fix(analytics): restore Smart Proxy mechanism and remove conflicting rewrites

lib/services/analytics/umami-analytics-service.ts

@@ -68,15 +68,12 @@ export class UmamiAnalyticsService implements AnalyticsService {
   private async sendPayload(type: 'event', data: Record<string, any>) {
     if (!this.options.enabled) return;
 
+    // On the client, we don't need the websiteId (it's injected by the server-side proxy handler).
+    // On the server, we need it because we're calling the Umami API directly.
     const isClient = typeof window !== 'undefined';
-    const websiteId =
-      this.websiteId ||
-      (isClient ? (process.env.NEXT_PUBLIC_UMAMI_WEBSITE_ID as string) : undefined);
 
-    if (!websiteId) {
-      this.logger.warn(
-        `Umami tracking called on ${isClient ? 'client' : 'server'} but no Website ID configured`,
-      );
+    if (!isClient && !this.websiteId) {
+      this.logger.warn('Umami tracking called on server but no Website ID configured');
       return;
     }