feat: v0.3 报价算料引擎与仓库库存模块

后端:
- 报价算料: 从drawing_data几何提取型材清单(外框/中梃/扇框投影长度)
  与玻璃面积(鞋带公式), 套价格本计价, 支持样板/订单/自定义图纸三入口
- 仓库库存: 材料CRUD/出入库/流水/负库存拦截/预警线
- SQLite默认路径锚定项目根目录(修复cwd依赖)
前端:
- 仓库库存页(筛选/出入库对话框/预警高亮)
- 算料报价弹窗(样板库与订单详情入口, 支持打印)
- 路由与导航更新(8页面)
回归: 9个API端点全部200, 报价/优化/SPA路由验证通过

src/huamenchuang/api/router.py

@@ -1,7 +1,16 @@
 """路由汇总。"""
 from fastapi import APIRouter
 
-from huamenchuang.api import auth, contracts, customers, optimize, orders, windoor
+from huamenchuang.api import (
+    auth,
+    contracts,
+    customers,
+    optimize,
+    orders,
+    quote,
+    warehouse,
+    windoor,
+)
 
 api_router = APIRouter(prefix="/api")
 api_router.include_router(auth.router)
@@ -10,3 +19,5 @@ api_router.include_router(customers.router)
 api_router.include_router(contracts.router)
 api_router.include_router(windoor.router)
 api_router.include_router(optimize.router)
+api_router.include_router(quote.router)
+api_router.include_router(warehouse.router)