Add Fortify auth, Flux dark mode, demo seed, and Docker hot reload.

Protect recordings per user, seed a demo login on container start, and bind-mount the app with Vite HMR for local Compose development.

routes/channels.php

@@ -1,17 +1,12 @@
 <?php
 
+use App\Models\Recording;
+use App\Models\User;
 use Illuminate\Support\Facades\Broadcast;
 
-/*
-|--------------------------------------------------------------------------
-| Broadcast Channels
-|--------------------------------------------------------------------------
-|
-| Transcription updates use the public "recordings" channel (no auth).
-| Private channel stubs can be added here when the app gains users.
-|
-*/
-
-Broadcast::channel('App.Models.User.{id}', function ($user, $id) {
-    return (int) $user->id === (int) $id;
+Broadcast::channel('recording.{recordingId}', function (User $user, int $recordingId): bool {
+    return Recording::query()
+        ->whereKey($recordingId)
+        ->where('user_id', $user->id)
+        ->exists();
 });