refactor: add return type hints to all controller methods

Added proper return types (View, RedirectResponse, JsonResponse, Collection)
to 40+ controller methods across 16 controllers. Also added missing
imports for Illuminate response types and tightened parameter types
(e.g. InstallationController::showStep now uses int instead of mixed).

app/Http/Controllers/Miscellaneous/LogoGeneratorController.php

@@ -4,11 +4,14 @@ namespace App\Http\Controllers\Miscellaneous;
 
 use App\Http\Controllers\Controller;
 use App\Models\Miscellaneous\WebsiteSetting;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
+use Illuminate\View\View;
 
 class LogoGeneratorController extends Controller
 {
-    public function index()
+    public function index(): View|RedirectResponse
     {
         if (! hasPermission('generate_logo')) {
             return to_route('me.show')->with([
@@ -19,7 +22,7 @@ class LogoGeneratorController extends Controller
         return view('logo-generator');
     }
 
-    public function store(Request $request)
+    public function store(Request $request): JsonResponse
     {
         $request->validate(['logo' => 'required|image|mimes:jpeg,png,gif,webp|max:5120']);