri 无效，请把 http://localhost/auth 加进应用注册的「重定向 URI」。"
+            ),
+        } }
+    };
+}
+
+pub(crate) use account_entries;
+
+#[cfg(test)]
+mod tests {
+    use crate::{Catalog, Key, Lang};
+
+    /// **M178**：浏览器登录回退到设备码时那一句，必须「说清为什么 + 怎么修」，且**不许**把
+    /// AAD 的原始报文搬上屏（用户实测撞到的正是那张 `invalid_request ... redirect_uri` 错误页）。
+    ///
+    /// 抓得住：文案退回「登录失败，完整原因在日志里」、删掉可照抄的重定向 URI、或有人把
+    /// AAD 原始错误码/JSON 塞进词条。
+    /// 抓不住：读起来顺不顺（那靠 review 与截图）。
+    #[test]
+    fn the_browser_fallback_copy_explains_itself_without_raw_aad_text() {
+        for &lang in Lang::ALL {
+            let catalog = Catalog::of(lang);
+            let not_registered = catalog.text(Key::AccountBrowserFallbackNotRegistered);
+            let unverified = catalog.text(Key::AccountBrowserFallbackUnverified);
+            let failed = catalog.text(Key::AccountBrowserFallbackFailed);
+            // 「已改用设备码」这条结论三句里都得有（用户要知道画面为什么变了）。
+            for copy in [not_registered, unverified, failed] {
+                assert!(
+                    copy.contains("device code") || copy.contains("设备码"),
+                    "{}: {copy}",
+                    lang.tag()
+                );
+                // 原文不上屏：这两条是 AAD 的机器码，出现即语言/脱敏纪律失效。
+                assert!(!copy.contains("invalid_request"), "{}: {copy}", lang.tag());
+                assert!(!copy.contains("AADSTS"), "{}: {copy}", lang.tag());
+                assert!(!copy.contains('{'), "{}: {copy}", lang.tag());
+            }
+            // 「没登记回环」这一条必须给**可照抄**的下一步（门户 + 值 + 端口不参与匹配）。
+            assert!(
+                not_registered.contains("http://localhost/auth"),
+                "{not_registered}"
+            );
+            assert!(
+                not_registered.to_lowercase().contains("redirect uri")
+                    || not_registered.contains("重定向 URI"),
+                "{not_registered}"
+            );
+            assert!(
+                not_registered.to_lowercase().contains("port") || not_registered.contains("端口"),
+                "{not_registered}"
+            );
+        }
+    }
+
+    /// **M132**：缺 client id 这条是本页唯一「说清原因」的失败文案，它的纪律比别的正文更硬。
+    ///
+    /// 抓得住：文案退回「登录失败 / 完整原因在日志里」、退化成「未支持」、或者只说缺 id 却
+    ///         不给要设的变量名；也能抓住有人把某个真实 client id 写进词条。
+    /// 抓不住：读起来顺不顺（那靠 review 与截图）。
+    #[test]
+    fn the_missing_client_id_copy_says_what_to_configure_in_both_languages() {
+        for &lang in Lang::ALL {
+            let catalog = Catalog::of(lang);
+            let title = catalog.text(Key::AccountLoginNotConfigured);
+            let body = catalog.text(Key::AccountFailureMsaNotConfigured);
+            let all = format!("{title}\n{body}");
+
+            assert!(body.contains("ULL_MSA_CLIENT_ID"), "{}: {all}", lang.tag());
+            assert!(
+                body.contains("<id>"),
+                "示例只许用占位：{}: {all}",
+                lang.tag()
+            );
+            // 面板上是「标题 + 正文」一起：结论（未配置）给标题，怎么做给正文。
+            assert!(
+                all.to_lowercase().contains("not configured") || all.contains("未配置"),
+                "要说清「未配置」：{}: {all}",
+                lang.tag()
+            );
+            assert!(!body.to_lowercase().contains("unsupported"), "{all}");
+            assert!(
+                !body.contains("未支持") && !body.contains("未实现"),
+                "{all}"
+            );
+            // 不许退回「完整原因在日志里」那句（那正是用户报的 bug）
+            assert!(!body.contains("launcher log"), "{all}");
+            assert!(!body.contains("启动器日志"), "{all}");
+            // 硬约束：`ULL_MSA_CLIENT_ID=` 后面只许跟 `<id>` 占位——写进来一个真 id 就红。
+            assert_eq!(
+                body.matches("ULL_MSA_CLIENT_ID=").count(),
+                body.matches("ULL_MSA_CLIENT_ID=<id>").count(),
+                "示例里出现了真 id：{all}"
+            );
+        }
+        for &lang in Lang::ALL {
+            let catalog = Catalog::of(lang);
+            let title = catalog.text(Key::AccountLoginNotConfigured);
+            assert!(
+                title.to_lowercase().contains("not configured") || title.contains("未配置"),
+                "{}: {title}",
+                lang.tag()
+            );
+            assert!(
+                !title.contains('=') && !title.contains("ULL_MSA_CLIENT_ID"),
+                "标题只报结论，变量名在正文里：{title}"
+            );
+        }
+    }
+}

crates/i18n/src/catalog/agent.rs

@@ -0,0 +1,66 @@
+//! AI 助手栏 / AI 独立页的文案（M104 `AGENTRAIL`）。
+//!
+//! 这两处**共用同一套会话视图**（`crates/app-iced/src/pages/agent/`），所以文案也只在这里出现一次：
+//! 栏上的折叠/拆出、页上的收回、两处都要的发送/中断/空会话引导。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节：本宏把条目**追加**到 `$acc` 之后，
+//! 再把「还没装配的域」原样交给 `$next`。条目顺序 = `Key` 的声明顺序（金表 `catalog::golden` 守门）。
+//!
+//! **新增 key 时按顺序追加在最后**：金表是「拆分前那份表的逐字快照」，重排既有行会让它红。
+
+macro_rules! agent_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── AI 助手（右栗 + 独立页共用）
+            AgentTitle => ("Assistant", "助手"),
+            // M119 r1 复审 P2-1：这条一度被改成中性的「会话」，理由是「跑什么后端由端点标签说」——
+            // 但端点标签在壳里根本不存在，于是默认配置下用户看到的是一个像是接上了模型的助手。
+            // 现在把诚实的话写回来，而且它是**常驻**的（标题下就一行，不点也能看到）。
+            AgentSubtitle => ("Simulated assistant · no real model is connected", "模拟助手 · 还没接真实模型"),
+            AgentCollapse => ("Collapse", "收起"),
+            AgentDetach => ("Pop out", "拆出"),
+            AgentDock => ("Dock back", "收回"),
+            AgentOpen => ("Open assistant", "打开助手"),
+            AgentStripLabel => ("AI", "助手"),
+            AgentSend => ("Send", "发送"),
+            AgentStop => ("Stop", "中断"),
+            // 输入框上再说一次：用户真要动手的位置就在这儿
+            AgentPlaceholder => ("Message the simulated assistant…", "给模拟助手发消息…"),
+            AgentEmptyTitle => ("Nothing in this session yet", "这个会话还没有内容"),
+            // 空会话是最容易被误读的一屏（没有人说过话，很容易以为是「连上了但还没问」）
+            AgentEmptyBody => ("Ask about instances, downloads or logs. This assistant is simulated: no real model is connected.", "可以问实例、下载或日志。当前是模拟助手，没有接真实模型。"),
+            AgentNotePending => ("Placeholder shell: your message is kept here, nothing was sent to a model.", "占位外壳：消息留在这里，没有发给任何模型。"),
+            AgentNoteStopped => ("Stopped by you.", "你中断了这次回复。"),
+            AgentUnread => ("{count} unread", "{count} 条未读"),
+            AgentResize => ("Drag to resize the assistant rail", "拖动调整助手栏宽度"),
+            AgentWidthLabel => ("Width {width}", "宽度 {width}"),
+            AgentRoleYou => ("You", "你"),
+            AgentRoleAssistant => ("Assistant", "助手"),
+            AgentRoleNotice => ("Notice", "提示"),
+            // ── M119：失败态与写操作确认（接线后才有；`AgentRail::error` / `rail.confirm`）
+            //
+            // 为什么必须成 key：任务要求「presenter 出错时 UI 显示**具名**错误」，
+            // 而 M106 立的规矩是界面文案一律走 catalog——没有键就只能硬编码中英。
+            AgentErrorTitle => ("Assistant error", "助手出错"),
+            AgentErrorUnavailable => ("Couldn't reach the assistant backend. Check the endpoint, then try again.", "连不上助手后端：检查端点后重试。"),
+            AgentErrorNotImplemented => ("This assistant request isn't wired up yet.", "这个助手请求还没接线。"),
+            AgentConfirmRequest => ("The assistant wants to change something: {summary}", "助手想改一项设置：{summary}"),
+            AgentConfirmAllow => ("Allow", "允许"),
+            AgentConfirmDeny => ("Deny", "拒绝"),
+            // 头部常驻小标记（P2-1）：与副标题/占位符互为冗余，三个位置都能看到「这是模拟」
+            AgentSimulated => ("Simulated", "模拟"),
+            // ── M119 r2：三处文案的**真实态**配对（模拟态用上面那三条已有的 key）
+            //
+            // 复审 r2 的 P2-1：上一轮只有标题胶囊由 `simulated` 驱动，副标题/占位符/空态正文是
+            // 无条件取词，而那三条译文里写着「模拟 / 没接真实模型」——接上真 transport 之后
+            // 这三句会**反方向**地留着。现在配成对：`simulated == true` 走模拟态，
+            // `false` 走这三条中性话（`pages/agent/tests/disclaimer.rs` 钉住四处一起变）。
+            AgentSubtitleReal => ("Conversation", "会话"),
+            AgentPlaceholderReal => ("Message the assistant…", "给助手发消息…"),
+            AgentEmptyBodyReal => ("Ask about instances, downloads or logs.", "可以问实例、下载或日志。"),
+        } }
+    };
+}
+
+pub(crate) use agent_entries;

crates/i18n/src/catalog/content.rs

@@ -0,0 +1,363 @@
+//! 内容库文案（M109 `CONTENTDL`）。
+//!
+//! 一句话一个 key：带变量的句子用 `{name}`，页面只做 [`crate::Catalog::render`]，不拼片段。
+//!
+//! ## 三条口径
+//!
+//! 1. **只说能做的事**：整合包那条写的是「要等导入管线」，不是「稍后自动支持」；
+//! 2. **站名也进词表**：`Modrinth` / `CurseForge` 的**中文译文必须与英文不同**
+//!    （`catalog/tests.rs` 的 `chinese_catalog_is_actually_chinese` 会红），所以中文写成「Modrinth 源」；
+//! 3. **禁用态要能解释自己**：`ContentIncompatible*` / `ContentModpackNotReady` 就是禁用按钮旁边那几句话——
+//!    没有它们，禁用就等于「点了没反应」。
+//!
+//! 域文件的形状见 `crate::catalog` 的「域装配」一节。
+
+macro_rules! content_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // --- content library page (M109) ---
+            ContentTitle => ("Content", "内容库"),
+            ContentSubtitle => (
+                "Modpacks, mods, resource packs and shaders",
+                "整合包、Mod、资源包与光影"
+            ),
+            ContentSectionVersions => ("Version management", "版本管理"),
+            ContentSectionContent => ("Content library", "内容库"),
+            ContentKindModpack => ("Modpacks", "整合包"),
+            ContentKindMod => ("Mods", "Mod"),
+            ContentKindResourcepack => ("Resource packs", "资源包"),
+            ContentKindShader => ("Shaders", "光影"),
+            ContentSourceModrinth => ("Modrinth", "Modrinth 源"),
+            ContentSourceCurseforge => ("CurseForge", "CurseForge 源"),
+            ContentSortRelevance => ("Relevance", "相关度"),
+            ContentSortDownloads => ("Downloads", "下载量"),
+            ContentSortNewest => ("Newest", "最新发布"),
+            ContentSortUpdated => ("Recently updated", "最近更新"),
+            ContentSearchPlaceholder => ("Search content…", "搜索内容…"),
+            ContentSearch => ("Search", "搜索"),
+            ContentFilterVersion => ("Game version", "游戏版本"),
+            ContentFilterLoader => ("Loader", "加载器"),
+            ContentFilterAny => ("Any", "不限"),
+            ContentCount => ("{count} results", "{count} 个结果"),
+            ContentLoading => ("Loading content…", "正在加载内容…"),
+            ContentLoadingHint => (
+                "Results come from the network; nothing is cached offline yet.",
+                "结果来自网络，暂时没有离线缓存。"
+            ),
+            ContentEmptyTitle => ("Nothing matched", "没有匹配的内容"),
+            ContentEmptyBody => (
+                "Try another keyword, or clear a filter.",
+                "换个关键词，或清掉一个筛选条件。"
+            ),
+            ContentFailedTitle => ("Could not load content", "内容加载失败"),
+            ContentFailedBody => ("Check the network, then retry.", "检查网络后重试。"),
+            ContentOfflineTitle => ("No connection", "未联网"),
+            ContentOfflineBody => (
+                "Content search needs the network. Check your connection, then retry.",
+                "内容检索需要联网。检查网络后重试。"
+            ),
+            ContentRetry => ("Retry", "重试"),
+            ContentLoadMore => ("Load more", "加载更多"),
+            ContentNoMore => ("No more results", "没有更多了"),
+            ContentDetailEmpty => (
+                "Pick an item to see what it supports.",
+                "选一个项目看它支持什么。"
+            ),
+            ContentDetailDownloads => ("{count} downloads", "下载量 {count}"),
+            ContentDetailUpdated => ("Updated {date}", "更新于 {date}"),
+            ContentDetailLoaders => ("Loaders: {list}", "加载器：{list}"),
+            ContentDetailVersions => ("Game versions: {list}", "游戏版本：{list}"),
+            ContentDetailFetching => ("Loading versions…", "正在取版本列表…"),
+            ContentDetailFetchFailed => (
+                "Could not load versions: {reason}",
+                "版本列表取不到：{reason}"
+            ),
+            ContentDetailVersionCount => ("{count} versions", "{count} 个版本"),
+            ContentDetailVersionLine => ("{number} · {kind} · {date}", "{number}（{kind}）· {date}"),
+            ContentInstall => ("Install into instance", "装入实例"),
+            ContentTargetInstance => ("Target instance", "目标实例"),
+            ContentNoInstances => ("No instance to install into", "没有可装入的实例"),
+            ContentIncompatibleVersion => (
+                "Needs {version}; this instance runs {actual}",
+                "需要 {version}，该实例运行的是 {actual}"
+            ),
+            ContentIncompatibleLoader => ("Not built for {loader}", "不支持 {loader}"),
+            ContentModpackNotReady => (
+                "Installing modpacks from the library into an instance is not available yet",
+                "从内容库一键安装整合包到实例还没做（本地的包可以直接导入）"
+            ),
+            ContentSourceUnavailable => (
+                "CurseForge needs an API key: add one in Settings",
+                "CurseForge 需要在设置里配置密钥才能搜索"
+            ),
+            ContentSourceNotWired => (
+                "Installing from CurseForge is not available yet",
+                "CurseForge 来源的安装尚未开放"
+            ),
+            // --- M191：安装失败的两档分组与「只重试这些」---
+            // 两档**各一条**：不兼容要换版本/加载器，取不到要检查网络，合并成一句会让用户
+            // 对着一条重试必然失败的项反复点重试。
+            ContentInstallFailedTitle => (
+                "Install did not finish — {count} items failed",
+                "安装未完成 —— {count} 项没装上"
+            ),
+            ContentInstallRetryIncompatible => (
+                "Not available for this version/loader",
+                "不兼容所选版本/加载器"
+            ),
+            ContentInstallRetryUnreachable => (
+                "Could not fetch (network or missing project)",
+                "取不到（网络 / 项目不存在）"
+            ),
+            ContentInstallRetryOnly => (
+                "Retry just these {count}",
+                "只重试这 {count} 个"
+            ),
+            ContentInstallRetryHint => (
+                "Retry asks again only for the items above; files that already landed stay put.",
+                "重试只重新解析上面这几项，已落盘的文件不动。"
+            ),
+            // --- M113: pack import / export（PACKUI）---
+            PackTitle => ("Modpack import & export", "整合包导入 / 导出"),
+            PackImportTitle => ("Import a modpack", "导入整合包"),
+            PackDropHint => (
+                "Drop a .mrpack, .zip or a MultiMC/Prism instance folder here",
+                "把 .mrpack / .zip 或 MultiMC·Prism 实例目录拖到这里"
+            ),
+            PackDropActive => ("Release to probe the pack", "松手开始探测"),
+            PackNoDialog => (
+                "This build has no system file picker: drag the file in, or paste its path below.",
+                "本版没有系统文件选择框：请把文件拖进来，或在下面粘贴路径。"
+            ),
+            PackPathLabel => ("Pack path", "整合包路径"),
+            PackPathPlaceholder => (
+                "D:\\packs\\Better MC.mrpack",
+                "D:\\整合包\\更好的MC.mrpack"
+            ),
+            PackImportAction => ("Import", "导入"),
+            PackCancel => ("Cancel import", "取消导入"),
+            PackDismiss => ("Dismiss", "关闭"),
+            PackTargetLabel => ("Install into", "装到实例"),
+            PackTargetNew => ("New instance", "新建实例"),
+            PackInstanceName => ("Instance name", "实例名"),
+            PackStageLine => ("Step {index}/{total} · {stage}", "步骤 {index}/{total} · {stage}"),
+            PackStageProbe => ("Reading the manifest", "读取清单"),
+            PackStageExtract => ("Unpacking overrides", "解包覆盖内容"),
+            PackStageFetch => ("Fetching missing files", "补下载文件"),
+            PackStageCommit => ("Writing files", "落地写盘"),
+            PackStageRegister => ("Registering the instance", "登记实例"),
+            PackProbeTitle => (
+                "This pack is almost a known format",
+                "这个包差一点就是已知格式"
+            ),
+            PackProbeLooksLike => (
+                "Looks like {format}, but missing: {missing}",
+                "看起来像 {format}，但缺：{missing}"
+            ),
+            PackProbeUnknown => (
+                "No known format claims this pack",
+                "没有任何已知格式认领这个包"
+            ),
+            PackProbeSaw => ("Found in the pack: {saw}", "包里看到：{saw}"),
+            PackProbeNothing => ("nothing recognisable", "没有可识别的东西"),
+            PackStatusSuccess => ("Imported", "已导入"),
+            PackStatusPartial => ("Imported with gaps", "导入完成，但有缺口"),
+            PackStatusFailed => ("Import failed — rolled back", "导入失败 —— 已整包回滚"),
+            PackReportWritten => ("Files written: {count} · {bytes}", "{count} 个文件已写盘 · {bytes}"),
+            PackReportMissing => (
+                "Could not fetch (tolerated): {count}",
+                "有 {count} 个文件没搞到（可容忍）"
+            ),
+            PackReportConflicts => (
+                "Conflicts: {count}",
+                "冲突：{count} 个"
+            ),
+            PackReportRejected => (
+                "The client does not support these: {count}",
+                "这些组件客户端不支持：{count} 个"
+            ),
+            PackReportRejectedNote => ("not supported by the client", "客户端不支持"),
+            PackCancelled => (
+                "Cancel requested — the pipeline is stopping now; the real outcome follows.",
+                "已请求取消 —— 后台正在停手，真实结果随后给出。"
+            ),
+            PackStatusCancelled => ("Cancelled — rolled back", "已取消 —— 已回滚"),
+            PackCancelIncomplete => (
+                "Cancelled — rollback incomplete: the target directory may differ from before the import.",
+                "已取消 —— 回滚没做完：目标目录可能与导入前不同。"
+            ),
+            PackCancelTooLate => (
+                "The cancel arrived too late: this import already finished. The instance is kept; same-name files may already be overwritten.",
+                "取消来得太晚：这次导入已经跑完，实例会保留，同名文件可能已被覆盖。"
+            ),
+            PackOverwriteAction => ("Re-import, the pack wins", "以包为准重新导入"),
+            PackOverwriteNote => (
+                "Keeping both (renamed) is not supported yet: for each existing file you pick either “keep” or “overwrite”.",
+                "「两者都留（改名）」暂不支持：每个已存在的文件只能选「保留」或「覆盖」。"
+            ),
+            PackMissingOffline => ("offline import", "离线导入"),
+            PackMissingNoSource => (
+                "no download source available yet",
+                "暂时拿不到下载地址"
+            ),
+            PackMissingFetchFailed => ("download failed: {detail}", "下载失败：{detail}"),
+            PackFatalTitle => (
+                "Rolled back — nothing was left behind",
+                "已回滚 —— 目标目录零残留"
+            ),
+            PackFatalHint => ("What to try next", "下一步可以试"),
+            PackConflictUserModified => ("you changed it", "你改过"),
+            PackConflictUserDeleted => ("you deleted it", "你删过"),
+            PackConflictPreExisting => ("was already there", "本来就在"),
+            PackChoiceKeepUser => ("kept yours", "保留我的"),
+            PackChoiceOverwrite => ("pack version used", "用包里的"),
+            PackConflictHashes => (
+                "pack {pack} · base {base} · disk {disk}",
+                "包内 {pack} · 基线 {base} · 磁盘 {disk}"
+            ),
+            PackConflictDetail => ("Hashes", "三方哈希"),
+            PackPickTitle => (
+                "Before importing: {count} files already exist with different content",
+                "导入前：有 {count} 个文件已存在且内容不同"
+            ),
+            PackPickSummary => (
+                "Keep {keep} · overwrite {overwrite} · overwriting discards {bytes}",
+                "保留 {keep} · 覆盖 {overwrite} · 覆盖将丢弃 {bytes}"
+            ),
+            PackPickKeepAll => ("Keep all mine", "全部保留我的"),
+            PackPickOverwriteAll => ("Overwrite all", "全部覆盖"),
+            PackPickRowKeep => ("Keep", "保留"),
+            PackPickRowOverwrite => ("Overwrite", "覆盖"),
+            PackPickPage => ("Items {from}-{to} of {total}", "第 {from}-{to} 项，共 {total} 项"),
+            PackPickPrev => ("Previous", "上一页"),
+            PackPickNext => ("Next", "下一页"),
+            PackPickConfirm => ("Import with these choices", "按这些选择导入"),
+            PackPickCancel => ("Cancel import", "取消导入"),
+            PackPickDefaultNote => (
+                "Anything you do not change stays as you have it: file content is only replaced where you pick “Overwrite”.",
+                "没有改动的一律按「保留」：只有你点了「覆盖」的文件才会被包内内容替换。"
+            ),
+            PackPickUnknownRemote => (
+                "{count} remote entries only learn their path after download; they follow “keep”.",
+                "还有 {count} 条远端条目要下载后才知道路径，一律按「保留」处置。"
+            ),
+            PackPickSourceOverrides => ("in the pack (overrides/)", "包内 overrides/"),
+            PackPickSourceClientOverrides => ("in the pack (client-overrides/)", "包内 client-overrides/"),
+            PackPickSourceManifest => ("manifest files[]", "清单 files[]"),
+            PackPickDisk => ("yours: {size}", "你的：{size}"),
+            PackPickIncoming => ("pack: {size}", "包内：{size}"),
+            PackFormatModrinth => ("Modrinth .mrpack", "Modrinth 的 .mrpack"),
+            PackFormatCurseforge => ("CurseForge manifest", "CurseForge 清单"),
+            PackFormatMultimc => ("MultiMC / Prism instance", "MultiMC·Prism 实例"),
+            PackExportTitle => ("Export this instance", "导出这个实例"),
+            PackExportOpen => ("Export…", "导出…"),
+            PackExportFormat => ("Format", "格式"),
+            PackExportName => ("Pack name", "包名"),
+            PackExportVersion => ("Version", "版本"),
+            PackExportOutput => ("Save to", "保存到"),
+            PackExportOutputPlaceholder => (
+                "empty = suggested path",
+                "留空 = 自动给一个路径"
+            ),
+            PackExportPrecheck => ("Dry run", "预检"),
+            PackExportConfirm => ("Write the pack", "确认写盘"),
+            PackExportAbort => ("Back", "返回"),
+            PackExportMultimcNote => (
+                "MultiMC/Prism can only be imported, not exported (by design).",
+                "MultiMC·Prism 只能导入、不能导出（有意省略）。"
+            ),
+            PackExportDone => ("Wrote {path} · {bytes}", "已写出 {path} · {bytes}"),
+            PackExportFailed => ("Export failed: {reason}", "导出失败：{reason}"),
+            PackExportPending => ("Scanning the instance…", "正在扫描实例…"),
+            PackPreviewHead => (
+                "Will inline {inline} files · cannot export: {skipped}",
+                "将内联 {inline} 个文件 · 无法导出 {skipped} 项"
+            ),
+            PackPreviewRemote => (
+                "{count} files can be referenced remotely",
+                "{count} 个文件可走远程引用"
+            ),
+            PackPreviewInlineBytes => (
+                "{bytes} copied into overrides/",
+                "{bytes} 会原样拷进 overrides/"
+            ),
+            PackPreviewInlineTitle => (
+                "Copied into overrides/ (first {shown}):",
+                "原样拷进 overrides/（只列前 {shown} 个）："
+            ),
+            PackPreviewSkippedTitle => (
+                "Not in the pack: {count}",
+                "没进包：{count} 项"
+            ),
+            PackPreviewNotes => ("Known losses", "已知损失"),
+            PackPreviewTarget => ("Will be written to {path}", "将写到 {path}"),
+            PackPreviewMore => (
+                "…and {count} more files (not shown here)",
+                "…还有 {count} 个文件（这里不展开）"
+            ),
+            PackPreviewComplete => ("Nothing is left out", "没有遗漏任何文件"),
+            PackPreviewIncomplete => (
+                "Some files will not be in the pack",
+                "有文件不会进包"
+            ),
+            PackReasonModrinthSha1 => ("Modrinth match (SHA-1)", "Modrinth 命中（SHA-1）"),
+            PackReasonCurseFingerprint => (
+                "CurseForge match (fingerprint)",
+                "CurseForge 命中（文件指纹）"
+            ),
+            PackReasonNoRemoteMatch => (
+                "unknown to both catalogs, inlined",
+                "两个目录都不认识，已内联"
+            ),
+            PackReasonCurseOnly => (
+                "only CurseForge knows it, this format cannot use it, inlined",
+                "只有 CF 认识，目标格式用不上，已内联"
+            ),
+            PackReasonModrinthOnly => (
+                "only Modrinth knows it, the CF manifest cannot use it, inlined",
+                "只有 Modrinth 认识，CF 清单用不上，已内联"
+            ),
+            PackReasonMissingSha512 => (
+                "the catalogue entry has no sha512 hash, inlined",
+                "命中缺 sha512，已内联"
+            ),
+            PackReasonMissingCurseIds => (
+                "the catalogue entry has no CurseForge ids, inlined",
+                "命中缺 projectID/fileID，已内联"
+            ),
+            PackReasonDisabled => (
+                "disabled file, this format cannot express it (.disabled kept)",
+                "禁用文件，目标格式表达不了（保留 .disabled）"
+            ),
+            PackReasonSymlink => ("symbolic link, skipped", "符号链接，已跳过"),
+            PackReasonUnsafePath => (
+                "path fails the pack path rules, skipped",
+                "路径过不了包内规整，已跳过"
+            ),
+            PackReasonUnreadable => ("cannot read it, skipped", "读不出来，已跳过"),
+            // --- M161：导入结果的两种失败**不许共用一句话** ---
+            // 「预检没通过（一个字节都没写）」与「写进去之后回滚完成」是两件事：
+            // 前者用户去修包/修配置再试，后者说明已经动过目标目录。此前两者共用
+            // `PackStatusFailed`（"Import failed — rolled back"），预检失败时那句话是假的。
+            PackStatusFailedNotStarted => (
+                "Import failed — nothing was written",
+                "导入失败 —— 还没写任何文件"
+            ),
+            PackStatusFailedIncomplete => (
+                "Import failed — rollback did not finish",
+                "导入失败 —— 回滚没做完"
+            ),
+            PackFatalTitleNotStarted => (
+                "Preflight failed — nothing was written",
+                "预检未通过 —— 一个字节都没写"
+            ),
+            PackFatalTitleIncomplete => (
+                "Rollback did not finish — the target folder may differ",
+                "回滚没做完 —— 目标目录可能与导入前不同"
+            ),
+        } }
+    };
+}
+
+pub(crate) use content_entries;

crates/i18n/src/catalog/core_text.rs

@@ -0,0 +1,15 @@
+//! core / presenter 只给了中文串、UI 又不许画原文时的兜底文案（口径见 [`crate::bridge`]）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! core_text_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── core / presenter 只给了中文串、UI 又不许画原文时的兜底（见 `bridge`）
+            CoreTextUntranslated => ("[system text not translated]", "［未翻译的系统文案］"),
+        } }
+    };
+}
+
+pub(crate) use core_text_entries;

crates/i18n/src/catalog/download.rs

@@ -0,0 +1,156 @@
+//! 版本管理页文案（M94 建页时叫「下载页」，M108 起显示名改成「版本管理」）。
+//!
+//! 一句话一个 key：带变量的句子用 `{name}`，页面只做 [`crate::Catalog::render`]，不拼片段
+//! （[`crate::bridge`] 的规矩 1）。
+//!
+//! 文案口径（M94 r1 / P2-2）：**只说这个页面真能做到的动作**（切分类、刷新、看日志），
+//! 不写「稍后会自动重试」这类 UI 没有的能力，也不拿文案去补功能。
+//!
+//! **「下载」字样不许再指向这一页**（M108 用户令）：这一页管的是「版本与加载器」，用户点它
+//! 不是为了下载点什么。唯一的例外是 [`Key::DownloadStageDownloading`]——那是安装流程里**真在
+//! 传文件**的那一步，说的不是页面身份而是当时的动作，留着才对（守门见 `pages/tests.rs` 的
+//! `the_download_route_is_presented_as_version_management`，它把本域每条 key 的两种语言都扫一遍）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! download_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // --- version management page (M94; renamed in M108) ---
+            DownloadTitle => ("Version management", "版本管理"),
+            // 例外说明（M108 复审 p3）：副标题承诺「安装、升级、修复」，但页面目前只有
+            // 「选版本 → 安装」一条路，「修复」与「加载器选择」都还没有入口
+            // （`InstallView::of` 连 `InstallProgressView.loader` 都没读）。
+            // 这是用户令（2026-11-04）定的口径，能力由 M105 / M113 补齐；
+            // 补齐之前不许拿这句话当已实现功能宣传。
+            DownloadSubtitle => (
+                "Manage versions and loaders: install, upgrade, repair",
+                "管理版本与加载器：安装、升级、修复"
+            ),
+            DownloadRefresh => ("Refresh", "刷新"),
+            DownloadInstall => ("Install", "安装"),
+            DownloadCancel => ("Cancel install", "取消安装"),
+            DownloadInstalled => ("Installed", "已安装"),
+            DownloadCount => ("{count} versions", "{count} 个版本"),
+            DownloadRowSupporting => ("{kind} · released {date}", "{kind} · 发布于 {date}"),
+            DownloadSelectHint => ("Pick a version, then install", "选一个版本再安装"),
+            DownloadLoading => ("Loading versions…", "正在加载版本列表…"),
+            DownloadLoadingHint => (
+                "If this stays here, press Refresh in the top right.",
+                "如果一直停在这里，点右上角的刷新。"
+            ),
+            DownloadEmptyTitle => ("No versions to show", "没有可显示的版本"),
+            DownloadEmptyBody => (
+                "Pick another category, or refresh the list.",
+                "换一个分类，或刷新一次列表。"
+            ),
+            DownloadCategoryAll => ("All", "全部"),
+            DownloadCategoryRelease => ("Release", "正式版"),
+            DownloadCategorySnapshot => ("Snapshot", "预览版"),
+            DownloadCategoryAncient => ("Ancient", "远古版"),
+            DownloadStagePlanning => ("Planning", "解析版本"),
+            DownloadStageDownloading => ("Downloading files", "下载文件"),
+            DownloadStageInstalling => ("Building the version", "生成版本"),
+            DownloadStageRegistering => ("Registering the instance", "登记实例"),
+            DownloadStageDone => ("Done", "已完成"),
+            DownloadStageFailed => ("Install failed", "安装失败"),
+            DownloadStageCancelled => ("Install cancelled", "安装已取消"),
+            DownloadProgress => (
+                "{done}/{total} files",
+                "{done}/{total} 文件"
+            ),
+            DownloadProgressUnknown => ("Waiting for the first file…", "等第一个文件…"),
+            // 速率与剩余时间是两个独立短语，各占一个 key（`DownloadRate` 只负责把它们排成一行）
+            DownloadRate => ("{speed} · {eta}", "{speed}，{eta}"),
+            DownloadEtaSecs => ("{secs}s left", "剩 {secs}s"),
+            DownloadEtaMins => ("{mins}m{secs}s left", "剩 {mins}m{secs}s"),
+            DownloadFailedHint => (
+                "The Logs page has the full reason.",
+                "完整原因在日志页。"
+            ),
+            DownloadOpenLogs => ("Open logs", "打开日志"),
+            DownloadDismiss => ("Dismiss", "关闭"),
+            // --- 安装选项（M105）---
+            DownloadOptionsTitle => ("Install options", "安装选项"),
+            DownloadOptionsLoaderVersion => ("Loader version", "加载器版本"),
+            DownloadOptionsLoaderVersionsLoading => (
+                "Fetching loader versions…",
+                "正在获取加载器版本…"
+            ),
+            DownloadOptionsLoaderVersionsFailed => (
+                "Could not fetch loader versions: {reason}",
+                "取不到加载器版本：{reason}"
+            ),
+            DownloadOptionsLoaderVersionsEmpty => (
+                "No loader builds published for {version}",
+                "官方没有为 {version} 发布加载器版本"
+            ),
+            DownloadOptionsInstanceName => ("Instance name", "实例名"),
+            DownloadOptionsInstanceNameHint => (
+                "Empty = use the version id",
+                "留空就用版本号"
+            ),
+            DownloadOptionsIncompatible => (
+                "{loader} has no builds for {version}",
+                "{loader} 没有适配 {version} 的构建"
+            ),
+            DownloadOptionsNeedsAtLeast => (
+                "{loader} needs Minecraft {min} or newer",
+                "{loader} 需要 Minecraft {min} 或更新"
+            ),
+            // M222：下载页只做「原版 + 加载器」一层，Forge 父链只有命令行能走。中性说明，
+            // 不是错误（不禁用确认键、不套错误色）——所以它不走 `problem` 那条通道。
+            DownloadOptionsLiteLoaderVanillaOnly => (
+                "Vanilla parent only — Forge goes through the CLI",
+                "只叠原版；叠 Forge 请走命令行"
+            ),
+            DownloadCancelled => (
+                "Install cancelled — finished files are kept, the instance was not created",
+                "安装已取消 —— 已下好的文件保留，实例未登记"
+            ),
+        } }
+    };
+}
+
+pub(crate) use download_entries;
+
+/// **M107 版本管理页**的侧栏 / 搜索文案。
+///
+/// 为什么单独一个宏、并**接在装配链最后**：`catalog/golden.rs` 是「`Key` 声明顺序 × 译文」的逐字节
+/// 快照，M107 的纪律是**只追加不重排**。把新 key 插在 `download_entries` 中间会让 `Key::ALL`
+/// 的顺序在 `DownloadDismiss` 与 `LogsSubtitleIdle` 之间断开，金表就得整体重排（那正是要避免的
+/// 风险）。追加在链尾 ⇒ 新 key 落在 `Key::ALL` 末尾 ⇒ 金表末尾追加同样几行即可。
+macro_rules! version_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // --- version management page (M107) ---
+            VersionRailTitle => ("Version type", "版本类型"),
+            VersionMajorTitle => ("Major version", "主版本"),
+            VersionMajorAll => ("All versions", "全部版本"),
+            VersionSearchPlaceholder => ("Search version numbers", "搜版本号"),
+            VersionSearchClear => ("Clear search", "清空搜索"),
+            VersionSearchHits => ("{count} matches", "{count} 个匹配"),
+            VersionSearchEmptyTitle => ("No matching versions", "没有匹配的版本"),
+            VersionSearchEmptyBody => (
+                "Try a shorter piece of the number — 1.21, 24w, a1.",
+                "试试更短的片段 — 1.21、24w、a1。"
+            ),
+            VersionSearchElsewhere => (
+                "{count} versions match, but they are in another type.",
+                "有 {count} 个版本匹配，但它们在别的类型里。"
+            ),
+            VersionSearchElsewhereAction => ("Show all types", "看全部类型"),
+            // --- M107 r2：复数口径与「在别处」的标题（追加在域尾 ⇒ `Key::ALL` 顺序只增不动） ---
+            VersionSearchHitsOne => ("1 match", "1 个匹配"),
+            VersionSearchElsewhereTitle => ("Found in another type", "在别的类型里找到了"),
+            VersionSearchElsewhereOne => (
+                "1 version matches, but it is in another type.",
+                "有 1 个版本匹配，但它在别的类型里。"
+            ),
+        } }
+    };
+}
+
+pub(crate) use version_entries;

