fix(names): 会话/统计弹窗/zip 文件名的共享好友昵称读 link 快照

用户报 Lily 聊天窗口「聊天好友」列表里 A**郑 显示成 wxid_ir6uxy2li8no22
——A**郑是 14 个员工共享的客户,档案行(customer 全局单行 last-wins)挂在
别的员工名下,按 owner 查档案查空,三个显示位回退 wxid:

- sessions._meta(会话列表名字/头像/delete_flag)
- staff_chat_stats._customer_names(五数字弹窗明细)
- chat-html-zip 文件名

统一改为优先 customer_account_link per-owner 快照(link 未覆盖回退档案,
空表过渡安全)。staff_stats(统计分析新客户等)仍是档案口径,属分析语义
另行评估。613 测试绿(新增会话共享好友昵称 2 例)。

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

yunke-server/tests/test_api_sessions.py

@@ -5,7 +5,7 @@ import time
 
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from app.db.models import ChatGroup, Customer, Message
+from app.db.models import ChatGroup, Customer, CustomerAccountLink, Message
 
 OWNER = "wx_owner_s"
 CH = "wechat"
@@ -45,6 +45,40 @@ async def test_sessions_friend_and_group(make_client):
     assert g["name"] == "群一号" and g["today_count"] == 1
 
 
+async def test_sessions_shared_friend_name_from_link(make_client):
+    """共享好友昵称读 link 快照(2026-09-09):档案行挂在别的员工名下时,
+    会话列表此前回退显示 wxid;link 表每账号一行,回填后都有昵称。
+    """
+
+    async def seed(session: AsyncSession) -> None:
+        session.add_all([
+            # OWNER 与共享好友 t_shared 有会话
+            Message(msg_id="sh1", channel=CH, owner_account_id=OWNER, talker_id="t_shared",
+                    room_id=None, is_send=True, timestamp=_NOW, type="text", type_raw=1, text="x"),
+            # 档案行(last-wins)挂在别的员工名下——按 owner 查档案必然查空
+            Customer(friend_id="t_shared", channel=CH,
+                     owner_account_id="wx_other", friend_nickname="A**郑"),
+            # OWNER 名下的 per-owner link 快照
+            CustomerAccountLink(channel=CH, owner_account_id=OWNER, friend_id="t_shared",
+                                friend_nickname="A**郑", friend_remark=None),
+        ])
+        await session.commit()
+
+    client = await make_client(seed)
+    r = await client.get("/api/sessions", params={"owner_account_id": OWNER, "channel": CH})
+    assert r.status_code == 200
+    by = {s.get("talker_id"): s for s in r.json()["sessions"]}
+    assert by["t_shared"]["name"] == "A**郑"
+
+
+async def test_sessions_name_falls_back_to_archive_without_link(make_client):
+    """link 未覆盖的好友回退档案路径(空表过渡安全)。"""
+    client = await make_client(_seed)
+    r = await client.get("/api/sessions", params={"owner_account_id": OWNER, "channel": CH})
+    by = {s.get("talker_id"): s for s in r.json()["sessions"]}
+    assert by["t1"]["name"] == "Alice"  # 档案行在 OWNER 名下
+
+
 async def test_sessions_sorted_by_last_chat_time_desc(make_client):
     client = await make_client(_seed)
     body = (await client.get("/api/sessions", params={"owner_account_id": OWNER})).json()