fix: drop next.config /login → /client-login redirect

next.config redirects fire before middleware/page.tsx, so /login still
307'd to /client-login (which bounces to distribute). Removing the
config rule lets src/app/login/page.tsx serve a real BB-direct sign-in
form for admin access.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

next.config.mjs

@@ -124,12 +124,8 @@ const nextConfig = {
         destination: '/client-login',
         permanent: true,
       },
-      // Login alias — /login redirects to canonical /client-login
-      {
-        source: '/login',
-        destination: '/client-login',
-        permanent: false,
-      },
+      // /login is a real BB-direct sign-in page (used by admin backend).
+      // Do NOT redirect it to /client-login anymore.
     ];
   }
 };