feat(trash): frontend trash API client + Pinia store

frontend/src/api/trash.ts

@@ -0,0 +1,28 @@
+import { apiGet, apiPost, apiDelete } from "@/api/client";
+
+export interface TrashItem {
+  type: string;
+  id: number;
+  title: string;
+}
+
+export interface TrashBatch {
+  batch_id: string;
+  deleted_at: string | null;
+  summary: string;
+  count: number;
+  items: TrashItem[];
+}
+
+export async function listTrash(): Promise<TrashBatch[]> {
+  const data = await apiGet<{ batches: TrashBatch[] }>("/api/trash");
+  return data.batches;
+}
+
+export async function restoreBatch(batchId: string): Promise<void> {
+  await apiPost(`/api/trash/${batchId}/restore`, {});
+}
+
+export async function purgeBatch(batchId: string): Promise<void> {
+  return apiDelete(`/api/trash/${batchId}`);
+}