Make room privacy optional by default so shared join links work out of the box.

New spaces are public unless the host explicitly enables private/invite-only mode.

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

tests/Feature/MeetWebTest.php

@@ -1318,14 +1318,16 @@ class MeetWebTest extends TestCase
         $this->actingAs($this->user)
             ->post('/rooms', [
                 'title' => 'Leadership space',
-                'invite_only' => true,
             ])
             ->assertRedirect();
 
+        $room = Room::where('title', 'Leadership space')->firstOrFail();
+
         $this->assertDatabaseHas('meet_rooms', [
             'title' => 'Leadership space',
             'type' => 'space',
         ]);
+        $this->assertFalse($room->setting('invite_only'));
     }
 
     public function test_space_create_sends_listener_email_invitations(): void