Redirect legacy /q/* URLs to canonical ladl.link addresses.

External /q requests 301/307 to ladl.link; internal X-Ladill-Internal requests still serve content for platform proxying.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Http/Middleware/RedirectLegacyQrToLadillLink.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Support\LadillLink;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class RedirectLegacyQrToLadillLink
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (! preg_match('#^q/[a-z0-9]#i', ltrim($request->path(), '/'))) {
+            return $next($request);
+        }
+
+        if (LadillLink::isInternalRequest($request)) {
+            return $next($request);
+        }
+
+        return LadillLink::legacyRedirect($request);
+    }
+}