feat: 我的页整合扫一扫/设置与提现、all-chapters去重、内容上传API、文档与后台登录

Co-authored-by: Cursor <cursoragent@cursor.com>

app/api/admin/logout/route.ts

@@ -0,0 +1,9 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getAdminCookieName, getAdminCookieOptions } from '@/lib/admin-auth'
+
+export async function POST(_req: NextRequest) {
+  const res = NextResponse.json({ success: true })
+  const opts = getAdminCookieOptions()
+  res.cookies.set(getAdminCookieName(), '', { ...opts, maxAge: 0 })
+  return res
+}