crates/i18n/src/catalog/font.rs

@@ -0,0 +1,24 @@
+//! 中文字体文案（D28）：中文环境缺字体时的下载提示 / 失败回退。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! font_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 中文字体（D28：中文环境缺字体时的下载提示 / 失败回退）
+            FontCjkNeedsDownload => (
+                "No Chinese font found on this system. Download an open-source (OFL) Chinese font?",
+                "系统里没找到中文字体。要下载一套开源（OFL）中文字体吗？"
+            ),
+            FontCjkDownloading => ("Downloading Chinese font… {percent}%", "正在下载中文字体… {percent}%"),
+            FontCjkDownloadFailed => (
+                "Chinese font download failed; the interface stays in English.",
+                "中文字体下载失败，界面暂时保持英文。"
+            ),
+            FontCjkReady => ("Chinese font ready: {family}", "中文字体已就绪：{family}"),
+        } }
+    };
+}
+
+pub(crate) use font_entries;

crates/i18n/src/catalog/font_install.rs

@@ -0,0 +1,72 @@
+//! 中文字体**下载状态行**的文案（M168）：设置页 General 组那一行的四态文字 + 三类失败原因。
+//!
+//! ## 为什么单开一个域文件（而不是塞进 `font.rs`）
+//!
+//! `catalog/font.rs` 那四条（`FontCjkNeedsDownload` / `FontCjkDownloading` / `FontCjkDownloadFailed`
+//! / `FontCjkReady`）是 M92「只发信号」时代的文案，位置在装配链**中间**。往那个域后面追加会把
+//! 其后所有 key 在 `Key::ALL` 里整体平移一位 ⇒ 金表（逐 index 逐字节）整片红。
+//!
+//! 本域挂在**链尾**（`update_entries` 之后），于是 `Key::ALL` 的既有顺序一个不动，金表只需在
+//! 末尾追加（M104 / M106 / M107 / M109 / M114 / M159 都是这条做法）。
+//!
+//! ## 四条状态各一句话（tower 定死的口径）
+//!
+//! | 状态 | 文案说什么 |
+//! |---|---|
+//! | 下载中 | 「正在获取中文字体…（16.9 MB）」——**没有**假进度条，有真实量（字节数）才写 |
+//! | 完成 | 「中文字体已就绪：⟨族名⟩」（复用 `FontCjkReady`） |
+//! | 失败 | 「获取失败（⟨三类原因之一⟩）。界面照常可用，用的是系统字体；再切一次语言可以重试」 |
+//! | 无需下载 | 系统已有字体 / 当前语言不需要，两条分开说（对用户是两件事） |
+//!
+//! 「探测不出」也要有话说：那是「不知道」，既不是「没有」也不是「不需要」——写清楚「未下载」，
+//! 免得用户以为我们偷偷下过一份。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! font_install_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 中文字体下载状态行（M168：设置页 General 组）
+            FontCjkStatusLabel => ("Chinese font", "中文字体"),
+            FontCjkStatusNotNeeded => (
+                "Not needed for this interface language",
+                "当前界面语言不需要中文字体"
+            ),
+            FontCjkStatusSystem => ("Ready (system font: {family})", "已就绪（系统字体：{family}）"),
+            FontCjkStatusDownloading => (
+                "Fetching a Chinese font… ({size})",
+                "正在获取中文字体…（{size}）"
+            ),
+            FontCjkStatusFailed => (
+                "Download failed ({reason}). The interface keeps working with system fonts; switch the language again to retry.",
+                "获取失败（{reason}）。界面照常可用，用的是系统字体；再切一次语言可以重试。"
+            ),
+            // 超时也归这一档（M168 复审 P2-2）：用户要分清「太慢/没网」与「内容不对」，
+            // 但不需要知道我们内部把它叫 Timeout 还是 Network。
+            FontCjkReasonNetwork => (
+                "network unreachable or too slow (timed out)",
+                "网络不通或太慢（超时）"
+            ),
+            FontCjkReasonIntegrity => (
+                "the mirror sent content that failed verification",
+                "镜像内容校验不通过"
+            ),
+            FontCjkReasonDisk => ("cannot write to the data directory", "写不进数据目录"),
+            FontCjkStatusUnknown => (
+                "Not determined yet; nothing was downloaded",
+                "尚未判定；没有下载任何字体"
+            ),
+            FontCjkStatusUnprobeable => (
+                "System fonts cannot be probed, so nothing was downloaded",
+                "无法探测系统字体，因此没有下载"
+            ),
+            FontCjkStatusHint => (
+                "Downloaded once into the data directory and cached; the next start does not download it again. A mirror can be set with ui.font_cdn.",
+                "只下这一次，缓存在数据目录里，下次启动不重下。镜像可用配置键 ui.font_cdn 指定。"
+            ),
+        } }
+    };
+}
+
+pub(crate) use font_install_entries;

crates/i18n/src/catalog/general.rs

@@ -0,0 +1,65 @@
+//! 设置页 General 分组**真控件**的文案（M106 `I18NFOLLOW`）：语言选择器 + 其余三行。
+//!
+//! ## 与 `catalog/settings/general.rs` 的分工
+//!
+//! `catalog/settings/general.rs`（M99 建的）只有两条**标题**（[`SettingsLanguage`] /
+//! [`SettingsLanguageHint`]），是设置页五域装配的一部分；本文件是 M106 接真控件时新增的
+//! **选择器文案**：三档选项名、选中后的「界面当前使用」回显，以及 General 分组里另外三行
+//! （主题 / 启动页 / 关闭按钮）。
+//!
+//! 为什么要分两个文件：`catalog.rs` 的装配链是**追加**式的，新域挂在链尾就不会动到既有
+//! `Key` 的顺序（= `catalog/golden.rs` 那张逐字节金表）。两个文件同属 General 分组，读代码时
+//! 按「标题 vs 选项」区分即可；真要合并也是一个文件搬十行的活，不急着在接线的 mission 里做。
+//!
+//! ## 选项名为什么不是「语言自称」
+//!
+//! 常见做法是三档都写 `简体中文` / `English` 这样的自称。这里没有：`catalog/tests.rs` 有一条
+//! `chinese_catalog_is_actually_chinese`（英文表与中文表逐 key 必须不同），自称会让「中文表里
+//! 写着 English」被判成漏译。所以选项名**跟着界面语言走**：中文界面「跟随系统 / 简体中文 / 英文」，
+//! 英文界面 "Follow system / Chinese (Simplified) / English"——这也是多数启动器的做法。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! general_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── General 分组（语言选择器 + 其余三行）
+            SettingsLanguageFollowSystem => ("Follow system", "跟随系统"),
+            SettingsLanguageZhCn => ("Chinese (Simplified)", "简体中文"),
+            SettingsLanguageEn => ("English", "英文"),
+            SettingsLanguageEffective => ("Interface right now: {language}", "界面当前使用：{language}"),
+            SettingsTheme => ("Theme", "主题"),
+            SettingsThemeFollowSystem => ("Follow system", "跟随系统"),
+            // M229：主题三态改成「Ink / Silver / 跟随系统」——前两档就是两块品牌色板
+            // （Ink = 深色主方案 / Silver = 浅色主方案），落盘仍是 `appearance.theme_mode` 的
+            // `dark` / `light` / `auto` 三个值，不新增配置键。
+            SettingsThemeInk => ("Ink", "Ink（深色）"),
+            SettingsThemeSilver => ("Silver", "Silver（浅色）"),
+            SettingsThemeHint => (
+                "Ink is the dark scheme, Silver the light one. Follow system picks between them as Windows switches.",
+                "Ink 是深色主方案，Silver 是浅色主方案；跟随系统会随 Windows 的深浅在这两块之间切换。"
+            ),
+            SettingsStartupPage => ("Startup page", "启动页"),
+            SettingsStartupInstances => ("Instances", "实例"),
+            SettingsCloseButton => ("Close button", "关闭按钮"),
+            SettingsCloseToTray => ("Exit to tray", "退出到托盘"),
+            // 设置页页头（M106）：标题复用 `NavSettings`，这三条是副标题与两个动作。
+            SettingsSubtitle => ("Launcher behaviour, Java runtimes and download sources", "启动器行为、Java 运行时与下载源"),
+            SettingsResetSection => ("Reset section", "重置本组"),
+            SettingsSave => ("Save", "保存"),
+            // 第五条导航项（M106 给导航轨补的最后一条）。放在本域而不是 `catalog/nav.rs`：
+            // 金表按**位置**逐字节比，插进 nav 域会把既有 4 条导航行整体平移一位。
+            NavAi => ("Assistant", "助手"),
+            // 设置页左列的分组名（M106）。`Group.name` 是**id**（测试按它认组），显示名走这里。
+            SettingsGroupGeneral => ("General", "通用"),
+            SettingsGroupAppearance => ("Appearance", "外观"),
+            SettingsGroupJava => ("Java", "Java 运行时"),
+            SettingsGroupDownloads => ("Downloads", "下载"),
+            // `Route::Agent` 的回退卡正文（M106：`app/view.rs` 里最后一条硬编码英文）
+            AgentFallbackBody => ("The assistant page is not built yet. Chat lives in the docked panel once the AI mission lands; this screen is the M68 skeleton fallback.", "助手页还没做。AI 接线落地后对话会出现在右侧停靠面板；这一屏是 M68 的骨架回退。"),
+        } }
+    };
+}
+
+pub(super) use general_entries;

crates/i18n/src/catalog/golden.rs

@@ -0,0 +1,185 @@
+//! 金表的**表数据**（`Key::ALL` 顺序 × (en, zh-CN) 逐字快照，第一列是 `Key::name()`）。「为什么
+//! 有这张表、它抓得住什么」全在 `catalog.rs` 的 `mod golden;` 里；本文件只放数据。
+pub(super) const GOLDEN: &[(&str, &str, &str)] = &[
+    ("NavInstances", "Instances", "实例"),
+    ("NavDownload", "Versions", "版本管理"),
+    ("NavDownloadExpanded", "Version management", "版本管理"),
+    ("NavLogs", "Logs", "日志"),
+    ("NavSettings", "Settings", "设置"),
+    ("InstancesNew", "New instance", "新建实例"),
+    ("InstancesImport", "Import", "导入"),
+    ("InstancesBack", "Back to instances", "返回实例列表"),
+    ("InstancesPlay", "Play", "启动"),
+    ("InstancesEmptyTitle", "No instance selected", "未选择实例"),
+    ("InstancesEmptyBody", "Pick an instance on the left to see its version, loader and launch options.", "在左侧选择一个实例，查看它的版本、加载器与启动选项。"),
+    ("InstancesTitle", "Instances", "实例"),
+    ("InstancesSubtitle", "Local versions and their mod loaders", "本地版本与它们的模组加载器"),
+    ("InstancesAllTitle", "ALL INSTANCES", "全部实例"),
+    ("InstancesStop", "Stop", "停止"),
+    ("InstancesDuplicate", "Duplicate", "复制"),
+    ("InstancesOpenFolder", "Open folder", "打开文件夹"),
+    ("InstancesDelete", "Delete", "删除"),
+    ("InstancesNarrowNote", "Below 840 px the list and the detail share one column, so opening an instance replaces this screen (full-page switch). Widen the window to see both panes again.", "窗口窄于 840 像素时，列表与详情共用一列：打开一个实例会整页替换这一屏（整页切换）。把窗口拉宽就能重新同时看见两栏。"),
+    ("InstancesMetaVersion", "VERSION", "版本"),
+    ("InstancesMetaLoader", "LOADER", "加载器"),
+    ("InstancesMetaMemory", "MEMORY", "内存"),
+    ("InstancesMetaJava", "JAVA", "Java"),
+    ("InstancesMetaMods", "MODS", "模组"),
+    ("InstancesMetaIsolation", "ISOLATION", "隔离方式"),
+    ("InstancesMetaVersionId", "VERSION ID", "版本标识"),
+    ("InstancesMetaFiles", "FILES", "文件"),
+    ("InstancesMetaLastPlayed", "LAST PLAYED", "上次游玩"),
+    ("InstancesPresentOnDisk", "Present on disk", "已在磁盘上"),
+    ("InstancesMissing", "Missing", "缺失"),
+    ("InstancesNeverPlayed", "Never", "从未游玩"),
+    ("InstancesIsolationIsolated", "Isolated", "独立目录"),
+    ("InstancesIsolationShared", "Shared", "共用目录"),
+    ("InstancesRunning", "Running · pid {pid}", "运行中 · pid {pid}"),
+    ("InstancesFailed", "Launch failed · {reason}", "启动失败 · {reason}"),
+    ("InstancesCrashed", "the game crashed (exit {code})", "游戏崩溃（退出码 {code}）"),
+    ("InstancesSilentFailed", "exit 0, but never started", "退出码 0，没起来"),
+    ("InstancesStageDownload", "Downloading", "下载中"),
+    ("InstancesStageVerify", "Verifying", "校验中"),
+    ("InstancesStageLaunch", "Starting", "启动中"),
+    ("InstancesStageWindow", "Waiting for window", "等待游戏窗口"),
+    ("InstancesLaunchTitle", "LAUNCH OPTIONS", "启动参数"),
+    ("InstancesLaunchJvm", "JVM arguments", "JVM 参数"),
+    ("InstancesLaunchJvmHint", "Space separated, quotes allowed. Empty = follow the global extra JVM arguments (both are sent; on duplicates the instance wins).", "空格分隔、支持引号。留空 = 跟随全局附加 JVM 参数（两者叠加下发，同名选项实例赢）。"),
+    ("InstancesLaunchGame", "Game arguments", "游戏参数"),
+    ("InstancesLaunchGameHint", "Appended last, so they override earlier game arguments. Empty = nothing appended.", "追加在命令行最后，可覆盖前面的游戏参数。留空 = 不追加。"),
+    ("InstancesLaunchMemory", "Max memory (MiB)", "最大内存（MiB）"),
+    ("InstancesLaunchMemoryHint", "Empty = follow the global default ({default} MiB).", "留空 = 跟随全局默认（{default} MiB）。"),
+    ("InstancesLaunchJava", "Java executable", "Java 可执行文件"),
+    ("InstancesLaunchJavaHint", "Empty = follow the global setting, then auto-pick (managed > JAVA_HOME > PATH).", "留空 = 跟随全局设置，再退到自动挑选（托管 > 环境变量 > 系统路径）。"),
+    ("InstancesLaunchBackend", "Graphics backend", "图形后端"),
+    ("InstancesLaunchBackendGated", "Requires MC {min}+ (this instance: {version}). The flag is not sent on this version.", "需游戏版本 {min} 及以上（本实例 {version}），这个版本不会下发该参数。"),
+    ("InstancesLaunchEffective", "Effective: {value}", "生效：{value}"),
+    ("InstancesBackendDefault", "Default", "默认"),
+    ("InstancesBackendOpengl", "OpenGL", "OpenGL 后端"),
+    ("InstancesBackendVulkan", "Vulkan", "Vulkan 后端"),
+    ("InstancesLaunchSave", "Save", "保存"),
+    ("InstancesLaunchReset", "Reset to global", "恢复跟随全局"),
+    ("AdoptTitle", "Import an existing version", "导入已有版本"),
+    ("AdoptSubtitle", "Register versions another launcher already installed. Nothing is copied: versions, libraries and assets stay where they are.", "把别的启动器已经装好的版本登记成实例。不复制任何东西：versions / libraries / assets 原地不动。"),
+    ("AdoptScanning", "Scanning versions/…", "正在扫描 versions/…"),
+    ("AdoptEmpty", "No version found under {dir}. Install one here, or point the game folder at the .minecraft another launcher uses.", "在 {dir} 下一个版本都没找到。可以用本启动器装一个，或者把游戏目录指向别的启动器用的那个 .minecraft。"),
+    ("AdoptSelectLabel", "Pick a version", "选择版本"),
+    ("AdoptReady", "Ready", "可导入"),
+    ("AdoptBlocked", "{count} problem(s)", "{count} 个问题"),
+    ("AdoptRegistered", "Already used by {name}", "已被 {name} 使用"),
+    ("AdoptTargetLabel", "Where should the game run?", "游戏在哪个目录里跑"),
+    ("AdoptTargetInstanceDir", "New folder in ULL data (default)", "ULL 数据区新建目录（缺省）"),
+    ("AdoptTargetInstanceDirHint", "mods, saves and config stay out of the other launcher's .minecraft", "mods / saves / config 不会落进别人的 .minecraft"),
+    ("AdoptTargetShared", "Share the game folder", "共用游戏目录"),
+    ("AdoptTargetSharedHint", "mods, saves and config are written into the other launcher's .minecraft", "mods / saves / config 会写进别人的 .minecraft"),
+    ("AdoptTargetVersionDir", "Use the version folder", "用版本目录"),
+    ("AdoptTargetVersionDirHint", "player data grows inside versions/<id>", "玩家数据会长在 versions/<id> 里"),
+    ("AdoptNameLabel", "Instance name (empty = version id)", "实例名（留空 = 版本 id）"),
+    ("AdoptPreview", "Check", "预检"),
+    ("AdoptConfirm", "Import", "导入"),
+    ("AdoptBack", "Back", "返回"),
+    ("AdoptClose", "Close", "关闭"),
+    ("AdoptPlanTitle", "Ready to import", "可以导入"),
+    ("AdoptPlanRunDir", "Game folder", "运行目录"),
+    ("AdoptPlanIsolation", "Isolation", "隔离方式"),
+    ("AdoptFailureTitle", "Import failed", "导入失败"),
+    ("AdoptProblemCount", "Every reason is listed below:", "全部原因如下："),
+    ("AdoptInstanceName", "Instance name", "实例名"),
+    ("AdoptDoneTitle", "Imported", "已导入"),
+    ("AdoptDoneHint", "It is in the instance list now. Player data will live in the game folder below.", "它已经出现在实例列表里；玩家数据会落在下面这个运行目录。"),
+    ("InstancesModsTitle", "MODS", "模组"),
+    ("InstancesModsCount", "{enabled} enabled · {disabled} disabled", "{enabled} 启用 · {disabled} 禁用"),
+    ("InstancesModsLoading", "Reading mods/…", "正在读取 mods/…"),
+    ("InstancesModsEmpty", "No mods here yet — put jars into mods/ and they show up.", "这里还没有模组——把模组文件放进 mods/ 就会出现在这里。"),
+    ("InstancesModsMissingDir", "This instance has no mods/ directory yet.", "这个实例还没有 mods/ 目录。"),
+    ("InstancesModsRunning", "The game is running — toggles are read-only until it exits.", "游戏正在运行——退出前开关只读。"),
+    ("InstancesModsOldBadge", "legacy file", "旧版本残留"),
+    ("InstancesModsSkipped", "{count} entries skipped", "跳过 {count} 项"),
+    ("InstancesModsFailed", "Could not read mods/: {reason}", "读取 mods/ 失败：{reason}"),
+    ("InstancesModsToggleFailed", "Could not toggle {file}: {reason}", "启停 {file} 失败：{reason}"),
+    ("InstancesModsReasonRunning", "the game is running", "游戏正在运行"),
+    ("InstancesModsReasonInstance", "the instance is gone", "实例已不存在"),
+    ("InstancesModsReasonName", "the file name is not usable", "文件名不可用"),
+    ("InstancesModsReasonDirectory", "there is no usable mods/ directory", "没有可用的 mods/ 目录"),
+    ("InstancesModsReasonMissing", "the file is gone", "文件已不在"),
+    ("InstancesModsReasonNotFile", "that is not a regular file", "那不是普通文件"),
+    ("InstancesModsReasonCollision", "a file with that name already exists", "同名文件已存在"),
+    ("InstancesModsReasonRename", "the rename failed", "改名失败"),
+    ("InstancesSavesTitle", "SAVES", "存档"),
+    ("InstancesSavesCount", "{worlds} worlds · {shots} screenshots", "{worlds} 个世界 · {shots} 张截图"),
+    ("InstancesSavesLoading", "Reading saves/…", "正在读取 saves/…"),
+    ("InstancesSavesEmpty", "No worlds or screenshots yet — play once and they show up here.", "还没有世界或截图——玩一次就会出现在这里。"),
+    ("InstancesSavesMissingDir", "This instance has no saves/ or screenshots/ directory yet.", "这个实例还没有 saves/ 或 screenshots/ 目录。"),
+    ("InstancesSavesWorlds", "WORLDS", "世界"),
+    ("InstancesSavesScreenshots", "SCREENSHOTS", "截图"),
+    ("InstancesSavesNoWorlds", "No worlds yet.", "还没有世界。"),
+    ("InstancesSavesNoScreenshots", "No screenshots yet.", "还没有截图。"),
+    ("InstancesSavesWorldIcon", "has icon", "有图标"),
+    ("InstancesSavesTimeUnknown", "time unknown", "时间未知"),
+    ("InstancesSavesSkipped", "{count} entries skipped", "跳过 {count} 项"),
+    ("InstancesSavesOpenFolder", "Open saves folder", "打开存档文件夹"),
+    ("InstancesSavesRetry", "Retry", "重试"),
+    ("InstancesSavesFailed", "Could not read saves/: {reason}", "读取 saves/ 失败：{reason}"),
+    ("InstancesSavesOpenFailed", "Could not open the folder: {reason}", "打开文件夹失败：{reason}"),
+    ("InstancesSavesReasonDir", "the directory is not usable", "目录不可用"),
+    ("InstancesSavesReasonInstance", "the instance is gone", "实例已不存在"),
+    ("InstancesSavesReasonOpen", "the file manager did not start", "文件管理器没起来"),
+    ("InstancesSavesRename", "Rename", "重命名"),
+    ("InstancesSavesBackup", "Back up", "备份"),
+    ("InstancesSavesDelete", "Delete", "删除"),
+    ("InstancesSavesRenamePlaceholder", "New name for this world", "这个世界的新名字"),
+    ("InstancesSavesRenameConfirm", "Rename", "改名"),
+    ("InstancesSavesCancel", "Cancel", "取消"),
+    ("InstancesSavesBusy", "Working…", "正在处理…"),
+    ("InstancesSavesDeleteTitle", "Delete this world?", "删除这个世界？"),
+    ("InstancesSavesDeleteBody", "{dir} and everything inside it will be deleted. This cannot be undone.", "{dir} 和它里面的全部内容都会被删除，且不能撤销。"),
+    ("InstancesSavesDeleteConfirm", "Delete world", "删除世界"),
+    ("InstancesSavesRenamed", "Renamed {from} → {to}.", "已把 {from} 改名为 {to}。"),
+    ("InstancesSavesDeleted", "Deleted {dir}.", "已删除 {dir}。"),
+    ("InstancesSavesBackedUp", "Backed up {dir} to {path} ({size}).", "已把 {dir} 备份到 {path}（{size}）。"),
+    ("InstancesSavesBackupSkipped", "{count} symlinks skipped", "跳过 {count} 个符号链接"),
+    ("InstancesSavesRenameFailed", "Could not rename {file}: {reason}", "重命名 {file} 失败：{reason}"),
+    ("InstancesSavesDeleteFailed", "Could not delete {file}: {reason}", "删除 {file} 失败：{reason}"),
+    ("InstancesSavesBackupFailed", "Could not back up {file}: {reason}", "备份 {file} 失败：{reason}"),
+    ("InstancesSavesReasonUnsafeName", "the name is not usable", "名字不可用"),
+    ("InstancesSavesReasonSymlink", "that path is a symbolic link (not followed)", "那个路径是符号链接（不跟随）"),
+    ("InstancesSavesReasonMissing", "the world is gone", "那个世界已不在"),
+    ("InstancesSavesReasonNotDir", "that is not a directory", "那不是目录"),
+    ("InstancesSavesReasonConflict", "a world with that name already exists", "同名世界已存在"),
+    ("InstancesSavesReasonBoundary", "that path is outside saves/", "那个路径落在 saves/ 之外"),
+    ("InstancesSavesReasonTooLarge", "the world is too large for one zip", "这个世界太大，一个 zip 装不下"),
+    ("InstancesSavesReasonWrite", "the write failed", "写盘失败"),
+    ("InstancesSavesReasonRunning", "the game is running (exit it first)", "游戏正在运行（先退出再操作）"),
+    ("InstancesSavesPreviewNone", "no preview", "未生成预览"),
+    ("InstancesSavesPreviewTooLarge", "too large for a preview (over 8 MiB)", "文件过大，未生成预览（超过 8 MiB）"),
+    ("InstancesSavesPreviewUnreadable", "the file could not be read", "读不出这张图"),
+    ("InstancesSavesPreviewDecode", "not a decodable image", "解不出这张图（可能已损坏或格式不支持）"),
+];
+
+/// 金表的**全量**行（本文件 → [`tail`] → [`tail_ai`] → [`tail2`]，顺序即 `Key::ALL`）。
+///
+/// 拆成四段只为守 400 行硬线（M157/M159/M197 往金表追加文案后越线）；对调用方是**一条**序列，
+/// `catalog/tests.rs` 的逐字节断言不用关心分段。
+///
+/// ⚠️ 加段时**必须**在这里也 chain 上：条数与内容都只能从这一条序列导出（见 [`len`]）。
+pub(super) fn rows() -> impl Iterator<Item = &'static (&'static str, &'static str, &'static str)> {
+    GOLDEN
+        .iter()
+        .chain(tail::ROWS.iter())
+        .chain(tail_ai::ROWS.iter())
+        .chain(tail2::ROWS.iter())
+}
+
+/// 金表总行数（`Key::ALL` 的条数）。
+///
+/// **定义成 `rows().count()`，不是各段 `len()` 相加**：r3 复审实测过一条假绿——把
+/// [`rows`] 里的 `chain(tail2::ROWS)` 删掉，`catalog/tests.rs` 仍全绿，因为条数来自一处手工
+/// 聚合（仍有 tail2）而内容只遍历 `rows()`（少了 tail2），于是 213/459 行无人看守。
+/// 现在条数与内容同源：漏挂一段 ⇒ 条数当场对不上 ⇒ 用例必红。
+pub(super) fn len() -> usize {
+    rows().count()
+}
+
+mod tail;
+mod tail2;
+mod tail_ai;

