优化: 前端批(审批体系一致 + GitChanges UI + token/控件统一 + 死代码)

审批体系一致:ApprovalPopup 浮窗加挂起时长提示(H1)+session 按钮+path deny 二次确认(M4/M5);ToolCard/useToolApproval 加 session+onDeny 确认(对齐 DirAuthDialog 四按钮)+ToolCardList decision 类型加 session;ApprovalDialog 失败显 toast(治 store 吞错 M31);ApprovalOverlay dismiss 改响应式(L26)

GitChanges UI(问题12 前端 12b-12h):showCommitFileDiff 精确匹配(12b)+去重 git log(12c)+详情滑出不挤压(12d)+双行提交行(12f)+搜索过滤(12g)+历史 Tab 显分支(12h)+diff 侧边栏内更宽可折叠面板(12e:FilePreview 不支持任意提交 diff,折中)

token+控件:global.css 定义 --df-primary(治幽灵变量 M26)+settings.css 加 .setting-number/.setting-input/.setting-textarea+4 Section 套用(问题8)

死代码:删 PlanProgress.vue(零引用)+PlanLayerInfo 类型+i18n 孤儿 key(L1)

src/i18n/en/aiChat.ts

@@ -1,8 +1,6 @@
 export default {
   aiChat: {
     // ── Multi-Agent parallel execution ──
-    planProgress: 'Execution Plan',
-    planLayer: 'Layer {n}',
     conflictsPending: '{n} conflicts to resolve',
     acceptA: 'Accept A',
     acceptB: 'Accept B',
@@ -182,6 +180,8 @@ export default {
     dirAuthAlways: 'Always',
     dirAuthDeny: 'Deny',
     dirAuthFailed: 'Authorization failed: {msg}',
+    // M5:path deny second confirmation (deny is irreversible — tool returns Err, loop continues without retry; asymmetry with approve, prevents mis-clicks)
+    dirAuthDenyConfirm: 'Deny authorization? The tool will fail immediately and will not be retried this round.',
 
     // ── Input Augmentation layer: mention/skill injection feedback ──
     // search_files blind search denied by whitelist fallback (no auth dialog; prompt user to use @mention or absolute path)