feat: 预算按战略地图隔离(map_id) — 切换地图数据区分

问题: 预算数据无map_id, 两地图共用KPI时预算无法区分(切地图数据均显示)
修复:
- budget_plans 加 map_id 字段+索引
- list 支持 map_id 过滤(含NULL历史预算兼容迁移)
- create 收 map_id + 去重键含map_id(同KPI不同地图可各自预算)
- 前端: loadBudget/loadStrategyBudget 传 map_id, 保存带 map_id
- 端到端验证: 地图51 F_REVENUE 300(map_id=51) 地图51显示/地图32不显示 ✓
pytest 35+11 passed, 部署

backend/app/api/budget.py

@@ -3,7 +3,7 @@
 """
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.orm import Session
-from sqlalchemy import func
+from sqlalchemy import func, or_
 from typing import Optional
 from datetime import datetime
 
@@ -20,6 +20,7 @@ router = APIRouter(prefix="/api/cma/budget", tags=["预算管理"],
 @router.get("/plans")
 def list_budget_plans(
     kpi_id: Optional[int] = Query(None),
+    map_id: Optional[int] = Query(None, description="按战略地图过滤预算"),
     period: Optional[str] = Query(None),
     year: Optional[int] = Query(None),
     version: Optional[str] = Query(None),
@@ -32,6 +33,9 @@ def list_budget_plans(
         KPIDefinition, BudgetPlan.kpi_id == KPIDefinition.id
     ).filter(KPIDefinition.entity_id == entity_id)
 
+    if map_id:
+        # 按地图隔离: 显示该地图的预算 + 未绑定地图的历史预算(NULL, 兼容迁移)
+        query = query.filter(or_(BudgetPlan.map_id == map_id, BudgetPlan.map_id.is_(None)))
     if kpi_id:
         query = query.filter(BudgetPlan.kpi_id == kpi_id)
     if period:
@@ -51,6 +55,7 @@ def list_budget_plans(
         result.append({
             "id": p.id,
             "kpi_id": p.kpi_id,
+            "map_id": p.map_id,
             "kpi_code": kpi.kpi_code if kpi else "",
             "kpi_name": kpi.kpi_name if kpi else "",
             "dimension": kpi.dimension if kpi else "",
@@ -88,12 +93,14 @@ def create_budget_plan(
 
     year, month = period.split("-")
     version = data.get("version", "v1.0")
+    map_id = data.get("map_id")  # 预算归属地图（2026-08-27: 按地图隔离）
 
-    # 检查是否已有记录（去重）
+    # 检查是否已有记录（去重, 含map_id）
     existing = db.query(BudgetPlan).filter(
         BudgetPlan.kpi_id == kpi_id,
         BudgetPlan.period == period,
         BudgetPlan.version == version,
+        BudgetPlan.map_id == map_id,
         BudgetPlan.status == "active",
     ).first()
 
@@ -106,6 +113,7 @@ def create_budget_plan(
     else:
         plan = BudgetPlan(
             kpi_id=kpi_id,
+            map_id=map_id,
             period=period,
             budget_value=budget_value,
             budget_year=int(year),