feat(v0211): rebuildFtsTagsForNote 헬퍼 + tags 변경 path 통합 (single write)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/main/repository/NoteRepository.ts

@@ -161,6 +161,7 @@ export class NoteRepository {
         linkTag.run(id, tagRow.id);
       }
       this.db.prepare(`DELETE FROM pending_jobs WHERE note_id=?`).run(id);
+      this.rebuildFtsTagsForNote(id);
     });
     tx();
   }
@@ -390,6 +391,7 @@ export class NoteRepository {
           const row = getOrInsert.get(t) as { id: number };
           link.run(id, row.id);
         }
+        this.rebuildFtsTagsForNote(id);
       }
     });
     tx();
@@ -851,6 +853,23 @@ export class NoteRepository {
       .run(nextRunAt, lastError.slice(0, 500), noteId);
   }
 
+  /**
+   * v0.2.11 Cut D — note_tags 변경 후 notes_fts.tags 컬럼 (csv) 재구성.
+   * 단일 write path 패턴: tags 변경하는 모든 메서드가 같은 transaction 끝에서 호출.
+   */
+  private rebuildFtsTagsForNote(noteId: string): void {
+    const row = this.db
+      .prepare(
+        `SELECT COALESCE(GROUP_CONCAT(t.name, ' '), '') AS csv
+           FROM note_tags nt JOIN tags t ON t.id = nt.tag_id
+          WHERE nt.note_id = ?`
+      )
+      .get(noteId) as { csv: string };
+    this.db
+      .prepare(`UPDATE notes_fts SET tags = ? WHERE note_id = ?`)
+      .run(row.csv, noteId);
+  }
+
   private hydrate(row: Record<string, unknown>): Note {
     const tags = this.db
       .prepare(