crates/i18n/src/catalog/golden/tail.rs

@@ -0,0 +1,214 @@
+//! 金表的**后半段的前半截**（`InstancesLaunchReset` 之后、到 M197 的 Java 域结束）。
+//!
+//! 为什么拆：`golden.rs` 在 M157 加了 19 行启动参数文案后到 416 行，越过 400 行硬线；
+//! 拆分口径与仓库其它 `-p1/-p2` 一致——**纯搬移、一行不改**，顺序即 `Key::ALL` 的后半段。
+//! 拼装与断言在 `golden.rs` 的 [`rows`] 与 `catalog/tests.rs`。
+//!
+//! **M197 起本段只到 Java 域结束**：M197 往 `settings_java_entries` 追加了 68 行，加上 dev 侧
+//! 其它 mission 后加的行会涨到 470+（越过 400 行硬线），于是把 **M174 助手域起的那半截**
+//! 纯搬移到 [`super::tail_ai`]（链序：`golden` → `tail` → `tail_ai` → `tail2`）。
+//! 搬移只改位置：其余每一行逐字节原样（含其它 mission 后加的行）。
+pub(super) const ROWS: &[(&str, &str, &str)] = &[
+    ("LoaderVanilla", "Vanilla", "原版"),
+    ("LaunchOutcomeNormal", "Finished normally", "正常结束"),
+    ("LaunchOutcomeCrash", "The game crashed", "游戏崩溃"),
+    ("LaunchOutcomeSilent", "Suspected silent failure: exit code 0, but the game never really started", "疑似静默失败：退出码 0，但游戏没真正跑起来"),
+    ("LaunchFailedWithCode", "Launch failed (exit {code}): {reason}", "启动失败（退出码 {code}）：{reason}"),
+    ("LaunchStageVersionManifest", "Reading the version file", "读版本文件"),
+    ("LaunchStageInheritance", "Resolving the inheritance chain", "解析继承链"),
+    ("LaunchStageInstanceConfig", "Reading the instance settings", "读实例设置"),
+    ("LaunchStageIsolation", "Preparing the isolated game folder", "准备隔离游戏目录"),
+    ("LaunchStageIdentity", "Preparing the account", "准备账户"),
+    ("LaunchStageSpawn", "Starting the game process", "启动游戏进程"),
+    ("LaunchStageFailed", "Launch failed · {stage}: {detail}", "启动失败 · {stage}：{detail}"),
+    ("LaunchToastEnded", "{outcome} · {seconds}s", "{outcome} · {seconds} 秒"),
+    ("LaunchMsaNotConfigured", "Microsoft sign-in is not configured: it needs an Azure public client id (the login flow itself is implemented). Build with ULL_MSA_CLIENT_ID=<id>, or set that environment variable before launching.", "微软登录未配置：缺少 Azure 公共客户端 id（登录功能已实现，只差这一项配置）。构建时注入：ULL_MSA_CLIENT_ID=<id> cargo build；或启动前设置同名环境变量 ULL_MSA_CLIENT_ID=<id>。"),
+    ("FontCjkNeedsDownload", "No Chinese font found on this system. Download an open-source (OFL) Chinese font?", "系统里没找到中文字体。要下载一套开源（OFL）中文字体吗？"),
+    ("FontCjkDownloading", "Downloading Chinese font… {percent}%", "正在下载中文字体… {percent}%"),
+    ("FontCjkDownloadFailed", "Chinese font download failed; the interface stays in English.", "中文字体下载失败，界面暂时保持英文。"),
+    ("FontCjkReady", "Chinese font ready: {family}", "中文字体已就绪：{family}"),
+    ("SettingsLanguage", "Language", "界面语言"),
+    ("SettingsLanguageHint", "Switches the interface language. Chinese text needs a Chinese font.", "切换界面语言。显示中文需要中文字体。"),
+    ("SettingsLogsFolder", "Log folder", "日志文件夹"),
+    ("SettingsLogsFolderHint", "What explains a crash lives here: the launcher's own runtime log (launcher.log, rolled over at 1 MiB with one old copy kept) and one jsonl per game session under logs/game/. Sessions from older versions (data/agent/sessions) are still read, not moved.", "解释一次崩溃要看的东西都在这：启动器自己的运行日志（launcher.log，满 1 MiB 滚动一次、只留一份旧档）与每次游戏会话的 jsonl（logs/game/）。旧版本留下的会话（data/agent/sessions）仍然读得出来，不会被搬动。"),
+    ("SettingsLogsCopy", "Copy path", "复制路径"),
+    ("SettingsLogsUnknown", "Data directory not resolved — restart the launcher from its own folder", "数据根没解析出来——从启动器所在目录重新启动试试"),
+    ("SettingsAppearanceCorner", "Window corners", "窗口圆角"),
+    ("SettingsAppearanceCornerSystem", "Follow system", "跟随系统"),
+    ("SettingsAppearanceCornerSquare", "Square", "直角"),
+    ("SettingsAppearanceCornerHint", "On Windows 11 and Server 2025 we ask the system for rounded corners; Windows 10 keeps square corners. On macOS and Linux the desktop's own rules apply. We never draw corners ourselves.", "Windows 11 与 Windows Server 2025 上我们请求系统处理外框圆角；Windows 10 保持直角；macOS 与 Linux 交给桌面合成器自己的规则；我们不自己画圆角。"),
+    ("SettingsAppearanceCornerSuspended", "Not in effect right now: window transparency is below 100%. Setting it back to 100% restores the rounded corners.", "当前因整窗透明度不生效：把整窗透明度调回 100% 圆角即恢复。"),
+    // M180：外观分组补齐（`catalog/settings/appearance.rs` 的第二批，M116 圆角那 5 条之后）。
+    // 位置就是装配链里那个域的位置——`settings_appearance_entries` 在 `settings_java_entries` 之前，
+    // 所以这 40 行必须落在 `SettingsAppearanceCornerSuspended` 与 `SettingsJavaScan` 之间
+    // （顺序 = `Key::ALL`；为排到文件尾而重排别人的族会让 `split_keeps_every_translation` 整片红）。
+    ("SettingsAppearanceWindowOpacity", "Window transparency", "整窗透明度"),
+    ("SettingsAppearanceWindowOpacityHint", "Applies to the whole window. Floor {floor}; 1.00 = fully opaque.", "作用于整个窗口。下限 {floor}；1.00 = 完全不透明。"),
+    ("SettingsAppearancePanelOpacity", "Panel transparency", "面板透明度"),
+    ("SettingsAppearancePanelOpacityHint", "Only the panel/card layer. Floor {floor}; independent of window transparency.", "只作用于面板 / 卡片这一层。下限 {floor}；与整窗透明度互不影响。"),
+    ("SettingsAppearancePanelOpacityForcedValue", "100% (forced from {requested})", "100%（强制，原请求值 {requested}）"),
+    ("SettingsAppearancePanelOpacityForcedHint", "Software renderer: panels and glass stay fully opaque (window transparency still works).", "软件渲染：面板与玻璃效果恒为不透明（整窗透明度仍然有效）。"),
+    ("SettingsAppearanceBackgroundImage", "Background image", "背景图"),
+    ("SettingsAppearanceOff", "Off", "关"),
+    ("SettingsAppearanceOn", "On", "开"),
+    ("SettingsAppearanceImagePath", "Image path", "图片路径"),
+    ("SettingsAppearancePaletteLevel", "Colours: {level}", "配色：{level}"),
+    ("SettingsAppearanceBgFill", "Fill", "填充方式"),
+    ("SettingsAppearanceBgFillCover", "Cover", "铺满"),
+    ("SettingsAppearanceBgFillContain", "Contain", "完整显示"),
+    ("SettingsAppearanceBgFillTile", "Tile", "平铺"),
+    ("SettingsAppearanceBgDim", "Dim", "暗化"),
+    ("SettingsAppearanceBgDimHint", "Blends the image toward the panel colour so text stays readable. Max {max}.", "把背景图往面板底色上退，让文字读得清。上限 {max}。"),
+    ("SettingsAppearancePaletteSource", "Colour source", "配色来源"),
+    ("SettingsAppearancePaletteBackground", "Background", "取自背景图"),
+    ("SettingsAppearancePaletteWallpaper", "Wallpaper", "取自壁纸"),
+    ("SettingsAppearancePalettePreset", "Preset", "内置色卡"),
+    ("SettingsAppearanceBgReadFailed", "Background image could not be read: {reason}", "背景图读不出来：{reason}"),
+    ("SettingsAppearanceBgDecodeFailed", "Background image could not be decoded ({reason}; this build decodes PNG, JPEG and BMP)", "背景图解不开（{reason}；这个构建只支持 PNG、JPEG 与 BMP）"),
+    ("SettingsAppearanceBgTooLarge", "Background image is too large to decode: {width}×{height} (limit {limit} px per edge)", "背景图太大，解不开：{width}×{height}（每边上限 {limit} 像素）"),
+    ("SettingsAppearanceBgSmallTile", "Small image ({width}×{height}): tiles are scaled up so the window stays covered (max {max} tiles, no gaps).", "图片很小（{width}×{height}）：图块会被放大，保证窗口铺满（最多 {max} 块，不留缝）。"),
+    ("SettingsAppearancePaletteBgUndecodable", "Background image could not be read; colours fall back.", "背景图读不出来，配色回落到下一级。"),
+    ("SettingsAppearancePaletteBgTooSmall", "Background image is too small to sample; colours fall back.", "背景图太小，取不了色，配色回落到下一级。"),
+    ("SettingsAppearancePaletteBgBadDimensions", "Background image data looks inconsistent; colours fall back.", "背景图数据前后不一致，配色回落到下一级。"),
+    ("SettingsAppearancePaletteBgNoOpaquePixels", "Background image is almost fully transparent; colours fall back.", "背景图几乎全透明，配色回落到下一级。"),
+    ("SettingsAppearancePaletteBgLowChroma", "Background image is too monochrome to tint from; colours fall back.", "背景图太单调（彩度不足），取不出配色，回落到下一级。"),
+    ("SettingsAppearancePaletteBgContrast", "Background image colours would be unreadable; colours fall back.", "按背景图取的颜色读不清，配色回落到下一级。"),
+    ("SettingsAppearancePaletteWallpaperUndecodable", "Desktop wallpaper could not be read.", "桌面壁纸读不出来。"),
+    ("SettingsAppearancePaletteWallpaperTooSmall", "Desktop wallpaper is too small to sample.", "桌面壁纸太小，取不了色。"),
+    ("SettingsAppearancePaletteWallpaperBadDimensions", "Desktop wallpaper data looks inconsistent.", "桌面壁纸数据前后不一致。"),
+    ("SettingsAppearancePaletteWallpaperNoOpaquePixels", "Desktop wallpaper is almost fully transparent.", "桌面壁纸几乎全透明。"),
+    ("SettingsAppearancePaletteWallpaperLowChroma", "Desktop wallpaper is too monochrome to tint from.", "桌面壁纸太单调（彩度不足），取不出配色。"),
+    ("SettingsAppearancePaletteWallpaperContrast", "Desktop wallpaper colours would be unreadable; colours fall back.", "按桌面壁纸取的颜色读不清，配色回落到下一级。"),
+    ("SettingsAppearancePalettePresetContrast", "The built-in card needed a small contrast correction.", "内置色卡做了一点对比度修正。"),
+    ("SettingsAppearancePaletteAdjusted", "A few colours were nudged for readability.", "有几个颜色为了可读性做了微调。"),
+    // M175：设置页「Java」分组（`catalog/settings/java.rs` 的 `settings_java_entries`）。
+    // 位置就是装配链里那个域的位置：`settings_java_entries` 在 `settings_appearance_entries` 之后、
+    // `settings_download_entries`（空）与 `settings_ai_entries`（M174）之前，所以这几行必须落在
+    // `SettingsAppearanceCornerSuspended` 与 `SettingsGroupAssistant` 之间（顺序 = `Key::ALL`）。
+    ("SettingsJavaScan", "Scan now", "立即扫描"),
+    ("SettingsJavaScanningStart", "Scanning…", "正在扫描…"),
+    ("SettingsJavaScanning", "Scanning… {done}/{total}", "正在扫描… {done}/{total}"),
+    ("SettingsJavaCancelling", "Cancelling…", "正在取消…"),
+    ("SettingsJavaCancel", "Cancel", "取消"),
+    ("SettingsJavaCancelled", "The scan was cancelled; the list below is from the previous run.", "扫描已取消；下面的列表还是上一次的结果。"),
+    ("SettingsJavaScanDone", "{count} JDK found", "找到 {count} 个 JDK"),
+    ("SettingsJavaNeverScanned", "Not scanned yet", "还没扫描过"),
+    ("SettingsJavaNeverScannedBody", "The list is still empty. The launcher scans once by itself when the settings page opens; press Scan now to look again right away.", "列表还是空的。打开设置页时启动器会自己扫一次；也可以点「立即扫描」立刻再扫一遍。"),
+    ("SettingsJavaEmptyTitle", "No Java runtime found", "未检测到 Java 运行时"),
+    ("SettingsJavaEmptyBody", "Nothing matched. Add the path of a JDK you already unpacked below, or install one with ull java install 21 on the command line.", "没找到任何 JDK。可以在下面手动加上你自己解压的那份，或者用命令行 ull java install 21 装一个。"),
+    ("SettingsJavaDefault", "Default", "默认"),
+    ("SettingsJavaSetDefault", "Use as default", "设为默认"),
+    ("SettingsJavaFits", "Meets the current instance requirement", "满足当前实例的要求"),
+    ("SettingsJavaTooOld", "Below the requirement: this instance needs Java {minimum}+", "低于要求：当前实例需要 Java {minimum} 及以上"),
+    ("SettingsJavaDefaultSet", "Default JDK is now {path}", "默认 JDK 已设为 {path}"),
+    ("SettingsJavaSourceManaged", "installed by this launcher", "本启动器安装"),
+    ("SettingsJavaSourceEnv", "JAVA_HOME (environment variable)", "JAVA_HOME（环境变量）"),
+    ("SettingsJavaSourcePath", "on PATH", "PATH 上"),
+    ("SettingsJavaSourceSystem", "system install", "系统安装"),
+    ("SettingsJavaSourceManual", "added by you", "手动添加"),
+    ("SettingsJavaAdd", "Add a JDK path", "手动添加 JDK 路径"),
+    ("SettingsJavaAddPlaceholder", "C:\\Program Files\\Java\\jdk-21", "例：C:\\Program Files\\Java\\jdk-21"),
+    ("SettingsJavaAddHint", "A JDK folder or its java executable. We run java -version on it; anything that cannot answer is refused.", "JDK 目录或它的 java 可执行文件。会真跑一次 java -version；答不出话的一律拒绝。"),
+    ("SettingsJavaAddAction", "Add", "添加"),
+    ("SettingsJavaAdded", "Added {path}", "已添加 {path}"),
+    ("SettingsJavaMemory", "Default memory (MB)", "默认内存（MB）"),
+    ("SettingsJavaMemoryHint", "Whole megabytes, {min}–{max}. Instances without their own override follow this value.", "整数 MB，范围 {min}~{max}。没有实例级覆盖的实例都用它。"),
+    ("SettingsJavaLayerGlobal", "In effect: {mb} MB, from the global default.", "生效：{mb} MB，来自全局默认值。"),
+    ("SettingsJavaLayerInstance", "In effect: {mb} MB, set by instance {instance}. Changing the global value below will not affect that instance.", "生效：{mb} MB，由实例 {instance} 覆盖。改下面的全局值不会影响它。"),
+    ("SettingsJavaJvm", "Extra JVM arguments", "额外 JVM 参数"),
+    ("SettingsJavaJvmPlaceholder", "-XX:+UseG1GC -Dfile.encoding=UTF-8", "例：-XX:+UseG1GC -Dfile.encoding=UTF-8"),
+    ("SettingsJavaJvmHint", "Separated by spaces, quotes allowed. Appended to the command line of every launch; an instance's own JVM arguments come after it.", "按空白分隔，支持引号。会拼到每次启动的命令行上；实例自己的 JVM 参数排在它后面。"),
+    ("SettingsJavaJvmSaved", "Saved value: {value}", "已保存的值：{value}"),
+    ("SettingsJavaJvmSavedNone", "No extra JVM arguments are saved yet.", "还没有保存任何额外参数。"),
+    ("SettingsJavaSave", "Save", "保存"),
+    ("SettingsJavaSaved", "Saved and read back from disk. The next launch uses the new value.", "已保存，并从磁盘读回确认。下次启动就用新值。"),
+    ("SettingsJavaUnsaved", "There are unsaved changes.", "有未保存的改动。"),
+    ("SettingsJavaRefused", "Not saved: {reason}", "未保存：{reason}"),
+    ("SettingsJavaSkipNotDirty", "there was nothing to change, so no file was written", "没有任何改动，因此没有写文件"),
+    ("SettingsJavaSkipReadOnly", "the settings file is read-only: a newer launcher wrote it, or it is marked untrusted", "配置文件只读：它被更新版本的启动器写过，或被标记为不可信"),
+    ("SettingsJavaSkipUnreadable", "the settings file is untrusted, so it is treated as read-only", "配置文件不可信，因此按只读处理"),
+    ("SettingsJavaNoStorage", "No settings file is available in this run, so nothing can be scanned or saved.", "这一次运行没有可用的设置文件，扫描与保存都做不了。"),
+    ("SettingsJavaReasonMemoryEmpty", "the memory field is empty", "内存没填"),
+    ("SettingsJavaReasonMemoryNotNumber", "the memory must be a whole number of MB", "内存必须是整数 MB"),
+    ("SettingsJavaReasonMemoryRange", "the memory is outside the allowed range", "内存超出允许范围"),
+    ("SettingsJavaReasonJvmQuotes", "the JVM arguments have an unclosed quote", "JVM 参数里有没配对的引号"),
+    ("SettingsJavaReasonJvmTooLong", "the JVM arguments are longer than the settings file allows (1024 characters)", "JVM 参数超过配置文件允许的长度（1024 字符）"),
+    ("SettingsJavaReasonAddEmpty", "the path is empty", "路径是空的"),
+    ("SettingsJavaReasonAddMissing", "nothing exists at that path", "那个路径上什么都没有"),
+    ("SettingsJavaReasonAddNotJava", "there is no java executable at that path", "那个路径里没有 java 可执行文件"),
+    ("SettingsJavaReasonAddNoVersion", "java -version did not answer there, so it is not a usable JDK", "在那里跑不出 java -version，不是一份能用的 JDK"),
+    ("SettingsJavaReasonAddTooLong", "the path is too long to be a JDK location", "路径太长，不像是一个 JDK 位置"),
+    ("SettingsJavaReasonAddWriteFailed", "the JDK is fine, but the list file could not be written (disk or permission)", "这份 JDK 没问题，但名单文件写不进去（磁盘或权限）"),
+    ("SettingsJavaReasonAddDuplicate", "that JDK is already in the list", "这份 JDK 已经在列表里了"),
+    ("SettingsJavaReasonWriteFailed", "the settings file could not be written (disk full, no permission, or the value was rejected)", "设置写不进去（磁盘满、没权限，或这个值被拒绝）"),
+    ("SettingsJavaTooNew", "Above the requirement: this instance can only use Java {maximum} or older (the old loader cannot read newer class files)", "高于要求：当前实例只能用 Java {maximum} 及以下（老加载器吃不了新 class 文件）"),
+    // M197：Java 分组的「下载一个 JDK」与三个设置键（`catalog/settings/java.rs` 里同一批追加）。
+    ("SettingsJavaDownloadTitle", "Download a JDK", "下载一个 JDK"),
+    ("SettingsJavaDownloadHint", "Downloads go through the built-in mirror table: in China the campus mirrors are tried first (Temurin over Tsinghua TUNA), and GitHub-hosted archives are fetched through gh-proxy. Every archive is verified against its SHA-256 before it is unpacked.", "下载走内置镜像表：国内先试院校镜像（Temurin 走清华 TUNA），GitHub 上的归档套 gh-proxy。落盘前一律按 SHA-256 校验。"),
+    ("SettingsJavaDownloadLts", "LTS", "长期支持版（LTS）"),
+    ("SettingsJavaDownloadBaseline", "Recommended baseline", "推荐基准版本"),
+    ("SettingsJavaDownloadVendors", "Vendors: {vendors}", "发行版：{vendors}"),
+    ("SettingsJavaDownloadNoVendor", "No vendor publishes this major version on this platform.", "这个平台上没有发行版发这个大版本。"),
+    ("SettingsJavaDownloadAction", "Install", "安装"),
+    ("SettingsJavaDownloadReinstall", "Install again", "重装"),
+    ("SettingsJavaDownloadInstalled", "Already installed: {path}", "已安装：{path}"),
+    ("SettingsJavaDownloadNeeded", "The current instance needs {requirement}.", "当前实例需要 {requirement}。"),
+    ("SettingsJavaDownloadFits", "Usable by the current instance", "当前实例可用"),
+    ("SettingsJavaDownloadTooLow", "The current instance needs Java {minimum} or newer, so installing this one will not start it.", "当前实例需要 Java {minimum} 及以上 —— 装这一档也起不来。"),
+    ("SettingsJavaDownloadTooHigh", "The current instance can only use Java {maximum} or older, so installing this one will not start it.", "当前实例只能用 Java {maximum} 及以下 —— 装这一档也起不来。"),
+    ("SettingsJavaDownloadRecommended", "Recommended for the current instance", "为当前实例推荐这一档"),
+    ("SettingsJavaDownloadBusy", "Installing Java {major}…", "正在安装 Java {major}…"),
+    ("SettingsJavaDownloadPhasePreparing", "Looking up the release…", "正在查版本…"),
+    ("SettingsJavaDownloadPhaseDownloading", "Downloading {percent}% ({done} of {total})", "下载中 {percent}%（{done} / {total}）"),
+    ("SettingsJavaDownloadPhaseVerifying", "Verifying the archive…", "正在校验归档…"),
+    ("SettingsJavaDownloadPhaseExtracting", "Unpacking…", "正在解压…"),
+    ("SettingsJavaDownloadSource", "Source: {source}", "来源：{source}"),
+    ("SettingsJavaDownloadRetry", "{source} failed ({reason}); retry {attempt} in {seconds}s", "{source} 失败（{reason}）；{seconds} 秒后重试第 {attempt} 次"),
+    ("SettingsJavaDownloadSwitch", "Switching source: {from} → {to}", "换源：{from} → {to}"),
+    ("SettingsJavaDownloadDone", "Java {major} ({vendor}) is ready at {root} · source {source}", "Java {major}（{vendor}）已就绪：{root} · 来源 {source}"),
+    ("SettingsJavaDownloadDoneReused", "Java {major} ({vendor}) was already installed at {root}; nothing was downloaded.", "Java {major}（{vendor}）之前已经装好：{root}，这一次没有下载。"),
+    ("SettingsJavaDownloadFailed", "Java {major} could not be installed; the last source tried was {source}. The full reason is in the log.", "Java {major} 没装成；最后试到的源是 {source}。完整原因在日志里。"),
+    ("SettingsJavaDownloadFailedNoSource", "Java {major} could not be installed: the version lookup itself failed. The full reason is in the log.", "Java {major} 没装成：查版本这一步就失败了。完整原因在日志里。"),
+    ("SettingsJavaDownloadFailedHint", "Check the network, or change the vendor order below.", "先查网络，或者改下面的发行版顺序。"),
+    ("SettingsJavaDownloadTriedHeader", "Sources tried:", "试过的源："),
+    ("SettingsJavaDownloadTried", "{source}: {reason}", "{source}：{reason}"),
+    ("SettingsJavaDownloadRefused", "Not started: {reason}", "没开始：{reason}"),
+    ("SettingsJavaReasonDownloadBusy", "another JDK install is already running", "已经有一个 JDK 在装了"),
+    ("SettingsJavaReasonDownloadUnknownMajor", "that major version is not in the catalog", "目录里没有这个大版本"),
+    ("SettingsJavaReasonDownloadNoVendor", "no vendor publishes that major version here", "没有发行版在这里发这个大版本"),
+    ("SettingsJavaReasonRootUnresolved", "the JDK install folder cannot be resolved on this system", "这台机器上解析不出 JDK 安装目录"),
+    ("SettingsJavaSourceReasonNotFound", "this mirror does not have that file (404)", "这个镜像没有这个文件（404）"),
+    ("SettingsJavaSourceReasonServer", "the server answered with a 5xx / 429 error", "服务器报错 5xx / 429"),
+    ("SettingsJavaSourceReasonTimeout", "the request timed out", "请求超时"),
+    ("SettingsJavaSourceReasonNetwork", "the connection failed", "连不上"),
+    ("SettingsJavaSourceReasonIntegrity", "the checksum did not match", "校验不符"),
+    ("SettingsJavaSourceReasonIo", "a local disk error", "本地磁盘错误"),
+    ("SettingsJavaSourceReasonOther", "the request was rejected", "请求被拒"),
+    ("SettingsJavaInstallRoot", "JDK install folder", "JDK 安装目录"),
+    ("SettingsJavaInstallRootPlaceholder", "D:\\Java", "例：D:\\Java"),
+    ("SettingsJavaInstallRootHint", "Leave it empty to follow the data mode: portable keeps JDKs inside the launcher folder, standard uses the system Java folder. A path here overrides both, and JDKs land in <root>/<vendor>/<version>/.", "留空 = 跟数据目录模式走：portable 放在启动器目录里，standard 放在系统 Java 目录。填了它覆盖前两者，JDK 落在 <root>/<发行方>/<版本>/。"),
+    ("SettingsJavaInstallRootEffective", "In effect: {mode} · {path}", "生效：{mode} · {path}"),
+    ("SettingsJavaInstallRootLayerSetting", "this comes from java.installRoot", "这一项来自 java.installRoot"),
+    ("SettingsJavaInstallRootLayerDataMode", "this comes from core.data_mode ({mode})", "这一项来自 core.data_mode（{mode}）"),
+    ("SettingsJavaInstallRootUnresolved", "The system Java folder cannot be resolved here. Type a folder above, or set core.data_mode back to portable.", "这台机器上解析不出系统标准 Java 目录。在上面填一个目录，或把 core.data_mode 改回 portable。"),
+    ("SettingsJavaVendorPriority", "Vendor order", "发行版顺序"),
+    ("SettingsJavaVendorOrderEffective", "In effect: {order}", "生效顺序：{order}"),
+    ("SettingsJavaVendorOrderLayerSetting", "this comes from java.vendorPriority", "这一项来自 java.vendorPriority"),
+    ("SettingsJavaVendorOrderLayerRegion", "this comes from the built-in order for your region ({region})", "这一项来自内置的地区默认序（{region}）"),
+    ("SettingsJavaRegionDomestic", "China", "国内"),
+    ("SettingsJavaRegionGlobal", "rest of the world", "国外"),
+    ("SettingsJavaVendorUp", "Up", "上移"),
+    ("SettingsJavaVendorDown", "Down", "下移"),
+    ("SettingsJavaVendorReset", "Reset to the region default", "恢复地区默认序"),
+    ("SettingsJavaVendorSupports", "ships {majors}", "发 {majors}"),
+    ("SettingsJavaAutoInstall", "Recommend a JDK when none is found", "缺 JDK 时推荐一档"),
+    ("SettingsJavaAutoInstallHint", "On: the catalog below marks the version the current instance needs, and a freshly installed JDK becomes the default when no default is set yet. Nothing is downloaded on its own — you press Install. Off: nothing is marked and you pick everything yourself.", "开：下面的目录会按当前实例的要求标出该装哪一档，装完之后若还没有默认 JDK 就自动设为默认。不会自己开始下载 —— 点「安装」才会下。关：什么也不标，全部自己挑。"),
+    ("SettingsJavaAutoInstallOn", "on", "开"),
+    ("SettingsJavaAutoInstallOff", "off", "关"),
+    ("SettingsJavaPrefsSave", "Save", "保存"),
+    ("SettingsJavaPrefsSaved", "Saved and read back from disk: all three keys are in the settings file.", "已保存并从磁盘读回：三个键都进配置文件了。"),
+    ("SettingsJavaPrefsUnsaved", "There are unsaved changes in this section.", "这一段有未保存的改动。"),
+    ("SettingsJavaReasonInstallRootTooLong", "the folder path is too long", "目录路径太长"),
+    // M201：设置页 Downloads 组的文本行提交按钮（装配链里本域紧随 `settings_java_entries`）。
+    ("SettingsDownloadsApply", "Apply", "应用"),
+];

crates/i18n/src/catalog/golden/tail2.rs

@@ -0,0 +1,243 @@
+//! 金表的第三段（`tail.rs` 之后，M161 拆：`tail.rs` 到 M157 已有 411 行、加自更新那几条就 423）。
+//!
+//! 口径与 `golden.rs` / `tail.rs` 完全一致：**纯搬移、一行不改**，顺序即 `Key::ALL` 的续段。
+//! 拼装见 `golden.rs` 的 [`super::rows`]。
+
+pub(super) const ROWS: &[(&str, &str, &str)] = &[
+    ("PackImportAction", "Import", "导入"),
+    ("PackCancel", "Cancel import", "取消导入"),
+    ("PackDismiss", "Dismiss", "关闭"),
+    ("PackTargetLabel", "Install into", "装到实例"),
+    ("PackTargetNew", "New instance", "新建实例"),
+    ("PackInstanceName", "Instance name", "实例名"),
+    ("PackStageLine", "Step {index}/{total} · {stage}", "步骤 {index}/{total} · {stage}"),
+    ("PackStageProbe", "Reading the manifest", "读取清单"),
+    ("PackStageExtract", "Unpacking overrides", "解包覆盖内容"),
+    ("PackStageFetch", "Fetching missing files", "补下载文件"),
+    ("PackStageCommit", "Writing files", "落地写盘"),
+    ("PackStageRegister", "Registering the instance", "登记实例"),
+    ("PackProbeTitle", "This pack is almost a known format", "这个包差一点就是已知格式"),
+    ("PackProbeLooksLike", "Looks like {format}, but missing: {missing}", "看起来像 {format}，但缺：{missing}"),
+    ("PackProbeUnknown", "No known format claims this pack", "没有任何已知格式认领这个包"),
+    ("PackProbeSaw", "Found in the pack: {saw}", "包里看到：{saw}"),
+    ("PackProbeNothing", "nothing recognisable", "没有可识别的东西"),
+    ("PackStatusSuccess", "Imported", "已导入"),
+    ("PackStatusPartial", "Imported with gaps", "导入完成，但有缺口"),
+    ("PackStatusFailed", "Import failed — rolled back", "导入失败 —— 已整包回滚"),
+    ("PackReportWritten", "Files written: {count} · {bytes}", "{count} 个文件已写盘 · {bytes}"),
+    ("PackReportMissing", "Could not fetch (tolerated): {count}", "有 {count} 个文件没搞到（可容忍）"),
+    ("PackReportConflicts", "Conflicts: {count}", "冲突：{count} 个"),
+    ("PackReportRejected", "The client does not support these: {count}", "这些组件客户端不支持：{count} 个"),
+    ("PackReportRejectedNote", "not supported by the client", "客户端不支持"),
+    ("PackCancelled", "Cancel requested — the pipeline is stopping now; the real outcome follows.", "已请求取消 —— 后台正在停手，真实结果随后给出。"),
+    ("PackStatusCancelled", "Cancelled — rolled back", "已取消 —— 已回滚"),
+    ("PackCancelIncomplete", "Cancelled — rollback incomplete: the target directory may differ from before the import.", "已取消 —— 回滚没做完：目标目录可能与导入前不同。"),
+    ("PackCancelTooLate", "The cancel arrived too late: this import already finished. The instance is kept; same-name files may already be overwritten.", "取消来得太晚：这次导入已经跑完，实例会保留，同名文件可能已被覆盖。"),
+    ("PackOverwriteAction", "Re-import, the pack wins", "以包为准重新导入"),
+    ("PackOverwriteNote", "Keeping both (renamed) is not supported yet: for each existing file you pick either “keep” or “overwrite”.", "「两者都留（改名）」暂不支持：每个已存在的文件只能选「保留」或「覆盖」。"),
+    ("PackMissingOffline", "offline import", "离线导入"),
+    ("PackMissingNoSource", "no download source available yet", "暂时拿不到下载地址"),
+    ("PackMissingFetchFailed", "download failed: {detail}", "下载失败：{detail}"),
+    ("PackFatalTitle", "Rolled back — nothing was left behind", "已回滚 —— 目标目录零残留"),
+    ("PackFatalHint", "What to try next", "下一步可以试"),
+    ("PackConflictUserModified", "you changed it", "你改过"),
+    ("PackConflictUserDeleted", "you deleted it", "你删过"),
+    ("PackConflictPreExisting", "was already there", "本来就在"),
+    ("PackChoiceKeepUser", "kept yours", "保留我的"),
+    ("PackChoiceOverwrite", "pack version used", "用包里的"),
+    ("PackConflictHashes", "pack {pack} · base {base} · disk {disk}", "包内 {pack} · 基线 {base} · 磁盘 {disk}"),
+    ("PackConflictDetail", "Hashes", "三方哈希"),
+    ("PackPickTitle", "Before importing: {count} files already exist with different content", "导入前：有 {count} 个文件已存在且内容不同"),
+    ("PackPickSummary", "Keep {keep} · overwrite {overwrite} · overwriting discards {bytes}", "保留 {keep} · 覆盖 {overwrite} · 覆盖将丢弃 {bytes}"),
+    ("PackPickKeepAll", "Keep all mine", "全部保留我的"),
+    ("PackPickOverwriteAll", "Overwrite all", "全部覆盖"),
+    ("PackPickRowKeep", "Keep", "保留"),
+    ("PackPickRowOverwrite", "Overwrite", "覆盖"),
+    ("PackPickPage", "Items {from}-{to} of {total}", "第 {from}-{to} 项，共 {total} 项"),
+    ("PackPickPrev", "Previous", "上一页"),
+    ("PackPickNext", "Next", "下一页"),
+    ("PackPickConfirm", "Import with these choices", "按这些选择导入"),
+    ("PackPickCancel", "Cancel import", "取消导入"),
+    ("PackPickDefaultNote", "Anything you do not change stays as you have it: file content is only replaced where you pick “Overwrite”.", "没有改动的一律按「保留」：只有你点了「覆盖」的文件才会被包内内容替换。"),
+    ("PackPickUnknownRemote", "{count} remote entries only learn their path after download; they follow “keep”.", "还有 {count} 条远端条目要下载后才知道路径，一律按「保留」处置。"),
+    ("PackPickSourceOverrides", "in the pack (overrides/)", "包内 overrides/"),
+    ("PackPickSourceClientOverrides", "in the pack (client-overrides/)", "包内 client-overrides/"),
+    ("PackPickSourceManifest", "manifest files[]", "清单 files[]"),
+    ("PackPickDisk", "yours: {size}", "你的：{size}"),
+    ("PackPickIncoming", "pack: {size}", "包内：{size}"),
+    ("PackFormatModrinth", "Modrinth .mrpack", "Modrinth 的 .mrpack"),
+    ("PackFormatCurseforge", "CurseForge manifest", "CurseForge 清单"),
+    ("PackFormatMultimc", "MultiMC / Prism instance", "MultiMC·Prism 实例"),
+    ("PackExportTitle", "Export this instance", "导出这个实例"),
+    ("PackExportOpen", "Export…", "导出…"),
+    ("PackExportFormat", "Format", "格式"),
+    ("PackExportName", "Pack name", "包名"),
+    ("PackExportVersion", "Version", "版本"),
+    ("PackExportOutput", "Save to", "保存到"),
+    ("PackExportOutputPlaceholder", "empty = suggested path", "留空 = 自动给一个路径"),
+    ("PackExportPrecheck", "Dry run", "预检"),
+    ("PackExportConfirm", "Write the pack", "确认写盘"),
+    ("PackExportAbort", "Back", "返回"),
+    ("PackExportMultimcNote", "MultiMC/Prism can only be imported, not exported (by design).", "MultiMC·Prism 只能导入、不能导出（有意省略）。"),
+    ("PackExportDone", "Wrote {path} · {bytes}", "已写出 {path} · {bytes}"),
+    ("PackExportFailed", "Export failed: {reason}", "导出失败：{reason}"),
+    ("PackExportPending", "Scanning the instance…", "正在扫描实例…"),
+    ("PackPreviewHead", "Will inline {inline} files · cannot export: {skipped}", "将内联 {inline} 个文件 · 无法导出 {skipped} 项"),
+    ("PackPreviewRemote", "{count} files can be referenced remotely", "{count} 个文件可走远程引用"),
+    ("PackPreviewInlineBytes", "{bytes} copied into overrides/", "{bytes} 会原样拷进 overrides/"),
+    ("PackPreviewInlineTitle", "Copied into overrides/ (first {shown}):", "原样拷进 overrides/（只列前 {shown} 个）："),
+    ("PackPreviewSkippedTitle", "Not in the pack: {count}", "没进包：{count} 项"),
+    ("PackPreviewNotes", "Known losses", "已知损失"),
+    ("PackPreviewTarget", "Will be written to {path}", "将写到 {path}"),
+    ("PackPreviewMore", "…and {count} more files (not shown here)", "…还有 {count} 个文件（这里不展开）"),
+    ("PackPreviewComplete", "Nothing is left out", "没有遗漏任何文件"),
+    ("PackPreviewIncomplete", "Some files will not be in the pack", "有文件不会进包"),
+    ("PackReasonModrinthSha1", "Modrinth match (SHA-1)", "Modrinth 命中（SHA-1）"),
+    ("PackReasonCurseFingerprint", "CurseForge match (fingerprint)", "CurseForge 命中（文件指纹）"),
+    ("PackReasonNoRemoteMatch", "unknown to both catalogs, inlined", "两个目录都不认识，已内联"),
+    ("PackReasonCurseOnly", "only CurseForge knows it, this format cannot use it, inlined", "只有 CF 认识，目标格式用不上，已内联"),
+    ("PackReasonModrinthOnly", "only Modrinth knows it, the CF manifest cannot use it, inlined", "只有 Modrinth 认识，CF 清单用不上，已内联"),
+    ("PackReasonMissingSha512", "the catalogue entry has no sha512 hash, inlined", "命中缺 sha512，已内联"),
+    ("PackReasonMissingCurseIds", "the catalogue entry has no CurseForge ids, inlined", "命中缺 projectID/fileID，已内联"),
+    ("PackReasonDisabled", "disabled file, this format cannot express it (.disabled kept)", "禁用文件，目标格式表达不了（保留 .disabled）"),
+    ("PackReasonSymlink", "symbolic link, skipped", "符号链接，已跳过"),
+    ("PackReasonUnsafePath", "path fails the pack path rules, skipped", "路径过不了包内规整，已跳过"),
+    ("PackReasonUnreadable", "cannot read it, skipped", "读不出来，已跳过"),
+    ("PackStatusFailedNotStarted", "Import failed — nothing was written", "导入失败 —— 还没写任何文件"),
+    ("PackStatusFailedIncomplete", "Import failed — rollback did not finish", "导入失败 —— 回滚没做完"),
+    ("PackFatalTitleNotStarted", "Preflight failed — nothing was written", "预检未通过 —— 一个字节都没写"),
+    ("PackFatalTitleIncomplete", "Rollback did not finish — the target folder may differ", "回滚没做完 —— 目标目录可能与导入前不同"),
+    ("AccountTitle", "Accounts", "账户"),
+    ("AccountSubtitle", "Microsoft, third-party skin servers and local profiles", "微软正版、第三方皮肤站与本地档案"),
+    ("AccountListTitle", "All accounts", "全部账户"),
+    ("AccountAddedOn", "Added {date}", "添加于 {date}"),
+    ("AccountActiveChip", "Active", "当前"),
+    ("AccountSwitch", "Use for launch", "切换为启动账户"),
+    ("AccountRelogin", "Sign in again", "重新登录"),
+    ("AccountRemove", "Remove", "删除"),
+    ("AccountKindMicrosoft", "Microsoft", "微软正版"),
+    ("AccountKindAuthlib", "Third-party skin server", "第三方皮肤站"),
+    ("AccountKindOffline", "Local profile", "本地档案"),
+    ("AccountServer", "Server {server}", "服务器 {server}"),
+    ("AccountEmptyTitle", "No accounts yet", "还没有账户"),
+    ("AccountEmptyBody", "Add a Microsoft account, a third-party skin server account, or a local profile.", "添加微软正版账户、第三方皮肤站账户，或建一个本地档案。"),
+    ("AccountEmptyAction", "Add an account", "添加账户"),
+    ("AccountTrackMicrosoftTitle", "Microsoft account", "微软正版"),
+    ("AccountTrackMicrosoftBody", "Sign in with a device code or in your browser. Online servers require this kind of account.", "用设备码或浏览器登录。联机服务器必须用这种账户。"),
+    ("AccountTrackAuthlibTitle", "Third-party skin server", "第三方皮肤站"),
+    ("AccountTrackAuthlibBody", "An authlib-injector compatible server (LittleSkin and friends) brings its own skins and capes.", "兼容 authlib-injector 的皮肤站（如 LittleSkin）自带皮肤与披风。"),
+    ("AccountTrackOfflineTitle", "Local profile", "本地档案"),
+    ("AccountTrackOfflineBody", "Local / isolated-network testing only — it cannot join servers that require a genuine Minecraft account.", "仅本地/隔离网络测试用，无法连接启用正版验证的服务器。"),
+    ("AccountTrackOpen", "Sign in", "登录"),
+    ("AccountTrackCreate", "Create profile", "创建档案"),
+    ("AccountDialogClose", "Close", "关闭"),
+    ("AccountOfflineNameLabel", "Profile name", "档案名"),
+    ("AccountOfflineNameHint", "3–16 letters, digits or underscore", "3–16 位字母、数字或下划线"),
+    ("AccountOfflineSubmit", "Create profile", "创建档案"),
+    ("AccountOfflineWarning", "Local / isolated-network testing only — it cannot join servers that require a genuine Minecraft account.", "仅本地/隔离网络测试用，无法连接启用正版验证的服务器。"),
+    ("AccountDeviceCodeLabel", "Enter this code", "输入这个用户码"),
+    ("AccountDeviceCodeCopy", "Copy code", "复制用户码"),
+    ("AccountDeviceLinkCopy", "Copy link", "复制链接"),
+    ("AccountDeviceCountdown", "{time} left", "剩 {time}"),
+    ("AccountDeviceExpired", "This code has expired. Start again for a fresh one.", "这个用户码已过期，重新开始换一个新的。"),
+    ("AccountDeviceRetry", "Try again", "重试"),
+    ("AccountDeviceCancel", "Cancel", "取消"),
+    ("AccountDeviceBrowser", "Sign in with browser", "用浏览器登录"),
+    ("AccountDeviceSignIn", "Sign in with your Microsoft account", "使用 Microsoft 账户登录"),
+    ("AccountDeviceFallbackHint", "No browser handy? This way shows a code you can type on any device.", "浏览器打不开就用这个：它会给一串用户码，在任何设备上输入即可。"),
+    ("AccountServerLabel", "Server address", "服务器地址"),
+    ("AccountServerHint", "API root, e.g. https://littleskin.cn/api/yggdrasil/", "API 根，例：https://littleskin.cn/api/yggdrasil/"),
+    ("AccountServerProbe", "Check server", "校验服务器"),
+    ("AccountLoginNameLabel", "Email or username", "邮箱或用户名"),
+    ("AccountPasswordLabel", "Password", "密码"),
+    ("AccountPasswordHint", "Used once for this sign-in. It is never stored.", "只在这次登录里用一次，不会保存。"),
+    ("AccountAuthlibSubmit", "Sign in", "登录"),
+    ("AccountAuthlibIdleHint", "The server is checked automatically when you sign in; Check server only does it up front.", "登录时会自动校验服务器；「校验服务器」只是提前跑一遍。"),
+    ("AccountSkinTitle", "Skin", "皮肤"),
+    ("AccountSkinNone", "No skin available", "没有可用皮肤"),
+    ("AccountSkinHint", "Skins come from the account's own server; nothing is generated locally.", "皮肤来自账户自己的服务器，本地不生成任何假皮肤。"),
+    ("AccountRailSignedOut", "Not signed in", "未登录"),
+    ("AccountDeviceHint", "Open the link in your browser and enter the code above.", "在浏览器里打开链接，输入上面的用户码。"),
+    ("AccountDeviceBrowserHint", "Finish the sign-in in the browser window we just opened; the link below also works.", "在我们刚打开的浏览器窗口里完成登录；下面的链接也能手动打开。"),
+    ("AccountServerChecking", "Checking the server…", "正在校验服务器…"),
+    ("AccountServerOk", "Server {server} is ready", "服务器 {server} 可用"),
+    ("AccountLoginFailed", "Sign-in failed", "登录失败"),
+    ("AccountCurrentTitle", "Current account", "当前账户"),
+    ("AccountFailureCode", "Code: {code}", "代码：{code}"),
+    ("AccountFailureDenied", "The server refused this sign-in (access denied).", "服务器拒绝了这次登录（拒绝访问）。"),
+    ("AccountFailureWhitelist", "Microsoft has not approved this launcher's app registration yet. An administrator has to accept the app, then try again.", "微软还没批准本启动器的应用注册：需要管理员同意该应用后再试。"),
+    ("AccountFailureUnreachable", "Could not reach the server. Check the network connection or the address, then try again.", "连不上服务器：检查网络或地址后重试。"),
+    ("AccountFailureNotAuthlib", "This address does not look like an authlib-injector server (the API root usually ends with /api/yggdrasil/).", "这个地址不像 authlib-injector 服务器（API 根通常以 /api/yggdrasil/ 结尾）。"),
+    ("AccountFailureBadCredentials", "The server rejected the username or password.", "服务器不认这个用户名或密码。"),
+    ("AccountFailureNoProfile", "The account has no Minecraft profile on this server yet. Create the character on the server first.", "这个账号在该服务器上还没有角色：先在皮肤站里创建角色。"),
+    ("AccountFailureStore", "Could not save the account to disk.", "账户没能写到磁盘上。"),
+    ("AccountFailureOther", "The sign-in failed. The full reason is in the launcher log.", "登录失败，完整原因在启动器日志里。"),
+    ("AccountLoginNotConfigured", "Microsoft sign-in is not configured", "微软登录未配置"),
+    ("AccountFailureMsaNotConfigured", "This build has no Azure public client id, so Microsoft sign-in cannot start (the sign-in flow itself is implemented). Set the environment variable ULL_MSA_CLIENT_ID=<id> before starting the launcher, or build with ULL_MSA_CLIENT_ID=<id>. Then restart the launcher: a running process does not pick up a new environment variable.", "本启动器没有配置 Azure 公共客户端 id，微软登录无法开始（登录功能已实现，只差这一项配置）。启动前设置环境变量 ULL_MSA_CLIENT_ID=<id>，或构建时注入：ULL_MSA_CLIENT_ID=<id> cargo build。改完请重启启动器——已在运行的进程读不到新设的环境变量。"),
+    ("AccountDeviceRequesting", "Contacting Microsoft…", "正在联系微软…"),
+    ("AccountLoginSucceeded", "Signed in as {name}", "已登录 {name}"),
+    ("AccountNoticeAdded", "Added {name}", "已添加 {name}"),
+    ("AccountNoticeRemoved", "Removed {name}", "已删除 {name}"),
+    ("AccountNoticeSwitched", "{name} will be used for the next launch", "{name} 将作为下次启动的账户"),
+    ("AccountNoticeOfflineNameInvalid", "Profile names must be 3–16 letters, digits or underscores.", "档案名必须是 3–16 位字母、数字或下划线。"),
+    ("AccountNoticeAccountExists", "An account with that name already exists.", "同名账户已经存在。"),
+    ("AccountNoticeStoreFailed", "Could not save the account store. Check the disk and try again.", "账户库写不进去：检查磁盘后重试。"),
+    ("AccountNoticeNotFound", "That account no longer exists.", "这个账户已经不在了。"),
+    ("AccountNoticeOther", "The account action failed. The full reason is in the launcher log.", "账户操作失败，完整原因在启动器日志里。"),
+    ("AccountNoticeDismiss", "Dismiss", "关闭"),
+    ("AccountNoticeTitleFailed", "Account action failed", "账户操作失败"),
+    ("AccountNoticeTitleDone", "Account updated", "账户已更新"),
+    ("AccountHintAuthlibReauth", "Enter the password again for {server}.", "请输入 {server} 的密码。"),
+    ("AccountHintOfflineNoRelogin", "Local profiles have no server account to sign in again — create a new profile instead.", "本地档案没有可重新登录的服务器账户，请新建一个档案。"),
+    ("AccountBrowserFallbackNotRegistered", "This build's app registration has no loopback redirect URI, so browser sign-in cannot work; switched to a device code. To fix: add http://localhost/auth under Redirect URIs in the Azure app registration (the port is ignored), then restart the launcher.", "这个构建的应用注册里没有登记回环重定向 URI，浏览器登录用不了，已自动改用设备码。怎么修：在 Azure 应用注册的「重定向 URI」里加上 http://localhost/auth（端口不参与匹配），然后重启启动器。"),
+    ("AccountBrowserFallbackUnverified", "Could not confirm that browser sign-in is usable, so it switched to a device code.", "没能确认浏览器登录是否可用（预检没成功），已自动改用设备码。"),
+    ("AccountBrowserFallbackFailed", "Browser sign-in did not finish, so it switched to a device code. If the browser page said the redirect URI is not valid, add http://localhost/auth under Redirect URIs of the app registration.", "浏览器登录没有完成，已自动改用设备码。如果浏览器里提示 redirect_uri 无效，请把 http://localhost/auth 加进应用注册的「重定向 URI」。"),
+    ("SettingsGroupUpdate", "Updates", "更新"),
+    ("SettingsUpdateCurrent", "Current version", "当前版本"),
+    ("SettingsUpdateChannel", "Channel", "更新渠道"),
+    ("SettingsUpdateChannelStable", "Stable", "稳定版"),
+    ("SettingsUpdateAutoCheck", "Check for updates on startup", "启动时检查更新"),
+    ("SettingsUpdateCheckNow", "Check now", "立即检查"),
+    ("SettingsUpdateChecking", "Checking…", "正在检查…"),
+    ("SettingsUpdateNever", "Not checked yet", "还没检查过"),
+    ("SettingsUpdateUpToDate", "You are on the latest version ({version})", "已是最新（{version}）"),
+    ("SettingsUpdateAvailable", "Version {version} is available ({size})", "有新版本 {version}（{size}）"),
+    ("SettingsUpdateMissingArtifact", "Version {version} is out, but there is no build for this platform yet.", "{version} 已发布，但还没有本平台的安装包。"),
+    ("SettingsUpdateFailed", "Check failed: {reason}", "检查失败：{reason}"),
+    ("SettingsUpdateApply", "Download and install", "下载并安装"),
+    ("SettingsUpdateApplying", "Downloading and verifying…", "正在下载并校验…"),
+    ("SettingsUpdateReady", "Version {version} is ready — restart to use it.", "版本 {version} 已就位，重启后生效。"),
+    ("SettingsUpdateNotes", "Release notes: {notes}", "更新说明：{notes}"),
+    ("SettingsUpdateForced", "This update is required", "这是一次强制更新"),
+    ("SettingsUpdateLastChecked", "Last check", "上次检查"),
+    ("SettingsUpdateHint", "Downloads are verified with SHA256 before they touch the launcher. The running copy stays as it is until you restart.", "更新包在落到启动器之前会做 SHA256 校验；正在运行的这一份在你重启之前不会变。"),
+    ("UpdateBannerTitleAvailable", "Version {version} is available", "发现新版本 {version}"),
+    ("UpdateBannerBodyAvailable", "Download size {size}", "下载体积 {size}"),
+    ("UpdateBannerTitleReady", "Update ready", "更新已就位"),
+    ("UpdateBannerBodyReady", "Version {version} will run after a restart.", "重启后运行版本 {version}。"),
+    ("UpdateBannerTitleFailed", "Update failed", "更新失败"),
+    ("UpdateBannerApplying", "Downloading the update…", "正在下载更新…"),
+    ("UpdateBannerInstall", "Download and install", "下载并安装"),
+    ("UpdateBannerDismiss", "Skip this version", "忽略这个版本"),
+    ("UpdateBannerRestartNow", "Restart now", "立即重启"),
+    ("UpdateBannerRetry", "Try again", "重试"),
+    // M168：中文字体下载状态行（链尾追加，既有顺序不动）
+    ("FontCjkStatusLabel", "Chinese font", "中文字体"),
+    ("FontCjkStatusNotNeeded", "Not needed for this interface language", "当前界面语言不需要中文字体"),
+    ("FontCjkStatusSystem", "Ready (system font: {family})", "已就绪（系统字体：{family}）"),
+    ("FontCjkStatusDownloading", "Fetching a Chinese font… ({size})", "正在获取中文字体…（{size}）"),
+    ("FontCjkStatusFailed", "Download failed ({reason}). The interface keeps working with system fonts; switch the language again to retry.", "获取失败（{reason}）。界面照常可用，用的是系统字体；再切一次语言可以重试。"),
+    ("FontCjkReasonNetwork", "network unreachable or too slow (timed out)", "网络不通或太慢（超时）"),
+    ("FontCjkReasonIntegrity", "the mirror sent content that failed verification", "镜像内容校验不通过"),
+    ("FontCjkReasonDisk", "cannot write to the data directory", "写不进数据目录"),
+    ("FontCjkStatusUnknown", "Not determined yet; nothing was downloaded", "尚未判定；没有下载任何字体"),
+    ("FontCjkStatusUnprobeable", "System fonts cannot be probed, so nothing was downloaded", "无法探测系统字体，因此没有下载"),
+    ("FontCjkStatusHint", "Downloaded once into the data directory and cached; the next start does not download it again. A mirror can be set with ui.font_cdn.", "只下这一次，缓存在数据目录里，下次启动不重下。镜像可用配置键 ui.font_cdn 指定。"),
+    ("SettingsAppearanceAccent", "Accent colour", "强调色"),
+    ("SettingsAppearanceAccentPresets", "Presets", "预设"),
+    ("SettingsAppearanceAccentFactory", "Factory", "出厂"),
+    ("SettingsAppearanceAccentHint", "Empty = the factory accent from the brand board. A custom accent replaces primary / secondary / tertiary only; neutral surfaces and error colours do not follow it.", "空 = 出厂品牌板的强调色。自定义强调色只替换 primary / secondary / tertiary 三族；中性表面与错误色不随强调色变。"),
+    ("SettingsAppearanceAccentShort", "Accent needs 6 hex digits (RRGGBB); got {digits}.", "强调色要 6 位十六进制（RRGGBB），现在 {digits} 位。"),
+    ("SettingsAppearanceAccentLong", "Accent has {digits} digits; a colour takes exactly 6.", "强调色有 {digits} 位，一个颜色只要 6 位。"),
+    ("SettingsAppearanceAccentDigit", "Accent contains a character that is not a hex digit: {ch}", "强调色里有非十六进制字符：{ch}"),
+];

