fix: final review wave — public routes, inbox 419, url schemes, deep_link, tests

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/app/Http/Controllers/Me/ChannelsController.php

@@ -31,8 +31,8 @@ class ChannelsController extends Controller
         $data = $request->validate([
             'type' => ['required', 'in:webhook'],
             'config' => ['required', 'array'],
-            'config.deliver_url' => ['required', 'url'],
-            'config.presence_url' => ['required', 'url'],
+            'config.deliver_url' => ['required', 'url:http,https'],
+            'config.presence_url' => ['required', 'url:http,https'],
         ], ['type.in' => 'Через API добавляется только webhook; Telegram подключается через /start.']);
 
         $channel = $user->channels()->create([