feat: open Changes as a workspace tab (#2298)

Open the complete working comparison in a desktop workspace tab while preserving inline sidebar diffs when the tab is closed.

Working and commit comparisons share one diff panel, and workspace layout is the sole owner of live tab persistence and identity.

Refs #1520

packages/app/src/i18n/resources/zh-CN.ts

@@ -750,6 +750,8 @@ export const zhCN: TranslationResources = {
         },
       },
       diff: {
+        openChangesTab: "打开“更改”标签页",
+        closeChangesTab: "关闭“更改”标签页",
         binaryFile: "二进制文件",
         tooLarge: "Diff 过大，无法显示",
         unified: "Unified diff",
@@ -1475,6 +1477,8 @@ export const zhCN: TranslationResources = {
       changesLabel: "更改",
       changesSubtitle: "工作区差异",
       commitSubtitle: "提交差异",
+      uncommittedSubtitle: "未提交的更改",
+      baseSubtitle: "与 {{baseRef}} 比较",
       directoryMissing: "未找到 workspace 目录。",
       empty: "没有更改",
       loadError: "加载差异失败",