Add tests and implement functionality for staged cascade search and LSP expansion

- Introduced a new JSON file for verbose output of the Codex Lens search results.
- Added unit tests for binary search functionality in `test_stage1_binary_search_uses_chunk_lines.py`.
- Implemented regression tests for staged cascade Stage 2 expansion depth in `test_staged_cascade_lsp_depth.py`.
- Created unit tests for staged cascade Stage 2 realtime LSP graph expansion in `test_staged_cascade_realtime_lsp.py`.
- Enhanced the ChainSearchEngine to respect configuration settings for staged LSP depth and improve search accuracy.

ccw/frontend/src/locales/zh/workspace.json

@@ -12,7 +12,12 @@
     "dialog": {
       "title": "选择项目文件夹",
       "placeholder": "输入项目路径...",
-      "help": "您的项目目录路径"
+      "help": "您的项目目录路径",
+      "selectCurrent": "选择此文件夹",
+      "parentDir": "上级目录",
+      "loading": "加载中...",
+      "emptyDir": "空目录",
+      "accessDenied": "无法访问此目录"
     }
   },
   "actions": {