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/app/api/routers/sessions.py

@@ -22,7 +22,13 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.api.deps import get_session
 from app.api.schemas import SessionListOut, SessionOut
-from app.db.models import ChatGroup, Customer, Message, MsgDailyStats
+from app.db.models import (
+    ChatGroup,
+    Customer,
+    CustomerAccountLink,
+    Message,
+    MsgDailyStats,
+)
 from app.storage.summary import day_key, has_rows as _summary_has_rows
 
 router = APIRouter(prefix="/api", tags=["sessions"])
@@ -117,7 +123,13 @@ async def _summary_rows(
 
 
 async def _meta(session: AsyncSession, owner: str, channel: str, friend_ids: list[str], room_ids: list[str]):
-    """查 customer/chat_group 表合并昵称/头像;好友行额外带 delete_flag(is_del 过滤用)。
+    """查 customer_account_link(主)/customer(兜底)/chat_group 合并昵称/头像。
+
+    好友名优先读 ``customer_account_link`` 的 per-owner 快照——共享客户的
+    档案行(customer 全局单行,last-wins)可能挂在别的员工名下,按 owner 查
+    档案会查空,会话列表就回退显示 wxid(2026-09-09 用户报「有昵称却显示
+    微信号」);link 表每账号一行,回填后都有昵称。link 没覆盖的(空表过渡/
+    老数据)回退档案路径。
 
     friends 值为 ``(name, avatar, delete_flag)``;群无删除标记,groups 值仍为
     ``(name, avatar)``。
@@ -126,12 +138,29 @@ async def _meta(session: AsyncSession, owner: str, channel: str, friend_ids: lis
     if friend_ids:
         for fid, remark, nick, real, avatar, delete_flag in (await session.execute(
             sa.select(
-                Customer.friend_id, Customer.friend_remark, Customer.friend_nickname,
-                Customer.real_name, Customer.head_image_url, Customer.delete_flag,
+                CustomerAccountLink.friend_id, CustomerAccountLink.friend_remark,
+                CustomerAccountLink.friend_nickname, CustomerAccountLink.real_name,
+                CustomerAccountLink.head_image_url, CustomerAccountLink.delete_flag,
+            )
+            .where(
+                CustomerAccountLink.channel == channel,
+                CustomerAccountLink.owner_account_id == owner,
+                CustomerAccountLink.friend_id.in_(friend_ids),
             )
-            .where(Customer.channel == channel, Customer.owner_account_id == owner, Customer.friend_id.in_(friend_ids))
         )).all():
             friends[fid] = (remark or nick or real or fid, avatar, delete_flag)
+        # link 未覆盖的好友回退档案(按 owner 过滤;共享好友在此仍可能查空,
+        # 上层以 wxid 兜底显示)
+        missing = [fid for fid in friend_ids if fid not in friends]
+        if missing:
+            for fid, remark, nick, real, avatar, delete_flag in (await session.execute(
+                sa.select(
+                    Customer.friend_id, Customer.friend_remark, Customer.friend_nickname,
+                    Customer.real_name, Customer.head_image_url, Customer.delete_flag,
+                )
+                .where(Customer.channel == channel, Customer.owner_account_id == owner, Customer.friend_id.in_(missing))
+            )).all():
+                friends[fid] = (remark or nick or real or fid, avatar, delete_flag)
     groups: dict[str, tuple[str, str | None]] = {}
     if room_ids:
         for rid, name, avatar in (await session.execute(