fix namespace and use spelling mistake

apps/backend/app/Providers/AppServiceProvider.php

@@ -1,11 +1,11 @@
 <?php
 
-namespace app\Providers;
+namespace App\Providers;
 
-use app\Models\Event;
-use app\Models\User;
-use app\Observers\EventObserver;
-use app\Observers\UserObserver;
+use App\Models\Event;
+use App\Models\User;
+use App\Observers\EventObserver;
+use App\Observers\UserObserver;
 use Illuminate\Support\Facades\Route;
 use Illuminate\Support\ServiceProvider;
 

apps/backend/app/Providers/BroadcastServiceProvider.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace app\Providers;
+namespace App\Providers;
 
 use Illuminate\Support\Facades\Broadcast;
 use Illuminate\Support\ServiceProvider;

apps/backend/app/Providers/GateServiceProvider.php

@@ -1,13 +1,13 @@
 <?php
 
-namespace app\Providers;
+namespace App\Providers;
 
-use app\Models\Event;
-use app\Models\Task;
-use app\Models\User;
-use app\Policies\EventsPolicy;
-use app\Policies\TasksPolicy;
-use app\Policies\UsersPolicy;
+use App\Models\Event;
+use App\Models\Task;
+use App\Models\User;
+use App\Policies\EventsPolicy;
+use App\Policies\TasksPolicy;
+use App\Policies\UsersPolicy;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\ServiceProvider;