feat(export): 导出 HTML 媒体内嵌(图片/语音/视频/附件, OSS URL 直接嵌入)

Co-Authored-By: Claude <noreply@anthropic.com>

yunke-server/tests/test_api_export.py

@@ -25,6 +25,16 @@ async def _seed(session: AsyncSession) -> None:
         Message(msg_id="g2", channel="wechat", owner_account_id="wx_owner",
                 talker_id="room_topic", room_id="g1@chatroom", text="范围外",
                 timestamp=9999999, is_send=True, type="text", type_raw=1),
+        # 图文消息 — OSS URL 应直接嵌入 <img>
+        Message(msg_id="dm3", channel="wechat", owner_account_id="wx_owner",
+                talker_id="wx_friend", room_id=None, text=None,
+                timestamp=2500, is_send=False, type="image", type_raw=3,
+                file_url="https://oss.example.com/x/p1.jpg"),
+        # 本地 /api/media 路径 — 应显示 "[本地媒体]" 占位
+        Message(msg_id="dm4", channel="wechat", owner_account_id="wx_owner",
+                talker_id="wx_friend", room_id=None, text=None,
+                timestamp=2600, is_send=True, type="voice", type_raw=34,
+                file_url="/api/media/abc123", duration=8),
     ])
     await session.commit()
 
@@ -58,3 +68,18 @@ async def test_export_empty(make_client):
     assert r.status_code == 200
     assert r.headers["content-type"].startswith("text/html")
     assert "暂无消息" in r.text
+
+
+async def test_export_embeds_media(make_client):
+    """图片(OSS URL)直接 <img> 嵌入;本地 /api/ 路径显示 [本地媒体] 占位。"""
+    client = await make_client(_seed)
+    r = await client.get("/api/export/chat-html", params={
+        "channel": "wechat", "owner_account_id": "wx_owner", "talker_id": "wx_friend"})
+    assert r.status_code == 200
+    body = r.text
+    # OSS URL → <img> with the URL escaped into src
+    assert "<img" in body
+    assert "https://oss.example.com/x/p1.jpg" in body
+    # 本地路径 → 占位提示,不嵌 <audio>
+    assert "[本地媒体]" in body
+    assert "/api/media/abc123" not in body