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/server/ai/registry.test.ts

@@ -2,13 +2,25 @@ import { describe, expect, mock, test } from "bun:test";
 
 import { createMigratedTestDatabase } from "../../helpers";
 
+let generateTextImpl: (_opts: unknown) => unknown = () => ({});
+
+void mock.module("ai", () => ({
+  createProviderRegistry: (providers: Record<string, { languageModel: (modelId: string) => unknown }>) => ({
+    languageModel: (id: string) => {
+      const [providerId, modelId] = id.split(":");
+      const provider = providers[providerId ?? ""];
+      if (!provider || !modelId) throw new Error(`No such provider: ${id}`);
+      return provider.languageModel(modelId);
+    },
+  }),
+  generateText: mock((opts: unknown) => generateTextImpl(opts)),
+}));
+
 describe("AI registry", () => {
   test("testProviderConnection rejects invalid config", async () => {
-    void mock.module("ai", () => ({
-      generateText: mock(() => {
-        throw new Error("Connection failed");
-      }),
-    }));
+    generateTextImpl = () => {
+      throw new Error("Connection failed");
+    };
 
     const { testProviderConnection } = await import("../../../src/server/ai/registry");
 
@@ -25,9 +37,7 @@ describe("AI registry", () => {
   });
 
   test("testProviderConnection return shape is correct", async () => {
-    void mock.module("ai", () => ({
-      generateText: mock((_opts: unknown) => ({})),
-    }));
+    generateTextImpl = () => ({});
 
     const { testProviderConnection } = await import("../../../src/server/ai/registry");
 
@@ -61,6 +71,7 @@ describe("AI registry", () => {
     const registry = buildProviderRegistry(handle.db);
 
     expect(() => registry.languageModel("pv1:gpt-4o")).not.toThrow();
+    expect(() => registry.languageModel("pv2:claude-3")).toThrow();
 
     handle.cleanup();
   });