feat: add CLI config preview API for Codex and Gemini

- Implemented `fetchCodexConfigPreview` and `fetchGeminiConfigPreview` functions in the API layer to retrieve masked configuration files.
- Added new interfaces `CodexConfigPreviewResponse` and `GeminiConfigPreviewResponse` to define the structure of the API responses.
- Created utility functions to read and mask sensitive values from `config.toml` and `auth.json` for Codex, and `settings.json` for Gemini.
- Updated CLI settings routes to handle new preview endpoints.
- Enhanced session content parser to support Claude JSONL format.
- Updated UI components to reflect changes in history page and navigation, including new tabs for observability.
- Localized changes for English and Chinese languages to reflect "CLI History" terminology.

ccw/frontend/src/locales/en/common.json

@@ -245,7 +245,7 @@
       "coordinator": "Coordinator",
       "executions": "Executions",
       "loops": "Loops",
-      "history": "History",
+      "history": "CLI History",
       "memory": "Memory",
       "prompts": "Prompts",
       "skills": "Skills",

ccw/frontend/src/locales/en/navigation.json

@@ -12,7 +12,7 @@
     "sessions": "Sessions",
     "liteTasks": "Lite Tasks",
     "project": "Project",
-    "history": "History",
+    "history": "CLI History",
     "orchestrator": "Orchestrator",
     "coordinator": "Coordinator",
     "loops": "Loop Monitor",

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

@@ -245,7 +245,7 @@
       "coordinator": "协调器",
       "executions": "执行监控",
       "loops": "循环",
-      "history": "历史",
+      "history": "CLI执行历史",
       "memory": "记忆",
       "prompts": "提示词",
       "skills": "技能",

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

@@ -12,7 +12,7 @@
     "sessions": "会话",
     "liteTasks": "轻量任务",
     "project": "项目",
-    "history": "历史",
+    "history": "CLI执行历史",
     "orchestrator": "编排器",
     "coordinator": "协调器",
     "loops": "循环监控",