新增: 批次工作落地(推进链/评估闭环/事件总线/并发/加固) + 技术债清理 + 文档整理

后端:
- 工作流推进链(D-03):advance_task/状态机/闸门走 df-nodes Node trait,conditions 条件引擎扩展
- 想法评估闭环:启发式评分+对抗评估,df-ideas/scoring + df-storage/idea_eval_repo + idea 前端打通
- 全局事件数据总线:df-ai/context+context_helpers+augmentation 跨模块解耦
- AI planner/plan_hint/intent:aichat B 路线并行多轮基础
- patch_file 加固(TD-03/04):读改写整体锁防 lost update,expected_hash 合约闭环
- 压缩超时兜底(F-15 卡死根治)
- F-09 多会话并发:LlmConcurrency per-conv + streamingGuard 前端守护 + verify 脚本
- 知识注入 DRY/skills/audit 扩展

清理:
- aichat 技术债(误报 allow/死导入/过时注释 30 项)
- URGENT.md 删除(11 项加急全解决/迁 todo)
- 文档整理(todo/待决策/待审查/ARCHITECTURE/INDEX + 总线/技术债审查新文档)

src/i18n/en/aiTool.ts

@@ -29,6 +29,9 @@ export default {
     dirFallback: 'List Directory',
     writePrefix: 'Write',
     writeFallback: 'Write File',
+    // grep cross-file content search header (F-260621)
+    grepPrefix: 'Search',
+    grepFallback: 'Content Search',
     // CRUD tool display names (delete/restore/purge/update_project resolve project name by id; fallback when no id or unresolved)
     deletePrefix: 'Delete Project',
     deleteFallback: 'Delete Project',
@@ -88,6 +91,12 @@ export default {
     httpTruncated: 'Response truncated ({bytes}), see details',
     httpRequestFallback: 'HTTP Request',
     foundN: 'Found {n}',
+    // grep cross-file content search results (F-260621): per output_mode phrasing
+    grepHitsN: '{n} hits',
+    grepFilesN: '{n} files',
+    grepCountSummary: '{n} hits / {files} files',
+    grepCountLines: '{n} hits',
+    grepTruncated: 'Results truncated (max reached), narrow pattern or add glob',
     boundDir: 'Bound directory "{path}" stack: {stack}',
     deleteFilePermanent: 'Permanently deleted {path}',
     // UX-260618-07: soft-delete adds backup_path (trash filename so user knows where to recover from)
@@ -119,6 +128,7 @@ export default {
       readFile: 'Read File',
       writeFile: 'Write File',
       listDirectory: 'List Directory',
+      grep: 'Content Search',
       createTask: 'Create Task',
       createProject: 'Create Project',
       createIdea: 'Create Idea',