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/Views/errors/tool_not_found.php

@@ -0,0 +1,24 @@
+<section class="hero" style="padding:2.6rem 1.25rem 2.8rem">
+  <h1 style="font-size:clamp(1.5rem,4vw,2.2rem)">Tool not found</h1>
+  <p class="tagline">That page doesn't exist — but the toolbox is right here.</p>
+  <form class="hero-search" action="/search" method="get" role="search">
+    <input type="search" name="q" placeholder="Search a tool…" aria-label="Search tools">
+    <button type="submit">Search</button>
+  </form>
+</section>
+<div class="wrap">
+  <section class="block tight">
+    <h2 class="section-title">Popular tools</h2>
+    <div class="grid cols-3">
+      <?php foreach ($popular as $tool): ?>
+        <?= view('partials/tool_card', ['tool' => $tool]) ?>
+      <?php endforeach ?>
+    </div>
+  </section>
+  <section class="block tight">
+    <h2 class="section-title">Browse categories</h2>
+    <div class="chips">
+      <?php foreach ($categories as $c): ?><a class="chip" href="/<?= esc($c['slug']) ?>"><?= esc($c['name']) ?></a><?php endforeach ?>
+    </div>
+  </section>
+</div>