Fix speaker token ignored after badge verification or active join.

Process ?speaker= before registration gate and already-joined redirects so Events speakers get panelist role even when they previously registered as attendees.

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

app/Support/EventsRegistrationSession.php

@@ -42,11 +42,13 @@ class EventsRegistrationSession
     /** @param  array{email?: ?string, name?: ?string, badge_code?: ?string, speaker_token?: ?string}  $data */
     public static function store(Request $request, Room $room, array $data): void
     {
+        $existing = self::get($request, $room) ?? [];
+
         $request->session()->put(self::key($room), [
-            'email' => $data['email'] ?? null,
-            'name' => $data['name'] ?? null,
-            'badge_code' => $data['badge_code'] ?? null,
-            'speaker_token' => $data['speaker_token'] ?? null,
+            'email' => array_key_exists('email', $data) ? $data['email'] : ($existing['email'] ?? null),
+            'name' => array_key_exists('name', $data) ? $data['name'] : ($existing['name'] ?? null),
+            'badge_code' => array_key_exists('badge_code', $data) ? $data['badge_code'] : ($existing['badge_code'] ?? null),
+            'speaker_token' => array_key_exists('speaker_token', $data) ? $data['speaker_token'] : ($existing['speaker_token'] ?? null),
         ]);
     }