fix: 统一AI生成失败提示

core/backend/apps/projects/tests.py

@@ -299,8 +299,8 @@ class ProjectApiTests(TestCase):
         # 没二次预扣额度(复用直接 return,根本没走到 create_ai_task)
         self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.RESERVE).count(), 0)
 
-    def test_extract_status_reports_running_then_failure(self):
-        """extract-status:在途→running=True;失败→running=False 且把可读错误透给前端(刷新后也能看到失败原因)。"""
+    def test_extract_status_reports_running_then_safe_failure(self):
+        """extract-status:在途→running=True;失败→安全错误对象，原始任务错误不透给前端。"""
         project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P4")
         t = AITask.objects.create(
             team=self.team, created_by=self.user, project=project, model_config=self.model,
@@ -317,7 +317,8 @@ class ProjectApiTests(TestCase):
         res = self.client.get(f"/api/projects/{project.id}/extract-status/")
         self.assertFalse(res.data["running"])
         self.assertEqual(res.data["status"], "failed")
-        self.assertIn("未返回有效 JSON", res.data["error"])
+        self.assertEqual(res.data["error"]["code"], "unknown")
+        self.assertNotIn("有效 JSON", res.data["error_message"])
 
     @patch("apps.ai.services._store_generated_media")
     @patch("apps.ai.services.get_image_provider")
@@ -811,7 +812,8 @@ class ProjectApiTests(TestCase):
             format="json",
         )
         self.assertEqual(response.status_code, 400)
-        self.assertIn("语音合成未配置", response.json()["detail"])
+        self.assertEqual(response.json()["error"]["code"], "provider_config_error")
+        self.assertIn("配音暂时不可用", response.json()["detail"])
         self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 0)
 
     def test_export_command_mixes_voiceover_above_bgm(self):