Fix JS syntax error when displaying generated scraper code (#104)

The generated Python scraper code was being inserted raw into HTML,
which could break parsing if the code contained sequences like
"</script>" or "</code>" in string literals. Added the |e (escape)
filter to properly HTML-escape the code content.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: mbuckingham74

backend/app/templates/admin/partials/generated_scraper.html

@@ -63,7 +63,7 @@ <h3 class="text-lg font-semibold dark:text-white flex items-center gap-2">
                     Copy
                 </button>
             </div>
-            <pre id="scraper-code" class="bg-gray-900 text-gray-100 rounded-lg p-4 overflow-x-auto text-sm font-mono max-h-96 overflow-y-auto"><code>{{ result.code }}</code></pre>
+            <pre id="scraper-code" class="bg-gray-900 text-gray-100 rounded-lg p-4 overflow-x-auto text-sm font-mono max-h-96 overflow-y-auto"><code>{{ result.code|e }}</code></pre>
         </div>
     </details>