perf: fix TBT/LCP/a11y — disable shader animation, cache APIs, fix images

Co-authored-by: denshooter <44590296+denshooter@users.noreply.github.com>

app/api/tech-stack/route.ts

@@ -3,14 +3,15 @@ import { getTechStack } from '@/lib/directus';
 import { checkRateLimit, getClientIp } from '@/lib/auth';
 
 export const runtime = 'nodejs';
+export const revalidate = 300;
 
 const CACHE_TTL = 300; // 5 minutes
 
 /**
  * GET /api/tech-stack
- * 
+ *
  * Loads Tech Stack from Directus with fallback to static data
- * 
+ *
  * Query params:
  *   - locale: en or de (default: en)
  */