feat: add config directory override support for WSL

- Add persistent app settings with custom Claude Code and Codex config directories
- Add config directory override UI in settings modal with manual input, browse, and reset options
- Integrate tauri-plugin-dialog for native directory picker
- Support WSL and other special environments where config paths need manual specification

Changes:
- settings.rs: Implement settings load/save and directory override logic
- SettingsModal: Add config directory override UI components
- API: Add get_config_dir and pick_directory commands

package.json

@@ -32,10 +32,11 @@
     "@codemirror/view": "^6.38.2",
     "@tailwindcss/vite": "^4.1.13",
     "@tauri-apps/api": "^2.8.0",
+    "@tauri-apps/plugin-dialog": "^2.4.0",
     "@tauri-apps/plugin-process": "^2.0.0",
     "@tauri-apps/plugin-updater": "^2.0.0",
-    "jsonc-parser": "^3.2.1",
     "codemirror": "^6.0.2",
+    "jsonc-parser": "^3.2.1",
     "lucide-react": "^0.542.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",