feat(link): customer_account_link 账号↔客户多对多——共享好友员工维度对齐云客

用户报「Lily 好友数 36,点进员工客户页只有 12」。真机探明根因:那 24 个
是共享客户(同一人加多个员工),云客 per-employee 各算一个;而 customer
表 PK=friend_id 全局单行、归属 last-wins,其他员工名下必然「消失」。
抓取器本身每员工都拿全了(日志 declared=36 rows=36),丢在入库模型层。

- 新表 customer_account_link(渠道×账号×客户一行,per-relation 快照:
  昵称/备注/头像/手机号/收发计数/最近沟通/add_time/fromType/isDel)
- 写:repos.upsert_customer 随档案同事务维护(所有好友抓取路径一处挂全);
  新增 prune_customer_links 对账
- 读:/api/customers?owner_account_id= 改读 link(与云客 contacts_num 口径
  一致);该账号 link 为空时回退档案路径(过渡安全);与 dept/user 等
  过滤组合时维持旧行为;CustomerOut 透传 from_type
- 抓取器:friends/wa-friends 逐员工整批 upsert 后按名单对账(取满声明
  total 才删,防半份名单误删)
- 前端:StaffFriends 数据来源列优先 link 的 from_type

611 测试绿(link 新 6 例);本地验证空表回退/造数接管/from_type 透传。
上线后需重跑 friends+wa-friends 回填 link(存量关系无法从档案反推)。

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

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

@@ -7,6 +7,12 @@ Read-only query over the mirrored ``customer`` table. Supports filtering by
 nickname / remark / friend_id / phone, ``%``/``_`` escaped as literals — the
 通讯录 search box). Results are ordered by ``last_chat_time desc`` (nulls
 last) then ``friend_id`` so the most-recently-active contacts surface first.
+
+**owner_account_id 维度走 ``customer_account_link``**(2026-09-08):customer
+档案 PK=friend_id 全局单行、归属 last-wins,共享客户在其他员工名下会漏
+(实测 36 vs 12);link 表每个「渠道×账号×客户」一行,员工维度列表/计数与
+云客 per-employee 口径一致。带 department/user/add_time/last_chat 等其余
+过滤时回退档案路径(组合场景罕见,保持旧行为)。
 """
 
 from __future__ import annotations
@@ -19,7 +25,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.api.deps import get_session
 from app.api.schemas import CustomerOut, Page
-from app.db.models import Customer, Staff, WechatAccount
+from app.db.models import Customer, CustomerAccountLink, Staff, WechatAccount
 
 router = APIRouter(prefix="/api", tags=["customers"])
 
@@ -61,6 +67,63 @@ async def customers_declared_total(session: SessionDep) -> dict:
     }
 
 
+async def _list_owner_links(
+    session: AsyncSession,
+    *,
+    page: int,
+    page_size: int,
+    channel: str | None,
+    owner_account_id: str,
+    friend_id: str | None,
+    q: str | None,
+) -> Page[CustomerOut]:
+    """员工维度客户列表:读 ``customer_account_link``(渠道×账号×客户一行)。
+
+    排序/搜索语义与档案路径一致(last_chat_time desc、四列模糊);link 自带
+    per-relation 快照(备注/收发计数按员工各一份,与云客 per-employee 列表
+    相同)。CustomerOut 的档案专属列(raw_json/version/send_today 等)为 None。
+    """
+    conditions = [CustomerAccountLink.owner_account_id == owner_account_id]
+    if channel is not None:
+        conditions.append(CustomerAccountLink.channel == channel)
+    if friend_id is not None:
+        conditions.append(CustomerAccountLink.friend_id == friend_id)
+    if q:
+        # LIKE 通配符转义(同档案路径):昵称/备注/微信号/手机号四列任一命中
+        escaped = q.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
+        like = f"%{escaped}%"
+        conditions.append(
+            sa.or_(
+                CustomerAccountLink.friend_nickname.like(like, escape="\\"),
+                CustomerAccountLink.friend_remark.like(like, escape="\\"),
+                CustomerAccountLink.friend_id.like(like, escape="\\"),
+                CustomerAccountLink.phone.like(like, escape="\\"),
+            )
+        )
+
+    total = (
+        await session.execute(
+            sa.select(sa.func.count())
+            .select_from(CustomerAccountLink)
+            .where(*conditions)
+        )
+    ).scalar_one()
+    rows = (
+        await session.execute(
+            sa.select(CustomerAccountLink)
+            .where(*conditions)
+            .order_by(
+                sa.nullslast(CustomerAccountLink.last_chat_time.desc()),
+                CustomerAccountLink.friend_id.asc(),
+            )
+            .limit(page_size)
+            .offset((page - 1) * page_size)
+        )
+    ).scalars().all()
+    items = [CustomerOut.model_validate(r) for r in rows]
+    return Page(items=items, total=total, page=page, page_size=page_size)
+
+
 @router.get("/customers")
 async def list_customers(
     session: SessionDep,
@@ -76,6 +139,34 @@ async def list_customers(
     q: Annotated[str | None, Query()] = None,
 ) -> Page[CustomerOut]:
     """List customers with optional filters and pagination."""
+    # 员工维度优先走 link 表(共享好友每账号一行,见模块 docstring);该账号
+    # link 还无数据时回退档案路径(过渡安全:回填前页面不至于空;也兼容
+    # 只写档案的理论路径)。与其余仅档案路径支持的过滤组合时同样回退。
+    if (
+        owner_account_id is not None
+        and department_id is None
+        and user_id is None
+        and add_time_since is None
+        and last_chat_since is None
+    ):
+        link_exists = (
+            await session.execute(
+                sa.select(sa.func.count())
+                .select_from(CustomerAccountLink)
+                .where(CustomerAccountLink.owner_account_id == owner_account_id)
+            )
+        ).scalar_one()
+        if link_exists:
+            return await _list_owner_links(
+                session,
+                page=page,
+                page_size=page_size,
+                channel=channel,
+                owner_account_id=owner_account_id,
+                friend_id=friend_id,
+                q=q,
+            )
+
     conditions = []
     if channel is not None:
         conditions.append(Customer.channel == channel)