feat(presenter): 多根发现（配置根 + 官方启动器标准位置），实例按自己的根解析存档/模组/启动（M274）

crates/i18n/src/catalog/golden.rs

@@ -160,6 +160,7 @@ pub(super) const GOLDEN: &[(&str, &str, &str)] = &[
     ("InstancesDiscoveredNote", "Discovered in versions/: where it runs is decided by the files that are already there.", "在版本目录里自动发现：它从哪里启动，由盘上已有的文件决定。"),
     ("InstancesDiscoveredRunShared", "Detected instance: it has no mods/ or saves/ of its own, so this launch uses the .minecraft folder (shared).", "自动发现的实例：它的版本目录里没有 mods/ 或 saves/，这次启动按共用目录运行（.minecraft 根目录）。"),
     ("InstancesDiscoveredRunIsolated", "Detected instance: it already has its own mods/ or saves/, so this launch uses its version folder (isolated).", "自动发现的实例：它的版本目录里已经有 mods/ 或 saves/，这次启动按独立目录运行（它自己的版本文件夹）。"),
+    ("InstancesSavesSource", "Saves folder: {dir}", "存档目录：{dir}"),
 ];
 
 /// 金表的**全量**行（本文件 → [`tail`] → [`tail_ai`] → [`tail2`]，顺序即 `Key::ALL`）。

crates/i18n/src/catalog/instances.rs

@@ -231,6 +231,11 @@ macro_rules! instances_entries {
             InstancesDiscoveredNote => ("Discovered in versions/: where it runs is decided by the files that are already there.", "在版本目录里自动发现：它从哪里启动，由盘上已有的文件决定。"),
             InstancesDiscoveredRunShared => ("Detected instance: it has no mods/ or saves/ of its own, so this launch uses the .minecraft folder (shared).", "自动发现的实例：它的版本目录里没有 mods/ 或 saves/，这次启动按共用目录运行（.minecraft 根目录）。"),
             InstancesDiscoveredRunIsolated => ("Detected instance: it already has its own mods/ or saves/, so this launch uses its version folder (isolated).", "自动发现的实例：它的版本目录里已经有 mods/ 或 saves/，这次启动按独立目录运行（它自己的版本文件夹）。"),
+            // ── 多根发现（M274）：存档区标明**这一份列表读自哪个目录**。
+            // 一打开启动器就能看见两个 `.minecraft`（便携目录 + 官方启动器那个）各自的实例，
+            // 两个根都可能有一个叫 `A` 的实例、各有一批世界。世界名本身分辨不出来源，
+            // 所以这份列表把**绝对路径**摆出来：那是唯一不会说谎的来源标识（也是排障要的东西）。
+            InstancesSavesSource => ("Saves folder: {dir}", "存档目录：{dir}"),
         } }
     };
 }