crates/i18n/src/catalog/golden/tail_ai.rs

@@ -0,0 +1,282 @@
+//! 金表的**第四段**（旧 `tail.rs` 从 M174 的助手域起的那一半；M197 拆出）。
+//!
+//! 为什么拆：`tail.rs` 在 M197 加了「下载一个 JDK / 三个设置键」这 70 多条文案后到 400+ 行
+//! （`guards.yml` 的 `file-size` 会红）。拆分口径与仓库其它 `-p1/-p2` / `tail2` 一致：
+//! **纯搬移、一行不改**，顺序即 `Key::ALL` 的续段——本段从 M174 的助手域开始，
+//! 一路到旧 `tail.rs` 末尾（后面还跟着 core_text / download / logs / agent / version /
+//! content / pack 各行，它们本来就在这个位置）。
+//!
+//! 拼装见 [`super::super::golden::rows`]（链序：`golden` → `tail` → 本段 → `tail2`）。
+//!
+//! 正文是 **dev 侧 `tail.rs` 从 M174 助手域起** 的全部行（含其它 mission 后加的行），
+//! 逐字节原样搬来；本段只负责把它们放到 `Key::ALL` 的同一位置。
+pub(super) const ROWS: &[(&str, &str, &str)] = &[
+    // M174：设置页「助手（AI）」分组（`catalog/settings/ai.rs` 的 `settings_ai_entries`）。
+    // 位置就是装配链里那个域的位置：`settings_ai_entries` 在 `settings_download_entries` 之后、
+    // `core_text_entries` 之前，所以这几行必须落在 `SettingsAppearanceCornerSuspended` 与
+    // `CoreTextUntranslated` 之间（顺序 = `Key::ALL`）。
+    ("SettingsGroupAssistant", "Assistant", "助手"),
+    ("SettingsAiStatusLabel", "Status: {status}", "状态：{status}"),
+    ("SettingsAiStatusUnconfigured", "not configured", "未配置"),
+    ("SettingsAiStatusConfigured", "configured", "已配置"),
+    ("SettingsAiStatusVerified", "verified", "连接已通过"),
+    ("SettingsAiStatusTestFailed", "test failed", "测试失败"),
+    ("SettingsAiEnable", "Enable the assistant", "启用助手"),
+    ("SettingsAiEnableHint", "With this off, the assistant stays quiet; crash diagnosis from the rule engine keeps working.", "关掉之后助手不再工作；规则引擎的崩溃诊断照常可用。"),
+    ("SettingsAiProviderLabel", "Provider", "提供商"),
+    ("SettingsAiProviderOpenAi", "OpenAI compatible", "OpenAI 兼容"),
+    ("SettingsAiProviderAnthropic", "Anthropic", "Anthropic 原生"),
+    ("SettingsAiProviderOllama", "Ollama", "Ollama 原生"),
+    ("SettingsAiProviderDisabled", "Disabled", "已禁用"),
+    ("SettingsAiBaseUrl", "Endpoint (base_url)", "端点（base_url）"),
+    ("SettingsAiBaseUrlPlaceholder", "http://127.0.0.1:8080/v1", "例：http://127.0.0.1:8080/v1"),
+    ("SettingsAiBaseUrlHint", "The /v1 root of an OpenAI-compatible service. Leave empty to use the provider default.", "OpenAI 兼容服务的 /v1 根地址；留空则用该提供商的默认端点。"),
+    ("SettingsAiEffective", "Effective: {value}", "生效：{value}"),
+    ("SettingsAiModel", "Model name", "模型名称"),
+    ("SettingsAiModelPlaceholder", "deepseek-chat", "例：deepseek-chat"),
+    ("SettingsAiApiKey", "API key", "API 密钥"),
+    ("SettingsAiApiKeyPlaceholder", "Paste the key", "粘贴密钥"),
+    ("SettingsAiApiKeyConfigured", "A key is stored ({chars} characters). Leave this empty to keep it.", "已保存密钥（{chars} 个字符）。留空则保持不变。"),
+    ("SettingsAiApiKeyMissing", "No key stored yet", "还没有保存密钥"),
+    ("SettingsAiShow", "Show", "显示"),
+    ("SettingsAiHide", "Hide", "隐藏"),
+    ("SettingsAiSave", "Save", "保存"),
+    ("SettingsAiTest", "Test connection", "测试连接"),
+    ("SettingsAiTesting", "Testing…", "正在测试…"),
+    ("SettingsAiSaved", "Saved. It takes effect immediately, no restart needed.", "已保存，立刻生效，不用重启。"),
+    ("SettingsAiRefused", "Not saved: {reason}", "未保存：{reason}"),
+    ("SettingsAiUnsaved", "There are unsaved changes.", "有未保存的改动。"),
+    ("SettingsAiNoStorage", "No settings file is available in this run, so nothing can be saved or tested.", "这一次运行没有可用的设置文件，保存与测试都做不了。"),
+    ("SettingsAiTestDisabled", "Fill in the missing field before testing: {missing}.", "先补上这一项再测试：{missing}。"),
+    ("SettingsAiMissingDisabled", "the assistant is disabled", "助手处于关闭状态"),
+    ("SettingsAiMissingBaseUrl", "the endpoint address", "端点地址"),
+    ("SettingsAiMissingModel", "the model name", "模型名称"),
+    ("SettingsAiMissingApiKey", "the API key", "API 密钥"),
+    ("SettingsAiReasonProvider", "the provider value is not recognised", "提供商取值不认识"),
+    ("SettingsAiReasonBaseUrl", "the endpoint must start with http:// or https://", "端点必须以 http:// 或 https:// 开头"),
+    ("SettingsAiReasonModel", "the model name is required", "必须填模型名称"),
+    ("SettingsAiTestPassed", "Connected — the endpoint answered.", "连接通过 —— 端点有正常回应。"),
+    ("SettingsAiTestAuth", "Authentication failed: the endpoint rejected the key.", "鉴权失败：端点拒绝了这个密钥。"),
+    ("SettingsAiTestModel", "The endpoint answered, but this model does not exist.", "端点通了，但没有这个模型。"),
+    ("SettingsAiTestUnreachable", "The endpoint is unreachable.", "端点不可达。"),
+    ("SettingsAiTestTimeout", "Timed out while waiting for the endpoint.", "等端点回应超时了。"),
+    ("SettingsAiTestOther", "The request failed for another reason (see the detail below).", "请求因为别的原因失败了（详情见下）。"),
+    ("SettingsAiTestNotConfigured", "Nothing was sent: the configuration is incomplete.", "什么都没有发出去：配置还不完整。"),
+    ("SettingsAiTestTarget", "Target: {base_url} · model {model} · {ms} ms", "目标：{base_url} · 模型 {model} · {ms} 毫秒"),
+    ("SettingsAiTestDetail", "Detail: {detail}", "详情：{detail}"),
+    ("CoreTextUntranslated", "[system text not translated]", "［未翻译的系统文案］"),
+    ("DownloadTitle", "Version management", "版本管理"),
+    ("DownloadSubtitle", "Manage versions and loaders: install, upgrade, repair", "管理版本与加载器：安装、升级、修复"),
+    ("DownloadRefresh", "Refresh", "刷新"),
+    ("DownloadInstall", "Install", "安装"),
+    ("DownloadCancel", "Cancel install", "取消安装"),
+    ("DownloadInstalled", "Installed", "已安装"),
+    ("DownloadCount", "{count} versions", "{count} 个版本"),
+    ("DownloadRowSupporting", "{kind} · released {date}", "{kind} · 发布于 {date}"),
+    ("DownloadSelectHint", "Pick a version, then install", "选一个版本再安装"),
+    ("DownloadLoading", "Loading versions…", "正在加载版本列表…"),
+    ("DownloadLoadingHint", "If this stays here, press Refresh in the top right.", "如果一直停在这里，点右上角的刷新。"),
+    ("DownloadEmptyTitle", "No versions to show", "没有可显示的版本"),
+    ("DownloadEmptyBody", "Pick another category, or refresh the list.", "换一个分类，或刷新一次列表。"),
+    ("DownloadCategoryAll", "All", "全部"),
+    ("DownloadCategoryRelease", "Release", "正式版"),
+    ("DownloadCategorySnapshot", "Snapshot", "预览版"),
+    ("DownloadCategoryAncient", "Ancient", "远古版"),
+    ("DownloadStagePlanning", "Planning", "解析版本"),
+    ("DownloadStageDownloading", "Downloading files", "下载文件"),
+    ("DownloadStageInstalling", "Building the version", "生成版本"),
+    ("DownloadStageRegistering", "Registering the instance", "登记实例"),
+    ("DownloadStageDone", "Done", "已完成"),
+    ("DownloadStageFailed", "Install failed", "安装失败"),
+    ("DownloadStageCancelled", "Install cancelled", "安装已取消"),
+    ("DownloadProgress", "{done}/{total} files", "{done}/{total} 文件"),
+    ("DownloadProgressUnknown", "Waiting for the first file…", "等第一个文件…"),
+    ("DownloadRate", "{speed} · {eta}", "{speed}，{eta}"),
+    ("DownloadEtaSecs", "{secs}s left", "剩 {secs}s"),
+    ("DownloadEtaMins", "{mins}m{secs}s left", "剩 {mins}m{secs}s"),
+    ("DownloadFailedHint", "The Logs page has the full reason.", "完整原因在日志页。"),
+    ("DownloadOpenLogs", "Open logs", "打开日志"),
+    ("DownloadDismiss", "Dismiss", "关闭"),
+    ("DownloadOptionsTitle", "Install options", "安装选项"),
+    ("DownloadOptionsLoaderVersion", "Loader version", "加载器版本"),
+    ("DownloadOptionsLoaderVersionsLoading", "Fetching loader versions…", "正在获取加载器版本…"),
+    ("DownloadOptionsLoaderVersionsFailed", "Could not fetch loader versions: {reason}", "取不到加载器版本：{reason}"),
+    ("DownloadOptionsLoaderVersionsEmpty", "No loader builds published for {version}", "官方没有为 {version} 发布加载器版本"),
+    ("DownloadOptionsInstanceName", "Instance name", "实例名"),
+    ("DownloadOptionsInstanceNameHint", "Empty = use the version id", "留空就用版本号"),
+    ("DownloadOptionsIncompatible", "{loader} has no builds for {version}", "{loader} 没有适配 {version} 的构建"),
+    ("DownloadOptionsNeedsAtLeast", "{loader} needs Minecraft {min} or newer", "{loader} 需要 Minecraft {min} 或更新"),
+    ("DownloadOptionsLiteLoaderVanillaOnly", "Vanilla parent only — Forge goes through the CLI", "只叠原版；叠 Forge 请走命令行"),
+    ("DownloadCancelled", "Install cancelled — finished files are kept, the instance was not created", "安装已取消 —— 已下好的文件保留，实例未登记"),
+    ("LogsSubtitleIdle", "Nothing is running right now", "当前没有运行中的实例"),
+    ("LogsStatus", "{instance} · {when} · {outcome}", "{instance}｜{when}｜{outcome}"),
+    ("LogsOpenFolder", "Open folder", "打开目录"),
+    ("LogsClear", "Clear", "清空"),
+    ("LogsOutputTitle", "OUTPUT", "输出"),
+    ("LogsDiagnosisTitle", "DIAGNOSIS", "诊断"),
+    ("LogsConfidenceHigh", "HIGH CONFIDENCE", "高置信度"),
+    ("LogsConfidenceMedium", "MEDIUM CONFIDENCE", "中置信度"),
+    ("LogsConfidenceLow", "LOW CONFIDENCE", "低置信度"),
+    ("LogsSubtitleLive", "Running now — logs stream as they arrive", "正在运行 — 日志实时滚动"),
+    ("LogsConfidence", "Confidence {percent}%", "置信度 {percent}%"),
+    ("LogsSuggestedFix", "Suggested fix", "建议动作"),
+    ("LogsSummaryLabel", "One-line summary", "一行摘要"),
+    ("LogsCopySummary", "Copy summary", "复制摘要"),
+    ("LogsEmptyTitle", "No output yet", "还没有输出"),
+    ("LogsEmptyBody", "Logs stream here while the launcher or the game is running. Pick an instance and start it to see the first lines.", "启动器或游戏运行时，日志会实时出现在这里。选择一个实例并启动，就能看到第一批日志。"),
+    ("LogsEmptyAction", "Choose an instance", "选择实例"),
+    ("CrashDialogTitleFailed", "Launch failed", "启动失败"),
+    ("CrashDialogTitleCrashed", "The game crashed", "游戏崩溃"),
+    ("CrashDialogExitCode", "Exit code {code}", "退出码 {code}"),
+    ("CrashDialogStartedThenDied", "The game process started, then exited abnormally.", "游戏进程起来了，随后异常退出。"),
+    ("CrashDialogSilentFailure", "The game exited with code 0 but never really started.", "游戏以退出码 0 结束，但并没有真正起来。"),
+    ("CrashDialogStageReason", "It failed before the game could start: {stage}", "游戏还没起来就失败了：{stage}"),
+    ("CrashDialogCrashReportFound", "The game wrote a crash report — the details are below.", "游戏写出了崩溃报告，详见下方说明。"),
+    ("CrashDialogNoGameLog", "No crash report this time: the game stopped before it could write one. The last lines the launcher captured are below.", "这次没有生成崩溃报告：游戏还没来得及写就停了。下面是启动器捕获的最后若干行。"),
+    ("CrashDialogNoLogAtAll", "No crash report and no captured output. Most likely: missing Java, not enough memory, wrong launch arguments, or missing libraries.", "既没有崩溃报告，也没有捕获到输出。最可能的原因：缺少 Java、内存不足、启动参数错误、或库文件缺失。"),
+    ("CrashDialogShowDetail", "Show crash details", "展开崩溃说明"),
+    ("CrashDialogHideDetail", "Hide crash details", "收起崩溃说明"),
+    ("CrashDialogLauncherLogs", "Launcher logs", "启动器日志"),
+    ("CrashDialogSessionLog", "This session", "本次会话"),
+    ("CrashDialogGameLog", "Game latest.log", "游戏 latest.log"),
+    ("CrashDialogCrashReports", "Crash reports", "崩溃报告目录"),
+    ("CrashDialogCapturedTail", "CAPTURED OUTPUT (last {count} lines)", "捕获输出（最后 {count} 行）"),
+    ("CrashDialogExport", "Export report bundle", "导出诊断包"),
+    ("CrashDialogOpenFolder", "Open log folder", "打开日志文件夹"),
+    ("CrashDialogCopyPaths", "Copy file paths", "复制文件路径"),
+    ("CrashDialogClose", "Close", "关闭"),
+    ("CrashDialogCopied", "File paths copied to the clipboard", "文件路径已复制到剪贴板"),
+    ("CrashDialogExportDone", "Exported {bytes} bytes to {path}", "已导出 {bytes} 字节到 {path}"),
+    ("CrashDialogExportFailed", "Export failed: {error}", "导出失败：{error}"),
+    ("CrashDialogExportTruncated", "{count} file(s) were too large and are truncated (head + tail kept).", "有 {count} 个文件太大，已截断（保留头 + 尾）。"),
+    ("CrashDialogOpenFailed", "Could not open the folder: {error}", "打不开文件夹：{error}"),
+    ("AgentTitle", "Assistant", "助手"),
+    ("AgentSubtitle", "Simulated assistant · no real model is connected", "模拟助手 · 还没接真实模型"),
+    ("AgentCollapse", "Collapse", "收起"),
+    ("AgentDetach", "Pop out", "拆出"),
+    ("AgentDock", "Dock back", "收回"),
+    ("AgentOpen", "Open assistant", "打开助手"),
+    ("AgentStripLabel", "AI", "助手"),
+    ("AgentSend", "Send", "发送"),
+    ("AgentStop", "Stop", "中断"),
+    ("AgentPlaceholder", "Message the simulated assistant…", "给模拟助手发消息…"),
+    ("AgentEmptyTitle", "Nothing in this session yet", "这个会话还没有内容"),
+    ("AgentEmptyBody", "Ask about instances, downloads or logs. This assistant is simulated: no real model is connected.", "可以问实例、下载或日志。当前是模拟助手，没有接真实模型。"),
+    ("AgentNotePending", "Placeholder shell: your message is kept here, nothing was sent to a model.", "占位外壳：消息留在这里，没有发给任何模型。"),
+    ("AgentNoteStopped", "Stopped by you.", "你中断了这次回复。"),
+    ("AgentUnread", "{count} unread", "{count} 条未读"),
+    ("AgentResize", "Drag to resize the assistant rail", "拖动调整助手栏宽度"),
+    ("AgentWidthLabel", "Width {width}", "宽度 {width}"),
+    ("AgentRoleYou", "You", "你"),
+    ("AgentRoleAssistant", "Assistant", "助手"),
+    ("AgentRoleNotice", "Notice", "提示"),
+    ("AgentErrorTitle", "Assistant error", "助手出错"),
+    ("AgentErrorUnavailable", "Couldn't reach the assistant backend. Check the endpoint, then try again.", "连不上助手后端：检查端点后重试。"),
+    ("AgentErrorNotImplemented", "This assistant request isn't wired up yet.", "这个助手请求还没接线。"),
+    ("AgentConfirmRequest", "The assistant wants to change something: {summary}", "助手想改一项设置：{summary}"),
+    ("AgentConfirmAllow", "Allow", "允许"),
+    ("AgentConfirmDeny", "Deny", "拒绝"),
+    ("AgentSimulated", "Simulated", "模拟"),
+    ("AgentSubtitleReal", "Conversation", "会话"),
+    ("AgentPlaceholderReal", "Message the assistant…", "给助手发消息…"),
+    ("AgentEmptyBodyReal", "Ask about instances, downloads or logs.", "可以问实例、下载或日志。"),
+    ("SettingsLanguageFollowSystem", "Follow system", "跟随系统"),
+    ("SettingsLanguageZhCn", "Chinese (Simplified)", "简体中文"),
+    ("SettingsLanguageEn", "English", "英文"),
+    ("SettingsLanguageEffective", "Interface right now: {language}", "界面当前使用：{language}"),
+    ("SettingsTheme", "Theme", "主题"),
+    ("SettingsThemeFollowSystem", "Follow system", "跟随系统"),
+    ("SettingsThemeInk", "Ink", "Ink（深色）"),
+    ("SettingsThemeSilver", "Silver", "Silver（浅色）"),
+    (
+        "SettingsThemeHint",
+        "Ink is the dark scheme, Silver the light one. Follow system picks between them as Windows switches.",
+        "Ink 是深色主方案，Silver 是浅色主方案；跟随系统会随 Windows 的深浅在这两块之间切换。",
+    ),
+    ("SettingsStartupPage", "Startup page", "启动页"),
+    ("SettingsStartupInstances", "Instances", "实例"),
+    ("SettingsCloseButton", "Close button", "关闭按钮"),
+    ("SettingsCloseToTray", "Exit to tray", "退出到托盘"),
+    ("SettingsSubtitle", "Launcher behaviour, Java runtimes and download sources", "启动器行为、Java 运行时与下载源"),
+    ("SettingsResetSection", "Reset section", "重置本组"),
+    ("SettingsSave", "Save", "保存"),
+    ("NavAi", "Assistant", "助手"),
+    ("SettingsGroupGeneral", "General", "通用"),
+    ("SettingsGroupAppearance", "Appearance", "外观"),
+    ("SettingsGroupJava", "Java", "Java 运行时"),
+    ("SettingsGroupDownloads", "Downloads", "下载"),
+    ("AgentFallbackBody", "The assistant page is not built yet. Chat lives in the docked panel once the AI mission lands; this screen is the M68 skeleton fallback.", "助手页还没做。AI 接线落地后对话会出现在右侧停靠面板；这一屏是 M68 的骨架回退。"),
+    ("VersionRailTitle", "Version type", "版本类型"),
+    ("VersionMajorTitle", "Major version", "主版本"),
+    ("VersionMajorAll", "All versions", "全部版本"),
+    ("VersionSearchPlaceholder", "Search version numbers", "搜版本号"),
+    ("VersionSearchClear", "Clear search", "清空搜索"),
+    ("VersionSearchHits", "{count} matches", "{count} 个匹配"),
+    ("VersionSearchEmptyTitle", "No matching versions", "没有匹配的版本"),
+    ("VersionSearchEmptyBody", "Try a shorter piece of the number — 1.21, 24w, a1.", "试试更短的片段 — 1.21、24w、a1。"),
+    ("VersionSearchElsewhere", "{count} versions match, but they are in another type.", "有 {count} 个版本匹配，但它们在别的类型里。"),
+    ("VersionSearchElsewhereAction", "Show all types", "看全部类型"),
+    ("VersionSearchHitsOne", "1 match", "1 个匹配"),
+    ("VersionSearchElsewhereTitle", "Found in another type", "在别的类型里找到了"),
+    ("VersionSearchElsewhereOne", "1 version matches, but it is in another type.", "有 1 个版本匹配，但它在别的类型里。"),
+    ("ContentTitle", "Content", "内容库"),
+    ("ContentSubtitle", "Modpacks, mods, resource packs and shaders", "整合包、Mod、资源包与光影"),
+    ("ContentSectionVersions", "Version management", "版本管理"),
+    ("ContentSectionContent", "Content library", "内容库"),
+    ("ContentKindModpack", "Modpacks", "整合包"),
+    ("ContentKindMod", "Mods", "Mod"),
+    ("ContentKindResourcepack", "Resource packs", "资源包"),
+    ("ContentKindShader", "Shaders", "光影"),
+    ("ContentSourceModrinth", "Modrinth", "Modrinth 源"),
+    ("ContentSourceCurseforge", "CurseForge", "CurseForge 源"),
+    ("ContentSortRelevance", "Relevance", "相关度"),
+    ("ContentSortDownloads", "Downloads", "下载量"),
+    ("ContentSortNewest", "Newest", "最新发布"),
+    ("ContentSortUpdated", "Recently updated", "最近更新"),
+    ("ContentSearchPlaceholder", "Search content…", "搜索内容…"),
+    ("ContentSearch", "Search", "搜索"),
+    ("ContentFilterVersion", "Game version", "游戏版本"),
+    ("ContentFilterLoader", "Loader", "加载器"),
+    ("ContentFilterAny", "Any", "不限"),
+    ("ContentCount", "{count} results", "{count} 个结果"),
+    ("ContentLoading", "Loading content…", "正在加载内容…"),
+    ("ContentLoadingHint", "Results come from the network; nothing is cached offline yet.", "结果来自网络，暂时没有离线缓存。"),
+    ("ContentEmptyTitle", "Nothing matched", "没有匹配的内容"),
+    ("ContentEmptyBody", "Try another keyword, or clear a filter.", "换个关键词，或清掉一个筛选条件。"),
+    ("ContentFailedTitle", "Could not load content", "内容加载失败"),
+    ("ContentFailedBody", "Check the network, then retry.", "检查网络后重试。"),
+    ("ContentOfflineTitle", "No connection", "未联网"),
+    ("ContentOfflineBody", "Content search needs the network. Check your connection, then retry.", "内容检索需要联网。检查网络后重试。"),
+    ("ContentRetry", "Retry", "重试"),
+    ("ContentLoadMore", "Load more", "加载更多"),
+    ("ContentNoMore", "No more results", "没有更多了"),
+    ("ContentDetailEmpty", "Pick an item to see what it supports.", "选一个项目看它支持什么。"),
+    ("ContentDetailDownloads", "{count} downloads", "下载量 {count}"),
+    ("ContentDetailUpdated", "Updated {date}", "更新于 {date}"),
+    ("ContentDetailLoaders", "Loaders: {list}", "加载器：{list}"),
+    ("ContentDetailVersions", "Game versions: {list}", "游戏版本：{list}"),
+    ("ContentDetailFetching", "Loading versions…", "正在取版本列表…"),
+    ("ContentDetailFetchFailed", "Could not load versions: {reason}", "版本列表取不到：{reason}"),
+    ("ContentDetailVersionCount", "{count} versions", "{count} 个版本"),
+    ("ContentDetailVersionLine", "{number} · {kind} · {date}", "{number}（{kind}）· {date}"),
+    ("ContentInstall", "Install into instance", "装入实例"),
+    ("ContentTargetInstance", "Target instance", "目标实例"),
+    ("ContentNoInstances", "No instance to install into", "没有可装入的实例"),
+    ("ContentIncompatibleVersion", "Needs {version}; this instance runs {actual}", "需要 {version}，该实例运行的是 {actual}"),
+    ("ContentIncompatibleLoader", "Not built for {loader}", "不支持 {loader}"),
+    ("ContentModpackNotReady", "Installing modpacks from the library into an instance is not available yet", "从内容库一键安装整合包到实例还没做（本地的包可以直接导入）"),
+    ("ContentSourceUnavailable", "CurseForge needs an API key: add one in Settings", "CurseForge 需要在设置里配置密钥才能搜索"),
+    ("ContentSourceNotWired", "Installing from CurseForge is not available yet", "CurseForge 来源的安装尚未开放"),
+    ("ContentInstallFailedTitle", "Install did not finish — {count} items failed", "安装未完成 —— {count} 项没装上"),
+    ("ContentInstallRetryIncompatible", "Not available for this version/loader", "不兼容所选版本/加载器"),
+    ("ContentInstallRetryUnreachable", "Could not fetch (network or missing project)", "取不到（网络 / 项目不存在）"),
+    ("ContentInstallRetryOnly", "Retry just these {count}", "只重试这 {count} 个"),
+    ("ContentInstallRetryHint", "Retry asks again only for the items above; files that already landed stay put.", "重试只重新解析上面这几项，已落盘的文件不动。"),
+    ("PackTitle", "Modpack import & export", "整合包导入 / 导出"),
+    ("PackImportTitle", "Import a modpack", "导入整合包"),
+    ("PackDropHint", "Drop a .mrpack, .zip or a MultiMC/Prism instance folder here", "把 .mrpack / .zip 或 MultiMC·Prism 实例目录拖到这里"),
+    ("PackDropActive", "Release to probe the pack", "松手开始探测"),
+    ("PackNoDialog", "This build has no system file picker: drag the file in, or paste its path below.", "本版没有系统文件选择框：请把文件拖进来，或在下面粘贴路径。"),
+    ("PackPathLabel", "Pack path", "整合包路径"),
+    ("PackPathPlaceholder", "D:\\packs\\Better MC.mrpack", "D:\\整合包\\更好的MC.mrpack"),
+];

