feat(strategy-map): A3 三维切片（时间/门店/产品）——切片重算 + 显式空态 + entity 隔离

- 新增 /api/cma/maps/{id}/dimension-options 与 /{id}/slice（只读）
- 时间：kpi_values.period 月/季/年；flow 求和、ratio 均值、balance/status 取最新
- 产品：product_sales + 逐月源一致性闸门（偏差>1% 不切片）
- 门店：库内无门店级事实 ⇒ available=false + reason，绝不回退总额
- 前端 MapDimensionFilter 挂到 MapCanvas，切换即 emit 切片，清除恢复 /review

backend/app/main.py

@@ -7,7 +7,7 @@ from fastapi.responses import JSONResponse
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from dotenv import load_dotenv
 from app.database import init_db, get_db
-from app.api import auth, kpis, kpi_governance, templates, maps, dashboard, data, alerts, ai_analysis, ai_suggestions, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, bot_bridge_v2, bot_suggestions, lead, tenant, customer_dashboard, deviation_push, budget_generate, knowledge_articles, kpi_causality, data_quality, bi_reports, entities, bsc_layers, okr, okr_templates, subjects, driver_budget, bot_kpis, ontology, bot_iron_law, analysis_results, expenses, cash, tax_compliance, verify, growth_quality, products, data_classification, value_sources, zero_based, derivation_rules, cash_classify, cashflow_structure, cash_vouchers_json, ext_input_ledgers, treasury, doc_center
+from app.api import auth, kpis, kpi_governance, templates, maps, dashboard, data, alerts, ai_analysis, ai_suggestions, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, bot_bridge_v2, bot_suggestions, lead, tenant, customer_dashboard, deviation_push, budget_generate, knowledge_articles, kpi_causality, data_quality, bi_reports, entities, bsc_layers, okr, okr_templates, subjects, driver_budget, bot_kpis, ontology, bot_iron_law, analysis_results, expenses, cash, tax_compliance, verify, growth_quality, products, data_classification, value_sources, zero_based, derivation_rules, cash_classify, cashflow_structure, cash_vouchers_json, ext_input_ledgers, treasury, doc_center, map_dimensions
 from app.utils.cache import clear_all as clear_cache, delete as delete_cache
 from scripts.erp_sync import run_sync as run_erp_sync
 from app.auth_middleware import require_auth, require_auth_401
@@ -67,6 +67,7 @@ app.include_router(cashflow_structure.compat_router)
 app.include_router(cost.router)
 app.include_router(predict.router)
 app.include_router(growth_quality.router)
+app.include_router(map_dimensions.router)
 app.include_router(products.router)
 app.include_router(reports.router)
 app.include_router(security.router)