feat(expiry): NoteRepository.trashBatch atomic (#5 v0.2.3)

src/main/repository/NoteRepository.ts

@@ -241,6 +241,32 @@ export class NoteRepository {
     tx();
   }
 
+  /**
+   * Atomically transition a batch of notes from active → trash.
+   * Returns the number of notes that actually transitioned (i.e. were active
+   * before the call). Already-trashed and unknown ids are silent skips —
+   * counting them would inflate `expired_batch_trash` telemetry.
+   *
+   * Reuses `trash(id, deletedAt)` per row to inherit pending_jobs cleanup
+   * invariant (§9.2 of #4 spec).
+   */
+  trashBatch(ids: string[], deletedAt: string): { trashedCount: number } {
+    if (ids.length === 0) return { trashedCount: 0 };
+    let trashedCount = 0;
+    const tx = this.db.transaction((batch: string[]) => {
+      for (const id of batch) {
+        const row = this.db
+          .prepare(`SELECT deleted_at FROM notes WHERE id = ?`)
+          .get(id) as { deleted_at: string | null } | undefined;
+        if (!row || row.deleted_at !== null) continue;
+        this.trash(id, deletedAt);
+        trashedCount += 1;
+      }
+    });
+    tx(ids);
+    return { trashedCount };
+  }
+
   restore(id: string): void {
     const now = new Date().toISOString();
     this.db