refactor(auth): drop implicit email verification on invitation link login

The invitation-link login path previously marked the account as
email-verified as a side effect of authenticating, without the user ever
proving control of the mailbox. Remove that branch so every account
goes through the standard signed-URL verification flow.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/Http/Controllers/Controller.php

@@ -94,10 +94,6 @@ class Controller extends BaseController
                 } else {
                     $team = $user->teams()->first();
                 }
-                if (is_null(data_get($user, 'email_verified_at'))) {
-                    $user->email_verified_at = now();
-                    $user->save();
-                }
                 Auth::login($user);
                 session(['currentTeam' => $team]);