Toolvana: production-ready media tools platform (CodeIgniter 4)

- 134-tool registry with programmatic SEO (unique titles/H1/descriptions,
  JSON-LD graphs, sitemap index, canonical 301 enforcement via required filter)
- DB-backed job queue (SKIP LOCKED) with drivers: Ffmpeg, Images (GD),
  Pdf (qpdf/gs/poppler), Youtube (thumbnails), Qr (server-side PNG)
- Security: SSRF guard, MIME validation, rate limits, API-key auth,
  bcrypt admin login, security headers
- Admin panel: dashboard, tools/categories/guides CRUD, SEO audit,
  analytics, job inspector with retry, system health, feature flags
- Docker deployment (nginx + web/api FPM pools + scalable workers),
  PHPUnit suite (19 tests / 1139 assertions), PWA manifest + service worker

app/Controllers/Errors.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controllers;
+
+/**
+ * Error pages. Every one offers a route back into the toolbox.
+ * Deliberately standalone (works when invoked from the router's 404
+ * override without full initController).
+ */
+final class Errors extends BaseController
+{
+    public function showNotFound(): string
+    {
+        return $this->notFound();
+    }
+
+    public function notFound(): string
+    {
+        service('analytics')->sessionHash(); // ensure session exists for ownership checks
+        service('seo')->title('Tool not found')
+            ->description('The page you requested does not exist. Browse popular tools instead.')
+            ->noIndex();
+
+        // status rides the shared response; body returned as string
+        service('response')->setStatusCode(404);
+
+        return view('errors/tool_not_found', [
+            'popular'    => service('finder')->popular(6),
+            'categories' => service('finder')->categories(),
+        ]);
+    }
+
+    public function forbidden(): string
+    {
+        service('seo')->title('Access denied')->noIndex();
+        service('response')->setStatusCode(403);
+
+        return view('errors/http', [
+            'code' => 403, 'title' => 'Access denied',
+            'message' => 'You do not have permission to view this page.',
+        ]);
+    }
+
+    public function serverError(): string
+    {
+        service('seo')->title('Something went wrong')->noIndex();
+        service('response')->setStatusCode(500);
+
+        return view('errors/http', [
+            'code' => 500, 'title' => 'Something went wrong',
+            'message' => 'Our team has been notified. Please try again in a moment.',
+        ]);
+    }
+}