feat(inbox): 素材持久化 CRUD — 数据库表 + API + 前端接入

- 新增 materials 表（id/projectId/description/associatedDate/status/createdAt/updatedAt）
- 新增 4 个后端 API 路由（list/create/get/delete）+ 13 个测试
- 新增 use-materials hooks（TanStack Query）
- 收集箱页面重构为三层架构（InboxPage + MaterialSidebar + MaterialDetailPanel）
- MaterialCard: Popconfirm 删除确认 + 粗粒度时间格式
- MaterialContent: 展示状态标签 + createdAt
- 更新开发文档 backend.md / frontend.md

tests/web/features/inbox/MaterialContent.test.tsx

@@ -2,28 +2,39 @@ import { screen } from "@testing-library/react";
 import { describe, expect, test } from "bun:test";
 import { createElement } from "react";
 
-import type { Material } from "../../../../src/web/features/inbox/types";
+import type { Material } from "../../../../src/shared/api";
 
 import { MaterialContent } from "../../../../src/web/features/inbox/components/MaterialContent";
 import { renderWithProviders } from "../../test-utils";
 
 const MOCK_MATERIAL: Material = {
   associatedDate: "2026-06-03",
-  createdAt: new Date().toISOString(),
+  createdAt: "2026-06-03T00:00:00.000Z",
   description: "详细描述内容",
   id: "test-id",
+  projectId: "project-1",
+  status: "pending",
+  updatedAt: "2026-06-03T00:00:00.000Z",
 };
 
 describe("MaterialContent", () => {
-  test("未选中时显示空状态提示", () => {
-    renderWithProviders(createElement(MaterialContent, { material: null }));
-    expect(screen.getByText("请在左侧选择素材")).not.toBeNull();
-  });
-
-  test("选中时展示素材详情", () => {
+  test("展示素材详情和状态", () => {
     renderWithProviders(createElement(MaterialContent, { material: MOCK_MATERIAL }));
     expect(screen.getByText("素材详情")).not.toBeNull();
     expect(screen.getByText("详细描述内容")).not.toBeNull();
     expect(screen.getByText("2026-06-03")).not.toBeNull();
+    expect(screen.getByText("待审核")).not.toBeNull();
+  });
+
+  test("展示已通过状态", () => {
+    const approved: Material = { ...MOCK_MATERIAL, status: "approved" };
+    renderWithProviders(createElement(MaterialContent, { material: approved }));
+    expect(screen.getByText("已通过")).not.toBeNull();
+  });
+
+  test("展示已放弃状态", () => {
+    const discarded: Material = { ...MOCK_MATERIAL, status: "discarded" };
+    renderWithProviders(createElement(MaterialContent, { material: discarded }));
+    expect(screen.getByText("已放弃")).not.toBeNull();
   });
 });