fix: resolve lint errors in layout and route by updating analytics interface

app/api/contact/route.ts

@@ -10,8 +10,8 @@ export async function POST(req: Request) {
 
   // Set analytics context from request headers for high-fidelity server-side tracking
   // This fulfills the "server-side via nextjs proxy" requirement
-  if ("setServerContext" in services.analytics) {
-    (services.analytics as any).setServerContext({
+  if (services.analytics.setServerContext) {
+    services.analytics.setServerContext({
       userAgent: req.headers.get("user-agent") || undefined,
       language: req.headers.get("accept-language")?.split(",")[0] || undefined,
       referrer: req.headers.get("referer") || undefined,