feat: add SpecDialog component for editing spec frontmatter

- Implement SpecDialog for managing spec details including title, read mode, priority, and keywords.
- Add validation and keyword management functionality.
- Integrate SpecDialog into SpecsSettingsPage for editing specs.

feat: create index file for specs components

- Export SpecCard, SpecDialog, and related types from a new index file for better organization.

feat: implement SpecsSettingsPage for managing specs and hooks

- Create main settings page with tabs for Project Specs, Personal Specs, Hooks, Injection, and Settings.
- Integrate SpecDialog and HookDialog for editing specs and hooks.
- Add search functionality and mock data for specs and hooks.

feat: add spec management API routes

- Implement API endpoints for listing specs, getting spec details, updating frontmatter, rebuilding indices, and initializing the spec system.
- Handle errors and responses appropriately for each endpoint.

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

@@ -38,7 +38,8 @@
     "teams": "Team Execution",
     "terminalDashboard": "Terminal Dashboard",
     "skillHub": "Skill Hub",
-    "analysis": "Analysis Viewer"
+    "analysis": "Analysis Viewer",
+    "specs": "Spec Settings"
   },
   "sidebar": {
     "collapse": "Collapse",

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

@@ -38,7 +38,8 @@
     "teams": "团队执行",
     "terminalDashboard": "终端仪表板",
     "skillHub": "技能中心",
-    "analysis": "分析查看器"
+    "analysis": "分析查看器",
+    "specs": "规范设置"
   },
   "sidebar": {
     "collapse": "收起",