feat(presenter): 新建 unlucky-presenter，把 host/状态/DTO/设置桥从 app 迁出（M85 第 1 块）

D26（iced 重写）的关键一次性动作：UI 框架无关的宿主层独立成 crate，
Slint 版（crates/app）与 iced 版（crates/app-iced）共用，Slint 退役后不再重写一遍。

- 新建 crates/presenter（package `unlucky-presenter` / lib `unlucky_presenter`），
  workspace 登记 + crate 文档头写清「这层为什么存在」、对外表面、UI 侧允许/禁止、
  iced 接线骨架、以及哪些东西留在了 crates/app 及为什么。
- `git mv`（保留文件历史）迁入：host/（25 文件）、dto/（11 文件）、state.rs(+tests)、
  prefs.rs、settings_bridge.rs、toast.rs、router.rs、dialogs.rs、wizard.rs、
  mock.rs、mock_data.rs、backend.rs。模块路径与公开 API 名称不变（`host::install` 等），
  内部实现零改动。
- 新增 `theme`：把原本混在 ui_bind/theme_runtime 里的**纯判据**（CONFIG_POLL_TICKS /
  SYSTEM_THEME_POLL_TICKS / TILE_REGENERATE_STEP / BackgroundKey / tile_viewport /
  system_theme_value / 两个 poll 判据）抽出来，附 5 个单测；app 侧改成调用它们。
- crates/app 改为消费者：删掉迁走的文件，`crate::host|state|dto|prefs|settings_bridge|
  toast|router|dialogs|wizard|mock|mock_data|backend` 全部改写为 `unlucky_presenter::*`
  （64 处），backend.rs 的 config_path/build_backend 提为 pub。
- crates/app-iced 只登记 unlucky-presenter 依赖，本 mission 不接线。
- prefs.rs 的 2 处 slint 文档引用改写；`grep -rn slint crates/presenter` 现在无输出。

crates/app/src/conv/agent.rs

@@ -1,10 +1,10 @@
 //! AI 页与覆盖层：会话消息、对话框（一次一条）、Toast。
 
-use crate::dialogs as dlg;
-use crate::dto::ChatRole as DtoChatRole;
-use crate::state::AppState;
-use crate::toast as toast_mod;
 use crate::{ChatRole, DialogKind, UiChatMessage, UiDialog, UiToast};
+use unlucky_presenter::dialogs as dlg;
+use unlucky_presenter::dto::ChatRole as DtoChatRole;
+use unlucky_presenter::state::AppState;
+use unlucky_presenter::toast as toast_mod;
 
 /// AI 会话消息。
 pub fn chat(state: &AppState) -> Vec<UiChatMessage> {

crates/app/src/conv/instances.rs

@@ -2,9 +2,9 @@
 
 use slint::Color;
 
-use crate::dto::{self, InstanceRuntime};
-use crate::state::{AppState, TileCell};
 use crate::{LoaderKind, RuntimePhase, UiTile};
+use unlucky_presenter::dto::{self, InstanceRuntime};
+use unlucky_presenter::state::{AppState, TileCell};
 
 /// 头像/图标占位的底色池（Metro 强调色系，按 id 哈希稳定取色）。
 const HUES: [u32; 8] = [

crates/app/src/conv/logs.rs

@@ -1,8 +1,8 @@
 //! 日志页：会话列表、日志行、D8 诊断卡片。
 
-use crate::dto::{LogLevel as DtoLogLevel, LogOutcome as DtoLogOutcome};
-use crate::state::AppState;
 use crate::{LogLevel, LogOutcome, UiDiagnosis, UiLogLine, UiLogSession};
+use unlucky_presenter::dto::{LogLevel as DtoLogLevel, LogOutcome as DtoLogOutcome};
+use unlucky_presenter::state::AppState;
 
 /// 日志会话列表。
 pub fn log_sessions(state: &AppState) -> Vec<UiLogSession> {

crates/app/src/conv/pages.rs

@@ -5,17 +5,17 @@
 
 use slint::{ModelRc, SharedString, VecModel};
 
-use crate::dto::{
-    AccountKind as DtoAccountKind, DeviceLoginPhase, InstallStage as DtoInstallStage,
-    JavaChainOutcome, NoticeLevel, SettingControl, VersionKind as DtoVersionKind,
-};
-use crate::state::AppState;
-use crate::wizard::WizardStep;
 use crate::{
     AccountKind, InstallStage, JavaStepOutcome, NoticeKind, SettingControl as UiControl, UiAccount,
     UiDeviceCode, UiInstallProgress, UiJavaRuntime, UiJavaStep, UiJavaVendor, UiNotice,
     UiSettingGroup, UiSettingRow, UiVersion, UiWizard,
 };
+use unlucky_presenter::dto::{
+    AccountKind as DtoAccountKind, DeviceLoginPhase, InstallStage as DtoInstallStage,
+    JavaChainOutcome, NoticeLevel, SettingControl, VersionKind as DtoVersionKind,
+};
+use unlucky_presenter::state::AppState;
+use unlucky_presenter::wizard::WizardStep;
 
