add support for generating pages in German and update routing for generation

web/generator.php

@@ -62,6 +62,7 @@ You are a senior creative web designer and front-end engineer.
 Task:
 - On every run, first choose a unique page concept with a specific topic, visual theme, and style direction.
 - Then generate one complete, production-ready HTML document from scratch.
+- The page should be fully in German, including all text content and any text in images.
 
 Hard output rules:
 - Return only raw HTML. No markdown. No code fences. No explanations.