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

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

app/api/snippets/route.ts

@@ -1,6 +1,8 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getSnippets } from '@/lib/directus';
 
+const CACHE_TTL = 300; // 5 minutes
+
 export async function GET(request: NextRequest) {
   try {
     const { searchParams } = new URL(request.url);
@@ -9,9 +11,10 @@ export async function GET(request: NextRequest) {
     
     const snippets = await getSnippets(limit, featured);
     
-    return NextResponse.json({
-      snippets: snippets || []
-    });
+    return NextResponse.json(
+      { snippets: snippets || [] },
+      { headers: { 'Cache-Control': `public, s-maxage=${CACHE_TTL}, stale-while-revalidate=${CACHE_TTL * 2}` } }
+    );
   } catch (_error) {
     return NextResponse.json({ error: 'Failed to fetch snippets' }, { status: 500 });
   }