core: fix login redirect

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.2.10",
+    "version": "3.2.11",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/user.ts

@@ -125,7 +125,8 @@ class UserLoginHandler extends Handler {
         this.session.uid = udoc._id;
         this.session.scope = PERM.PERM_ALL.toString();
         this.session.save = rememberme;
-        this.response.redirect = redirect || ((this.request.referer || '/login').endsWith('/login')
+        this.response.redirect = (redirect ? decodeURIComponent(redirect) : '')
+            || ((this.request.referer || '/login').endsWith('/login')
                 ? this.url('homepage')
                 : this.request.referer);
     }