crates/i18n/src/catalog/instances.rs

@@ -0,0 +1,223 @@
+//! 实例页文案：页头、列表列头、详情动作、元信息卡的标签与值、运行状态与启动阶段。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+//!
+//! ## 这一族在装配链的**第 2 位**（M120 钉住）
+//!
+//! `instances_entries!` 紧跟 `nav_entries!`，所以本族的 key 落在 `Key::ALL` 的前段、
+//! `LoaderVanilla` 之前。M120 的新 key 因此**追加在本域末尾**（= `InstancesEmptyBody` 之后），
+//! 既没插到别的族中间，也没为了「排在文件末尾」去重排别人的族：
+//! 金表（[`crate::catalog::golden`]）是 `Key::ALL` 的逐 index 镜像，位置跟着族走。
+//!
+//! ## M120 之前这七条全是**死 key**
+//!
+//! M117 加 `InstancesNew` / `InstancesImport` / `InstancesBack` / `InstancesPlay` /
+//! `InstancesLastPlayed` / `InstancesEmptyTitle` / `InstancesEmptyBody` 时，实例页并没有接它们
+//! ——页面上还是英文基线字面量（`"New instance"` / `"ALL INSTANCES"` / `"Present on disk"`…）。
+//! M120 一次接完，同时：
+//!
+//! - `InstancesEmptyBody` 的译文换成详情列真正画的那句（原来那句是「看详情」的泛说）；
+//! - **`InstancesLastPlayed` 删掉**：它的形状是「上一次游玩 {when}」这种整句，而页面上是
+//!   元信息卡（标签 `LAST PLAYED` + 值 `2026-10-29 19:22 UTC`，或值 `Never`）。留着它只会
+//!   多出一条没人用的 key，所以拆成 [`Key::InstancesMetaLastPlayed`]（标签）与
+//!   [`Key::InstancesNeverPlayed`]（值）。
+//!
+//! ## 两条口径（复审会盯）
+//!
+//! 1. **品牌与技术标识不翻译**：`Java`（元信息标签的值域）与 `pid`（进程号）原样保留两套语言；
+//! 2. **数字与分隔符不随语言变形**：[`Key::InstancesRunning`] 的中英都写成
+//!    `… · pid {pid}`，只有前半句换了；`{pid}` 之外一个字都不许动（`pages/instances/tests/i18n.rs`
+//!    用「中英同位置取占位符 + 数字原样」的断言钉这条）。
+
+macro_rules! instances_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 实例页（M117 的七条：其中 `InstancesLastPlayed` 见模块文档，M120 删除）
+            InstancesNew => ("New instance", "新建实例"),
+            InstancesImport => ("Import", "导入"),
+            InstancesBack => ("Back to instances", "返回实例列表"),
+            InstancesPlay => ("Play", "启动"),
+            InstancesEmptyTitle => ("No instance selected", "未选择实例"),
+            InstancesEmptyBody => ("Pick an instance on the left to see its version, loader and launch options.", "在左侧选择一个实例，查看它的版本、加载器与启动选项。"),
+            // ── 页头与列表列头（M120）
+            InstancesTitle => ("Instances", "实例"),
+            InstancesSubtitle => ("Local versions and their mod loaders", "本地版本与它们的模组加载器"),
+            InstancesAllTitle => ("ALL INSTANCES", "全部实例"),
+            // ── 详情动作（M120）
+            InstancesStop => ("Stop", "停止"),
+            InstancesDuplicate => ("Duplicate", "复制"),
+            InstancesOpenFolder => ("Open folder", "打开文件夹"),
+            InstancesDelete => ("Delete", "删除"),
+            InstancesNarrowNote => (
+                "Below 840 px the list and the detail share one column, so opening an instance replaces this screen (full-page switch). Widen the window to see both panes again.",
+                "窗口窄于 840 像素时，列表与详情共用一列：打开一个实例会整页替换这一屏（整页切换）。把窗口拉宽就能重新同时看见两栏。"
+            ),
+            // ── 元信息卡的标签（M120；`Java` 是品牌名，两套语言都写 Java）
+            InstancesMetaVersion => ("VERSION", "版本"),
+            InstancesMetaLoader => ("LOADER", "加载器"),
+            InstancesMetaMemory => ("MEMORY", "内存"),
+            InstancesMetaJava => ("JAVA", "Java"),
+            InstancesMetaMods => ("MODS", "模组"),
+            InstancesMetaIsolation => ("ISOLATION", "隔离方式"),
+            InstancesMetaVersionId => ("VERSION ID", "版本标识"),
+            InstancesMetaFiles => ("FILES", "文件"),
+            InstancesMetaLastPlayed => ("LAST PLAYED", "上次游玩"),
+            // ── 元信息卡的值（M120）
+            InstancesPresentOnDisk => ("Present on disk", "已在磁盘上"),
+            InstancesMissing => ("Missing", "缺失"),
+            InstancesNeverPlayed => ("Never", "从未游玩"),
+            // 隔离档位的两个稳定 id（`core::game::IsolationMode::as_str`）→ 人话。
+            // 白名单只覆盖真实存在的这两档；`inherit` / `custom` / 未知值原样上屏（不猜）。
+            InstancesIsolationIsolated => ("Isolated", "独立目录"),
+            InstancesIsolationShared => ("Shared", "共用目录"),
+            // ── 运行状态与启动阶段（M120；数字与分隔符不随语言变形）
+            InstancesRunning => ("Running · pid {pid}", "运行中 · pid {pid}"),
+            // 失败状态行的**框架**：`{reason}` 是「哪一步」或「结局」的短句
+            // （M161 复审 P1-1：「起来了又崩」与「没起来」必须能说出不同的话）。
+            InstancesFailed => ("Launch failed · {reason}", "启动失败 · {reason}"),
+            InstancesCrashed => ("the game crashed (exit {code})", "游戏崩溃（退出码 {code}）"),
+            // 单行列表行也要放得下（`Launch failed · ` + 这一句 ≤ 行宽），
+            // 「exit 0 却没起来」这一条信息必须留（复审 P1-1 第 ③ 条）。
+            InstancesSilentFailed => ("exit 0, but never started", "退出码 0，没起来"),
+            InstancesStageDownload => ("Downloading", "下载中"),
+            InstancesStageVerify => ("Verifying", "校验中"),
+            InstancesStageLaunch => ("Starting", "启动中"),
+            InstancesStageWindow => ("Waiting for window", "等待游戏窗口"),
+            // ── 启动参数区（M157）：实例配置页的五项 + 三态后端 + 门槛提示
+            InstancesLaunchTitle => ("LAUNCH OPTIONS", "启动参数"),
+            InstancesLaunchJvm => ("JVM arguments", "JVM 参数"),
+            InstancesLaunchJvmHint => ("Space separated, quotes allowed. Empty = follow the global extra JVM arguments (both are sent; on duplicates the instance wins).", "空格分隔、支持引号。留空 = 跟随全局附加 JVM 参数（两者叠加下发，同名选项实例赢）。"),
+            InstancesLaunchGame => ("Game arguments", "游戏参数"),
+            InstancesLaunchGameHint => ("Appended last, so they override earlier game arguments. Empty = nothing appended.", "追加在命令行最后，可覆盖前面的游戏参数。留空 = 不追加。"),
+            InstancesLaunchMemory => ("Max memory (MiB)", "最大内存（MiB）"),
+            InstancesLaunchMemoryHint => ("Empty = follow the global default ({default} MiB).", "留空 = 跟随全局默认（{default} MiB）。"),
+            InstancesLaunchJava => ("Java executable", "Java 可执行文件"),
+            InstancesLaunchJavaHint => ("Empty = follow the global setting, then auto-pick (managed > JAVA_HOME > PATH).", "留空 = 跟随全局设置，再退到自动挑选（托管 > 环境变量 > 系统路径）。"),
+            InstancesLaunchBackend => ("Graphics backend", "图形后端"),
+            InstancesLaunchBackendGated => ("Requires MC {min}+ (this instance: {version}). The flag is not sent on this version.", "需游戏版本 {min} 及以上（本实例 {version}），这个版本不会下发该参数。"),
+            InstancesLaunchEffective => ("Effective: {value}", "生效：{value}"),
+            InstancesBackendDefault => ("Default", "默认"),
+            InstancesBackendOpengl => ("OpenGL", "OpenGL 后端"),
+            InstancesBackendVulkan => ("Vulkan", "Vulkan 后端"),
+            InstancesLaunchSave => ("Save", "保存"),
+            InstancesLaunchReset => ("Reset to global", "恢复跟随全局"),
+
+            // ── 导入已有版本（M223）：向导的全部文案
+            AdoptTitle => ("Import an existing version", "导入已有版本"),
+            AdoptSubtitle => ("Register versions another launcher already installed. Nothing is copied: versions, libraries and assets stay where they are.", "把别的启动器已经装好的版本登记成实例。不复制任何东西：versions / libraries / assets 原地不动。"),
+            AdoptScanning => ("Scanning versions/…", "正在扫描 versions/…"),
+            AdoptEmpty => ("No version found under {dir}. Install one here, or point the game folder at the .minecraft another launcher uses.", "在 {dir} 下一个版本都没找到。可以用本启动器装一个，或者把游戏目录指向别的启动器用的那个 .minecraft。"),
+            AdoptSelectLabel => ("Pick a version", "选择版本"),
+            AdoptReady => ("Ready", "可导入"),
+            AdoptBlocked => ("{count} problem(s)", "{count} 个问题"),
+            AdoptRegistered => ("Already used by {name}", "已被 {name} 使用"),
+            AdoptTargetLabel => ("Where should the game run?", "游戏在哪个目录里跑"),
+            AdoptTargetInstanceDir => ("New folder in ULL data (default)", "ULL 数据区新建目录（缺省）"),
+            AdoptTargetInstanceDirHint => ("mods, saves and config stay out of the other launcher's .minecraft", "mods / saves / config 不会落进别人的 .minecraft"),
+            AdoptTargetShared => ("Share the game folder", "共用游戏目录"),
+            AdoptTargetSharedHint => ("mods, saves and config are written into the other launcher's .minecraft", "mods / saves / config 会写进别人的 .minecraft"),
+            AdoptTargetVersionDir => ("Use the version folder", "用版本目录"),
+            AdoptTargetVersionDirHint => ("player data grows inside versions/<id>", "玩家数据会长在 versions/<id> 里"),
+            AdoptNameLabel => ("Instance name (empty = version id)", "实例名（留空 = 版本 id）"),
+            AdoptPreview => ("Check", "预检"),
+            AdoptConfirm => ("Import", "导入"),
+            AdoptBack => ("Back", "返回"),
+            AdoptClose => ("Close", "关闭"),
+            AdoptPlanTitle => ("Ready to import", "可以导入"),
+            AdoptPlanRunDir => ("Game folder", "运行目录"),
+            AdoptPlanIsolation => ("Isolation", "隔离方式"),
+            AdoptFailureTitle => ("Import failed", "导入失败"),
+            AdoptProblemCount => ("Every reason is listed below:", "全部原因如下："),
+            AdoptInstanceName => ("Instance name", "实例名"),
+            AdoptDoneTitle => ("Imported", "已导入"),
+            AdoptDoneHint => ("It is in the instance list now. Player data will live in the game folder below.", "它已经出现在实例列表里；玩家数据会落在下面这个运行目录。"),
+            // ── MODS 区（M224）：本地 mod 列表 + 启停开关。
+            // `mods` 是**目录名**（文件系统事实，不翻译），所以中文那栏里也出现它；
+            // 页面守门的 ALLOWED 里因此有一条 `mods`（见 `pages/instances/tests/i18n.rs`）。
+            InstancesModsTitle => ("MODS", "模组"),
+            InstancesModsCount => ("{enabled} enabled · {disabled} disabled", "{enabled} 启用 · {disabled} 禁用"),
+            InstancesModsLoading => ("Reading mods/…", "正在读取 mods/…"),
+            InstancesModsEmpty => ("No mods here yet — put jars into mods/ and they show up.", "这里还没有模组——把模组文件放进 mods/ 就会出现在这里。"),
+            InstancesModsMissingDir => ("This instance has no mods/ directory yet.", "这个实例还没有 mods/ 目录。"),
+            InstancesModsRunning => ("The game is running — toggles are read-only until it exits.", "游戏正在运行——退出前开关只读。"),
+            InstancesModsOldBadge => ("legacy file", "旧版本残留"),
+            InstancesModsSkipped => ("{count} entries skipped", "跳过 {count} 项"),
+            InstancesModsFailed => ("Could not read mods/: {reason}", "读取 mods/ 失败：{reason}"),
+            InstancesModsToggleFailed => ("Could not toggle {file}: {reason}", "启停 {file} 失败：{reason}"),
+            // 启停失败的**具名原因**（`ModFailureKind` → 一句话；`{detail}` 是 OS 原文，只进括号）
+            InstancesModsReasonRunning => ("the game is running", "游戏正在运行"),
+            InstancesModsReasonInstance => ("the instance is gone", "实例已不存在"),
+            InstancesModsReasonName => ("the file name is not usable", "文件名不可用"),
+            InstancesModsReasonDirectory => ("there is no usable mods/ directory", "没有可用的 mods/ 目录"),
+            InstancesModsReasonMissing => ("the file is gone", "文件已不在"),
+            InstancesModsReasonNotFile => ("that is not a regular file", "那不是普通文件"),
+            InstancesModsReasonCollision => ("a file with that name already exists", "同名文件已存在"),
+            InstancesModsReasonRename => ("the rename failed", "改名失败"),
+            // ── 存档区（M235 · STOREMVP 读路径 / M247 · SAVESOPS 写操作）。
+            // M235 那条「这一版只读」（`InstancesSavesReadOnly`）**已删**：写操作接上之后它是假的，
+            // 边界改由 core 的 `game::saves::write::boundary` 守（越界 / 符号链接 / 撞名都在那里拒）。
+            // `saves/` / `screenshots/` 是**目录名**，两套语言都原样保留（与 MODS 区的 `mods` 同一条口径）。
+            InstancesSavesTitle => ("SAVES", "存档"),
+            InstancesSavesCount => ("{worlds} worlds · {shots} screenshots", "{worlds} 个世界 · {shots} 张截图"),
+            InstancesSavesLoading => ("Reading saves/…", "正在读取 saves/…"),
+            InstancesSavesEmpty => ("No worlds or screenshots yet — play once and they show up here.", "还没有世界或截图——玩一次就会出现在这里。"),
+            InstancesSavesMissingDir => ("This instance has no saves/ or screenshots/ directory yet.", "这个实例还没有 saves/ 或 screenshots/ 目录。"),
+            InstancesSavesWorlds => ("WORLDS", "世界"),
+            InstancesSavesScreenshots => ("SCREENSHOTS", "截图"),
+            InstancesSavesNoWorlds => ("No worlds yet.", "还没有世界。"),
+            InstancesSavesNoScreenshots => ("No screenshots yet.", "还没有截图。"),
+            InstancesSavesWorldIcon => ("has icon", "有图标"),
+            InstancesSavesTimeUnknown => ("time unknown", "时间未知"),
+            InstancesSavesSkipped => ("{count} entries skipped", "跳过 {count} 项"),
+            InstancesSavesOpenFolder => ("Open saves folder", "打开存档文件夹"),
+            InstancesSavesRetry => ("Retry", "重试"),
+            InstancesSavesFailed => ("Could not read saves/: {reason}", "读取 saves/ 失败：{reason}"),
+            InstancesSavesOpenFailed => ("Could not open the folder: {reason}", "打开文件夹失败：{reason}"),
+            InstancesSavesReasonDir => ("the directory is not usable", "目录不可用"),
+            InstancesSavesReasonInstance => ("the instance is gone", "实例已不存在"),
+            InstancesSavesReasonOpen => ("the file manager did not start", "文件管理器没起来"),
+            // ── 存档**写操作**（M247 · SAVESOPS）：重命名 / 删除（二次确认）/ 备份导出。
+            // M235 那条「这一版只读」的 `InstancesSavesReadOnly` **已删**：写操作接上之后它就是假的
+            // （金表同步少了那一行，不是重排）。删除确认框的三句是**不可逆动作**的兜底，不许省。
+            InstancesSavesRename => ("Rename", "重命名"),
+            InstancesSavesBackup => ("Back up", "备份"),
+            InstancesSavesDelete => ("Delete", "删除"),
+            InstancesSavesRenamePlaceholder => ("New name for this world", "这个世界的新名字"),
+            InstancesSavesRenameConfirm => ("Rename", "改名"),
+            InstancesSavesCancel => ("Cancel", "取消"),
+            InstancesSavesBusy => ("Working…", "正在处理…"),
+            InstancesSavesDeleteTitle => ("Delete this world?", "删除这个世界？"),
+            InstancesSavesDeleteBody => ("{dir} and everything inside it will be deleted. This cannot be undone.", "{dir} 和它里面的全部内容都会被删除，且不能撤销。"),
+            InstancesSavesDeleteConfirm => ("Delete world", "删除世界"),
+            InstancesSavesRenamed => ("Renamed {from} → {to}.", "已把 {from} 改名为 {to}。"),
+            InstancesSavesDeleted => ("Deleted {dir}.", "已删除 {dir}。"),
+            InstancesSavesBackedUp => ("Backed up {dir} to {path} ({size}).", "已把 {dir} 备份到 {path}（{size}）。"),
+            InstancesSavesBackupSkipped => ("{count} symlinks skipped", "跳过 {count} 个符号链接"),
+            InstancesSavesRenameFailed => ("Could not rename {file}: {reason}", "重命名 {file} 失败：{reason}"),
+            InstancesSavesDeleteFailed => ("Could not delete {file}: {reason}", "删除 {file} 失败：{reason}"),
+            InstancesSavesBackupFailed => ("Could not back up {file}: {reason}", "备份 {file} 失败：{reason}"),
+            InstancesSavesReasonUnsafeName => ("the name is not usable", "名字不可用"),
+            InstancesSavesReasonSymlink => ("that path is a symbolic link (not followed)", "那个路径是符号链接（不跟随）"),
+            InstancesSavesReasonMissing => ("the world is gone", "那个世界已不在"),
+            InstancesSavesReasonNotDir => ("that is not a directory", "那不是目录"),
+            InstancesSavesReasonConflict => ("a world with that name already exists", "同名世界已存在"),
+            InstancesSavesReasonBoundary => ("that path is outside saves/", "那个路径落在 saves/ 之外"),
+            InstancesSavesReasonTooLarge => ("the world is too large for one zip", "这个世界太大，一个 zip 装不下"),
+            InstancesSavesReasonWrite => ("the write failed", "写盘失败"),
+            // 实例在启动/运行中：三个写操作**主动不写盘**（不是"写盘失败"——Linux 上删一个正在跑的
+            // 世界是会成功的，所以这条要直说"先退出"，别让用户以为是权限问题）。
+            InstancesSavesReasonRunning => ("the game is running (exit it first)", "游戏正在运行（先退出再操作）"),
+            // ── 截图**缩略图**（M251 · SAVESHOTS，D54）。
+            // 四句都是「这一格为什么没有图」：没轮到（超 60 张预算）/ 太大 / 读不出 / 解不出。
+            // 第 1 句与后三句分开是刻意的——"没生成"与"生成了但失败"对用户的含义不同，
+            // 前者点一下刷新可能就有了，后者得用户自己去动文件。
+            InstancesSavesPreviewNone => ("no preview", "未生成预览"),
+            InstancesSavesPreviewTooLarge => ("too large for a preview (over 8 MiB)", "文件过大，未生成预览（超过 8 MiB）"),
+            InstancesSavesPreviewUnreadable => ("the file could not be read", "读不出这张图"),
+            InstancesSavesPreviewDecode => ("not a decodable image", "解不出这张图（可能已损坏或格式不支持）"),
+        } }
+    };
+}
+
+pub(crate) use instances_entries;

crates/i18n/src/catalog/launch.rs

@@ -0,0 +1,70 @@
+//! 启动结局文案：一句话 = 一个 key（原来 UI 把 `"Launch failed"` 与 core 的「静默失败」拼成一句话）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! launch_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 启动结局（原来 UI 把 "Launch failed" 与 core 的「静默失败」拼成一句话，现在一句话 = 一个 key）
+            LaunchOutcomeNormal => ("Finished normally", "正常结束"),
+            LaunchOutcomeCrash => ("The game crashed", "游戏崩溃"),
+            LaunchOutcomeSilent => (
+                "Suspected silent failure: exit code 0, but the game never really started",
+                "疑似静默失败：退出码 0，但游戏没真正跑起来"
+            ),
+            LaunchFailedWithCode => ("Launch failed (exit {code}): {reason}", "启动失败（退出码 {code}）：{reason}"),
+            // M161：启动失败的**阶段**词表。presenter 只给稳定 slug
+            // （`LaunchFailureStage`），界面在这里选词——此前这些前缀是 presenter 里拼的中文
+            // （「读版本 JSON 失败」「隔离目录派生失败」…），英文界面上原样露出来。
+            LaunchStageVersionManifest => ("Reading the version file", "读版本文件"),
+            LaunchStageInheritance => ("Resolving the inheritance chain", "解析继承链"),
+            LaunchStageInstanceConfig => ("Reading the instance settings", "读实例设置"),
+            LaunchStageIsolation => ("Preparing the isolated game folder", "准备隔离游戏目录"),
+            LaunchStageIdentity => ("Preparing the account", "准备账户"),
+            LaunchStageSpawn => ("Starting the game process", "启动游戏进程"),
+            LaunchStageFailed => ("Launch failed · {stage}: {detail}", "启动失败 · {stage}：{detail}"),
+            LaunchToastEnded => ("{outcome} · {seconds}s", "{outcome} · {seconds} 秒"),
+            // M117：微软轨的 client id 没配是**配置缺失**，不是「本期未支持」。这句话是那条
+            // 启动失败文案的**双语口径**（真源在 `core::auth::microsoft` 的
+            // `MISSING_CLIENT_ID_MESSAGE`，中文逐字一致；英文这条给 En 界面用）。
+            // 判据：中英都点名 `ULL_MSA_CLIENT_ID` 并给出构建期注入这条路，且**不许**出现
+            // 「unsupported / 未支持」——用户实跑就是被那句误导读成「功能没做」。
+            LaunchMsaNotConfigured => (
+                "Microsoft sign-in is not configured: it needs an Azure public client id (the login flow itself is implemented). Build with ULL_MSA_CLIENT_ID=<id>, or set that environment variable before launching.",
+                "微软登录未配置：缺少 Azure 公共客户端 id（登录功能已实现，只差这一项配置）。构建时注入：ULL_MSA_CLIENT_ID=<id> cargo build；或启动前设置同名环境变量 ULL_MSA_CLIENT_ID=<id>。"
+            ),
+        } }
+    };
+}
+
+pub(crate) use launch_entries;
+
+#[cfg(test)]
+mod tests {
+    use crate::{Catalog, Key, Lang};
+
+    #[test]
+    fn msa_not_configured_copy_is_accurate_in_both_languages() {
+        // 抓得住：文案退回「本期未支持」这类说法（M117 用户实跑踩到的原 bug），
+        //         以及两条译文只剩一句「需要 id」却不给怎么配。
+        // 抓不住：读起来顺不顺——那要靠 review 与截图。
+        let en = Catalog::of(Lang::En).text(Key::LaunchMsaNotConfigured);
+        let zh = Catalog::of(Lang::ZhCn).text(Key::LaunchMsaNotConfigured);
+
+        for (tag, text) in [("en", en), ("zh-CN", zh)] {
+            assert!(text.contains("ULL_MSA_CLIENT_ID"), "{tag}: {text}");
+        }
+        assert!(en.contains("client id"), "{en}");
+        assert!(en.contains("not configured"), "{en}");
+        assert!(!en.to_lowercase().contains("unsupported"), "{en}");
+        assert!(!en.to_lowercase().contains("not implemented"), "{en}");
+
+        assert!(zh.contains("客户端 id"), "{zh}");
+        assert!(zh.contains("未配置"), "{zh}");
+        assert!(!zh.contains("未支持"), "{zh}");
+        assert!(!zh.contains("未实现"), "{zh}");
+        // 硬约束：词条里只许出现 `<id>` 占位，不出现真 id（repo 任何文件都不许带）。
+        assert!(en.contains("<id>") && zh.contains("<id>"));
+    }
+}

crates/i18n/src/catalog/loader.rs

@@ -0,0 +1,15 @@
+//! 加载器文案：品牌名不翻译（Fabric / Forge / Quilt 一律原样），只有「原版」是一个词。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! loader_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 加载器（品牌名不翻译：Fabric / Forge / Quilt 一律原样，只有「原版」是词）
+            LoaderVanilla => ("Vanilla", "原版"),
+        } }
+    };
+}
+
+pub(crate) use loader_entries;

crates/i18n/src/catalog/logs.rs

@@ -0,0 +1,66 @@
+//! 日志页文案（M95）。
+//!
+//! 日志页的**界面文案**（标题 / 按钮 / 分组名 / 空态）。诊断结论的正文不在这里：
+//! 那是规则表 `rules.d/*.yaml` 的输出（数据），见 `pages/logs/diagnostic.rs` 的模块文档。
+//!
+//! `LogsStatus` 是**模板**：中英差别落在分隔符上（中文用全角竖线——`·` 是外来符号，
+//! 中文正文里偏挤；这也让「中文目录必须与英文不同」这条守卫成立，不是为过测试硬造差异）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! logs_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // --- logs page (M95) ---
+            LogsSubtitleIdle => ("Nothing is running right now", "当前没有运行中的实例"),
+            LogsStatus => ("{instance} · {when} · {outcome}", "{instance}｜{when}｜{outcome}"),
+            LogsOpenFolder => ("Open folder", "打开目录"),
+            LogsClear => ("Clear", "清空"),
+            LogsOutputTitle => ("OUTPUT", "输出"),
+            LogsDiagnosisTitle => ("DIAGNOSIS", "诊断"),
+            LogsConfidenceHigh => ("HIGH CONFIDENCE", "高置信度"),
+            LogsConfidenceMedium => ("MEDIUM CONFIDENCE", "中置信度"),
+            LogsConfidenceLow => ("LOW CONFIDENCE", "低置信度"),
+            LogsSubtitleLive => ("Running now — logs stream as they arrive", "正在运行 — 日志实时滚动"),
+            LogsConfidence => ("Confidence {percent}%", "置信度 {percent}%"),
+            LogsSuggestedFix => ("Suggested fix", "建议动作"),
+            LogsSummaryLabel => ("One-line summary", "一行摘要"),
+            LogsCopySummary => ("Copy summary", "复制摘要"),
+            LogsEmptyTitle => ("No output yet", "还没有输出"),
+            LogsEmptyBody => (
+                "Logs stream here while the launcher or the game is running. Pick an instance and start it to see the first lines.",
+                "启动器或游戏运行时，日志会实时出现在这里。选择一个实例并启动，就能看到第一批日志。"
+            ),
+            LogsEmptyAction => ("Choose an instance", "选择实例"),
+            // --- 启动失败弹窗（M187）---
+            CrashDialogTitleFailed => ("Launch failed", "启动失败"),
+            CrashDialogTitleCrashed => ("The game crashed", "游戏崩溃"),
+            CrashDialogExitCode => ("Exit code {code}", "退出码 {code}"),
+            CrashDialogStartedThenDied => ("The game process started, then exited abnormally.", "游戏进程起来了，随后异常退出。"),
+            CrashDialogSilentFailure => ("The game exited with code 0 but never really started.", "游戏以退出码 0 结束，但并没有真正起来。"),
+            CrashDialogStageReason => ("It failed before the game could start: {stage}", "游戏还没起来就失败了：{stage}"),
+            CrashDialogCrashReportFound => ("The game wrote a crash report — the details are below.", "游戏写出了崩溃报告，详见下方说明。"),
+            CrashDialogNoGameLog => ("No crash report this time: the game stopped before it could write one. The last lines the launcher captured are below.", "这次没有生成崩溃报告：游戏还没来得及写就停了。下面是启动器捕获的最后若干行。"),
+            CrashDialogNoLogAtAll => ("No crash report and no captured output. Most likely: missing Java, not enough memory, wrong launch arguments, or missing libraries.", "既没有崩溃报告，也没有捕获到输出。最可能的原因：缺少 Java、内存不足、启动参数错误、或库文件缺失。"),
+            CrashDialogShowDetail => ("Show crash details", "展开崩溃说明"),
+            CrashDialogHideDetail => ("Hide crash details", "收起崩溃说明"),
+            CrashDialogLauncherLogs => ("Launcher logs", "启动器日志"),
+            CrashDialogSessionLog => ("This session", "本次会话"),
+            CrashDialogGameLog => ("Game latest.log", "游戏 latest.log"),
+            CrashDialogCrashReports => ("Crash reports", "崩溃报告目录"),
+            CrashDialogCapturedTail => ("CAPTURED OUTPUT (last {count} lines)", "捕获输出（最后 {count} 行）"),
+            CrashDialogExport => ("Export report bundle", "导出诊断包"),
+            CrashDialogOpenFolder => ("Open log folder", "打开日志文件夹"),
+            CrashDialogCopyPaths => ("Copy file paths", "复制文件路径"),
+            CrashDialogClose => ("Close", "关闭"),
+            CrashDialogCopied => ("File paths copied to the clipboard", "文件路径已复制到剪贴板"),
+            CrashDialogExportDone => ("Exported {bytes} bytes to {path}", "已导出 {bytes} 字节到 {path}"),
+            CrashDialogExportFailed => ("Export failed: {error}", "导出失败：{error}"),
+            CrashDialogExportTruncated => ("{count} file(s) were too large and are truncated (head + tail kept).", "有 {count} 个文件太大，已截断（保留头 + 尾）。"),
+            CrashDialogOpenFailed => ("Could not open the folder: {error}", "打不开文件夹：{error}"),
+        } }
+    };
+}
+
+pub(crate) use logs_entries;

crates/i18n/src/catalog/nav.rs

@@ -0,0 +1,42 @@
+//! 导航文案：四个一级页。AI 独立页没有导航高亮项（`Route::Agent.nav()` 是 `None`），所以没有 key。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节：本宏把条目**追加**到 `$acc` 之后，
+//! 再把「还没装配的域」原样交给 `$next`。条目顺序 = `Key` 的声明顺序（金表 `catalog::golden` 守门）。
+//!
+//! **显示名与标识符不同名**（M108）：`NavDownload` 这条说的是「版本管理」，而它指向的仍是
+//! `Route::Download` / `NavSection::Download`。用户令（2026-11-04）只改**显示层**：全仓重命名
+//! 标识符会与在途的多条线全面撞车，收益只在观感，所以标识符改名后置。
+//!
+//! ## 为什么「版本管理」有两条 key（M108）
+//!
+//! D33 定死了导航两态：**88 收起轨 ⇄ 240 展开抽屉**。88px 里塞得下中文「版本管理」（4 字 ≈48px），
+//! 但塞不下英文 `Version management`（18 字符 ≈101px > 88）——那会变成截断或两行，两个都是视觉缺陷
+//! （两行还要把项高从 52 抬到 68，等于为一个词改全局导航节奏）。
+//!
+//! 所以按**容器宽度**分两条：
+//!
+//! | key | 用在哪 | en | zh-CN |
+//! |---|---|---|---|
+//! | [`NavDownload`] | 88 收起轨（`shell/nav.rs` / `pages/nav.rs`） | `Versions` | 版本管理 |
+//! | [`NavDownloadExpanded`] | 240 展开抽屉（D33 的展开态） | `Version management` | 版本管理 |
+//!
+//! 中文两条**故意同值**：48px 放得下就没有理由为「对称」砍短（那是视觉缺陷，不是风格）。
+//! 英文短名选 `Versions` 而不是 `Versions list` / `Downloads`：单一词最省宽度，且不与「下载」
+//! （真在传文件的动作、设置页的下载分组）混淆。切换点只有 [`crate::catalog`] 的调用方一处，
+//! 见 `pages/nav.rs` 的 `label_key`。
+
+macro_rules! nav_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 导航轨（`pages::Route` 的四项）
+            NavInstances => ("Instances", "实例"),
+            NavDownload => ("Versions", "版本管理"),
+            NavDownloadExpanded => ("Version management", "版本管理"),
+            NavLogs => ("Logs", "日志"),
+            NavSettings => ("Settings", "设置"),
+        } }
+    };
+}
+
+pub(crate) use nav_entries;

crates/i18n/src/catalog/settings/accent.rs

@@ -0,0 +1,48 @@
+//! 设置页「Appearance」分组**强调色**一族的文案（M250 ACCENTWIRE）。
+//!
+//! ## 为什么单开一个域文件，而不是写进 `settings/appearance.rs`
+//!
+//! `settings_appearance_entries` 在装配链**中间**。往那个域后面追加，会把其后所有 key 在
+//! `Key::ALL` 里整体平移 ⇒ 金表（逐 index 逐字节）整片红。本域挂在**链尾**
+//! （`font_install_entries` 之后），于是既有顺序一个不动，金表只需在 `tail2::ROWS` 末尾追加
+//! （M104 / M106 / M107 / M109 / M114 / M159 / M168 都是这条做法）。
+//!
+//! key 前缀仍叫 `SettingsAppearanceAccent*`：`catalog/settings/appearance.rs` 的译文守卫按
+//! **名字前缀**筛 key，改名会让那两条守卫漏掉这一族。
+//!
+//! ## 三档失败原因为什么分开写
+//!
+//! `#12`（位数不足）、`#006A5C00`（位数过多）、`zzzzzz`（非十六进制）是三种不同的手误，
+//! 而「格式不对」对用户没有行动性。分开写之后错行能直接说「现在 2 位」「有非十六进制字符 z」。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! settings_accent_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 强调色（M250：设置页 Appearance 组的第一个控件）
+            SettingsAppearanceAccent => ("Accent colour", "强调色"),
+            SettingsAppearanceAccentPresets => ("Presets", "预设"),
+            SettingsAppearanceAccentFactory => ("Factory", "出厂"),
+            SettingsAppearanceAccentHint => (
+                "Empty = the factory accent from the brand board. A custom accent replaces primary / secondary / tertiary only; neutral surfaces and error colours do not follow it.",
+                "空 = 出厂品牌板的强调色。自定义强调色只替换 primary / secondary / tertiary 三族；中性表面与错误色不随强调色变。"
+            ),
+            SettingsAppearanceAccentShort => (
+                "Accent needs 6 hex digits (RRGGBB); got {digits}.",
+                "强调色要 6 位十六进制（RRGGBB），现在 {digits} 位。"
+            ),
+            SettingsAppearanceAccentLong => (
+                "Accent has {digits} digits; a colour takes exactly 6.",
+                "强调色有 {digits} 位，一个颜色只要 6 位。"
+            ),
+            SettingsAppearanceAccentDigit => (
+                "Accent contains a character that is not a hex digit: {ch}",
+                "强调色里有非十六进制字符：{ch}"
+            ),
+        } }
+    };
+}
+
+pub(crate) use settings_accent_entries;

crates/i18n/src/catalog/settings/ai.rs

@@ -0,0 +1,96 @@
+//! 设置页「助手（AI）」分组文案（M174）：状态矩阵四档 + 五个输入项 + 测试连接六档。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。本域在装配链里排在
+//! `settings_download_entries` 之后、`core_text_entries` 之前（设置页五域的位置），
+//! 所以金表那几行也要插在 `SettingsAppearanceCornerSuspended` 之后——**顺序即 `Key::ALL`**。
+//!
+//! 三条口径：
+//!
+//! 1. **失败四种各写各的句子**（鉴权 / 模型不存在 / 不可达 / 超时）：合成一句「测试失败」等于
+//!    让用户自己猜是 key 错了还是地址错了；
+//! 2. 密钥的**值**永远不进文案：只有 `{chars}`（已存字符数）与「未配置」两种说法；
+//! 3. 技术名词不翻：`base_url` / `OpenAI` / `Anthropic` / `Ollama` 原样。
+
+macro_rules! settings_ai_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 左列分组名（与 NavSettings 同源：左列是导航，标题在正文里）
+            SettingsGroupAssistant => ("Assistant", "助手"),
+            // ── 状态矩阵（未配置 / 已配置 / 已通过 / 测试失败）
+            SettingsAiStatusLabel => ("Status: {status}", "状态：{status}"),
+            SettingsAiStatusUnconfigured => ("not configured", "未配置"),
+            SettingsAiStatusConfigured => ("configured", "已配置"),
+            SettingsAiStatusVerified => ("verified", "连接已通过"),
+            SettingsAiStatusTestFailed => ("test failed", "测试失败"),
+            // ── 开关
+            SettingsAiEnable => ("Enable the assistant", "启用助手"),
+            SettingsAiEnableHint => (
+                "With this off, the assistant stays quiet; crash diagnosis from the rule engine keeps working.",
+                "关掉之后助手不再工作；规则引擎的崩溃诊断照常可用。"
+            ),
+            // ── 提供商
+            SettingsAiProviderLabel => ("Provider", "提供商"),
+            SettingsAiProviderOpenAi => ("OpenAI compatible", "OpenAI 兼容"),
+            SettingsAiProviderAnthropic => ("Anthropic", "Anthropic 原生"),
+            SettingsAiProviderOllama => ("Ollama", "Ollama 原生"),
+            SettingsAiProviderDisabled => ("Disabled", "已禁用"),
+            // ── 端点 / 模型
+            SettingsAiBaseUrl => ("Endpoint (base_url)", "端点（base_url）"),
+            SettingsAiBaseUrlPlaceholder => ("http://127.0.0.1:8080/v1", "例：http://127.0.0.1:8080/v1"),
+            SettingsAiBaseUrlHint => (
+                "The /v1 root of an OpenAI-compatible service. Leave empty to use the provider default.",
+                "OpenAI 兼容服务的 /v1 根地址；留空则用该提供商的默认端点。"
+            ),
+            SettingsAiEffective => ("Effective: {value}", "生效：{value}"),
+            SettingsAiModel => ("Model name", "模型名称"),
+            SettingsAiModelPlaceholder => ("deepseek-chat", "例：deepseek-chat"),
+            // ── 密钥（只有字符数与掩码，没有值）
+            SettingsAiApiKey => ("API key", "API 密钥"),
+            SettingsAiApiKeyPlaceholder => ("Paste the key", "粘贴密钥"),
+            SettingsAiApiKeyConfigured => (
+                "A key is stored ({chars} characters). Leave this empty to keep it.",
+                "已保存密钥（{chars} 个字符）。留空则保持不变。"
+            ),
+            SettingsAiApiKeyMissing => ("No key stored yet", "还没有保存密钥"),
+            SettingsAiShow => ("Show", "显示"),
+            SettingsAiHide => ("Hide", "隐藏"),
+            // ── 动作与回执
+            SettingsAiSave => ("Save", "保存"),
+            SettingsAiTest => ("Test connection", "测试连接"),
+            SettingsAiTesting => ("Testing…", "正在测试…"),
+            SettingsAiSaved => ("Saved. It takes effect immediately, no restart needed.", "已保存，立刻生效，不用重启。"),
+            SettingsAiRefused => ("Not saved: {reason}", "未保存：{reason}"),
+            SettingsAiUnsaved => ("There are unsaved changes.", "有未保存的改动。"),
+            SettingsAiNoStorage => (
+                "No settings file is available in this run, so nothing can be saved or tested.",
+                "这一次运行没有可用的设置文件，保存与测试都做不了。"
+            ),
+            SettingsAiTestDisabled => (
+                "Fill in the missing field before testing: {missing}.",
+                "先补上这一项再测试：{missing}。"
+            ),
+            // ── 缺项（四种各说各的）
+            SettingsAiMissingDisabled => ("the assistant is disabled", "助手处于关闭状态"),
+            SettingsAiMissingBaseUrl => ("the endpoint address", "端点地址"),
+            SettingsAiMissingModel => ("the model name", "模型名称"),
+            SettingsAiMissingApiKey => ("the API key", "API 密钥"),
+            // ── 拒绝保存的原因（本地校验）
+            SettingsAiReasonProvider => ("the provider value is not recognised", "提供商取值不认识"),
+            SettingsAiReasonBaseUrl => ("the endpoint must start with http:// or https://", "端点必须以 http:// 或 https:// 开头"),
+            SettingsAiReasonModel => ("the model name is required", "必须填模型名称"),
+            // ── 测试结论（六档）
+            SettingsAiTestPassed => ("Connected — the endpoint answered.", "连接通过 —— 端点有正常回应。"),
+            SettingsAiTestAuth => ("Authentication failed: the endpoint rejected the key.", "鉴权失败：端点拒绝了这个密钥。"),
+            SettingsAiTestModel => ("The endpoint answered, but this model does not exist.", "端点通了，但没有这个模型。"),
+            SettingsAiTestUnreachable => ("The endpoint is unreachable.", "端点不可达。"),
+            SettingsAiTestTimeout => ("Timed out while waiting for the endpoint.", "等端点回应超时了。"),
+            SettingsAiTestOther => ("The request failed for another reason (see the detail below).", "请求因为别的原因失败了（详情见下）。"),
+            SettingsAiTestNotConfigured => ("Nothing was sent: the configuration is incomplete.", "什么都没有发出去：配置还不完整。"),
+            SettingsAiTestTarget => ("Target: {base_url} · model {model} · {ms} ms", "目标：{base_url} · 模型 {model} · {ms} 毫秒"),
+            SettingsAiTestDetail => ("Detail: {detail}", "详情：{detail}"),
+        } }
+    };
+}
+
+pub(crate) use settings_ai_entries;