 fn strings(items: &[String]) -> ModelRc<SharedString> {
     ModelRc::new(VecModel::from(
@@ -162,8 +162,8 @@ pub fn install(state: &AppState) -> UiInstallProgress {
         bytes_label: if progress.bytes_total > 0 {
             format!(
                 "{}/{}",
-                crate::dto::human_bytes(progress.bytes_done),
-                crate::dto::human_bytes(progress.bytes_total)
+                unlucky_presenter::dto::human_bytes(progress.bytes_done),
+                unlucky_presenter::dto::human_bytes(progress.bytes_total)
             )
         } else {
             String::new()
@@ -236,7 +236,7 @@ pub fn wizard(state: &AppState) -> UiWizard {
     let step = wizard.step;
     let can_next = match step {
         WizardStep::Version => !wizard.version.trim().is_empty(),
-        WizardStep::Name => crate::wizard::validate_name(&wizard.name).is_ok(),
+        WizardStep::Name => unlucky_presenter::wizard::validate_name(&wizard.name).is_ok(),
         WizardStep::Loader | WizardStep::Confirm => true,
         WizardStep::Progress => false,
     };
@@ -248,7 +248,7 @@ pub fn wizard(state: &AppState) -> UiWizard {
         step_total: 5,
         version: wizard.version.as_str().into(),
         loader: loader_index(wizard.loader),
-        loader_label: if wizard.loader == crate::dto::LoaderKind::Vanilla {
+        loader_label: if wizard.loader == unlucky_presenter::dto::LoaderKind::Vanilla {
             "原版".to_string()
         } else {
             format!("{} {}", wizard.loader.label(), wizard.loader_version.trim())
@@ -265,14 +265,15 @@ pub fn wizard(state: &AppState) -> UiWizard {
 }
 
 /// 加载器在向导里的单选序号（与 `wizard.slint` 的 LoaderChoice 顺序一致）。
-pub fn loader_index(loader: crate::dto::LoaderKind) -> i32 {
+pub fn loader_index(loader: unlucky_presenter::dto::LoaderKind) -> i32 {
     match loader {
-        crate::dto::LoaderKind::Vanilla => 0,
-        crate::dto::LoaderKind::Fabric => 1,
-        crate::dto::LoaderKind::Quilt => 2,
-        crate::dto::LoaderKind::Forge => 3,
-        crate::dto::LoaderKind::NeoForge => 4,
-        crate::dto::LoaderKind::OptiFine | crate::dto::LoaderKind::LiteLoader => 0,
+        unlucky_presenter::dto::LoaderKind::Vanilla => 0,
+        unlucky_presenter::dto::LoaderKind::Fabric => 1,
+        unlucky_presenter::dto::LoaderKind::Quilt => 2,
+        unlucky_presenter::dto::LoaderKind::Forge => 3,
+        unlucky_presenter::dto::LoaderKind::NeoForge => 4,
+        unlucky_presenter::dto::LoaderKind::OptiFine
+        | unlucky_presenter::dto::LoaderKind::LiteLoader => 0,
     }
 }
 

crates/app/src/conv/pages_tests.rs

@@ -1,12 +1,12 @@
 //! conv/pages.rs 的单测（拆文件守 400 行上限）。
 
 use super::*;
-use crate::dto::{
+use slint::Model;
+use unlucky_presenter::dto::{
     AccountView, DeviceLoginView, InstallProgressView, JavaPageView, JavaVendorView, NoticeView,
     SettingGroupView, SettingRowView, VersionSummary,
 };
-use crate::wizard::WizardState;
-use slint::Model;
+use unlucky_presenter::wizard::WizardState;
 
 #[test]
 fn accounts_and_device_login_render() {
@@ -90,7 +90,7 @@ fn java_chain_and_vendors_map_outcomes() {
             sources: vec!["BMCLAPI".to_string(), "GitHub".to_string()],
             installed: true,
         }],
-        chain: vec![crate::dto::JavaChainStep {
+        chain: vec![unlucky_presenter::dto::JavaChainStep {
             vendor: "temurin".to_string(),
             outcome: JavaChainOutcome::Hit,
             detail: "21".to_string(),
@@ -161,7 +161,7 @@ fn wizard_versions_skip_ancient_ones() {
         },
         VersionSummary {
             id: "rd-132211".to_string(),
-            kind: DtoVersionKind::Ancient(crate::dto::AncientKind::Classic),
+            kind: DtoVersionKind::Ancient(unlucky_presenter::dto::AncientKind::Classic),
             released: "2009-05-13".to_string(),
             installed: false,
         },

crates/app/src/conv/ui.rs

@@ -1,9 +1,9 @@
 //! UI 偏好/路由枚举的双向映射（Slint 枚举 ↔ 状态层枚举）。
 
-use crate::dto::{self, VersionCategory};
-use crate::prefs;
-use crate::router;
 use crate::{BgFillKind, DownloadCategory, InstanceView, RouteKind, ThemeMode, TileSize};
+use unlucky_presenter::dto::{self, VersionCategory};
+use unlucky_presenter::prefs;
+use unlucky_presenter::router;
 
 /// 路由 → 导航高亮/页面选择。
 pub fn route(route: &router::Route) -> RouteKind {

crates/app/src/conv/versions.rs

@@ -1,8 +1,10 @@
 //! 版本列表与下载分类映射（下载页）。
 
-use crate::dto::{AncientKind, VersionCategory, VersionKind as DtoVersionKind, VersionSummary};
-use crate::state::AppState;
 use crate::{UiVersion, VersionKind};
+use unlucky_presenter::dto::{
+    AncientKind, VersionCategory, VersionKind as DtoVersionKind, VersionSummary,
+};
+use unlucky_presenter::state::AppState;
 
 /// 分类侧栏 → 该分类下的版本（远古版按子类细分）。
 pub fn in_category(category: VersionCategory, kind: DtoVersionKind) -> bool {
@@ -58,8 +60,8 @@ fn version_kind(kind: DtoVersionKind) -> VersionKind {
 #[cfg(test)]
 mod tests {
     use super::versions;
-    use crate::dto::{VersionKind, VersionSummary};
-    use crate::state::AppState;
+    use unlucky_presenter::dto::{VersionKind, VersionSummary};
+    use unlucky_presenter::state::AppState;
 
     fn state_with_versions() -> AppState {
         let mut state = AppState::new();