feat: 波士顿产品矩阵 — 四象限分析(明星/现金牛/问题/瘦狗)

- 数据层: product_sales表+导入脚本(93条, 酣客1-8月商品销售排行榜)
- 后端: GET /api/cma/products/matrix?entity_id&months
  横轴=销售趋势(线性回归), 纵轴=加权毛利率, 气泡=销售额
- 前端: ProductMatrix.vue ECharts散点图+象限卡片+明细表, 支持酣客/博海切换
- 验证: API四象限分类正确, 数据联动, 前端路由200, 全部通过

backend/app/main.py

@@ -5,7 +5,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse
 from dotenv import load_dotenv
 from app.database import init_db
-from app.api import auth, kpis, kpi_governance, templates, maps, dashboard, data, alerts, ai_analysis, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, bot_bridge_v2, 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
+from app.api import auth, kpis, kpi_governance, templates, maps, dashboard, data, alerts, ai_analysis, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, bot_bridge_v2, 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
 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
@@ -53,6 +53,7 @@ app.include_router(budget.router)
 app.include_router(cost.router)
 app.include_router(predict.router)
 app.include_router(growth_quality.router)
+app.include_router(products.router)
 app.include_router(reports.router)
 app.include_router(security.router)
 app.include_router(knowledge.router)