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

src/server/routes/providers/test.ts

@@ -1,6 +1,6 @@
 import type Database from "bun:sqlite";
 
-import type { RuntimeMode } from "../../../shared/api";
+import type { CreateProviderRequest, RuntimeMode } from "../../../shared/api";
 
 import { testProviderConnection } from "../../ai/registry";
 import { getProvider } from "../../db/providers";
@@ -32,3 +32,47 @@ export async function handleTestProvider(req: Request, db: Database, mode: Runti
 
   return jsonResponse({ providerTestResponse: testResult }, { mode });
 }
+
+export async function handleTestProviderConfig(req: Request, _db: Database, mode: RuntimeMode): Promise<Response> {
+  const validated = await readProviderConfig(req, mode);
+  if (validated instanceof Response) return validated;
+
+  const testResult = await testProviderConnection({
+    apiKey: validated.apiKey,
+    baseUrl: validated.baseUrl,
+    name: validated.name,
+    type: validated.type,
+  });
+
+  return jsonResponse({ providerTestResponse: testResult }, { mode });
+}
+
+async function readProviderConfig(req: Request, mode: RuntimeMode): Promise<CreateProviderRequest | Response> {
+  let body: CreateProviderRequest;
+  try {
+    body = (await req.json()) as CreateProviderRequest;
+  } catch {
+    return jsonResponse(createApiError("Invalid JSON body", 400), { mode, status: 400 });
+  }
+
+  if (!body.name || typeof body.name !== "string") {
+    return jsonResponse(createApiError("name is required", 400), { mode, status: 400 });
+  }
+
+  if (!body.baseUrl || typeof body.baseUrl !== "string") {
+    return jsonResponse(createApiError("baseUrl is required", 400), { mode, status: 400 });
+  }
+
+  if (!body.apiKey || typeof body.apiKey !== "string") {
+    return jsonResponse(createApiError("apiKey is required", 400), { mode, status: 400 });
+  }
+
+  if (!body.type || !["anthropic", "openai", "openai-compatible"].includes(body.type)) {
+    return jsonResponse(createApiError("type must be one of: openai, anthropic, openai-compatible", 400), {
+      mode,
+      status: 400,
+    });
+  }
+
+  return body;
+}