fix(analytics): remove conflicting next config rewrite and enable proxy client

lib/config.ts

@@ -37,7 +37,7 @@ function createConfig() {
       umami: {
         websiteId: env.UMAMI_WEBSITE_ID,
         apiEndpoint: env.UMAMI_API_ENDPOINT || 'https://analytics.infra.mintel.me',
-        enabled: Boolean(env.UMAMI_WEBSITE_ID),
+        enabled: typeof window !== 'undefined' || Boolean(env.UMAMI_WEBSITE_ID),
       },
     },