crates/i18n/src/catalog/settings/appearance.rs

@@ -0,0 +1,258 @@
+//! 设置页「Appearance」分组文案（M116 落了圆角一族；M180 `I18NAPPEAR` 补齐全组）。
+//!
+//! 加 key 时把条目写进 `$($acc)*` 后面即可（形状见 [`crate::catalog`] 的「域装配」一节）。
+//!
+//! ## 两批 key：圆角（M116）在前，其余（M180）在后
+//!
+//! M116 只落了圆角那 5 条；本分组其余控件（整窗/面板透明度、背景图、填充、暗化、配色来源）
+//! 是 M93 落的，文案一直是英文基线字面量。M172 审计量出这一页 27 处文案里 22 处硬编码、中文界面
+//! 本地化 0/27。M180 把**控件文案 + 运行时诊断 + 配色回落提示**全部搬进本文件：
+//!
+//! | 批次 | 条目 | 来源 |
+//! |---|---|---|
+//! | M116 | `Corner` … `CornerSuspended` | `pages/appearance/section/window.rs` 的圆角一段 |
+//! | M180 | `WindowOpacity` … `PaletteAdjusted` | 卡片各段标签/说明 + `state.rs` / `background.rs` / `palette.rs` 的诊断 prose |
+//!
+//! ## 为什么诊断也在这里（而不是留在 `state.rs`）
+//!
+//! `pages/appearance/state.rs` 已经 390 行、贴着 400 行硬线，放不下任何一张文案表。所以那一层只
+//! 给 **key + 已格式化好的参数**（`background::Note`），句子一律在本文件里。
+//!
+//! ## 数值参数：模板里只有 `{name}`，格式在 Rust 侧做
+//!
+//! [`crate::catalog::Catalog::render`] 只做 `{name}` → 值的字面替换，**不认** `{:.2}` 这类格式说明。
+//! 所以「位置/尺寸/上限」这些数字由调用方先 `format!("{:.2}")` 好再当参数传进来：
+//!
+//! | key | 原字面量 | 现在 |
+//! |---|---|---|
+//! | `SettingsAppearancePanelOpacityForcedValue` | `format!("100% (forced from {:.2})")` | `{requested}` = `format!("{:.2}")` |
+//! | `SettingsAppearanceWindowOpacityHint` | `Floor {:.2}` = `WINDOW_ALPHA_FLOOR` | `{floor}` |
+//! | `SettingsAppearancePanelOpacityHint` | `Floor 0.40` = `PANEL_ALPHA_FLOOR` | `{floor}` |
+//! | `SettingsAppearanceBgDimHint` | `Max 0.95` = `BG_DIM_MAX` | `{max}` |
+//! | `SettingsAppearanceBgTooLarge` | `(limit 8192 px per edge)` = `MAX_SOURCE_EDGE` | `{limit}` |
+//! | `SettingsAppearanceBgSmallTile` | `(max 64 tiles …)` = `MAX_TILES` | `{max}` |
+//!
+//! 常量走占位符而不是写进译文，是为了「改常量不用改两套译文」（M180 任务口径）。
+//!
+//! ## 文案口径（不许暗示所有平台一致）
+//!
+//! 用户定案：Win11 / Server 2025 开系统圆角，Win10 可以不开，其他系统按窗口合成器的默认规则。
+//! 所以说明句必须写清「谁负责画圆」而不是「我们支持圆角」——后半句在 Win10 上是假的。
+
+macro_rules! settings_appearance_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            SettingsAppearanceCorner => ("Window corners", "窗口圆角"),
+            SettingsAppearanceCornerSystem => ("Follow system", "跟随系统"),
+            SettingsAppearanceCornerSquare => ("Square", "直角"),
+            SettingsAppearanceCornerHint => (
+                "On Windows 11 and Server 2025 we ask the system for rounded corners; Windows 10 keeps square corners. On macOS and Linux the desktop's own rules apply. We never draw corners ourselves.",
+                "Windows 11 与 Windows Server 2025 上我们请求系统处理外框圆角；Windows 10 保持直角；macOS 与 Linux 交给桌面合成器自己的规则；我们不自己画圆角。"
+            ),
+            SettingsAppearanceCornerSuspended => (
+                "Not in effect right now: window transparency is below 100%. Setting it back to 100% restores the rounded corners.",
+                "当前因整窗透明度不生效：把整窗透明度调回 100% 圆角即恢复。"
+            ),
+            // ---- M180 `I18NAPPEAR`：卡片内文案（① 整窗 / ③ 面板 / ④~⑧ 背景图 / ⑨ 配色来源）
+            SettingsAppearanceWindowOpacity => ("Window transparency", "整窗透明度"),
+            SettingsAppearanceWindowOpacityHint => (
+                "Applies to the whole window. Floor {floor}; 1.00 = fully opaque.",
+                "作用于整个窗口。下限 {floor}；1.00 = 完全不透明。"
+            ),
+            SettingsAppearancePanelOpacity => ("Panel transparency", "面板透明度"),
+            SettingsAppearancePanelOpacityHint => (
+                "Only the panel/card layer. Floor {floor}; independent of window transparency.",
+                "只作用于面板 / 卡片这一层。下限 {floor}；与整窗透明度互不影响。"
+            ),
+            SettingsAppearancePanelOpacityForcedValue => (
+                "100% (forced from {requested})",
+                "100%（强制，原请求值 {requested}）"
+            ),
+            SettingsAppearancePanelOpacityForcedHint => (
+                "Software renderer: panels and glass stay fully opaque (window transparency still works).",
+                "软件渲染：面板与玻璃效果恒为不透明（整窗透明度仍然有效）。"
+            ),
+            SettingsAppearanceBackgroundImage => ("Background image", "背景图"),
+            SettingsAppearanceOff => ("Off", "关"),
+            SettingsAppearanceOn => ("On", "开"),
+            SettingsAppearanceImagePath => ("Image path", "图片路径"),
+            SettingsAppearancePaletteLevel => ("Colours: {level}", "配色：{level}"),
+            SettingsAppearanceBgFill => ("Fill", "填充方式"),
+            SettingsAppearanceBgFillCover => ("Cover", "铺满"),
+            SettingsAppearanceBgFillContain => ("Contain", "完整显示"),
+            SettingsAppearanceBgFillTile => ("Tile", "平铺"),
+            SettingsAppearanceBgDim => ("Dim", "暗化"),
+            SettingsAppearanceBgDimHint => (
+                "Blends the image toward the panel colour so text stays readable. Max {max}.",
+                "把背景图往面板底色上退，让文字读得清。上限 {max}。"
+            ),
+            SettingsAppearancePaletteSource => ("Colour source", "配色来源"),
+            SettingsAppearancePaletteBackground => ("Background", "取自背景图"),
+            SettingsAppearancePaletteWallpaper => ("Wallpaper", "取自壁纸"),
+            SettingsAppearancePalettePreset => ("Preset", "内置色卡"),
+            // ---- M180：运行时诊断（`background.rs` 的三种读盘失败 + 小图平铺）。
+            //
+            // M180 r1 复审 P2-1：软件渲染那句**只有一条**，就挂在面板那一行（`PanelOpacityForcedHint`）
+            // 上——它挨着被禁用的滑块，正好回答「为什么拖不动」；这里不再有第二句。
+            SettingsAppearanceBgReadFailed => (
+                "Background image could not be read: {reason}",
+                "背景图读不出来：{reason}"
+            ),
+            SettingsAppearanceBgDecodeFailed => (
+                "Background image could not be decoded ({reason}; this build decodes PNG, JPEG and BMP)",
+                "背景图解不开（{reason}；这个构建只支持 PNG、JPEG 与 BMP）"
+            ),
+            SettingsAppearanceBgTooLarge => (
+                "Background image is too large to decode: {width}×{height} (limit {limit} px per edge)",
+                "背景图太大，解不开：{width}×{height}（每边上限 {limit} 像素）"
+            ),
+            SettingsAppearanceBgSmallTile => (
+                "Small image ({width}×{height}): tiles are scaled up so the window stays covered (max {max} tiles, no gaps).",
+                "图片很小（{width}×{height}）：图块会被放大，保证窗口铺满（最多 {max} 块，不留缝）。"
+            ),
+            // ---- M180：配色回落提示（`palette.rs` 把 design 的 `hint_key()` 翻成下面这些）
+            SettingsAppearancePaletteBgUndecodable => (
+                "Background image could not be read; colours fall back.",
+                "背景图读不出来，配色回落到下一级。"
+            ),
+            SettingsAppearancePaletteBgTooSmall => (
+                "Background image is too small to sample; colours fall back.",
+                "背景图太小，取不了色，配色回落到下一级。"
+            ),
+            SettingsAppearancePaletteBgBadDimensions => (
+                "Background image data looks inconsistent; colours fall back.",
+                "背景图数据前后不一致，配色回落到下一级。"
+            ),
+            SettingsAppearancePaletteBgNoOpaquePixels => (
+                "Background image is almost fully transparent; colours fall back.",
+                "背景图几乎全透明，配色回落到下一级。"
+            ),
+            SettingsAppearancePaletteBgLowChroma => (
+                "Background image is too monochrome to tint from; colours fall back.",
+                "背景图太单调（彩度不足），取不出配色，回落到下一级。"
+            ),
+            SettingsAppearancePaletteBgContrast => (
+                "Background image colours would be unreadable; colours fall back.",
+                "按背景图取的颜色读不清，配色回落到下一级。"
+            ),
+            SettingsAppearancePaletteWallpaperUndecodable => (
+                "Desktop wallpaper could not be read.",
+                "桌面壁纸读不出来。"
+            ),
+            SettingsAppearancePaletteWallpaperTooSmall => (
+                "Desktop wallpaper is too small to sample.",
+                "桌面壁纸太小，取不了色。"
+            ),
+            SettingsAppearancePaletteWallpaperBadDimensions => (
+                "Desktop wallpaper data looks inconsistent.",
+                "桌面壁纸数据前后不一致。"
+            ),
+            SettingsAppearancePaletteWallpaperNoOpaquePixels => (
+                "Desktop wallpaper is almost fully transparent.",
+                "桌面壁纸几乎全透明。"
+            ),
+            SettingsAppearancePaletteWallpaperLowChroma => (
+                "Desktop wallpaper is too monochrome to tint from.",
+                "桌面壁纸太单调（彩度不足），取不出配色。"
+            ),
+            SettingsAppearancePaletteWallpaperContrast => (
+                "Desktop wallpaper colours would be unreadable; colours fall back.",
+                "按桌面壁纸取的颜色读不清，配色回落到下一级。"
+            ),
+            SettingsAppearancePalettePresetContrast => (
+                "The built-in card needed a small contrast correction.",
+                "内置色卡做了一点对比度修正。"
+            ),
+            SettingsAppearancePaletteAdjusted => (
+                "A few colours were nudged for readability.",
+                "有几个颜色为了可读性做了微调。"
+            ),
+        } }
+    };
+}
+
+pub(crate) use settings_appearance_entries;
+
+#[cfg(test)]
+mod tests {
+    use crate::catalog::{placeholders, Catalog, Key};
+    use crate::Lang;
+
+    /// 本域的 key（`Key::ALL` 里按名字前缀筛；不手工列表，漏一条就少一条守卫）。
+    fn appearance_keys() -> Vec<Key> {
+        Key::ALL
+            .iter()
+            .copied()
+            .filter(|key| key.name().starts_with("SettingsAppearance"))
+            .collect()
+    }
+
+    /// 有没有汉字（与 `pages/settings/tests/appearance_section.rs` 的 `is_han` 同一段码位）。
+    fn is_han(ch: char) -> bool {
+        ('\u{4e00}'..='\u{9fff}').contains(&ch)
+    }
+
+    /// **M180 守门 ②**：外观分组的每条 key 都必须真翻过——英文照抄进中文表就地判红。
+    ///
+    /// 抓得住：① 新加 key 时中文栏直接抄英文（`chinese_catalog_is_actually_chinese` 也抓这条，
+    /// 但那条在 `catalog/tests.rs`、不属于本 mission 的 scope，而且不查「中文字里有没有汉字」）；
+    /// ② 中文译文变成纯 ASCII（比如只写了 `PNG` / `Preset` 这种专名）；③ 占位符集合两边不一致
+    /// （`{floor}` 只在一边有 ⇒ `render()` 吐出半截句子）。
+    /// 抓不住：译文翻得对不对（语义只能人审）。
+    ///
+    /// 变异证明：把任一条的第二个字符串换成第一个（`("Cover", "Cover")`）⇒ 本条立刻红（`assert_ne!`
+    /// 与 `is_han` 命中同一行）。
+    #[test]
+    fn every_appearance_key_is_translated_into_chinese() {
+        let keys = appearance_keys();
+        assert!(
+            keys.len() >= 40,
+            "外观分组至少 40 条 key（M180 落地时是 45 条），实际 {}：\
+             key 被搬走或前缀改名了？",
+            keys.len()
+        );
+
+        let en = Catalog::of(Lang::En);
+        let zh = Catalog::of(Lang::ZhCn);
+        for key in keys {
+            let (english, chinese) = (en.text(key), zh.text(key));
+            assert_ne!(english, chinese, "{} 的中文是英文照抄", key.name());
+            assert!(
+                chinese.chars().any(is_han),
+                "{} 的中文里一个汉字都没有：{chinese}",
+                key.name()
+            );
+            let mut left = placeholders(english);
+            let mut right = placeholders(chinese);
+            left.sort_unstable();
+            right.sort_unstable();
+            assert_eq!(left, right, "{} 的占位符两套译文不一致", key.name());
+        }
+    }
+
+    /// 数值参数必须走占位符，不许把常量写进译文（改常量时不该还要改两套译文）。
+    #[test]
+    fn numeric_limits_are_placeholders_not_text() {
+        let en = Catalog::of(Lang::En);
+        for (key, needle, placeholder) in [
+            (Key::SettingsAppearanceWindowOpacityHint, "0.08", "floor"),
+            (Key::SettingsAppearancePanelOpacityHint, "0.40", "floor"),
+            (Key::SettingsAppearanceBgDimHint, "0.95", "max"),
+            (Key::SettingsAppearanceBgTooLarge, "8192", "limit"),
+            (Key::SettingsAppearanceBgSmallTile, "64", "max"),
+        ] {
+            let text = en.text(key);
+            assert!(
+                !text.contains(needle),
+                "{} 把常量 {needle} 写死在译文里了（应当走 {{{placeholder}}}）",
+                key.name()
+            );
+            assert!(
+                placeholders(text).contains(&placeholder),
+                "{} 缺 {{{placeholder}}} 占位符：{text}",
+                key.name()
+            );
+        }
+    }
+}

crates/i18n/src/catalog/settings/download.rs

@@ -0,0 +1,24 @@
+//! 设置页「Downloads」分组文案（M201 起有内容：这一组接了真控件）。
+//!
+//! 加 key 时把条目写进 `$($acc)*` 后面即可（形状见 [`crate::catalog`] 的「域装配」一节）。
+//! 本域在装配链里排在 `settings_java_entries` 之后、`settings_ai_entries` 之前，所以金表那几行
+//! 也落在 `SettingsJavaReasonInstallRootTooLong` 与 `SettingsGroupAssistant` 之间。
+//!
+//! ## 只有一条 key 的理由
+//!
+//! 下载组的**行文案**（`并发数` / `单源尝试次数` / 「原值 9999 已按出厂 8 生效」这些）不在这里：
+//! 它们由 presenter 按 schema 键现算（`dto::SettingRowView::label` / `description`），因为那些句子
+//! 里带着**生效值**——把数字搬进静态目录只会再长出一份会说谎的文案。这一域只放「页面自己的
+//! 按钮词」：提交文本框那一下的「应用」。
+
+macro_rules! settings_download_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 文本行的提交按钮（`pages/settings/download.rs` 的 text 行）
+            SettingsDownloadsApply => ("Apply", "应用"),
+        } }
+    };
+}
+
+pub(crate) use settings_download_entries;

crates/i18n/src/catalog/settings/general.rs

@@ -0,0 +1,30 @@
+//! 设置页「General」分组文案：语言（Theme / Startup page / Close button 的 key 还没建）。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。
+
+macro_rules! settings_general_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 设置
+            SettingsLanguage => ("Language", "界面语言"),
+            SettingsLanguageHint => (
+                "Switches the interface language. Chinese text needs a Chinese font.",
+                "切换界面语言。显示中文需要中文字体。"
+            ),
+            // ── 日志文件夹（M188：用户投诉「找不到崩溃日志」的直接落点）
+            SettingsLogsFolder => ("Log folder", "日志文件夹"),
+            SettingsLogsFolderHint => (
+                "What explains a crash lives here: the launcher's own runtime log (launcher.log, rolled over at 1 MiB with one old copy kept) and one jsonl per game session under logs/game/. Sessions from older versions (data/agent/sessions) are still read, not moved.",
+                "解释一次崩溃要看的东西都在这：启动器自己的运行日志（launcher.log，满 1 MiB 滚动一次、只留一份旧档）与每次游戏会话的 jsonl（logs/game/）。旧版本留下的会话（data/agent/sessions）仍然读得出来，不会被搬动。"
+            ),
+            SettingsLogsCopy => ("Copy path", "复制路径"),
+            SettingsLogsUnknown => (
+                "Data directory not resolved — restart the launcher from its own folder",
+                "数据根没解析出来——从启动器所在目录重新启动试试"
+            ),
+        } }
+    };
+}
+
+pub(crate) use settings_general_entries;

crates/i18n/src/catalog/settings/java.rs

@@ -0,0 +1,323 @@
+//! 设置页「Java」分组文案（M175）：扫描 / 运行时列表 / 默认 JDK / 内存 / JVM 参数。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节。本域在装配链里排在
+//! `settings_appearance_entries` 之后、`settings_download_entries` 之前，所以金表那批行要插在
+//! `SettingsAppearanceCornerSuspended` 之后、`SettingsGroupAssistant`（M174 的助手域）之前
+//! ——**顺序即 `Key::ALL`**。
+//!
+//! 三条口径：
+//!
+//! 1. 技术名词不翻：`JDK` / `JVM` / `-version` / `bin/java` / `java.selected_path` 原样；
+//! 2. **不许出现写死的版本号或数字**：本组以前那三行（`Temurin 21.0.4` / `4 GiB`）正是被用户
+//!    当成假数据的那三条，现在所有数值都由页面从真读盘的结果里格式化进来；
+//! 3. 拒绝原因一句一条（空 / 不存在 / 不是 java / 跑不出 -version / 重复），合成一句
+//!    「路径无效」等于让用户自己猜。
+
+macro_rules! settings_java_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 扫描（状态 / 进度 / 取消）
+            SettingsJavaScan => ("Scan now", "立即扫描"),
+            SettingsJavaScanningStart => ("Scanning…", "正在扫描…"),
+            SettingsJavaScanning => ("Scanning… {done}/{total}", "正在扫描… {done}/{total}"),
+            SettingsJavaCancelling => ("Cancelling…", "正在取消…"),
+            SettingsJavaCancel => ("Cancel", "取消"),
+            SettingsJavaCancelled => (
+                "The scan was cancelled; the list below is from the previous run.",
+                "扫描已取消；下面的列表还是上一次的结果。"
+            ),
+            SettingsJavaScanDone => ("{count} JDK found", "找到 {count} 个 JDK"),
+            SettingsJavaNeverScanned => ("Not scanned yet", "还没扫描过"),
+            SettingsJavaNeverScannedBody => (
+                "The list is still empty. The launcher scans once by itself when the settings page opens; press Scan now to look again right away.",
+                "列表还是空的。打开设置页时启动器会自己扫一次；也可以点「立即扫描」立刻再扫一遍。"
+            ),
+            SettingsJavaEmptyTitle => ("No Java runtime found", "未检测到 Java 运行时"),
+            SettingsJavaEmptyBody => (
+                "Nothing matched. Add the path of a JDK you already unpacked below, or install one with ull java install 21 on the command line.",
+                "没找到任何 JDK。可以在下面手动加上你自己解压的那份，或者用命令行 ull java install 21 装一个。"
+            ),
+            // ── 运行时列表
+            SettingsJavaDefault => ("Default", "默认"),
+            SettingsJavaSetDefault => ("Use as default", "设为默认"),
+            SettingsJavaFits => ("Meets the current instance requirement", "满足当前实例的要求"),
+            SettingsJavaTooOld => (
+                "Below the requirement: this instance needs Java {minimum}+",
+                "低于要求：当前实例需要 Java {minimum} 及以上"
+            ),
+            SettingsJavaDefaultSet => ("Default JDK is now {path}", "默认 JDK 已设为 {path}"),
+            SettingsJavaSourceManaged => ("installed by this launcher", "本启动器安装"),
+            SettingsJavaSourceEnv => ("JAVA_HOME (environment variable)", "JAVA_HOME（环境变量）"),
+            SettingsJavaSourcePath => ("on PATH", "PATH 上"),
+            SettingsJavaSourceSystem => ("system install", "系统安装"),
+            SettingsJavaSourceManual => ("added by you", "手动添加"),
+            // ── 手动添加
+            SettingsJavaAdd => ("Add a JDK path", "手动添加 JDK 路径"),
+            SettingsJavaAddPlaceholder => (
+                "C:\\Program Files\\Java\\jdk-21",
+                "例：C:\\Program Files\\Java\\jdk-21"
+            ),
+            SettingsJavaAddHint => (
+                "A JDK folder or its java executable. We run java -version on it; anything that cannot answer is refused.",
+                "JDK 目录或它的 java 可执行文件。会真跑一次 java -version；答不出话的一律拒绝。"
+            ),
+            SettingsJavaAddAction => ("Add", "添加"),
+            SettingsJavaAdded => ("Added {path}", "已添加 {path}"),
+            // ── 内存
+            SettingsJavaMemory => ("Default memory (MB)", "默认内存（MB）"),
+            SettingsJavaMemoryHint => (
+                "Whole megabytes, {min}–{max}. Instances without their own override follow this value.",
+                "整数 MB，范围 {min}~{max}。没有实例级覆盖的实例都用它。"
+            ),
+            SettingsJavaLayerGlobal => (
+                "In effect: {mb} MB, from the global default.",
+                "生效：{mb} MB，来自全局默认值。"
+            ),
+            SettingsJavaLayerInstance => (
+                "In effect: {mb} MB, set by instance {instance}. Changing the global value below will not affect that instance.",
+                "生效：{mb} MB，由实例 {instance} 覆盖。改下面的全局值不会影响它。"
+            ),
+            // ── JVM 参数
+            SettingsJavaJvm => ("Extra JVM arguments", "额外 JVM 参数"),
+            SettingsJavaJvmPlaceholder => ("-XX:+UseG1GC -Dfile.encoding=UTF-8", "例：-XX:+UseG1GC -Dfile.encoding=UTF-8"),
+            SettingsJavaJvmHint => (
+                "Separated by spaces, quotes allowed. Appended to the command line of every launch; an instance's own JVM arguments come after it.",
+                "按空白分隔，支持引号。会拼到每次启动的命令行上；实例自己的 JVM 参数排在它后面。"
+            ),
+            SettingsJavaJvmSaved => ("Saved value: {value}", "已保存的值：{value}"),
+            SettingsJavaJvmSavedNone => (
+                "No extra JVM arguments are saved yet.",
+                "还没有保存任何额外参数。"
+            ),
+            // ── 保存与回执
+            SettingsJavaSave => ("Save", "保存"),
+            SettingsJavaSaved => (
+                "Saved and read back from disk. The next launch uses the new value.",
+                "已保存，并从磁盘读回确认。下次启动就用新值。"
+            ),
+            SettingsJavaUnsaved => ("There are unsaved changes.", "有未保存的改动。"),
+            SettingsJavaRefused => ("Not saved: {reason}", "未保存：{reason}"),
+            SettingsJavaSkipNotDirty => (
+                "there was nothing to change, so no file was written",
+                "没有任何改动，因此没有写文件"
+            ),
+            SettingsJavaSkipReadOnly => (
+                "the settings file is read-only: a newer launcher wrote it, or it is marked untrusted",
+                "配置文件只读：它被更新版本的启动器写过，或被标记为不可信"
+            ),
+            SettingsJavaSkipUnreadable => (
+                "the settings file is untrusted, so it is treated as read-only",
+                "配置文件不可信，因此按只读处理"
+            ),
+            SettingsJavaNoStorage => (
+                "No settings file is available in this run, so nothing can be scanned or saved.",
+                "这一次运行没有可用的设置文件，扫描与保存都做不了。"
+            ),
+            // ── 拒绝原因（一条一句）
+            SettingsJavaReasonMemoryEmpty => ("the memory field is empty", "内存没填"),
+            SettingsJavaReasonMemoryNotNumber => ("the memory must be a whole number of MB", "内存必须是整数 MB"),
+            SettingsJavaReasonMemoryRange => (
+                "the memory is outside the allowed range",
+                "内存超出允许范围"
+            ),
+            SettingsJavaReasonJvmQuotes => (
+                "the JVM arguments have an unclosed quote",
+                "JVM 参数里有没配对的引号"
+            ),
+            SettingsJavaReasonJvmTooLong => (
+                "the JVM arguments are longer than the settings file allows (1024 characters)",
+                "JVM 参数超过配置文件允许的长度（1024 字符）"
+            ),
+            SettingsJavaReasonAddEmpty => ("the path is empty", "路径是空的"),
+            SettingsJavaReasonAddMissing => ("nothing exists at that path", "那个路径上什么都没有"),
+            SettingsJavaReasonAddNotJava => (
+                "there is no java executable at that path",
+                "那个路径里没有 java 可执行文件"
+            ),
+            SettingsJavaReasonAddNoVersion => (
+                "java -version did not answer there, so it is not a usable JDK",
+                "在那里跑不出 java -version，不是一份能用的 JDK"
+            ),
+            SettingsJavaReasonAddTooLong => (
+                "the path is too long to be a JDK location",
+                "路径太长，不像是一个 JDK 位置"
+            ),
+            SettingsJavaReasonAddWriteFailed => (
+                "the JDK is fine, but the list file could not be written (disk or permission)",
+                "这份 JDK 没问题，但名单文件写不进去（磁盘或权限）"
+            ),
+            SettingsJavaReasonAddDuplicate => ("that JDK is already in the list", "这份 JDK 已经在列表里了"),
+            SettingsJavaReasonWriteFailed => (
+                "the settings file could not be written (disk full, no permission, or the value was rejected)",
+                "设置写不进去（磁盘满、没权限，或这个值被拒绝）"
+            ),
+            // ── M197：版本与实例要求的匹配（两向）
+            SettingsJavaTooNew => (
+                "Above the requirement: this instance can only use Java {maximum} or older (the old loader cannot read newer class files)",
+                "高于要求：当前实例只能用 Java {maximum} 及以下（老加载器吃不了新 class 文件）"
+            ),
+            // ── M197：下载一个 JDK（版本目录 / 下载中 / 失败三态）
+            SettingsJavaDownloadTitle => ("Download a JDK", "下载一个 JDK"),
+            SettingsJavaDownloadHint => (
+                "Downloads go through the built-in mirror table: in China the campus mirrors are tried first (Temurin over Tsinghua TUNA), and GitHub-hosted archives are fetched through gh-proxy. Every archive is verified against its SHA-256 before it is unpacked.",
+                "下载走内置镜像表：国内先试院校镜像（Temurin 走清华 TUNA），GitHub 上的归档套 gh-proxy。落盘前一律按 SHA-256 校验。"
+            ),
+            SettingsJavaDownloadLts => ("LTS", "长期支持版（LTS）"),
+            SettingsJavaDownloadBaseline => ("Recommended baseline", "推荐基准版本"),
+            SettingsJavaDownloadVendors => ("Vendors: {vendors}", "发行版：{vendors}"),
+            SettingsJavaDownloadNoVendor => (
+                "No vendor publishes this major version on this platform.",
+                "这个平台上没有发行版发这个大版本。"
+            ),
+            SettingsJavaDownloadAction => ("Install", "安装"),
+            SettingsJavaDownloadReinstall => ("Install again", "重装"),
+            SettingsJavaDownloadInstalled => ("Already installed: {path}", "已安装：{path}"),
+            SettingsJavaDownloadNeeded => (
+                "The current instance needs {requirement}.",
+                "当前实例需要 {requirement}。"
+            ),
+            SettingsJavaDownloadFits => (
+                "Usable by the current instance",
+                "当前实例可用"
+            ),
+            SettingsJavaDownloadTooLow => (
+                "The current instance needs Java {minimum} or newer, so installing this one will not start it.",
+                "当前实例需要 Java {minimum} 及以上 —— 装这一档也起不来。"
+            ),
+            SettingsJavaDownloadTooHigh => (
+                "The current instance can only use Java {maximum} or older, so installing this one will not start it.",
+                "当前实例只能用 Java {maximum} 及以下 —— 装这一档也起不来。"
+            ),
+            SettingsJavaDownloadRecommended => (
+                "Recommended for the current instance",
+                "为当前实例推荐这一档"
+            ),
+            SettingsJavaDownloadBusy => ("Installing Java {major}…", "正在安装 Java {major}…"),
+            SettingsJavaDownloadPhasePreparing => ("Looking up the release…", "正在查版本…"),
+            SettingsJavaDownloadPhaseDownloading => (
+                "Downloading {percent}% ({done} of {total})",
+                "下载中 {percent}%（{done} / {total}）"
+            ),
+            SettingsJavaDownloadPhaseVerifying => ("Verifying the archive…", "正在校验归档…"),
+            SettingsJavaDownloadPhaseExtracting => ("Unpacking…", "正在解压…"),
+            SettingsJavaDownloadSource => ("Source: {source}", "来源：{source}"),
+            SettingsJavaDownloadRetry => (
+                "{source} failed ({reason}); retry {attempt} in {seconds}s",
+                "{source} 失败（{reason}）；{seconds} 秒后重试第 {attempt} 次"
+            ),
+            SettingsJavaDownloadSwitch => ("Switching source: {from} → {to}", "换源：{from} → {to}"),
+            SettingsJavaDownloadDone => (
+                "Java {major} ({vendor}) is ready at {root} · source {source}",
+                "Java {major}（{vendor}）已就绪：{root} · 来源 {source}"
+            ),
+            SettingsJavaDownloadDoneReused => (
+                "Java {major} ({vendor}) was already installed at {root}; nothing was downloaded.",
+                "Java {major}（{vendor}）之前已经装好：{root}，这一次没有下载。"
+            ),
+            SettingsJavaDownloadFailed => (
+                "Java {major} could not be installed; the last source tried was {source}. The full reason is in the log.",
+                "Java {major} 没装成；最后试到的源是 {source}。完整原因在日志里。"
+            ),
+            SettingsJavaDownloadFailedNoSource => (
+                "Java {major} could not be installed: the version lookup itself failed. The full reason is in the log.",
+                "Java {major} 没装成：查版本这一步就失败了。完整原因在日志里。"
+            ),
+            SettingsJavaDownloadFailedHint => (
+                "Check the network, or change the vendor order below.",
+                "先查网络，或者改下面的发行版顺序。"
+            ),
+            SettingsJavaDownloadTriedHeader => ("Sources tried:", "试过的源："),
+            SettingsJavaDownloadTried => ("{source}: {reason}", "{source}：{reason}"),
+            SettingsJavaDownloadRefused => ("Not started: {reason}", "没开始：{reason}"),
+            SettingsJavaReasonDownloadBusy => (
+                "another JDK install is already running",
+                "已经有一个 JDK 在装了"
+            ),
+            SettingsJavaReasonDownloadUnknownMajor => (
+                "that major version is not in the catalog",
+                "目录里没有这个大版本"
+            ),
+            SettingsJavaReasonDownloadNoVendor => (
+                "no vendor publishes that major version here",
+                "没有发行版在这里发这个大版本"
+            ),
+            SettingsJavaReasonRootUnresolved => (
+                "the JDK install folder cannot be resolved on this system",
+                "这台机器上解析不出 JDK 安装目录"
+            ),
+            // ── 源失败原因（结构化，`DownloadErrorKind` 的文案面；core 的原句只进日志）
+            SettingsJavaSourceReasonNotFound => (
+                "this mirror does not have that file (404)",
+                "这个镜像没有这个文件（404）"
+            ),
+            SettingsJavaSourceReasonServer => (
+                "the server answered with a 5xx / 429 error",
+                "服务器报错 5xx / 429"
+            ),
+            SettingsJavaSourceReasonTimeout => ("the request timed out", "请求超时"),
+            SettingsJavaSourceReasonNetwork => ("the connection failed", "连不上"),
+            SettingsJavaSourceReasonIntegrity => ("the checksum did not match", "校验不符"),
+            SettingsJavaSourceReasonIo => ("a local disk error", "本地磁盘错误"),
+            SettingsJavaSourceReasonOther => ("the request was rejected", "请求被拒"),
+            // ── M197：三个设置键（`java.installRoot` / `java.vendorPriority` / `java.auto_install`）
+            SettingsJavaInstallRoot => ("JDK install folder", "JDK 安装目录"),
+            SettingsJavaInstallRootPlaceholder => ("D:\\Java", "例：D:\\Java"),
+            SettingsJavaInstallRootHint => (
+                "Leave it empty to follow the data mode: portable keeps JDKs inside the launcher folder, standard uses the system Java folder. A path here overrides both, and JDKs land in <root>/<vendor>/<version>/.",
+                "留空 = 跟数据目录模式走：portable 放在启动器目录里，standard 放在系统 Java 目录。填了它覆盖前两者，JDK 落在 <root>/<发行方>/<版本>/。"
+            ),
+            SettingsJavaInstallRootEffective => ("In effect: {mode} · {path}", "生效：{mode} · {path}"),
+            SettingsJavaInstallRootLayerSetting => (
+                "this comes from java.installRoot",
+                "这一项来自 java.installRoot"
+            ),
+            SettingsJavaInstallRootLayerDataMode => (
+                "this comes from core.data_mode ({mode})",
+                "这一项来自 core.data_mode（{mode}）"
+            ),
+            SettingsJavaInstallRootUnresolved => (
+                "The system Java folder cannot be resolved here. Type a folder above, or set core.data_mode back to portable.",
+                "这台机器上解析不出系统标准 Java 目录。在上面填一个目录，或把 core.data_mode 改回 portable。"
+            ),
+            SettingsJavaVendorPriority => ("Vendor order", "发行版顺序"),
+            SettingsJavaVendorOrderEffective => ("In effect: {order}", "生效顺序：{order}"),
+            SettingsJavaVendorOrderLayerSetting => (
+                "this comes from java.vendorPriority",
+                "这一项来自 java.vendorPriority"
+            ),
+            SettingsJavaVendorOrderLayerRegion => (
+                "this comes from the built-in order for your region ({region})",
+                "这一项来自内置的地区默认序（{region}）"
+            ),
+            SettingsJavaRegionDomestic => ("China", "国内"),
+            SettingsJavaRegionGlobal => ("rest of the world", "国外"),
+            SettingsJavaVendorUp => ("Up", "上移"),
+            SettingsJavaVendorDown => ("Down", "下移"),
+            SettingsJavaVendorReset => ("Reset to the region default", "恢复地区默认序"),
+            SettingsJavaVendorSupports => ("ships {majors}", "发 {majors}"),
+            SettingsJavaAutoInstall => ("Recommend a JDK when none is found", "缺 JDK 时推荐一档"),
+            SettingsJavaAutoInstallHint => (
+                "On: the catalog below marks the version the current instance needs, and a freshly installed JDK becomes the default when no default is set yet. Nothing is downloaded on its own — you press Install. Off: nothing is marked and you pick everything yourself.",
+                "开：下面的目录会按当前实例的要求标出该装哪一档，装完之后若还没有默认 JDK 就自动设为默认。不会自己开始下载 —— 点「安装」才会下。关：什么也不标，全部自己挑。"
+            ),
+            SettingsJavaAutoInstallOn => ("on", "开"),
+            SettingsJavaAutoInstallOff => ("off", "关"),
+            SettingsJavaPrefsSave => ("Save", "保存"),
+            SettingsJavaPrefsSaved => (
+                "Saved and read back from disk: all three keys are in the settings file.",
+                "已保存并从磁盘读回：三个键都进配置文件了。"
+            ),
+            SettingsJavaPrefsUnsaved => (
+                "There are unsaved changes in this section.",
+                "这一段有未保存的改动。"
+            ),
+            SettingsJavaReasonInstallRootTooLong => (
+                "the folder path is too long",
+                "目录路径太长"
+            ),
+        } }
+    };
+}
+
+pub(crate) use settings_java_entries;

