fix: 模型管理审查修复与归档

- 修复 registry 测试 ai mock 缺失 createProviderRegistry 导出
- 新增 POST /api/providers/test 支持未保存供应商配置连通性测试
- 供应商表单新增测试连接按钮，新建默认 openai-compatible
- 连通性测试按 ok 展示成功/失败，不再统一 success 样式
- 模型表单新建时也可测试供应商连接
- 模型页使用独立 provider 列表避免分页/搜索影响
- 移除模型管理组件内联 style
- 新增 ProviderTestResultResponse 共享响应类型
- 新增 bun run format:check 脚本
- 补充关键测试覆盖（删除关联、连通性、默认类型、表单测试）
- 更新 docs/user/usage.md、docs/development/*、design.md、tasks.md
- 归档 change 至 openspec/changes/archive/2026-05-29-add-model-management

tests/web/components/ModelTable.test.tsx

@@ -80,6 +80,8 @@ describe("ModelTable", () => {
     expect(screen.getByText("GPT-4o")).not.toBeNull();
     expect(screen.getByText("gpt-4o")).not.toBeNull();
     expect(screen.getByText("DeepSeek Chat")).not.toBeNull();
+    expect(screen.getByText("OpenAI")).not.toBeNull();
+    expect(screen.getByText("DeepSeek")).not.toBeNull();
   });
 
   test("模型表格操作触发 enable/disable/delete", async () => {

tests/web/components/ProviderTable.test.tsx

@@ -86,4 +86,26 @@ describe("ProviderTable", () => {
     fireEvent.click(enableButtons[0]!);
     await waitFor(() => expect(onEnable).toHaveBeenCalledWith("pv2"));
   });
+
+  test("供应商表格操作触发连接测试", async () => {
+    const onTest = mock(() => Promise.resolve({ message: "连接失败", ok: false }));
+
+    renderWithProviders(
+      createElement(ProviderTable, {
+        data: { items: [ENABLED_PROVIDER], page: 1, pageSize: 20, total: 1 },
+        loading: false,
+        onDelete: () => Promise.resolve(),
+        onDisable: () => Promise.resolve(),
+        onEdit: () => undefined,
+        onEnable: () => Promise.resolve(),
+        onPageChange: () => undefined,
+        onTest,
+        page: 1,
+        pageSize: 20,
+      }),
+    );
+
+    fireEvent.click(screen.getByRole("button", { name: "测试连接" }));
+    await waitFor(() => expect(onTest).toHaveBeenCalledWith("pv1"));
+  });
 });