Style: Unify cart Continue Shopping button with wishlist style

Updated cart dropdown Continue Shopping buttons to use btn-outline
class (matching wishlist style) instead of btn-text across all pages.

Changes:
- shop.html: btn-text → btn-outline
- contact.html: btn-text → btn-outline
- product.html: btn-text → btn-outline
- about.html: btn-text → btn-outline

All cart Continue Shopping buttons now have consistent styling
with the wishlist Continue Shopping button (purple outline style).

PERFORMANCE_OPTIMIZATION.md

@@ -1,4 +1,5 @@
 # Performance Optimization Report
+
 ## SkyArtShop Website Performance Enhancements
 
 **Date:** January 14, 2026  
@@ -10,6 +11,7 @@
 ## Executive Summary
 
 Successfully optimized SkyArtShop for maximum performance without changing any functionality. All optimizations focus on:
+
 - Faster load times
 - Reduced memory usage
 - Efficient API calls
@@ -17,6 +19,7 @@ Successfully optimized SkyArtShop for maximum performance without changing any f
 - Intelligent caching
 
 **Key Results:**
+
 - ✅ API response times: 7-12ms (excellent performance)
 - ✅ Backend cache providing 0-41% performance gains
 - ✅ All 30+ database indexes verified and optimized
@@ -29,6 +32,7 @@ Successfully optimized SkyArtShop for maximum performance without changing any f
 ### New Indexes Created
 
 #### Products Table
+
 ```sql
 -- Slug lookup optimization (for product detail pages)
 CREATE INDEX idx_products_slug ON products(slug) WHERE isactive = true;
@@ -45,6 +49,7 @@ CREATE INDEX idx_products_active_category ON products(isactive, category)
 **Impact:** Product queries now use optimized index scans instead of full table scans.
 
 #### Blog Posts Table
+
 ```sql
 -- Slug lookup for individual blog posts
 CREATE INDEX idx_blogposts_slug ON blogposts(slug) WHERE ispublished = true;
@@ -57,6 +62,7 @@ CREATE INDEX idx_blogposts_published ON blogposts(ispublished, createdat DESC)
 **Impact:** Blog post queries execute 40-60% faster with index-only scans.
 
 #### Portfolio Projects Table
+
 ```sql
 -- Composite index for main portfolio query
 CREATE INDEX idx_portfolio_active_display 
@@ -89,6 +95,7 @@ VACUUM ANALYZE;
 ### New File: `/website/public/assets/js/api-cache.js`
 
 **Features:**
+
 - **Intelligent Caching:** Automatic caching of GET requests with configurable TTL
 - **Request Deduplication:** Multiple simultaneous requests to same endpoint only fetch once
 - **Memory Management:** Automatic cleanup of expired cache entries every 60 seconds
@@ -155,6 +162,7 @@ const response = await window.apiCache.fetch('/api/products');
 ### Script Loading Order
 
 All pages now load scripts in this optimized order:
+
 ```html
 <script src="/assets/js/api-cache.js"></script>  <!-- Load cache first -->
 <script src="/assets/js/shop-system.js"></script>
@@ -169,11 +177,13 @@ All pages now load scripts in this optimized order:
 The backend already had excellent performance optimizations in place:
 
 ### Existing Backend Caching
+
 - **Route-level caching:** Using `cacheMiddleware(ttl)`
 - **Query-level caching:** In-memory cache for SELECT queries
 - **Response optimization:** Field filtering, pagination, ETag generation
 
 ### Existing Database Optimizations
+
 - **Connection pooling:** 10-30 connections with keepAlive
 - **Query timeout:** 30s safeguard
 - **Prepared statements:** Automatic query plan caching
@@ -182,6 +192,7 @@ The backend already had excellent performance optimizations in place:
 ### API Route Performance
 
 All routes use:
+
 ```javascript
 // Cached for 5-30 minutes depending on endpoint
 cacheMiddleware(300000),  // 5 minutes
@@ -210,6 +221,7 @@ Automated testing of all endpoints with timing:
 ### Test Results
 
 #### API Endpoints (Cold vs Warm)
+
 ```
 /api/products
   HTTP 200 | Cold: 12ms | Warm: 7ms | Gain: 41%
@@ -233,6 +245,7 @@ Automated testing of all endpoints with timing:
 **Analysis:** Responses are already extremely fast (7-12ms). Backend cache shows up to 41% improvement on complex queries.
 
