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/SystemPasswordGate.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Models\Setting;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class SystemPasswordGate
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        $systemPassword = Setting::get('system_password');
+
+        if (! $systemPassword) {
+            return $next($request);
+        }
+
+        if ($request->session()->get('system_password_verified') === true) {
+            return $next($request);
+        }
+
+        return redirect()->route('system-password');
+    }
+}