fix(customers): WA客户破1万上限(逐员工uid过滤,8585→11931全量)+双渠道页脚云客口径+消息同步刷新最近沟通时间

- wa-friends 逐员工抓取:全局查询~1万行硬上限(云客11931只翻到10000),
  uid=员工WA号过滤(真机验证 declared 1145→1149),total-aware翻页
- declared-total 分渠道:Σ wechat/whatsapp_account.contacts_num(8590/11915)
- 消息增量同步顺带刷新 customer.last_chat_time(云客列表按最近沟通实时
  排序,快照每日一次导致顺序滞后;微信1:1+WA都加)

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

yunke-server/app/api/routers/customer.py

@@ -29,13 +29,16 @@ PageSizeParam = Annotated[int, Query(ge=1, le=100)]
 
 @router.get("/customers/declared-total")
 async def customers_declared_total(session: SessionDep) -> dict:
-    """云客口径的微信客户合计 = Σ wechat_account.contacts_num。
+    """云客口径的客户合计(分渠道)= Σ 员工账号表的 contacts_num 声明值。
 
     云客列表的页脚数字含 ES 索引重复条目(实测 csf 员工声明 1999 vs 真实
-    distinct 1449,连行 id 都相同的重复 doc,2026-08-20);本地表存去重真实
-    客户,此端点把「与云客页脚一字不差」的声明口径给前端展示。
+    distinct 1449,连行 id 都相同的重复 doc,2026-08-20;WA 同理 11931 vs
+    8674);本地表存去重真实客户,此端点把「与云客页脚一字不差」的声明口径
+    给前端展示。
     """
-    row = (
+    from app.db.models import WhatsappAccount
+
+    wechat = (
         await session.execute(
             sa.select(
                 sa.func.coalesce(sa.func.sum(WechatAccount.contacts_num), 0),
@@ -43,9 +46,17 @@ async def customers_declared_total(session: SessionDep) -> dict:
             )
         )
     ).one()
+    whatsapp = (
+        await session.execute(
+            sa.select(
+                sa.func.coalesce(sa.func.sum(WhatsappAccount.contacts_num), 0),
+                sa.func.count(WhatsappAccount.contacts_num),
+            )
+        )
+    ).one()
     return {
-        "declared_total": int(row[0]),
-        "account_count": int(row[1]),
+        "wechat": {"declared_total": int(wechat[0]), "account_count": int(wechat[1])},
+        "whatsapp": {"declared_total": int(whatsapp[0]), "account_count": int(whatsapp[1])},
     }