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/main/services/search-service.ts

@@ -12,8 +12,8 @@ export class SearchService {
   constructor(private root: string, private fileService: { getRoot: () => string }) {}
 
   // 遍历库读取所有文档，建立简易索引（M4：内存全量，大库后续优化）
-  private async readAll(): Promise<{ path: string; title: string; body: string; tags: string[] }[]> {
-    const out: { path: string; title: string; body: string; tags: string[] }[] = [];
+  private async readAll(): Promise<{ path: string; title: string; body: string; tags: string[]; links: string[] }[]> {
+    const out: { path: string; title: string; body: string; tags: string[]; links: string[] }[] = [];
     const walk = async (dirAbs: string, dirRel: string) => {
       const entries = await fs.readdir(dirAbs, { withFileTypes: true });
       for (const e of entries) {
@@ -25,7 +25,7 @@ export class SearchService {
           const raw = await fs.readFile(abs, 'utf8');
           const { meta, body } = splitFrontmatter(raw);
           const relPosix = rel.split(nodePath.sep).join('/');
-          out.push({ path: relPosix, title: meta.title ?? e.name.slice(0, -MD_EXT.length), body, tags: meta.tags ?? [] });
+          out.push({ path: relPosix, title: meta.title ?? e.name.slice(0, -MD_EXT.length), body, tags: meta.tags ?? [], links: meta.links ?? [] });
         }
       }
     };
@@ -39,7 +39,7 @@ export class SearchService {
     const all = await this.readAll();
     const hits: SearchHit[] = [];
     for (const d of all) {
-      const hay = (d.title + '\n' + d.body).toLowerCase();
+      const hay = (d.title + '\n' + d.body + '\n' + d.tags.join(' ') + '\n' + (d.links ?? []).join(' ')).toLowerCase();
       const idx = hay.indexOf(q);
       if (idx !== -1) {
         // 摘要：命中位置附近，超长截尾保留 ~120 字符
@@ -58,4 +58,14 @@ export class SearchService {
     for (const d of all) for (const t of d.tags) m.set(t, (m.get(t) ?? 0) + 1);
     return [...m.entries()].map(([tag, count]) => ({ tag, count })).sort((a, b) => a.tag.localeCompare(b.tag));
   }
+
+  // FR-R7：返回标签→文档路径列表映射，供 FileTree AND 过滤
+  async tagPaths(): Promise<Record<string, string[]>> {
+    const all = await this.readAll();
+    const m = new Map<string, string[]>();
+    for (const d of all) for (const t of d.tags) { const arr = m.get(t) ?? []; arr.push(d.path); m.set(t, arr); }
+    const out: Record<string, string[]> = {};
+    for (const [tag, paths] of m) out[tag] = paths;
+    return out;
+  }
 }