v0.2.0: CRM/ERP 系统升级 - 清理 .gitignore 并移除误提交的 venv/env/db 文件

- 更新 .gitignore：全面覆盖环境变量、数据库、日志、缓存、上传文件
- 移除误跟踪的 server/venv/、crm_data.db、.env 文件
- 新增 server/.env.example 模板
- 新增合同管理、利润核算、AI教练等功能模块
- 新增 Playwright e2e 测试套件
- 前后端多项功能升级和 bug 修复

server/app/api/profit.py

@@ -0,0 +1,37 @@
+"""
+利润核算路由 —— /api/profit
+"""
+from __future__ import annotations
+import uuid
+from fastapi import APIRouter, Depends, Query
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.api.deps import get_current_user, get_current_company_id
+from app.db.database import get_db
+from app.schemas.auth import CurrentUserPayload
+from app.schemas.response import ok
+from app.services import profit_service as svc
+
+router = APIRouter(prefix="/profit", tags=["利润核算"])
+
+
+@router.get("/report", summary="利润报表（订单维度）")
+async def profit_report(
+    start_date: str | None = Query(None, description="起始日期 YYYY-MM-DD"),
+    end_date: str | None = Query(None, description="结束日期 YYYY-MM-DD"),
+    db: AsyncSession = Depends(get_db),
+    current_user: CurrentUserPayload = Depends(get_current_user),
+    company_id: uuid.UUID = Depends(get_current_company_id),
+) -> dict:
+    result = await svc.get_profit_report(db, company_id, start_date, end_date)
+    return ok(data=result)
+
+
+@router.post("/snapshot/{order_id}", summary="为订单锚定成本快照")
+async def snapshot_costs(
+    order_id: uuid.UUID,
+    db: AsyncSession = Depends(get_db),
+    current_user: CurrentUserPayload = Depends(get_current_user),
+    company_id: uuid.UUID = Depends(get_current_company_id),
+) -> dict:
+    result = await svc.snapshot_order_item_costs(db, order_id, company_id)
+    return ok(data=result, message=f"已为 {len(result)} 项明细锚定成本")