feat: implement HeritageImageController with proxyImage

Fetches the UNESCO image URL from world_heritage_site_images via the
Image model and streams the binary response back to the browser,
bypassing CORS/CORP restrictions that block direct browser requests.

Closes #471

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

Author: zigzagdev

src/app/Packages/Features/Controller/HeritageImageController.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Packages\Features\Controller;
+
+use App\Http\Controllers\Controller;
+use App\Models\Image;
+use Illuminate\Http\Request;
+use Illuminate\Http\Response;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Facades\Http;
+
+class HeritageImageController extends Controller
+{
+    public function proxyImage(Request $request, int $id): Response|JsonResponse
+    {
+        $image = Image::find($id);
+
+        if ($image === null) {
+            return response()->json(['error' => 'Image not found'], 404);
+        }
+
+        $upstream = Http::withHeaders([
+            'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+        ])->get($image->url);
+
+        if ($upstream->failed()) {
+            return response()->json(['error' => 'Failed to fetch image from upstream'], 502);
+        }
+
+        return response($upstream->body(), 200)
+            ->header('Content-Type', $upstream->header('Content-Type'))
+            ->header('Access-Control-Allow-Origin', '*');
+    }
+}