feat(app): polish workspace tabs and changes

Size tabs from rendered labels and switch to horizontal overflow once minimum click targets are reached, keeping the add-tab action adjacent until it must remain fixed.

Make Changes an always-expanded document with an optional desktop navigation tree, keep Git actions in their platform-owned headers, remove pinned and inline split shortcuts, and place review tabs beside Changes.

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

@@ -600,8 +600,6 @@ export const zhCN: TranslationResources = {
         pullRequest: "拉取请求",
         terminalProfilesMenu: "Terminal profiles",
         editTerminalProfiles: "Edit profiles…",
-        pinTarget: "固定",
-        unpinTarget: "取消固定",
       },
       explorer: {
         open: "打开 explorer",
@@ -847,14 +845,12 @@ export const zhCN: TranslationResources = {
         switchToUnified: "切换到统一差异视图",
         switchToSplit: "切换到并排差异视图",
         showTreeView: "显示文件夹树",
-        showFlatView: "显示平铺文件列表",
+        hideTreeView: "隐藏文件夹树",
         options: "Diff 选项",
         hideWhitespace: "隐藏空白差异",
         showWhitespace: "显示空白差异",
         scrollLongLines: "滚动长行",
         wrapLongLines: "自动换行长行",
-        collapseAll: "折叠所有文件",
-        expandAll: "展开所有文件",
         collapseAllFolders: "折叠所有文件夹",
         expandAllFolders: "展开所有文件夹",
         refreshing: "正在刷新",