feat(cps): 加微信网页授权域名校验文件端点(MP_verify)

coupon.shaguabijia.com 全反代 app-server,微信请求该域名根目录 MP_verify_xxx.txt
验证域名归属(放根目录)。为微信网页授权(落地页拿 openid)接入做准备。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/api/v1/cps_redirect.py

@@ -10,7 +10,7 @@ import html
 import json
 
 from fastapi import APIRouter, Depends, Request
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, PlainTextResponse, RedirectResponse
 from sqlalchemy.orm import Session
 
 from app.core import media
@@ -45,6 +45,14 @@ def _record(db: Session, link: CpsLink, request: Request, event_type: str) -> No
         pass  # 记点击失败不阻断
 
 
+@router.get("/MP_verify_F7wnRQ7xPbhVOWC8.txt", include_in_schema=False)
+def wx_mp_domain_verify() -> PlainTextResponse:
+    """微信「网页授权域名」归属校验文件。coupon.shaguabijia.com 全反代 app-server,
+    微信请求 coupon.shaguabijia.com/MP_verify_xxx.txt 验证域名归属;内容=文件名核心串。
+    放域名根目录(本端点即根路径),为微信网页授权(拿 openid)接入做准备。"""
+    return PlainTextResponse("F7wnRQ7xPbhVOWC8")
+
+
 @router.get("/c/{code}", summary="群发短链落地(记点击 + 跳转/淘宝落地页)")
 def cps_landing(code: str, request: Request, db: Session = Depends(get_db)):
     link = cps_link_repo.get_by_code(db, code)