crates/i18n/src/catalog/settings/mod.rs

@@ -0,0 +1,31 @@
+//! 设置页文案：**一个分组一个文件**，与页面侧的 `pages/settings/**` 同构。
+//!
+//! 为什么拆到这个粒度：设置页正文接下来由四条并行 mission 分别接（java / download /
+//! language+appearance / ai+about），它们都会往设置页加 key。一个分组一个文件之后，每条线只改
+//! 自己那个文件，`catalog.rs` 的装配链一行都不用动（链里已经把这五个域接好了）。
+//!
+//! | 文件 | 分组（`pages/settings` 的 `GROUPS`） | 现状 |
+//! |---|---|---|
+//! | [`general`] | General（Language / Theme / Startup page / Close button） | 2 条 key（语言） |
+//! | [`accent`] | Appearance 组的**强调色**一族（M250） | 7 条 key（标签 / 预设 / 三档失败原因 / 说明） |
+//! | [`appearance`] | Appearance（Density / Corner style / Motion / Text scale） | 预留，暂无 key |
+//! | [`java`] | Java（Runtime / Default memory / JVM arguments） | 预留，暂无 key |
+//! | [`download`] | Downloads（Preferred source / Concurrency / Verify checksums） | 预留，暂无 key |
+//! | [`ai`] | AI / About（页面上还没有这个分组） | 预留，暂无 key |
+//!
+//! 「预留」的文件里是**空转移器**（只把累积表原样交给下一个域）：加 key 时把条目写进它
+//! `$($acc)*` 后面即可——签名不用改，`catalog.rs` 不用碰，跨线零冲突。
+
+mod accent;
+mod ai;
+mod appearance;
+mod download;
+mod general;
+mod java;
+
+pub(crate) use accent::settings_accent_entries;
+pub(crate) use ai::settings_ai_entries;
+pub(crate) use appearance::settings_appearance_entries;
+pub(crate) use download::settings_download_entries;
+pub(crate) use general::settings_general_entries;
+pub(crate) use java::settings_java_entries;

crates/i18n/src/catalog/tests.rs

@@ -0,0 +1,252 @@
+//! `Catalog` 的守门测试（从 `catalog.rs` 原样搬出来：那边已经贴着 400 行硬上限，
+//! 而页面每加一批 key 都要在这个模块里占一行）。
+//!
+//! **零改动搬运**：用例、注释、断言一字未动；`use super::*` 指向的仍是 `crate::catalog`。
+//! M94（下载页）与 M95（日志页）几乎同时撞到这堵墙、各自搬了一次：两条 branch 的**用例部分
+//! 逐字相同**（解冲突时按 M94 那份合并，测试数量 7 条不变）。
+
+use super::*;
+
+/// 手写一套**故意缺条**的目录（不经过 `catalog!`，模拟后续 mission 的注入表）。
+const PARTIAL_ZH: &[(Key, &str)] = &[
+    (Key::NavInstances, "实例"),
+    (Key::NavLogs, "日志"),
+    (Key::NavSettings, "设置"),
+    (Key::NavDownload, "下载"),
+    (Key::InstancesNew, "新建实例"),
+    (Key::InstancesImport, "导入"),
+    (Key::InstancesBack, "返回实例列表"),
+    (Key::InstancesPlay, "启动"),
+    (Key::InstancesEmptyTitle, "未选择实例"),
+    (
+        Key::InstancesEmptyBody,
+        "在左侧选择一个实例，查看它的版本、加载器与启动选项。",
+    ),
+    (Key::LoaderVanilla, "原版"),
+    (Key::LaunchOutcomeNormal, "正常结束"),
+    (Key::LaunchOutcomeCrash, "游戏崩溃"),
+    // 缺：LaunchOutcomeSilent / LaunchFailedWithCode / FontCjk* / Settings* / CoreTextUntranslated
+];
+
+#[test]
+fn built_in_catalogs_have_every_key() {
+    // 抓得住：`catalog!` 的成对生成被绕开（有人改回「两套各写一遍」并漏了一条 / 抄重了一条）。
+    //         判据是**集合相等**：`Key` 枚举拦住了「表里有、枚举没有」，这里拦反方向。
+    // 抓不住：译文对不对（这只能是人工 / 后续的语言审查）。
+    for lang in Lang::ALL {
+        let catalog = Catalog::of(*lang);
+        assert_eq!(catalog.missing(), Vec::new(), "{}", catalog.lang().tag());
+        assert_eq!(catalog.diagnose(), None);
+
+        let mut keys = catalog
+            .entries()
+            .iter()
+            .map(|(key, _)| *key)
+            .collect::<Vec<_>>();
+        let total = keys.len();
+        keys.sort_unstable();
+        keys.dedup();
+        assert_eq!(keys.len(), total, "{} 目录里有重复条目", lang.tag());
+        assert_eq!(
+            keys.len(),
+            Key::ALL.len(),
+            "{} 条目数与 key 数不等",
+            lang.tag()
+        );
+
+        for key in Key::ALL {
+            assert!(
+                catalog.get(*key).is_some(),
+                "{} 缺 {}",
+                lang.tag(),
+                key.name()
+            );
+        }
+    }
+    assert!(!Key::ALL.is_empty());
+}
+
+#[test]
+fn key_names_are_unique_and_stable() {
+    // 抓得住：同一个 key 被写成两个变体（名字重复会让日志/诊断指认失准）。
+    // 抓不住：重命名变体对下游源码的影响（那是编译错误，本来就跑不过）。
+    let mut names = Key::ALL.iter().map(|key| key.name()).collect::<Vec<_>>();
+    let total = names.len();
+    names.sort_unstable();
+    names.dedup();
+    assert_eq!(names.len(), total);
+    assert_eq!(Key::NavInstances.name(), "NavInstances");
+}
+
+#[test]
+fn chinese_catalog_is_actually_chinese() {
+    // 抓得住：整句漏译（英文被抄进中文表）；一条都没有说明这张表是真翻过的。
+    // 抓不住：语义翻错、语气不合（机器能查的只有「与英文不同」这一层）。
+    let en = Catalog::of(Lang::En);
+    let zh = Catalog::of(Lang::ZhCn);
+    for key in Key::ALL {
+        let english = en.text(*key);
+        assert_ne!(english, zh.text(*key), "{} 未翻译", key.name());
+        assert!(!english.is_empty() && !zh.text(*key).is_empty());
+    }
+}
+
+#[test]
+fn placeholder_sets_match_across_languages() {
+    // 抓得住：一处文案的 `{code}` / `{when}` 在另一套译文里丢了或写错名——
+    //         那会让 render() 输出半截句子，或让参数静默失效。
+    // 抓不住：占位符本身是不是正确的变量（那是调用方的职责，由页面侧测试守）。
+    let en = Catalog::of(Lang::En);
+    let zh = Catalog::of(Lang::ZhCn);
+    for key in Key::ALL {
+        let mut left = placeholders(en.text(*key));
+        let mut right = placeholders(zh.text(*key));
+        left.sort_unstable();
+        right.sort_unstable();
+        assert_eq!(left, right, "{}", key.name());
+    }
+    assert_eq!(placeholders("exit {code} at {when}"), vec!["code", "when"]);
+    assert_eq!(placeholders("没有占位符"), Vec::<&str>::new());
+}
+
+#[test]
+fn missing_rows_are_diagnosed_in_plain_words() {
+    // 抓得住：缺译诊断的**可读性**（必须点名语言、key 名与英文原文）——注入目录缺条时靠它定位。
+    // 抓不住：内置目录真的缺译（内置表由 catalog! 结构保证，见上一条测试）。
+    let partial = Catalog::from_entries(Lang::ZhCn, PARTIAL_ZH);
+    assert_eq!(partial.missing().len(), Key::ALL.len() - PARTIAL_ZH.len());
+
+    let report = partial.diagnose().expect("应当报缺译");
+    assert!(report.starts_with("zh-CN 缺 "), "{report}");
+    assert!(report.contains("LaunchOutcomeSilent"), "{report}");
+    assert!(
+        report.contains("Suspected silent failure"),
+        "诊断要带上英文原文当参考：{report}"
+    );
+    assert!(
+        !report.contains("NavInstances"),
+        "已译的 key 不该出现在报告里：{report}"
+    );
+}
+
+#[test]
+fn missing_translation_never_falls_back_silently() {
+    // 抓得住：缺译被静默顶替（回落英文 / 回落中文 / 返回空串）——那会产出「半句中文半句英文」的界面。
+    // 抓不住：MISSING 标记真的被画到屏幕上（那是 UI 侧截图验收的事）。
+    let partial = Catalog::from_entries(Lang::ZhCn, PARTIAL_ZH);
+    assert_eq!(partial.get(Key::LaunchOutcomeSilent), None);
+    assert_eq!(partial.text(Key::LaunchOutcomeSilent), MISSING);
+    assert_eq!(
+        partial.render(
+            Key::LaunchFailedWithCode,
+            &[("code", "0"), ("reason", "JVM 拒绝启动")]
+        ),
+        "⟪missing:LaunchFailedWithCode⟫"
+    );
+}
+
+#[test]
+fn render_substitutes_and_keeps_unfilled_placeholders_visible() {
+    // 抓得住：占位符替换的回归（漏参时**保留** `{code}` 而不是清空、不 panic）。
+    // 抓不住：调用方传没传对值（`("code", "0")` 是不是真的退出码）。
+    let zh = Catalog::of(Lang::ZhCn);
+    assert_eq!(
+        zh.render(
+            Key::LaunchFailedWithCode,
+            &[("code", "0"), ("reason", "mod 冲突")]
+        ),
+        "启动失败（退出码 0）：mod 冲突"
+    );
+    assert_eq!(
+        zh.render(Key::LaunchFailedWithCode, &[("code", "0")]),
+        "启动失败（退出码 0）：{reason}"
+    );
+    assert_eq!(zh.text(Key::InstancesNew), "新建实例");
+    assert_eq!(zh.lang(), Lang::ZhCn);
+}
+
+/// M99：把单张条目表按域拆到 `catalog/<域>.rs` 之后，`key -> (en, zh-CN)` 必须**逐条逐字节**不变。
+///
+/// **抓得住**：① 某个 key 整条被搬丢（金表有、现在没有 ⇒ 条数或 key 名对不上）；② 两条 key 的译文
+/// 互抄 / 同 key 被覆盖成别人的译文（该行 en 或 zh 不等）；③ 某条译文改了一个字符（逐字节比，
+/// **不是**数条数——「A 丢了一条、B 复制成两条」条数照旧）；④ 域的顺序被调换（`Key` 的 `Ord` 与
+/// `entries()` 的声明顺序都靠它，金表按原顺序比）。
+/// **抓不住**：译文本身翻得对不对——金表是「拆分前那一份」的快照，只能证明没变，不能证明翻得好。
+///
+/// 金表怎么来的：拆分前在这里临时加过一条 `println!("GOLD\t{}\t{}\t{}", …)` 的用例，把
+/// `Key::ALL` ×（`Catalog::of(En)`, `Catalog::of(ZhCn)`）导出成 72 行 TSV，再原样抄成
+/// `catalog/golden.rs`；那条导出用例随后已删除（不在提交里）。
+#[test]
+fn split_keeps_every_translation() {
+    let en = Catalog::of(Lang::En);
+    let zh = Catalog::of(Lang::ZhCn);
+    let actual = Key::ALL
+        .iter()
+        .map(|key| (key.name(), en.text(*key), zh.text(*key)))
+        .collect::<Vec<_>>();
+
+    assert_eq!(
+        actual.len(),
+        super::golden::len(),
+        "key 条数与拆分前不一致（某条被搬丢，或多出来一条）"
+    );
+
+    for (index, expected) in super::golden::rows().enumerate() {
+        let got = actual[index];
+        assert_eq!(
+            got.0, expected.0,
+            "第 {index} 条的 key 变了：拆分的域顺序被打乱，或某条被搬到了别处"
+        );
+        assert_eq!(got.1, expected.1, "{} 的英文译文变了", expected.0);
+        assert_eq!(got.2, expected.2, "{} 的中文译文变了", expected.0);
+    }
+}
+
+/// 用户可见文案里**不许**出现内部决策编号（`(D13)` / `(M175)` 这类）。
+///
+/// 为什么要在目录这一层守：`(D13)` 对用户没有任何意义（他不知道 D13 是什么），而这类串一旦
+/// 混进来就再没人记得删。M197 出图时实测到下载目录的基准版本徽标写着 `基准版本（D13）`。
+///
+/// 变异证明：把 `SettingsJavaDownloadBaseline` 的译文改回 `Baseline (D13)` / `基准版本（D13）`
+/// ⇒ 本用例红（中英两侧都扫）。判据是 `(`/`（` + `D`/`M` + 数字，不误伤 `(404)` / `(5xx / 429)`
+/// 这类真对用户有意义的括号短语。
+#[test]
+fn no_user_visible_string_mentions_an_internal_decision_id() {
+    for (key, en, zh) in super::golden::rows().copied() {
+        for (side, text) in [("en", en), ("zh-CN", zh)] {
+            assert!(
+                !mentions_decision_id(text),
+                "{key} 的{side}译文里出现了内部决策编号：{text}"
+            );
+        }
+    }
+}
+
+/// 用户可见文案里**不许**出现 markdown 反引号。
+///
+/// 渲染层没有内联代码通道（M175 r3 复审已核实 `RichText|markdown|Span::|spans(` 全树只命中
+/// 进度条与注释），反引号会原样上屏。M175 修过三处、M197 又修了三处；M168 的
+/// `FontCjkStatusHint` 是最后一条（M197 复审 r1 指出的），这里一并钉住。
+///
+/// 变异证明：给任意一条译文加一对反引号 ⇒ 本用例红。
+#[test]
+fn no_user_visible_string_carries_markdown_backticks() {
+    for (key, en, zh) in super::golden::rows().copied() {
+        for (side, text) in [("en", en), ("zh-CN", zh)] {
+            assert!(
+                !text.contains('`'),
+                "{key} 的{side}译文里还有 markdown 反引号：{text}"
+            );
+        }
+    }
+}
+
+/// 串里有没有「(D13)」「（M175）」这类内部编号（全角半角括号都算）。
+fn mentions_decision_id(text: &str) -> bool {
+    let chars: Vec<char> = text.chars().collect();
+    chars.windows(3).any(|window| {
+        (window[0] == '(' || window[0] == '（')
+            && (window[1] == 'D' || window[1] == 'M')
+            && window[2].is_ascii_digit()
+    })
+}

crates/i18n/src/catalog/update.rs

@@ -0,0 +1,59 @@
+//! 自更新文案（M159）：设置页「更新」分组 + 顶部提示条。
+//!
+//! 域文件的形状见 [`crate::catalog`] 的「域装配」一节；本域**追加在链尾**（`account_entries`
+//! 之后），于是 `Key::ALL` 顺序 = 金表顺序 = 先 main 的全部域，最后 update（金表只追加不重排）。
+//!
+//! 三条口径：
+//!
+//! 1. **「检查失败」与「已是最新」是两句不同的文案**（mission 的硬要求）：前者带原因，
+//!    后者带版本号。别为了少一个 key 把它们合并成一条；
+//! 2. 体积走 `{size}`（由页面按 `human_bytes` 格式化后传入），版本号走 `{version}`——
+//!    目录里不写死任何版本号；
+//! 3. 品牌/技术名词不翻：`OpenGL` / `SHA256` / `GitHub` 这类保持原样。
+
+macro_rules! update_entries {
+    ($next:ident, $($rest:ident,)* { $($acc:tt)* }) => {
+        $next! { $($rest,)* {
+            $($acc)*
+            // ── 设置页「更新」分组
+            SettingsGroupUpdate => ("Updates", "更新"),
+            SettingsUpdateCurrent => ("Current version", "当前版本"),
+            SettingsUpdateChannel => ("Channel", "更新渠道"),
+            SettingsUpdateChannelStable => ("Stable", "稳定版"),
+            SettingsUpdateAutoCheck => ("Check for updates on startup", "启动时检查更新"),
+            SettingsUpdateCheckNow => ("Check now", "立即检查"),
+            SettingsUpdateChecking => ("Checking…", "正在检查…"),
+            SettingsUpdateNever => ("Not checked yet", "还没检查过"),
+            SettingsUpdateUpToDate => ("You are on the latest version ({version})", "已是最新（{version}）"),
+            SettingsUpdateAvailable => ("Version {version} is available ({size})", "有新版本 {version}（{size}）"),
+            SettingsUpdateMissingArtifact => (
+                "Version {version} is out, but there is no build for this platform yet.",
+                "{version} 已发布，但还没有本平台的安装包。"
+            ),
+            SettingsUpdateFailed => ("Check failed: {reason}", "检查失败：{reason}"),
+            SettingsUpdateApply => ("Download and install", "下载并安装"),
+            SettingsUpdateApplying => ("Downloading and verifying…", "正在下载并校验…"),
+            SettingsUpdateReady => ("Version {version} is ready — restart to use it.", "版本 {version} 已就位，重启后生效。"),
+            SettingsUpdateNotes => ("Release notes: {notes}", "更新说明：{notes}"),
+            SettingsUpdateForced => ("This update is required", "这是一次强制更新"),
+            SettingsUpdateLastChecked => ("Last check", "上次检查"),
+            SettingsUpdateHint => (
+                "Downloads are verified with SHA256 before they touch the launcher. The running copy stays as it is until you restart.",
+                "更新包在落到启动器之前会做 SHA256 校验；正在运行的这一份在你重启之前不会变。"
+            ),
+            // ── 顶部提示条
+            UpdateBannerTitleAvailable => ("Version {version} is available", "发现新版本 {version}"),
+            UpdateBannerBodyAvailable => ("Download size {size}", "下载体积 {size}"),
+            UpdateBannerTitleReady => ("Update ready", "更新已就位"),
+            UpdateBannerBodyReady => ("Version {version} will run after a restart.", "重启后运行版本 {version}。"),
+            UpdateBannerTitleFailed => ("Update failed", "更新失败"),
+            UpdateBannerApplying => ("Downloading the update…", "正在下载更新…"),
+            UpdateBannerInstall => ("Download and install", "下载并安装"),
+            UpdateBannerDismiss => ("Skip this version", "忽略这个版本"),
+            UpdateBannerRestartNow => ("Restart now", "立即重启"),
+            UpdateBannerRetry => ("Try again", "重试"),
+        } }
+    };
+}
+
+pub(crate) use update_entries;

crates/i18n/src/choice.rs

@@ -0,0 +1,258 @@
+//! 设置页的**界面语言档位**（M106 `I18NFOLLOW`）：跟随系统 / 手选某一门。
+//!
+//! ## 为什么单独一个文件
+//!
+//! `lang.rs` 讲的是「系统说哪种语言」（locale → [`Lang`] 的探测，M92），本文件讲的是「用户要哪种
+//! 语言」——两者的判据不一样：探测只能尽量理解别人给的字符串，档位是我们自己写进配置的，写错就该
+//! 暴露。放在一起会让 `lang.rs` 顶破 400 行（任务书那条硬线要求按功能拆文件）。
+//!
+//! ## D28 的判定顺序（整条挂在 [`LangChoice::resolve`] 上）
+//!
+//! **手选 > 系统语言 > 环境变量 > 英文**。最后一级「英文」不是偷懒：纯英文环境不扫、不下载中文
+//! 字体（零额外体积 / 零网络），这条由 [`crate::font::decide`] 兜住，真值表见下面
+//! `english_never_needs_a_chinese_font_and_chinese_always_resolves_one`。
+//!
+//! ## 「跟随系统」怎么表达
+//!
+//! **不写 `ui.language` 这个键**（[`LangChoice::setting_value`] 返回 `None`）。不写哨兵值是因为
+//! 两件事：① schema 的允许值只有 `zh_cn` / `en_us`（`core::setting::keys::LANGUAGES`），写别的
+//! 会被枚举校验拒掉；② 读的那一头（`SettingBridge::load_ui_language`）只认显式值，所以「键不存在」
+//! 与「用户选了跟随系统」本来就是同一件事。
+
+use crate::catalog::Key;
+use crate::lang::{resolve, Detection, Lang, LocaleSource, ORIGIN_SETTING};
+
+/// 设置页「界面语言」的三档选择。
+///
+/// 为什么不是 `Option<Lang>`：`None` 与「用户明确勾了跟随系统」在类型上分不开，而设置页要把那一档
+/// **画成选中**。
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum LangChoice {
+    /// 跟随系统（= 配置里没有 `ui.language`）。
+    System,
+    /// 用户手选的固定语言。
+    Fixed(Lang),
+}
+
+impl LangChoice {
+    /// 全部档位（顺序即设置页语言行的按钮顺序）。
+    pub const ALL: &'static [LangChoice] = &[
+        LangChoice::System,
+        LangChoice::Fixed(Lang::ZhCn),
+        LangChoice::Fixed(Lang::En),
+    ];
+
+    /// 配置里 `ui.language` 的原文 → 档位。
+    ///
+    /// `None`（键不存在）与**不认识的值**都算「跟随系统」——与 [`resolve`] 跳过坏值的行为同源：
+    /// 配置被 AI / CLI 写脏时退回系统语言，而不是猜成某一种。
+    #[must_use]
+    pub fn from_setting(value: Option<&str>) -> LangChoice {
+        value
+            .and_then(Lang::from_setting)
+            .map_or(LangChoice::System, LangChoice::Fixed)
+    }
+
+    /// 落盘用：跟随系统 = `None`（**删掉那个键**，不写哨兵值——哨兵会让「跟随系统」永远失效）。
+    #[must_use]
+    pub const fn setting_value(self) -> Option<&'static str> {
+        match self {
+            LangChoice::System => None,
+            LangChoice::Fixed(lang) => Some(lang.setting_value()),
+        }
+    }
+
+    /// 这一档在设置页上的名字（key 在 `catalog/general.rs` 域）。
+    #[must_use]
+    pub const fn label_key(self) -> Key {
+        match self {
+            LangChoice::System => Key::SettingsLanguageFollowSystem,
+            LangChoice::Fixed(Lang::ZhCn) => Key::SettingsLanguageZhCn,
+            LangChoice::Fixed(Lang::En) => Key::SettingsLanguageEn,
+        }
+    }
+
+    /// 这一档最终生效的语言 + 来源（日志与设置页回显都用它）。
+    ///
+    /// 跟随系统 → 走 [`resolve`] 的三级链；手选 → 直接赢，`origin = setting`
+    /// （`raw` 写配置值，日志里能看出「这是用户手选的」）。
+    #[must_use]
+    pub fn resolve(self, platform: &dyn LocaleSource, env: &dyn LocaleSource) -> Detection {
+        match self {
+            LangChoice::System => resolve(None, platform, env),
+            LangChoice::Fixed(lang) => Detection {
+                lang,
+                raw: Some(lang.setting_value().to_owned()),
+                origin: ORIGIN_SETTING,
+            },
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::lang::ORIGIN_DEFAULT;
+
+    #[test]
+    fn choice_round_trips_through_the_config_value() {
+        // 抓得住：①「跟随系统」被写成哨兵值——那会让 `Lang::from_setting` 认不出、下次启动退回
+        //        系统语言，「手选」这件事静默丢失；②档位顺序被调换（设置页按钮顺序）。
+        // 抓不住：配置文件里到底有没有这个键（那是 `SettingsBridge` 的读写，见 presenter 侧测试）。
+        assert_eq!(LangChoice::from_setting(None), LangChoice::System);
+        assert_eq!(
+            LangChoice::from_setting(Some("zh_cn")),
+            LangChoice::Fixed(Lang::ZhCn)
+        );
+        assert_eq!(
+            LangChoice::from_setting(Some("en_us")),
+            LangChoice::Fixed(Lang::En)
+        );
+        for bogus in ["zh-CN", "system", "", "fr_fr"] {
+            assert_eq!(
+                LangChoice::from_setting(Some(bogus)),
+                LangChoice::System,
+                "{bogus}"
+            );
+        }
+
+        assert_eq!(LangChoice::System.setting_value(), None, "跟随系统不写键");
+        for choice in LangChoice::ALL {
+            assert_eq!(
+                LangChoice::from_setting(choice.setting_value()),
+                *choice,
+                "{} 落盘后读不回来",
+                choice.setting_value().unwrap_or("<跟随系统>")
+            );
+        }
+        assert_eq!(
+            LangChoice::ALL,
+            &[
+                LangChoice::System,
+                LangChoice::Fixed(Lang::ZhCn),
+                LangChoice::Fixed(Lang::En)
+            ][..]
+        );
+    }
+
+    #[test]
+    fn choice_resolution_truth_table() {
+        // D28 的四级优先级，**逐档逐源**列出来：手选 > 系统 > 环境变量 > 英文。
+        // 抓得住：优先级顺序被改（例如手选的英文被中文系统盖掉）、或「跟随系统」直接落英文。
+        // 抓不住：这些源在真机上读到什么（`SystemLocale` 的真机行为在 `app-iced` 侧）。
+        struct Named(&'static str, Option<&'static str>);
+
+        impl LocaleSource for Named {
+            fn locale(&self) -> Option<String> {
+                self.1.map(str::to_owned)
+            }
+            fn label(&self) -> &'static str {
+                self.0
+            }
+        }
+
+        let registry_zh = Named("registry", Some("zh-CN"));
+        let registry_en = Named("registry", Some("en-US"));
+        let nothing = Named("registry", None);
+        let env_zh = Named("env", Some("zh_CN.UTF-8"));
+        let env_en = Named("env", Some("en_US.UTF-8"));
+        let env_none = Named("env", None);
+
+        let follow = LangChoice::System;
+        let en_choice = LangChoice::Fixed(Lang::En);
+        let zh = LangChoice::Fixed(Lang::ZhCn);
+
+        // (档位, 平台源, 环境变量源) -> (生效语言, 来源)
+        let table: &[(LangChoice, &dyn LocaleSource, &dyn LocaleSource, Lang, &str)] = &[
+            // ① 手选压过一切（系统是中文、环境是中文，手选英文就画英文）
+            (en_choice, &registry_zh, &env_zh, Lang::En, ORIGIN_SETTING),
+            (zh, &registry_en, &env_en, Lang::ZhCn, ORIGIN_SETTING),
+            // ② 跟随系统 → 系统源
+            (follow, &registry_zh, &env_en, Lang::ZhCn, "registry"),
+            (follow, &registry_en, &env_zh, Lang::En, "registry"),
+            // ③ 系统源取不到 → 环境变量
+            (follow, &nothing, &env_zh, Lang::ZhCn, "env"),
+            (follow, &nothing, &env_en, Lang::En, "env"),
+            // ④ 都没有 → 英文 + default（D28：纯英文环境不用管）
+            (follow, &nothing, &env_none, Lang::En, ORIGIN_DEFAULT),
+        ];
+
+        for (choice, platform, env, lang, origin) in table {
+            let detection = choice.resolve(*platform, *env);
+            assert_eq!(
+                (detection.lang, detection.origin),
+                (*lang, *origin),
+                "{choice:?} platform={:?} env={:?}",
+                platform.locale(),
+                env.locale()
+            );
+        }
+
+        // 手选档的 `raw` 是配置值（日志一眼看出「用户手选的」），跟随系统档的 `raw` 是系统原文。
+        assert_eq!(
+            zh.resolve(&registry_en, &env_en).describe(),
+            "lang=zh-CN locale=zh_cn source=setting"
+        );
+        assert_eq!(
+            follow.resolve(&registry_zh, &env_en).describe(),
+            "lang=zh-CN locale=zh-CN source=registry"
+        );
+    }
+
+    #[test]
+    fn english_never_needs_a_chinese_font_and_chinese_always_resolves_one() {
+        // D28 字体那一级的真值表（`font::decide` 是纯函数，这里把语言 × 系统字体库全组合扫一遍）：
+        // 抓得住：①英文环境被接上中文字体/下载（「零额外体积/零网络」的直接违约）；②中文环境扫不到
+        //        字体却不给下载信号（会白块）；③扫到了却不用系统字体（会白下 20 MB）。
+        // 抓不住：本机到底装没装这些族（`app-iced` 的 `fonts/cjk.rs` 把真字体库喂进来）。
+        use crate::font::{self, Strategy, CJK_FAMILIES, NOTO_SANS_SC};
+
+        let has_font =
+            |families: &'static [&'static str]| move |family: &str| families.contains(&family);
+
+        for installed in [
+            has_font(&[]),
+            has_font(&["Segoe UI"]),
+            has_font(CJK_FAMILIES),
+        ] {
+            assert_eq!(
+                font::decide(Lang::En, &installed),
+                Strategy::NotNeeded,
+                "英文环境不许要中文字体"
+            );
+        }
+
+        assert_eq!(
+            font::decide(Lang::ZhCn, &has_font(&["Segoe UI"])),
+            Strategy::NeedsDownload(&NOTO_SANS_SC)
+        );
+        let first = CJK_FAMILIES[0];
+        let installed = has_font(&["Segoe UI", "Microsoft YaHei UI"]);
+        assert_eq!(first, "Microsoft YaHei UI");
+        assert_eq!(
+            font::decide(Lang::ZhCn, &installed),
+            Strategy::System { family: first }
+        );
+    }
+
+    #[test]
+    fn every_choice_has_a_label_in_both_catalogs() {
+        // 抓得住：设置页语言行接了一个 catalog 里不存在的 key（画出来是 `⟪missing:…⟫`）。
+        // 抓不住：译文翻得对不对（金表 + `chinese_catalog_is_actually_chinese` 管那一层）。
+        let mut keys = Vec::new();
+        for choice in LangChoice::ALL {
+            let key = choice.label_key();
+            for lang in Lang::ALL {
+                assert!(
+                    lang.catalog().get(key).is_some(),
+                    "{key:?} 在 {} 目录里缺词",
+                    lang.tag()
+                );
+            }
+            keys.push(key);
+        }
+        keys.sort_unstable();
+        keys.dedup();
+        assert_eq!(keys.len(), LangChoice::ALL.len(), "两档用了同一个 key");
+    }
+}

