rebuild(llm): add audited model connectivity tests

next/backend/features/accounts/routes.py

@@ -35,9 +35,12 @@ from backend.features.accounts.schemas import (
     ModelInput,
     ModelPoolItemResponse,
     ModelSelectionInput,
+    ModelTestResponse,
     ModelUpdateInput,
     PasswordChangeInput,
 )
+from backend.http.errors import AppError
+from backend.llm.gateway import LLMGatewayError
 
 router = APIRouter()
 
@@ -312,3 +315,16 @@ def delete_model(
 ) -> MessageResponse:
     request.app.state.container.model_pool.delete(model_id)
     return MessageResponse(message="模型已删除。")
+
+
+@router.post("/admin/models/{model_id}/test", response_model=ModelTestResponse)
+def test_model(
+    request: Request,
+    model_id: Annotated[int, Path(ge=1)],
+    principal: AdminWritePrincipal,
+) -> dict[str, object]:
+    try:
+        return request.app.state.container.llm.test_model(principal, model_id)
+    except LLMGatewayError as exc:
+        status = 404 if exc.code == "model_not_found" else 503
+        raise AppError(exc.code, str(exc), status) from exc