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/ai_coaching.py

@@ -0,0 +1,45 @@
+"""
+AI 教练引擎路由 —— /api/ai-coaching
+Dify 回调 + SSE 通知流
+"""
+from __future__ import annotations
+import uuid
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import StreamingResponse
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.api.deps import get_current_user
+from app.db.database import get_db
+from app.schemas.auth import CurrentUserPayload
+from app.schemas.response import ok
+from app.services import ai_coaching_service as svc
+
+router = APIRouter(prefix="/ai-coaching", tags=["AI教练引擎"])
+
+
+@router.post("/dify-callback/{sales_log_id}", summary="Dify Workflow 回调端点")
+async def dify_coaching_callback(
+    sales_log_id: uuid.UUID,
+    request: Request,
+    db: AsyncSession = Depends(get_db),
+) -> dict:
+    """接收 Dify Workflow 的异步回调，写回教练反馈"""
+    import json
+    body = await request.json()
+    await svc.handle_dify_coaching_callback(db, sales_log_id, body)
+    return ok(message="教练反馈已回写")
+
+
+@router.get("/notifications/stream", summary="SSE 通知流")
+async def sse_notifications(
+    current_user: CurrentUserPayload = Depends(get_current_user),
+):
+    """Server-Sent Events 推送通知（AI 教练反馈、系统通知等）"""
+    return StreamingResponse(
+        svc.sse_notification_generator(current_user.user_id),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+        },
+    )