refactor(backend): 仓储层散参数收敛为查询 DTO

仓储层的 list_*/count_* 此前以 keyword/status/offset/limit 四五个散参数
传参，调用点重复铺开、易漏传且不可扩展；按项目「参数 >4 封装 DTO」的
约定统一收敛为各模块的 Query 对象（如 RoleQuery、BusinessQuery），
服务层与测试调用同步调整，行为不变。

- repositories 层查询方法签名改为 (session, query)，分页与筛选条件
  由 Query 承载，_apply_filters 同步收口
- schemas 层补齐各模块 Query 模型（approval/business_role/report 等）
- services 层调用点同步改为传 Query
- tests 随之调整；新增用例：待办角色流转（财务通过后领导出现待办）、
  参数预览顺序稳定

验证：全量 pytest 900 passed（11:08）；单元 526 passed；ruff check 绿。

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

backend/app/services/report_export.py

@@ -36,7 +36,6 @@ _DATE_FORMAT = "YYYY-MM-DD"
 _FORMULA_PREFIXES = ("=", "+", "-", "@", "\t")
 
 
-
 @dataclass(frozen=True, slots=True)
 class _Column:
     """列定义：key 取行 dict 字段，kind 决定单元格类型与格式。"""
@@ -403,7 +402,13 @@ def _write_department_document(
     company_share_count = int(company.get("company_share_count") or 0)
 
     _write_document_header(
-        sheet, len(_DEPARTMENT_WIDTHS), company_name, title, filters, template_version, operator_name
+        sheet,
+        len(_DEPARTMENT_WIDTHS),
+        company_name,
+        title,
+        filters,
+        template_version,
+        operator_name,
     )
 
     _write_block(
@@ -439,16 +444,12 @@ def _write_department_document(
                 "manager_name": "合计",
                 "member_count": sum(team["member_count"] for team in teams),
                 "team_base": _sum_amount(team["team_base"] for team in teams),
-                "team_share_amount": _sum_amount(
-                    team["team_share_amount"] for team in teams
-                ),
+                "team_share_amount": _sum_amount(team["team_share_amount"] for team in teams),
                 "team_subtotal": _sum_amount(team["team_subtotal"] for team in teams),
                 # 未生成月结时全部为 None，合计也留空（不能显示 0.00 误导）
                 "frozen_amount": (
                     _sum_amount(
-                        team["frozen_amount"]
-                        for team in teams
-                        if team["frozen_amount"] is not None
+                        team["frozen_amount"] for team in teams if team["frozen_amount"] is not None
                     )
                     if any(team["frozen_amount"] is not None for team in teams)
                     else None