feat: add user impersonation service

app/Http/Middleware/ImpersonationMiddleware.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Middleware;
+
+use App\Services\ImpersonationService;
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Symfony\Component\HttpFoundation\Response;
+
+final class ImpersonationMiddleware
+{
+    public function __construct(
+        private readonly ImpersonationService $impersonationService
+    ) {}
+
+    public function handle(Request $request, Closure $next): Response
+    {
+        // Check if impersonation has expired
+        if ($this->impersonationService->isImpersonating() &&
+            $this->impersonationService->isImpersonationExpired()) {
+
+            $this->impersonationService->stopImpersonation($request);
+
+            // Redirect to admin dashboard with expired message
+            return redirect()->to(\Filament\Pages\Dashboard::getUrl())->with('impersonation_expired', 'Your impersonation session has expired.');
+        }
+
+        // Share impersonation data with all views
+        if ($this->impersonationService->isImpersonating()) {
+            $impersonator = $this->impersonationService->getCurrentImpersonator();
+            $remainingMinutes = $this->impersonationService->getRemainingMinutes();
+            $startTime = $this->impersonationService->getImpersonationStartTime();
+
+            view()->share('isImpersonating', true);
+            view()->share('impersonator', $impersonator);
+            view()->share('impersonationTarget', Auth::user());
+            view()->share('impersonationRemainingMinutes', $remainingMinutes);
+            view()->share('impersonationStartTime', $startTime);
+        } else {
+            view()->share('isImpersonating', false);
+            view()->share('impersonator', null);
+            view()->share('impersonationTarget', null);
+            view()->share('impersonationRemainingMinutes', 0);
+            view()->share('impersonationStartTime', null);
+        }
+
+        return $next($request);
+    }
+}