feat: PATH 配置文件/预设切换 — 保存、加载、一键应用不同场景的 PATH 配置

- 新增 profiles.rs: list/save/load/delete/rename 五个 Rust 命令
- 配置文件存储在 %APPDATA%/.patheditor/profiles/<name>.json
- ProfileDialog: 保存当前 PATH、加载预览、一键应用到注册表
- 工具栏新增「配置」按钮

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/hooks/use-app-actions.ts

@@ -20,6 +20,7 @@ export interface DialogState {
   setHelpOpen: (v: boolean) => void;
   setImportDialog: (v: DialogState['importDialog']) => void;
   setAnalyzeOpen: (v: boolean) => void;
+  setProfilesOpen: (v: boolean) => void;
 }
 
 export function useAppActions(activeTab: TabId, dialogs: DialogState) {