refactor: Antigravity/Codex 服务重构为插件化适配器架构

- 将 Antigravity 和 Codex 从独立模块迁移至 src/services/provider/adapters/ 插件体系
- 新增 provider_types 和 oauth_token 模块，移除 maintenance_scheduler 中的 OAuth 定时刷新
- 增强 admin API：扩展 keys 和 provider_query 端点，新增 dashboard 路由
- 大幅增强 ProviderDetailDrawer 组件，新增 AntigravityQuotaDialog
- 改进 handler 基类（chat/cli）和错误分类器
- 优化 fetch_scheduler 和 upstream_fetcher
- 前端 UI 组件清理和优化
- 更新测试以匹配新模块结构

tests/services/test_request_builder_oauth.py

@@ -29,18 +29,19 @@ async def test_get_provider_auth_oauth_returns_decrypted_auth_config() -> None:
         provider=None,
     )
 
-    def _decrypt(v):  # noqa: ANN001
+    def _decrypt(v: str) -> str:
         if v == "enc_access":
             return "access-token"
         if v == "enc_cfg":
             return json.dumps(token_meta)
         return ""
 
-    with patch("src.api.handlers.base.request_builder.crypto_service.decrypt", side_effect=_decrypt):
+    with patch(
+        "src.api.handlers.base.request_builder.crypto_service.decrypt", side_effect=_decrypt
+    ):
         auth = await get_provider_auth(endpoint, key)  # type: ignore[arg-type]
 
     assert auth is not None
     assert auth.auth_header == "Authorization"
     assert auth.auth_value == "Bearer access-token"
     assert auth.decrypted_auth_config == token_meta
-