feat: 账套模式全量接入 — 12个API entity_id统一走token解析链 + 前端登录选公司/切换器重签token

- 后端: kpis/bsc_layers/cash/predict/growth_quality/tax_compliance/data 的 entity_id 参数统一改为 Depends(get_entity_id)
- 前端: 拦截器删除自动附加X-Entity-Id/entity_id; 登录页公司选择器(按用户名授权过滤); 切换器改POST /auth/switch-entity重新签发token+整页刷新; ReportCenter同步改造
- 修复前后端不匹配: login-entities路由→/auth/entities; login响应entity_id取user.entity_id

backend/app/api/growth_quality.py

@@ -11,6 +11,7 @@ from datetime import datetime
 import re
 
 from app.database import get_db
+from app.deps import get_entity_id
 from app.auth_middleware import require_auth, require_role
 from app.models import KPIDefinition, KPIValue, Entity
 
@@ -453,7 +454,7 @@ def _diagnose(db: Session, entity_id: int, period: str, history: List[dict]):
 
 
 @router.get("/periods")
-def list_periods(entity_id: int = Query(1), db: Session = Depends(get_db)):
+def list_periods(entity_id: int = Depends(get_entity_id), db: Session = Depends(get_db)):
     """列出某实体有KPI数据的期间（按月，含数据覆盖度，用于前端默认期间选择）"""
     rows = (db.query(KPIValue.period, KPIValue.kpi_id)
             .join(KPIDefinition, KPIDefinition.id == KPIValue.kpi_id)
@@ -470,7 +471,7 @@ def list_periods(entity_id: int = Query(1), db: Session = Depends(get_db)):
 
 @router.get("/diagnosis")
 def growth_quality_diagnosis(
-    entity_id: int = Query(1, ge=1),
+    entity_id: int = Depends(get_entity_id),
     period: Optional[str] = Query(None, description="期间 YYYY-MM，默认最近有数据期间"),
     db: Session = Depends(get_db),
 ):