修复回忆录图片重试状态透传与前端展示

api/tests/test_chapters_router_images.py

@@ -2,6 +2,7 @@ import os
 import unittest
 from unittest.mock import Mock, patch
 
+from api.routers import chapters as chapters_module
 from api.routers.chapters import _chapter_to_dict
 
 
@@ -69,7 +70,9 @@ class ChaptersRouterImagesTest(unittest.TestCase):
     )
     def test_chapter_to_dict_preserves_completed_asset_when_signing_fails(self, storage_cls):
         storage = Mock()
-        storage.get_download_url.side_effect = RuntimeError("cos unavailable")
+        storage.get_download_url.side_effect = chapters_module.CosDownloadUrlError(
+            "cos unavailable", retryable=True, request_id="req-err"
+        )
         storage_cls.from_env.return_value = storage
 
         chapter = type(
@@ -102,11 +105,9 @@ class ChaptersRouterImagesTest(unittest.TestCase):
         payload = _chapter_to_dict(chapter)
 
         self.assertEqual(payload["images"][0]["status"], "completed")
-        self.assertEqual(
-            payload["images"][0]["url"],
-            "https://life-echo-dev-1319381411.cos.ap-shanghai.myqcloud.com/memoirs/u1/c1/0-demo.png",
-        )
+        self.assertIsNone(payload["images"][0]["url"])
         self.assertEqual(payload["images"][0]["prompt"], "A serene southern China town")
+        self.assertEqual(payload["images"][0]["error"], "image delivery unavailable")
         self.assertNotIn("storage_key", payload["images"][0])
 
     @patch("api.routers.chapters.TencentCosStorageService")
@@ -183,3 +184,40 @@ class ChaptersRouterImagesTest(unittest.TestCase):
 
         self.assertEqual(len(payload["images"]), 1)
         self.assertEqual(payload["images"][0]["status"], "completed")
+
+    @patch("api.routers.chapters.TencentCosStorageService")
+    @patch.dict(os.environ, {"MEMOIR_IMAGE_ENABLED": "true"}, clear=False)
+    def test_chapter_to_dict_preserves_retryable_flag_for_failed_assets(self, storage_cls):
+        storage_cls.from_env.return_value = Mock()
+
+        chapter = type(
+            "ChapterStub",
+            (),
+            {
+                "id": "chapter-1",
+                "title": "童年的夏天",
+                "content": "{{IMAGE:南方小镇的青石板路}}",
+                "order_index": 0,
+                "status": "completed",
+                "category": "childhood",
+                "images": [
+                    {
+                        "index": 0,
+                        "placeholder": "{{IMAGE:南方小镇的青石板路}}",
+                        "description": "南方小镇的青石板路",
+                        "status": "failed",
+                        "url": None,
+                        "error": "upload denied",
+                        "retryable": False,
+                    }
+                ],
+                "updated_at": None,
+                "is_new": False,
+                "source_segments": [],
+            },
+        )()
+
+        payload = _chapter_to_dict(chapter)
+
+        self.assertEqual(payload["images"][0]["status"], "failed")
+        self.assertFalse(payload["images"][0]["retryable"])