crates/i18n/src/font.rs

@@ -0,0 +1,278 @@
+//! 中文字体策略（D28 后半）：**只做判据与「该下载什么」，不联网**。
+//!
+//! ## 三句话
+//!
+//! 1. **英文环境不要字体**：`Lang::En` → [`Strategy::NotNeeded`]，与系统里装了什么无关。
+//!    D28 原话是「纯英文环境不用管（零额外体积/零网络）」，这条是本模块最重要的断言。
+//! 2. **中文环境先扫系统**：候选族名单见 [`CJK_FAMILIES`]，命中即用（[`Strategy::System`]）。
+//! 3. **扫不到才说要下载**：[`Strategy::NeedsDownload`] 是一个**信号**，不是动作——
+//!    真正下载由注入的 [`Fetcher`] 实现（M168 起的真实现是
+//!    `crates/app-iced/src/fonts/cdn.rs`，底层走 `unlucky_core::download::font`）。本 crate 保持
+//!    **零依赖**：它只携带「下什么」（[`Source::Pinned`]：URL 候选 + sha256 + 字节数），不碰网络。
+//!
+//! ## 谁在什么时刻问这里
+//!
+//! | 调用点 | 时机 | 后果 |
+//! |---|---|---|
+//! | `crates/app-iced/src/fonts.rs::resolve` | 启动（按系统 locale） | 打一行 `cjk=…` 日志 |
+//! | `crates/app-iced/src/fonts.rs::cjk_for` | 设置页切语言 | 复算 + 需要时**触发下载** |
+//!
+//! 两条路都**只**在 [`Strategy::NeedsDownload`] 时才碰 [`Fetcher`]（[`ensure`] 的判据），
+//! 英文环境与「系统已有字体」两条路一次网络调用都没有（守卫见本文件的单测与
+//! `crates/app-iced/src/fonts/install/tests.rs`）。
+//!
+//! ## 诚实边界（抓得住什么 / 抓不住什么）
+//!
+//! - **抓得住**：语言 → 是否需要中文 → 系统里有没有候选族 → 要不要下载 这条链路的判定；
+//! - **抓不住**：①**族名存在 ≠ 字形覆盖**——`fontdb` 里挂着一个叫 `SimSun` 的族也可能是个残缺子集，
+//!   真判据要用 `ttf-parser` 查 cmap（M60 Q3 的 spike 做过，本 crate 不引依赖）；
+//!   ②下载下来的字节能不能在**这台机器**的渲染器上正常出字（注册与回退在 app-iced；macOS/Linux
+//!   没有真机验证，见 M168 报告）。
+
+use crate::lang::Lang;
+
+/// 已知的系统 CJK 族（Windows / macOS / Linux，按「观感优先」排序，命中第一个就用）。
+///
+/// 只收**简体**优先的常见族；`Microsoft JhengHei` 这类繁体族留在名单里垫底——
+/// 仓内只有一套中文目录（简体），繁体用户看简体的观感仍好过看英文。
+pub const CJK_FAMILIES: &[&str] = &[
+    // Windows 10/11
+    "Microsoft YaHei UI",
+    "Microsoft YaHei",
+    "DengXian",
+    "SimHei",
+    "SimSun",
+    "Microsoft JhengHei",
+    // macOS
+    "PingFang SC",
+    "Hiragino Sans GB",
+    "Heiti SC",
+    "Songti SC",
+    // Linux
+    "Noto Sans CJK SC",
+    "Noto Sans SC",
+    "Source Han Sans SC",
+    "Source Han Sans CN",
+    "Sarasa Gothic SC",
+    "WenQuanYi Micro Hei",
+    "Droid Sans Fallback",
+];
+
+/// 中文字体必须覆盖的字重（M-决定日志 ③：Android 16 的可变思源黑体缺 100–400，
+/// 而 M3 Expressive 的 emphasized 档要 700 ⇒ 「400 / 500 / 700 至少三档」）。
+pub const REQUIRED_WEIGHTS: &[u16] = &[400, 500, 700];
+
+/// 可下载字体的来源：**已钉死**的 URL 候选 + `sha256` + 字节数。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Source {
+    /// 钉死的一套下载参数（M168）。
+    ///
+    /// 为什么是「常量 + 多重校验」而不是「让下载器自己挑」：CDN 上的字节会变（上游改字体、
+    /// 镜像换了实现），而**字体是注册进渲染器的可执行内容**。所以 URL 钉到 **git commit**
+    /// （不是 `@main`）、字节数与 `sha256` 一起钉，任何一项对不上就拒绝落盘（见
+    /// `unlucky_core::download::font`）。
+    ///
+    /// `urls` 是**候选**：首选挂了才试下一个。两个候选**必须是不同的失败域**（Cloudflare 侧 +
+    /// Fastly 侧，见 [`NOTO_SANS_SC`] 的实测表）；同一家 CDN 的两个域名不算冗余。
+    ///
+    /// 每次尝试与整条取回都有整体时限（`unlucky_core::download::font` 的 `ATTEMPT_DEADLINE` /
+    /// `TOTAL_DEADLINE`）：慢而不死的连接（IPv6 爬行实测 67 KB/s）会在时限处被打断、转下一个
+    /// 候选，而不是让用户在设置页干等四分钟。超时归「网络」档，界面文案是「网络不通或太慢」。
+    Pinned {
+        /// URL 候选（按顺序尝试）。
+        urls: &'static [&'static str],
+        /// 期望 `sha256`（小写十六进制，64 位）。
+        sha256: &'static str,
+        /// 期望字节数（进度预算 + 大小上限判据）。
+        bytes: u64,
+    },
+}
+
+/// 一套可下载的 CJK 字体描述（不含 URL / 哈希，原因见 [`Source`]）。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct CjkFont {
+    /// 族名（下载并注册后，`Font` 用它取字）。
+    pub family: &'static str,
+    /// 许可证（必须是 OFL / Apache 这类可再分发的；D28 明令不得内置 Segoe）。
+    pub license: &'static str,
+    /// 这套字体可用的字重。
+    pub weights: &'static [u16],
+    /// 下载源（URL 候选 + sha256 + 字节数，见 [`Source::Pinned`]）。
+    pub source: Source,
+}
+
+/// 缺字体时的默认方案：Noto Sans SC（OFL-1.1）**可变字体**（wght 100–900，整个简体字符集）。
+///
+/// 钉死的东西（M168 实测抓的，不是猜的）：
+///
+/// | 项 | 值 |
+/// |---|---|
+/// | 上游 | `google/fonts` 仓库的 `ofl/notosanssc/NotoSansSC[wght].ttf` |
+/// | 版本 | commit `2894aab31764f10f29c421bdfd2340d3b382d384`（该文件的最后一次改动，2022-12-09） |
+/// | 字节数 | 17 772 300（16.95 MiB） |
+/// | sha256 | `a3041811a78c361b1de50f953c805e0244951c21c5bd412f7232ef0d899af0da` |
+///
+/// 为什么钉 commit 而不是 `@main`：`@main` 会随上游改动漂移，哈希一漂就成了「每次中文环境都下
+/// 一份、然后校验失败、然后降级」——比不下更糟。commit 是不变内容，哈希因此是可复现的判据。
+///
+/// 为什么是**一个**可变字体而不是三个静态子集（400/500/700 各一份）：三份静态子集合计 ≈25 MiB，
+/// 而可变字体一份 16.9 MiB 就覆盖 100–900（cosmic-text 0.15 会把请求的字重写进 `wght` 轴，见
+/// `crates/core/src/download/font.rs` 模块文档与 M168 报告里的「抓不住」一段）。
+pub const NOTO_SANS_SC: CjkFont = CjkFont {
+    family: "Noto Sans SC",
+    license: "OFL-1.1",
+    weights: &[100, 200, 300, 400, 500, 600, 700, 800, 900],
+    source: Source::Pinned {
+        // 两个候选**必须是不同的失败域**（M168 复审 P2-1）：`cdn.jsdelivr.net` 与
+        // `fastly.jsdelivr.net` 都 CNAME 到 `jsdelivr.map.fastly.net`（同一批 Fastly 边缘），
+        // 「一个坏了换另一个」等于没有冗余——上一版就是这样，被复审当场打掉。
+        //
+        // 实测（两份独立的国内网络取证，同一份 17 772 300 B 内容，sha256 都是 a3041811…）：
+        //
+        // | 域名 | 解析 | 本机（本 worktree 开发机） | 复审机（无代理） |
+        // |---|---|---|---|
+        // | gcore.jsdelivr.net | Cloudflare 104.16.x | 13.3 s 完整 | 16.6 s 完整 |
+        // | testingcf.jsdelivr.net | Cloudflare 104.16.x | 11.8 s 完整 | 14.8 s 完整 |
+        // | cdn.jsdelivr.net | Fastly 151.101.x | 11.9 s 完整（另两次 5.7 s / 14.9 s）| 1.1 s，但**走 IPv6 时 3 次都掉到 ≈67 KB/s**（60 s 只到 4.0 MB）|
+        // | fastly.jsdelivr.net | 同上（Fastly）| — | 20 s 只到 2.5 MB（比它「要备的那条」还慢）|
+        //
+        // 排序依据（不是「听说更稳」）：**首选放 Cloudflare 那一侧**——Fastly 侧的 IPv6 边缘
+        // 在复审环境里会掉进 60~77 KB/s 的慢路径（那条路上 17.7 MB 要 ≈4 分钟），而 Cloudflare
+        // 侧两份取证都完整下完、且是独立的失败域。二选留 Fastly 侧：本机它反而最快（5.7~11.9 s），
+        // 保留它是为了「Cloudflare 一侧整体不可用时还有另一家 CDN」。
+        // 先后只影响速度，不影响正确性：sha256 只认一份，镜像给了别的内容会被当场拒。
+        urls: &[
+            "https://gcore.jsdelivr.net/gh/google/fonts@2894aab31764f10f29c421bdfd2340d3b382d384/ofl/notosanssc/NotoSansSC%5Bwght%5D.ttf",
+            "https://cdn.jsdelivr.net/gh/google/fonts@2894aab31764f10f29c421bdfd2340d3b382d384/ofl/notosanssc/NotoSansSC%5Bwght%5D.ttf",
+        ],
+        sha256: "a3041811a78c361b1de50f953c805e0244951c21c5bd412f7232ef0d899af0da",
+        bytes: 17_772_300,
+    },
+};
+
+/// 字体策略结论。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Strategy {
+    /// 不需要中文字体（英文环境）。
+    NotNeeded,
+    /// 系统里已有可用族，直接用。
+    System {
+        /// 命中的族名。
+        family: &'static str,
+    },
+    /// 需要下载（本模块只发信号，不联网）。
+    NeedsDownload(&'static CjkFont),
+    /// 探测不出（拿不到系统字体库）——**不等于**「需下载」：不许凭猜测去下载。
+    Unprobeable,
+}
+
+impl Strategy {
+    /// 一行日志片段（`cjk=system:"Microsoft YaHei"` / `cjk=needs-download(Noto Sans SC)` …）。
+    #[must_use]
+    pub fn describe(&self) -> String {
+        match self {
+            Strategy::NotNeeded => "cjk=not-needed".to_owned(),
+            Strategy::System { family } => format!("cjk=system:\"{family}\""),
+            Strategy::NeedsDownload(font) => format!("cjk=needs-download({})", font.family),
+            Strategy::Unprobeable => "cjk=unprobeable".to_owned(),
+        }
+    }
+}
+
+/// 判据（纯函数）：语言 + 「某族装没装」→ 策略。
+///
+/// `installed` 由调用方提供（iced 版查系统字体库，单测给假闭包）。
+#[must_use]
+pub fn decide(lang: Lang, installed: &dyn Fn(&str) -> bool) -> Strategy {
+    if lang != Lang::ZhCn {
+        // D28：纯英文环境不加载任何中文字体，也不下载。
+        return Strategy::NotNeeded;
+    }
+
+    CJK_FAMILIES
+        .iter()
+        .copied()
+        .find(|family| installed(family))
+        .map_or(Strategy::NeedsDownload(&NOTO_SANS_SC), |family| {
+            Strategy::System { family }
+        })
+}
+
+/// 字体下载器接口（**注入式**：i18n 不碰网络，真实现由 app 层提供）。
+pub trait Fetcher {
+    /// 取一套字体（返回原始字节，装进字体系统是调用方的事）。
+    ///
+    /// 契约：**同一个进程里第二次调用应当零网络**（缓存命中），且返回的字节已通过校验
+    /// （实现方的责任，见 `unlucky_core::download::font`）。
+    ///
+    /// # Errors
+    /// 网络失败 / 校验失败 / 磁盘失败三类人话错误。
+    fn fetch(&self, font: &'static CjkFont) -> Result<Vec<u8>, FetchError>;
+}
+
+/// 下载失败的分类（给 UI 决定要不要重试；分类少是故意的）。
+///
+/// 三类对应三句不同的话：网络类「过会儿再试」、校验类「这个源给的东西不对」、磁盘类
+/// 「腾点空间」。UI 文案按 [`FetchError::class`] 选词，**不要**按错误串猜。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum FetchError {
+    /// 网络层失败（超时 / 连不上 / 非 2xx）。
+    Network(String),
+    /// 校验失败（哈希 / 长度不符，或不是字体文件）。
+    Integrity(String),
+    /// 本地磁盘失败（建目录 / 写文件 / 换名）。
+    Disk(String),
+}
+
+impl FetchError {
+    /// 稳定类别名（`network` / `integrity` / `disk`；日志与 i18n 金表按它选词）。
+    #[must_use]
+    pub const fn class(&self) -> &'static str {
+        match self {
+            Self::Network(_) => "network",
+            Self::Integrity(_) => "integrity",
+            Self::Disk(_) => "disk",
+        }
+    }
+
+    /// 人类可读描述。
+    #[must_use]
+    pub fn message(&self) -> &str {
+        match self {
+            Self::Network(message) | Self::Integrity(message) | Self::Disk(message) => message,
+        }
+    }
+}
+
+/// [`ensure`] 的结局。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Fetched {
+    /// 本来就不需要（英文环境）。
+    NothingToDo,
+    /// 系统已有，直接用。
+    AlreadySystem {
+        /// 命中的族名。
+        family: &'static str,
+    },
+    /// 下载成功，拿到字节（交给调用方注册）。
+    Downloaded(Vec<u8>),
+    /// 探测不出，什么都没做。
+    Unknown,
+}
+
+/// 按策略执行：需要下载时才碰 [`Fetcher`]。
+///
+/// # Errors
+/// 下载器返回的错误原样透出（不吞、不改写分类）。
+pub fn ensure(strategy: Strategy, fetcher: &dyn Fetcher) -> Result<Fetched, FetchError> {
+    match strategy {
+        Strategy::NotNeeded => Ok(Fetched::NothingToDo),
+        Strategy::System { family } => Ok(Fetched::AlreadySystem { family }),
+        Strategy::Unprobeable => Ok(Fetched::Unknown),
+        Strategy::NeedsDownload(font) => fetcher.fetch(font).map(Fetched::Downloaded),
+    }
+}
+
+#[cfg(test)]
+#[path = "font/tests.rs"]
+mod tests;

crates/i18n/src/font/tests.rs

@@ -0,0 +1,177 @@
+//! `i18n::font` 的单测（拆出来只为守 400 行硬线）。
+
+use std::cell::Cell;
+
+use super::*;
+
+fn only(installed: &'static [&'static str]) -> impl Fn(&str) -> bool {
+    move |family| installed.contains(&family)
+}
+
+/// 假下载器：记录调用次数，避免「悄悄联网」这种事在单测里被放过。
+struct FakeFetcher {
+    calls: Cell<usize>,
+    result: Result<Vec<u8>, FetchError>,
+    seen: Cell<Option<&'static str>>,
+}
+
+impl FakeFetcher {
+    fn new(result: Result<Vec<u8>, FetchError>) -> Self {
+        FakeFetcher {
+            calls: Cell::new(0),
+            result,
+            seen: Cell::new(None),
+        }
+    }
+}
+
+impl Fetcher for FakeFetcher {
+    fn fetch(&self, font: &'static CjkFont) -> Result<Vec<u8>, FetchError> {
+        self.calls.set(self.calls.get() + 1);
+        self.seen.set(Some(font.family));
+        self.result.clone()
+    }
+}
+
+#[test]
+fn english_never_wants_a_cjk_font() {
+    // 抓得住：D28 的核心承诺——英文环境不加载/不下载中文字体（D28 说「零额外体积/零网络」）。
+    // 抓不住：程序真的没去读那个字体文件（那是加载器的行为，本 crate 只管判据）。
+    assert_eq!(decide(Lang::En, &only(&[])), Strategy::NotNeeded);
+    assert_eq!(
+        decide(Lang::En, &only(&["Microsoft YaHei"])),
+        Strategy::NotNeeded,
+        "装了中文字体也不该进入中文分支"
+    );
+}
+
+#[test]
+fn chinese_prefers_the_first_installed_candidate() {
+    // 抓得住：候选顺序（YaHei UI > YaHei > SimSun…）被调换，或命中判断写成了「装了任意字面就 ok」。
+    // 抓不住：命中的族是否真有简体字形覆盖（族名存在 ≠ cmap 覆盖，见模块文档）。
+    assert_eq!(
+        decide(
+            Lang::ZhCn,
+            &only(&["Segoe UI", "Microsoft YaHei", "SimSun"])
+        ),
+        Strategy::System {
+            family: "Microsoft YaHei"
+        }
+    );
+    assert_eq!(
+        decide(Lang::ZhCn, &only(&["PingFang SC"])),
+        Strategy::System {
+            family: "PingFang SC"
+        }
+    );
+    assert_eq!(
+        decide(Lang::ZhCn, &only(&["Noto Sans CJK SC", "Noto Sans SC"])),
+        Strategy::System {
+            family: "Noto Sans CJK SC"
+        }
+    );
+}
+
+#[test]
+fn chinese_without_cjk_fonts_emits_the_download_signal() {
+    // 抓得住：中文环境 + 系统无 CJK 时**给信号**（而不是静默回英文、也不是自己联网）。
+    // 抓不住：信号之后 UI 有没有把提示画出来（页面侧 / 截图验收）。
+    let strategy = decide(Lang::ZhCn, &only(&["Segoe UI", "Roboto", "Cascadia Mono"]));
+    let Strategy::NeedsDownload(font) = strategy else {
+        panic!("应当要求下载：{strategy:?}");
+    };
+    assert_eq!(font.family, "Noto Sans SC");
+    assert_eq!(font.license, "OFL-1.1");
+    assert_eq!(strategy.describe(), "cjk=needs-download(Noto Sans SC)");
+}
+
+/// pin 的形态守卫（M168）：URL 走 https、哈希是 64 位小写十六进制、字节数在大小上限内。
+///
+/// 抓得住：①有人把 URL 改成 `@main` 这类会漂移的引用（不是不行，但那样哈希必须跟着变，
+/// 这条断言至少逼他看见自己在动什么）；②手抄哈希抄错一位（下一个人只会在真机上看到
+/// 「校验失败」然后降级）；③把三个静态子集塞进来却没改字节数。
+/// 抓不住：CDN 上今天还发不发得出这份字节（要真联网，报告里写明未验）。
+#[test]
+fn the_pinned_source_is_well_formed() {
+    let Source::Pinned {
+        urls,
+        sha256,
+        bytes,
+    } = NOTO_SANS_SC.source;
+    assert!(!urls.is_empty(), "至少要有一个 URL");
+    for url in urls {
+        assert!(url.starts_with("https://"), "字体必须走 https：{url}");
+        assert!(
+            !url.contains("@main"),
+            "钉 commit 而不是会漂移的分支：{url}"
+        );
+    }
+    assert_eq!(sha256.len(), 64, "{sha256}");
+    assert!(
+        sha256.bytes().all(|byte| byte.is_ascii_hexdigit()),
+        "{sha256}"
+    );
+    assert_eq!(sha256, sha256.to_ascii_lowercase(), "哈希用小写：{sha256}");
+    assert!(bytes > 0 && bytes < 32 * 1024 * 1024, "{bytes}");
+}
+
+#[test]
+fn download_fonts_cover_the_required_weights() {
+    // 抓得住：将来换了字体却没覆盖 400/500/700（M3 Expressive 的 emphasized 档要 700）。
+    // 抓不住：字重是可变轴还是静态子集（那要看下载 mission 选的文件，本 crate 只有元数据）。
+    for weight in REQUIRED_WEIGHTS {
+        assert!(
+            NOTO_SANS_SC.weights.contains(weight),
+            "缺 {weight} 档：{:?}",
+            NOTO_SANS_SC.weights
+        );
+    }
+}
+
+#[test]
+fn ensure_only_touches_the_fetcher_when_download_is_needed() {
+    // 抓得住：英文环境/系统已有字体时**仍然调了下载器**（= 偷跑网络请求）；
+    // 也抓得住下载失败被吞掉（错误必须原样透出）。
+    // 抓不住：真实现的网络行为（本 crate 没有网络实现，这正是不联网的证据）。
+    let idle = FakeFetcher::new(Ok(vec![1, 2, 3]));
+    assert_eq!(ensure(Strategy::NotNeeded, &idle), Ok(Fetched::NothingToDo));
+    assert_eq!(
+        ensure(Strategy::System { family: "SimSun" }, &idle),
+        Ok(Fetched::AlreadySystem { family: "SimSun" })
+    );
+    assert_eq!(ensure(Strategy::Unprobeable, &idle), Ok(Fetched::Unknown));
+    assert_eq!(idle.calls.get(), 0, "这三种情况都不许联网");
+
+    let ok = FakeFetcher::new(Ok(vec![9; 4]));
+    assert_eq!(
+        ensure(Strategy::NeedsDownload(&NOTO_SANS_SC), &ok),
+        Ok(Fetched::Downloaded(vec![9; 4]))
+    );
+    assert_eq!(ok.calls.get(), 1);
+    assert_eq!(ok.seen.get(), Some("Noto Sans SC"));
+
+    let broken = FakeFetcher::new(Err(FetchError::Network("超时".to_owned())));
+    assert_eq!(
+        ensure(Strategy::NeedsDownload(&NOTO_SANS_SC), &broken),
+        Err(FetchError::Network("超时".to_owned()))
+    );
+}
+
+#[test]
+fn strategy_describe_is_one_line_for_every_case() {
+    // 抓得住：日志片段里混进换行（启动日志是按行解析的）。
+    // 抓不住：这些片段是否真的被打印（app-iced 的启动路径在那边测）。
+    let cases = [
+        Strategy::NotNeeded,
+        Strategy::System { family: "SimSun" },
+        Strategy::NeedsDownload(&NOTO_SANS_SC),
+        Strategy::Unprobeable,
+    ];
+    for case in cases {
+        let line = case.describe();
+        assert_eq!(line.lines().count(), 1, "{line}");
+        assert!(line.starts_with("cjk="), "{line}");
+    }
+    assert_eq!(Strategy::NotNeeded.describe(), "cjk=not-needed");
+    assert_eq!(Strategy::Unprobeable.describe(), "cjk=unprobeable");
+}

crates/i18n/src/lang.rs

@@ -0,0 +1,387 @@
+//! 语言与系统 locale 探测（D28 前半）。
+//!
+//! ## 判据只有两条
+//!
+//! 1. **中文环境**（`zh*` 任意变体）→ [`Lang::ZhCn`]；
+//! 2. **其它一切**（`en*`、`ja*`、`fr*`、`C`、`POSIX`、变量缺失、解析不了）→ [`Lang::En`]。
+//!
+//! 「其它一切 → 英文」不是偷懒：D28 的原话是「纯英文环境不用管」，而把 ja/fr/de 猜成中文才是真错
+//! （会连带触发中文字体下载）。宁可给一个英文界面，也不给一个语种错误的中文界面。
+//!
+//! ## 为什么 locale 源要能注入
+//!
+//! [`detect`] 的形状是 `detect(&dyn LocaleSource)`，[`EnvLocale`] 只是其中一个实现。这样
+//! **单测不依赖跑测试那台机器的 locale**（真值表测试在 [`lang`] 自己的 `tests` 里跑固定输入），
+//! 后续 mission 加「Win32 `GetUserDefaultLocaleName`」或「读配置里的 `ui.language`」也只是再实现一遍
+//! 这个 trait。
+//!
+//! ## 优先级（[`resolve`]）
+//!
+//! **`ui.language` 显式值 > 平台源 > POSIX 环境变量 > 英文**。本 crate 只有 [`EnvLocale`]
+//! 一个具体实现——平台真值源（Windows 注册表那一路）在 UI 壳层，因为读注册表要开子进程，
+//! 而本 crate 的纪律是不碰外部世界。
+//!
+//! ## 诚实边界（抓得住什么 / 抓不住什么）
+//!
+//! - **抓得住**：环境变量字符串 → 语言的映射（含 `zh_CN.UTF-8` / `zh-Hans-CN` / 大小写 / 修饰符）；
+//!   变量优先级（`LC_ALL` > `LC_MESSAGES` > `LANG`）；[`resolve`] 的四级优先级；
+//! - **抓不住**：**Windows 上这三个变量通常都不存在**——那条路的真值源是
+//!   `crates/app-iced/src/platform/locale.rs`（`reg.exe` 读注册表，零 FFI），
+//!   它不在本 crate 里（本 crate 零依赖、不 spawn 进程）。所以「Windows 上拿不到语言」
+//!   这件事只在**没有接线平台源**时成立，接线后由 `resolve` 的二级兜住。
+//!   配置里的 `ui.language` 读取属于设置层接线（本 crate 只提供 [`Lang::from_setting`] 与
+//!   [`resolve`] 的形状）。
+
+use std::env;
+
+use crate::catalog::Catalog;
+
+/// 界面语言。目前只有中英两套（D28 的「至少 zh-CN / en-US」）。
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub enum Lang {
+    /// 英文（默认；未知 locale 也落在这里）。
+    En,
+    /// 简体中文。
+    ZhCn,
+}
+
+impl Lang {
+    /// 全部语言（顺序即设置页下拉框的顺序）。
+    pub const ALL: &'static [Lang] = &[Lang::En, Lang::ZhCn];
+
+    /// BCP-47 标签（日志 / 字体请求里用；`zh-CN` 是本 crate 唯一的中文标识）。
+    #[must_use]
+    pub const fn tag(self) -> &'static str {
+        match self {
+            Lang::En => "en",
+            Lang::ZhCn => "zh-CN",
+        }
+    }
+
+    /// 配置值（`core::setting::keys::LANGUAGES` 的同一份词表）。
+    #[must_use]
+    pub const fn setting_value(self) -> &'static str {
+        match self {
+            Lang::En => "en_us",
+            Lang::ZhCn => "zh_cn",
+        }
+    }
+
+    /// 解析**配置值**（严格）：只认 [`Lang::setting_value`] 那两个字符串。
+    ///
+    /// 与宽松的 [`Lang::from_locale`] 分工明确：配置是我们自己写进去的，写错就该暴露（`None` 让设置层
+    /// 报错），而不是悄悄换成别的语言；系统 locale 是别人给的，只能尽量理解。
+    #[must_use]
+    pub fn from_setting(value: &str) -> Option<Lang> {
+        Lang::ALL
+            .iter()
+            .copied()
+            .find(|lang| lang.setting_value() == value)
+    }
+
+    /// 解析 **locale / 语言标签**（宽松）：`zh`、`zh_CN.UTF-8`、`zh-Hans-CN`、`ZH_cn` 都是中文。
+    ///
+    /// 只看**主语言子标签**：`zh-TW` / `zh-Hant` 也归 [`Lang::ZhCn`]——仓内只有一套中文目录，
+    /// 繁体用户看简体比看英文更有用；真要繁体得加第三套目录（见 `bridge` 的上游约定）。
+    #[must_use]
+    pub fn from_locale(tag: &str) -> Lang {
+        let trimmed = tag.trim();
+        // `zh_CN.UTF-8@euro`：codeset 与修饰符与语种无关，先切掉。
+        let without_codeset = trimmed.split('.').next().unwrap_or("");
+        let without_modifier = without_codeset.split('@').next().unwrap_or("");
+        let primary = without_modifier
+            .split(['-', '_'])
+            .next()
+            .unwrap_or("")
+            .to_ascii_lowercase();
+
+        if primary == "zh" {
+            Lang::ZhCn
+        } else {
+            Lang::En
+        }
+    }
+
+    /// 本语言的消息目录。
+    #[must_use]
+    pub const fn catalog(self) -> Catalog {
+        Catalog::of(self)
+    }
+}
+
+/// 没有任何 locale 信息时的落点（D28：纯英文环境不用管）。
+impl Default for Lang {
+    fn default() -> Self {
+        Lang::En
+    }
+}
+
+/// locale 的来源。实现方负责回答「这台机器说哪种语言」。
+pub trait LocaleSource {
+    /// 原始 locale 标签（`None` = 取不到，不是「英文」的断言）。
+    fn locale(&self) -> Option<String>;
+
+    /// 这个源在启动日志里的名字（`registry` / `env` / …）。默认 `injected`（测试用）。
+    fn label(&self) -> &'static str {
+        "injected"
+    }
+}
+
+/// [`Detection::origin`]：结论来自 `ui.language` 的显式值。
+pub const ORIGIN_SETTING: &str = "setting";
+/// [`Detection::origin`]：结论来自环境变量（[`EnvLocale`]）。
+pub const ORIGIN_ENV: &str = "env";
+/// [`Detection::origin`]：一个源都没取到，落到默认英文。
+pub const ORIGIN_DEFAULT: &str = "default";
+
+/// 进程环境变量式 locale 源（POSIX 语义；Windows 上基本取不到，见模块文档）。
+#[derive(Debug, Clone, Copy, Default)]
+pub struct EnvLocale;
+
+impl LocaleSource for EnvLocale {
+    fn locale(&self) -> Option<String> {
+        // POSIX 优先级：LC_ALL > LC_MESSAGES > LANG。空串按「没设置」处理。
+        ["LC_ALL", "LC_MESSAGES", "LANG"]
+            .iter()
+            .find_map(|name| env::var(name).ok().filter(|value| !value.trim().is_empty()))
+    }
+
+    fn label(&self) -> &'static str {
+        ORIGIN_ENV
+    }
+}
+
+/// 探测结论（`raw` 与 `origin` 一起带出来，是为了日志能解释「为什么是英文」）。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Detection {
+    /// 结论。
+    pub lang: Lang,
+    /// 原始 locale 标签（`None` = 一个源都没取到）。
+    pub raw: Option<String>,
+    /// 结论的来源（`setting` / 平台源自己的 [`LocaleSource::label`] / `env` / `default`）。
+    pub origin: &'static str,
+}
+
+impl Detection {
+    /// 一行日志（`lang=zh-CN locale=zh-CN source=registry` / `lang=en locale=<未设置> source=default`）。
+    #[must_use]
+    pub fn describe(&self) -> String {
+        format!(
+            "lang={} locale={} source={}",
+            self.lang.tag(),
+            self.raw.as_deref().unwrap_or("<未设置>"),
+            self.origin
+        )
+    }
+}
+
+/// 用给定来源探测语言。
+#[must_use]
+pub fn detect(source: &dyn LocaleSource) -> Detection {
+    match source.locale() {
+        Some(raw) => Detection {
+            lang: Lang::from_locale(&raw),
+            raw: Some(raw),
+            origin: source.label(),
+        },
+        None => Detection {
+            lang: Lang::En,
+            raw: None,
+            origin: ORIGIN_DEFAULT,
+        },
+    }
+}
+
+/// 用进程环境变量探测语言。
+#[must_use]
+pub fn detect_env() -> Detection {
+    detect(&EnvLocale)
+}
+
+/// 全量优先级：**`ui.language` 显式值 > 平台源 > POSIX 环境变量 > 英文**。
+///
+/// - `setting`：配置里 `ui.language` 的原文（`zh_cn` / `en_us`）。给了但不认识 → **跳过**
+///   （当作「没配」继续往下走，而不是把它猜成某种语言）；
+/// - `platform`：平台真值源（Windows 上是 `app-iced::platform::locale` 读注册表；其它平台没有）；
+/// - `env`：`LC_ALL > LC_MESSAGES > LANG`（[`EnvLocale`]）；
+/// - 都不给 → [`Lang::En`]，`origin = default`。
+///
+/// 这正是 D28 要的顺序：**用户手选的**压过系统，系统压过环境变量，都没有就英文。
+#[must_use]
+pub fn resolve(
+    setting: Option<&str>,
+    platform: &dyn LocaleSource,
+    env: &dyn LocaleSource,
+) -> Detection {
+    if let Some(value) = setting {
+        if let Some(lang) = Lang::from_setting(value) {
+            return Detection {
+                lang,
+                raw: Some(value.to_owned()),
+                origin: ORIGIN_SETTING,
+            };
+        }
+    }
+
+    let from_platform = detect(platform);
+    if from_platform.raw.is_some() {
+        return from_platform;
+    }
+
+    detect(env)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct Fixed(Option<&'static str>);
+
+    impl LocaleSource for Fixed {
+        fn locale(&self) -> Option<String> {
+            self.0.map(str::to_owned)
+        }
+    }
+
+    #[test]
+    fn locale_truth_table() {
+        // 抓得住：主语言子标签的解析（分隔符 / 大小写 / codeset / 修饰符 / 变体）。
+        // 抓不住：这些字符串是否真的是这台机器的 locale——真值来自 LocaleSource 实现。
+        let zh = [
+            "zh",
+            "zh_CN",
+            "zh_CN.UTF-8",
+            "zh-CN",
+            "zh-Hans-CN",
+            "zh_hans_cn",
+            "ZH_cn",
+            "  zh_TW  ",
+            "zh_CN.GB18030@euro",
+        ];
+        for tag in zh {
+            assert_eq!(Lang::from_locale(tag), Lang::ZhCn, "{tag}");
+        }
+
+        let en = [
+            "",
+            "C",
+            "POSIX",
+            "en",
+            "en_US.UTF-8",
+            "en-GB",
+            "ja_JP.UTF-8",
+            "fr_FR@euro",
+            "de",
+            // 不是中文但含 zh 之外的字：必须落英文，不许猜成中文
+            "zhuang",
+        ];
+        for tag in en {
+            assert_eq!(Lang::from_locale(tag), Lang::En, "{tag}");
+        }
+    }
+
+    #[test]
+    fn detect_falls_back_to_english_without_a_locale() {
+        // 抓得住：取不到 locale 时**不 panic、不猜中文**（D28 的「纯英文环境不用管」）。
+        // 抓不住：Windows 上「环境变量取不到」是否等于用户真的说英文——那是平台源的活
+        // （`app-iced::platform::locale`），见下面 resolve 的优先级测试。
+        let detection = detect(&Fixed(None));
+        assert_eq!(detection.lang, Lang::En);
+        assert_eq!(detection.raw, None);
+        assert_eq!(detection.origin, ORIGIN_DEFAULT);
+        assert_eq!(
+            detection.describe(),
+            "lang=en locale=<未设置> source=default"
+        );
+        assert_eq!(Lang::default(), Lang::En);
+    }
+
+    #[test]
+    fn detect_uses_the_injected_source_verbatim() {
+        // 抓得住：探测结论确实来自注入源（不会被本机环境变量污染），且 origin 取自源自报的名字。
+        // 抓不住：EnvLocale 到底读了哪几个变量（那条路径只能靠人工/集成测试看日志）。
+        let detection = detect(&Fixed(Some("zh_CN.UTF-8")));
+        assert_eq!(detection.lang, Lang::ZhCn);
+        assert_eq!(detection.raw.as_deref(), Some("zh_CN.UTF-8"));
+        assert_eq!(detection.origin, "injected");
+        assert_eq!(
+            detection.describe(),
+            "lang=zh-CN locale=zh_CN.UTF-8 source=injected"
+        );
+        assert_eq!(EnvLocale.label(), "env");
+    }
+
+    #[test]
+    fn resolve_priority_is_setting_then_platform_then_env_then_english() {
+        // 抓得住：四级优先级的顺序本身（用户手选压过系统，系统压过环境变量，都没有才英文）；
+        //         以及「配置值不认识时不当成任何一种语言，继续往下走」。
+        // 抓不住：这些源在真机上到底读到什么（平台源的真机行为在 app-iced 侧测）。
+        struct Named(&'static str, Option<&'static str>);
+
+        impl LocaleSource for Named {
+            fn locale(&self) -> Option<String> {
+                self.1.map(str::to_owned)
+            }
+            fn label(&self) -> &'static str {
+                self.0
+            }
+        }
+
+        let registry_zh = Named("registry", Some("zh-CN"));
+        let env_en = Named("env", Some("en_US.UTF-8"));
+        let nothing = Named("registry", None);
+
+        // ① 配置显式值压过一切
+        let detection = resolve(Some("en_us"), &registry_zh, &env_en);
+        assert_eq!(
+            (detection.lang, detection.origin),
+            (Lang::En, ORIGIN_SETTING)
+        );
+        // ② 没配置（或配置不认识）→ 平台源
+        for setting in [None, Some("zh-CN"), Some("")] {
+            let detection = resolve(setting, &registry_zh, &env_en);
+            assert_eq!(
+                (detection.lang, detection.raw.as_deref(), detection.origin),
+                (Lang::ZhCn, Some("zh-CN"), "registry"),
+                "setting={setting:?}"
+            );
+        }
+        // ③ 平台源没有 → 环境变量
+        let detection = resolve(None, &nothing, &env_en);
+        assert_eq!(
+            (detection.lang, detection.origin),
+            (Lang::En, "env"),
+            "环境变量说是英文，但来源必须是 env"
+        );
+        // ④ 全没有 → 英文 + default
+        let detection = resolve(None, &nothing, &Named("env", None));
+        assert_eq!(
+            (detection.lang, detection.origin),
+            (Lang::En, ORIGIN_DEFAULT)
+        );
+    }
+
+    #[test]
+    fn setting_values_match_the_config_vocabulary() {
+        // 抓得住：本 crate 的配置词表被改动（改名会让已落盘的 ui.language 读不出来）。
+        // 抓不住：`core::setting::keys::LANGUAGES` 那边先改了——本 crate 不依赖 core（零依赖纪律），
+        // 所以这条只能靠接线 mission 写一条跨 crate 的 pin 测试，或让 core 反向引用这份词表。
+        let values = Lang::ALL
+            .iter()
+            .map(|lang| lang.setting_value())
+            .collect::<Vec<_>>();
+        assert_eq!(values, vec!["en_us", "zh_cn"]);
+        assert_eq!(Lang::from_setting("zh_cn"), Some(Lang::ZhCn));
+        assert_eq!(Lang::from_setting("en_us"), Some(Lang::En));
+    }
+
+    #[test]
+    fn setting_parsing_is_strict_where_locale_parsing_is_lenient() {
+        // 抓得住：宽松解析被误用到配置值上（`zh-CN` 是合法 locale 但不是合法配置值）。
+        // 抓不住：有人把非法值直接塞进配置（那是设置层的 schema 校验与该键的 enumeration 约束）。
+        for bogus in ["zh-CN", "ZH_CN", "zh", "", "en"] {
+            assert_eq!(Lang::from_setting(bogus), None, "{bogus}");
+        }
+        assert_eq!(Lang::from_locale("zh-CN"), Lang::ZhCn);
+    }
+}

crates/i18n/src/lib.rs

@@ -0,0 +1,45 @@
+//! # unlucky-i18n · 国际化地基（D28）
+//!
+//! 本 crate 只做**地基**，不接任何页面：语言探测、两套消息目录、缺译诊断、中文字体策略、
+//! 以及「core 的中文状态串怎么进 UI」的契约。页面侧接线的 mission 用它，而不是各自硬编码英文
+//! （先硬编码再全量重写就是本 crate 要避免的那条路）。
+//!
+//! | 模块 | 职责 | 不负责 |
+//! |---|---|---|
+//! | [`lang`] | `Lang`（en / zh-CN）+ locale 探测（源可注入）+ **四级优先级** [`lang::resolve`] | 读注册表 / 读配置 / spawn 进程 |
+//! | [`choice`] | `LangChoice`（跟随系统 / 手选）：设置页那一档 + 它到生效语言的映射 | 落盘（那是 `presenter::settings_bridge`） |
+//! | [`catalog`] | `Key` 枚举 + 中英两套常量表 + 取词 / 占位符渲染 + 缺译诊断 | 排版、字号、断行 |
+//! | [`font`] | 中文环境扫系统 CJK 字体的**判据** + 缺字体时的「需下载」信号 + 注入式下载器接口 | 联网、写文件、装字体 |
+//! | [`bridge`] | core / presenter 的状态串 → `Key` 的**示例契约**（文案边界规则全文在这里） | 改 core 的产出 |
+//!
+//! 语言从哪来的优先级写在 [`lang::resolve`]：**`ui.language` 显式值 > 平台源 > POSIX 环境变量 > 英文**。
+//! 平台源（Windows 上 `reg.exe` 读注册表，零 FFI）在 UI 壳层实现并注入——本 crate 不认平台。
+//!
+//! ## 三条硬规矩（细则见 [`bridge`]）
+//!
+//! 1. **一句话 = 一个 key**。UI 侧不得把片段拼成一句话，尤其不得拼中文：
+//!    `"Launch failed · exit0 静默失败"` 这种混排就是拼接的后果。带变量的句子用 `{name}` 占位符，
+//!    由 [`catalog::Catalog::render`] 统一替换。
+//! 2. **core 的中文串不是文案**。core / presenter 里的中文状态串（`原版` / `静默失败（…）`）只用于
+//!    日志与 CLI；UI 要么走结构化出口（枚举）映射到 key，要么走 [`bridge::key_of_legacy_status`] 的
+//!    过渡表。**任何情况下都不许把未知中文串直接画到界面上。**
+//! 3. **英文环境零中文负担**（D28 原话）：`Lang::En` 下不要求任何中文字体、不触发任何下载；
+//!    判据在 [`font::decide`]，是纯函数，可脱机单测。
+//!
+//! ## 与别处的关系
+//!
+//! - **不依赖 iced / slint / presenter / core**：`cargo tree -p unlucky-i18n --edges normal` 只应打印它自己。
+//!   系统字体扫描由 UI 壳层做（iced 版在 `crates/app-iced/src/fonts/cjk.rs`），扫出来的族名喂给
+//!   [`font::decide`]；
+//! - 配置里的 `ui.language` 允许值 `zh_cn` / `en_us`（见 `core::setting::keys::LANGUAGES`）与
+//!   [`lang::Lang::setting_value`] 必须是同一份词表，由 [`lang`] 的 pin 测试守门。
+
+pub mod bridge;
+pub mod catalog;
+pub mod choice;
+pub mod font;
+pub mod lang;
+
+pub use catalog::{Catalog, Key};
+pub use choice::LangChoice;
+pub use lang::Lang;