Add SealShare file sharing application with encryption, branding, auth, Docker, and Octane support

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Middleware/EnsureSetupComplete.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Models\User;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureSetupComplete
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (! User::query()->where('is_admin', true)->exists() && ! $request->is('setup', 'setup/*', 'livewire*')) {
+            return redirect()->route('setup');
+        }
+
+        return $next($request);
+    }
+}