feat(M4): FR-R2/R6/R7 搜索+标签筛选——search hay 加 tags+links 元数据(R2); TagFilter 加折叠按钮(R6); tagPaths IPC+FileTree AND 过滤选中标签的文档(R7); store 加 tagFilter; search-tag E2E 2 项

apps/desktop/src/renderer/store.ts

@@ -15,6 +15,7 @@ interface EditorState {
   body: string;
   meta: DocMeta;
   saveState: SaveState;
+  tagFilter: string[]; // FR-R7：选中标签列表，FileTree 据此 AND 过滤
   // actions
   loadVault: () => Promise<void>;
   loadTree: () => Promise<void>;
@@ -43,6 +44,7 @@ export const useStore = create<EditorState>((set, get) => ({
   body: '',
   meta: {},
   saveState: 'saved',
+  tagFilter: [],
 
   loadVault: async () => {
     const vault = await invoke(IPC.vaultList, undefined as never);