Reduce Vercel serverless function costs

- Change homepage polling intervals from 20s to 5min for both
  active users and global stats
- Increase active-users API server-side cache from 1min to 5min
- Remove getServerSideProps from turing page to eliminate SSR

https://claude.ai/code/session_01UGfnsFfXcafbYbt2TuFUVq

Author: claude

src/components/Home/HomeHero.tsx

@@ -133,8 +133,8 @@ export const HomeHero: React.FC<Props> = ({ scrollHandler }: Props) => {
     // Fetch immediately
     fetchGlobalStats()
 
-    // Update every 20 seconds
-    const interval = setInterval(fetchGlobalStats, 20000)
+    // Update every 5 minutes
+    const interval = setInterval(fetchGlobalStats, 5 * 60 * 1000)
 
     return () => clearInterval(interval)
   }, [])
@@ -149,8 +149,8 @@ export const HomeHero: React.FC<Props> = ({ scrollHandler }: Props) => {
     // Fetch immediately
     fetchActiveUsers()
 
-    // Update every 20 seconds
-    const interval = setInterval(fetchActiveUsers, 20000)
+    // Update every 5 minutes
+    const interval = setInterval(fetchActiveUsers, 5 * 60 * 1000)
 
     return () => clearInterval(interval)
   }, [])

src/pages/api/active-users.ts

@@ -8,7 +8,7 @@ type Data = {
 
 // In-memory cache
 let cachedUsers: { value: number; timestamp: number } | null = null
-const CACHE_DURATION = 60 * 1000 // 1 minute
+const CACHE_DURATION = 5 * 60 * 1000 // 5 minutes
 
 /**
  * API endpoint to get active user count from PostHog

src/pages/turing.tsx

@@ -333,10 +333,4 @@ const Turing: React.FC<Props> = (props: Props) => {
   )
 }
 
-export const getServerSideProps = async () => {
-  return {
-    props: {},
-  }
-}
-
 export default TuringPage