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/export.py

@@ -19,7 +19,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query, Response
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.api.deps import get_session
-from app.db.models import Customer, Message
+from app.db.models import Customer, CustomerAccountLink, Message
 
 router = APIRouter(prefix="/api/export", tags=["export"])
 
@@ -209,22 +209,40 @@ async def export_chat_html_zip(
             status_code=422, detail=f"一次最多导出 {ZIP_MAX_CONVS} 个会话"
         )
 
-    # 文件名显示名:批量取一次 Customer(备注 > 昵称 > friend_id)
-    cust_rows = (await session.execute(
+    # 文件名显示名:批量取一次(备注 > 昵称 > friend_id)。优先
+    # customer_account_link per-owner 快照——共享客户的档案行可能挂在别的
+    # 员工名下,按 owner 查档案会查空、zip 文件名回退成 wxid(2026-09-09,
+    # 同 sessions._meta 修复);link 没覆盖的回退档案。
+    link_rows = (await session.execute(
         sa.select(
-            Customer.friend_id,
-            Customer.friend_nickname,
-            Customer.friend_remark,
+            CustomerAccountLink.friend_id,
+            CustomerAccountLink.friend_nickname,
+            CustomerAccountLink.friend_remark,
         ).where(
-            Customer.channel == channel,
-            Customer.owner_account_id == owner_account_id,
-            Customer.friend_id.in_(ids),
+            CustomerAccountLink.channel == channel,
+            CustomerAccountLink.owner_account_id == owner_account_id,
+            CustomerAccountLink.friend_id.in_(ids),
         )
     )).all()
     names = {
         r.friend_id: (r.friend_remark or r.friend_nickname or r.friend_id)
-        for r in cust_rows
+        for r in link_rows
     }
+    missing = [t for t in ids if t not in names]
+    if missing:
+        cust_rows = (await session.execute(
+            sa.select(
+                Customer.friend_id,
+                Customer.friend_nickname,
+                Customer.friend_remark,
+            ).where(
+                Customer.channel == channel,
+                Customer.owner_account_id == owner_account_id,
+                Customer.friend_id.in_(missing),
+            )
+        )).all()
+        for r in cust_rows:
+            names[r.friend_id] = (r.friend_remark or r.friend_nickname or r.friend_id)
 
     buf = io.BytesIO()
     with zipfile.ZipFile(buf, "w", zipfile.ZIP_DEFLATED) as zf: