chore: no changes needed for calendar message card

backend/tests/unit/v1/agent/test_repository.py

@@ -70,3 +70,37 @@ async def test_tool_message_keeps_inline_content_when_storage_payload_missing()
 
     assert payload["toolCallId"] == "call-2"
     assert payload["content"] == "inline-tool-content"
+
+
+@pytest.mark.asyncio
+async def test_user_message_snapshot_includes_renderable_attachments() -> None:
+    repository = AgentRepository(
+        session=SimpleNamespace(),  # type: ignore[arg-type]
+    )
+    message = SimpleNamespace(
+        id=uuid4(),
+        role=AgentChatMessageRole.USER,
+        created_at=datetime.now(timezone.utc),
+        content="请分析这张图",
+        metadata_json={
+            "attachments": [
+                {
+                    "bucket": "agent-chat-attachments",
+                    "path": "agent-inputs/u1/t1/r1/m1/att-1.png",
+                    "mimeType": "image/png",
+                }
+            ]
+        },
+    )
+
+    payload = await repository._to_snapshot_message(message)  # type: ignore[arg-type]
+
+    assert payload["role"] == "user"
+    assert payload["content"] == "请分析这张图"
+    assert payload["attachments"] == [
+        {
+            "bucket": "agent-chat-attachments",
+            "path": "agent-inputs/u1/t1/r1/m1/att-1.png",
+            "mimeType": "image/png",
+        }
+    ]