fix(操作统计): 返回全部人员而非仅有操作的人

- get_user_operations 先取全部 IRIS 人员清单，再合并各自操作次数
- 无操作的显示 0，避免只看得到当前有操作记录的人(如只看自己)

backend/app/services/dashboard_service.py

@@ -483,7 +483,10 @@ async def get_user_operations(
     since: datetime | None = None,
     until: datetime | None = None,
 ) -> list[UserOperation]:
-    """上帝视角 — 统计每个人员的操作次数（按时段过滤 task_logs）。
+    """上帝视角 — 统计**全部人员**的操作次数（按时段过滤 task_logs）。
+
+    返回所有 IRIS 部门人员（该时段无操作的计 0），并追加有操作记录但不在
+    人员清单中的账号（如历史/已离职）。
 
     操作口径：
       - 接收: action_type='receive'
@@ -491,11 +494,13 @@ async def get_user_operations(
       - 上传备注: action_type='record'（工人手动追加的进度记录）
     """
     from app.models.task_log import TaskLog
+    from app.core.mom_database import MomSessionLocal
+    from sqlalchemy import text
 
+    # ── 1. 统计 task_logs 操作次数（按 operator_id 聚合）──
     rcv = func.count().filter(TaskLog.action_type == "receive")
     cpl = func.count().filter(TaskLog.action_type == "complete")
     rcd = func.count().filter(TaskLog.action_type == "record")
-    total_expr = rcv + cpl + rcd
 
     stmt = (
         select(TaskLog.operator_id, rcv.label("receive"), cpl.label("complete"), rcd.label("record"))
@@ -504,7 +509,6 @@ async def get_user_operations(
             TaskLog.operator_id.isnot(None),
         )
         .group_by(TaskLog.operator_id)
-        .order_by(total_expr.desc())
     )
     if since:
         stmt = stmt.where(TaskLog.created_at >= since)
@@ -512,27 +516,54 @@ async def get_user_operations(
         stmt = stmt.where(TaskLog.created_at <= until)
 
     result = await db.execute(stmt)
-    rows = result.all()
+    op_map = {r[0]: (r[1] or 0, r[2] or 0, r[3] or 0) for r in result.all()}
 
-    ids = [r[0] for r in rows if r[0]]
-    name_map: dict[str, str] = {}
-    if ids:
-        from app.services.mom_cache import get_display_names
-        name_map = get_display_names(ids)
+    # ── 2. 获取全部 MOM 用户清单（IRIS 部门）──
+    users: list[dict] = []
+    try:
+        dbm = MomSessionLocal()
+        try:
+            rows = dbm.execute(text("""
+                SELECT username, SPLIT_PART(username, '/', 1) AS full_name
+                FROM sys_user WHERE department = 'IRIS'
+            """)).fetchall()
+        except Exception:
+            rows = dbm.execute(text("""
+                SELECT username, SPLIT_PART(username, '/', 1) AS full_name
+                FROM sys_user
+            """)).fetchall()
+        finally:
+            dbm.close()
+        for row in rows:
+            short = row.username.split("/")[-1] if "/" in row.username else row.username
+            users.append({"username": short, "full_name": row.full_name or short})
+    except Exception:
+        users = []
 
+    # ── 3. 合并：所有人员 + 有操作但不在清单的账号 ──
+    merged: dict[str, dict] = {}
+    for u in users:
+        merged[u["username"]] = {"name": u["full_name"], "rcv": 0, "cpl": 0, "rcd": 0}
+    for uid, (r, c, rd) in op_map.items():
+        if uid in merged:
+            merged[uid]["rcv"] = r
+            merged[uid]["cpl"] = c
+            merged[uid]["rcd"] = rd
+        else:
+            merged[uid] = {"name": uid, "rcv": r, "cpl": c, "rcd": rd}
+
+    # ── 4. 组装 + 排序（总次数降序，无操作的排在最后）──
     items: list[UserOperation] = []
-    for row in rows:
-        receive = row[1] or 0
-        transfer = row[2] or 0
-        record = row[3] or 0
+    for uid, v in merged.items():
         items.append(UserOperation(
-            user_id=row[0],
-            user_name=name_map.get(row[0], row[0]),
-            receive_count=receive,
-            transfer_count=transfer,
-            record_count=record,
-            total=receive + transfer + record,
+            user_id=uid,
+            user_name=v["name"],
+            receive_count=v["rcv"],
+            transfer_count=v["cpl"],
+            record_count=v["rcd"],
+            total=v["rcv"] + v["cpl"] + v["rcd"],
         ))
+    items.sort(key=lambda x: x.total, reverse=True)
     return items