perf: lazy-load ShaderGradient and fix image cache TTL

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

next.config.ts

@@ -46,7 +46,7 @@ const nextConfig: NextConfig = {
   // Image optimization
   images: {
     formats: ["image/webp", "image/avif"],
-    minimumCacheTTL: 60,
+    minimumCacheTTL: 2592000,
     remotePatterns: [
       {
         protocol: "https",
@@ -169,7 +169,35 @@ const nextConfig: NextConfig = {
         ],
       },
       {
-        source: "/api/(.*)",
+        // Only prevent caching for real-time/sensitive API routes
+        source: "/api/n8n/(.*)",
+        headers: [
+          {
+            key: "Cache-Control",
+            value: "no-store, no-cache, must-revalidate, proxy-revalidate",
+          },
+        ],
+      },
+      {
+        source: "/api/auth/(.*)",
+        headers: [
+          {
+            key: "Cache-Control",
+            value: "no-store, no-cache, must-revalidate, proxy-revalidate",
+          },
+        ],
+      },
+      {
+        source: "/api/email/(.*)",
+        headers: [
+          {
+            key: "Cache-Control",
+            value: "no-store, no-cache, must-revalidate, proxy-revalidate",
+          },
+        ],
+      },
+      {
+        source: "/api/contacts/(.*)",
         headers: [
           {
             key: "Cache-Control",