chore: remove PostHog analytics and update dependencies to latest minor versions

hooks/use-library-cache.ts

@@ -1,110 +0,0 @@
-'use client';
-
-import { useState, useEffect } from 'react';
-
-interface LibraryCacheItem<T> {
-  data: T;
-  timestamp: number;
-  expiresAt: number;
-}
-
-export function useLibraryCache<T>(
-  key: string, 
-  fetcher: () => Promise<T>, 
-  ttl: number = 30 * 60 * 1000 // 30 minutes default
-) {
-  const [data, setData] = useState<T | null>(null);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<Error | null>(null);
-
-  const getCacheKey = (key: string) => `library-cache-${key}`;
-
-  const getFromCache = (key: string): T | null => {
-    if (typeof window === 'undefined') return null;
-    
-    try {
-      const cached = localStorage.getItem(getCacheKey(key));
-      if (!cached) return null;
-      
-      const item: LibraryCacheItem<T> = JSON.parse(cached);
-      
-      // Check if expired
-      if (Date.now() > item.expiresAt) {
-        localStorage.removeItem(getCacheKey(key));
-        return null;
-      }
-      
-      return item.data;
-    } catch (error) {
-      console.warn('Failed to get cached data:', error);
-      localStorage.removeItem(getCacheKey(key));
-      return null;
-    }
-  };
-
-  const setToCache = (key: string, data: T, ttl: number) => {
-    if (typeof window === 'undefined') return;
-    
-    const item: LibraryCacheItem<T> = {
-      data,
-      timestamp: Date.now(),
-      expiresAt: Date.now() + ttl
-    };
-    
-    try {
-      localStorage.setItem(getCacheKey(key), JSON.stringify(item));
-    } catch (error) {
-      console.warn('Failed to cache data:', error);
-    }
-  };
-
-  useEffect(() => {
-    const loadData = async () => {
-      setLoading(true);
-      setError(null);
-      
-      // Check cache first
-      const cached = getFromCache(key);
-      if (cached) {
-        setData(cached);
-        setLoading(false);
-        return;
-      }
-      
-      // Fetch fresh data
-      try {
-        const result = await fetcher();
-        setData(result);
-        setToCache(key, result, ttl);
-      } catch (err) {
-        setError(err as Error);
-      } finally {
-        setLoading(false);
-      }
-    };
-
-    loadData();
-  }, [key, ttl]);
-
-  const refresh = async () => {
-    setLoading(true);
-    setError(null);
-    
-    try {
-      const result = await fetcher();
-      setData(result);
-      setToCache(key, result, ttl);
-    } catch (err) {
-      setError(err as Error);
-    } finally {
-      setLoading(false);
-    }
-  };
-
-  const clearCache = () => {
-    if (typeof window === 'undefined') return;
-    localStorage.removeItem(getCacheKey(key));
-  };
-
-  return { data, loading, error, refresh, clearCache };
-}