 #### Page Load Times
+
 ```
 /home       | HTTP 200 | Load: 8ms
 /shop       | HTTP 200 | Load: 7ms
@@ -249,21 +262,26 @@ Automated testing of all endpoints with timing:
 ### All Endpoints Verified ✅
 
 **Products API:**
+
 - ✅ GET /api/products - Returns all products with images
 - ✅ GET /api/products/featured - Returns 4 featured products
 - ✅ GET /api/products/:id - Returns single product by ID/slug
 - ✅ GET /api/categories - Returns unique categories
 
 **Portfolio API:**
+
 - ✅ GET /api/portfolio/projects - Returns 6 projects with images
 
 **Blog API:**
+
 - ✅ GET /api/blog/posts - Returns 3 published posts
 
 **Pages API:**
+
 - ✅ GET /api/pages - Returns all active custom pages
 
 ### Response Format (Consistent)
+
 ```json
 {
   "success": true,
@@ -273,7 +291,9 @@ Automated testing of all endpoints with timing:
 ```
 
 ### Error Handling
+
 All pages implement proper error handling:
+
 ```javascript
 try {
   const response = await window.apiCache.fetch('/api/...');
@@ -294,12 +314,14 @@ try {
 ### Frontend Memory Management
 
 **API Cache Memory:**
+
 - Maximum 500 cached entries (configurable)
 - Automatic cleanup every 60 seconds
 - Expired entries removed from memory
 - Memory-efficient crypto-based cache keys (MD5 hash)
 
 **Cache Statistics Available:**
+
 ```javascript
 // Get cache stats in browser console
 window.apiCache.getStats();
@@ -307,6 +329,7 @@ window.apiCache.getStats();
 ```
 
 **Manual Cache Control:**
+
 ```javascript
 // Clear specific entry
 window.apiCache.clear('/api/products');
@@ -318,6 +341,7 @@ window.clearAPICache();
 ### Backend Memory Management
 
 Already optimized:
+
 - Connection pool limits (max 30)
 - Query cache size limits
 - Automatic connection recycling
@@ -328,18 +352,21 @@ Already optimized:
 ## 8. Load Time Improvements
 
 ### Before Optimization (Estimated)
+
 - Cold API calls: ~15-20ms
 - Repeated API calls: ~15-20ms (no caching)
 - Database queries: Full table scans on some queries
 - Multiple simultaneous requests: Duplicate network calls
 
 ### After Optimization
+
 - Cold API calls: 7-12ms (backend cache + indexes)
 - Repeated API calls: <1ms (frontend cache hit)
 - Database queries: Index-only scans
 - Multiple simultaneous requests: Deduplicated (single fetch)
 
 ### Improvement Summary
+
 - **Database queries:** 40-60% faster with new indexes
 - **API responses:** Already excellent (7-12ms)
 - **Frontend cache hits:** Near-instant (<1ms)
@@ -353,6 +380,7 @@ Already optimized:
 ### Browser Console Logging
 
 Cache activity is logged for monitoring:
+
 ```javascript
 [Cache] FETCH: /api/products
 [Cache] SET: /api/products (TTL: 300000ms)
@@ -364,12 +392,14 @@ Cache activity is logged for monitoring:
 ### Performance Monitoring
 
 Check cache statistics:
+
 ```javascript
 // In browser console
 console.log(window.apiCache.getStats());
 ```
 
 Output:
+
 ```javascript
 {
   size: 6,              // Cached entries
@@ -389,11 +419,13 @@ Output:
 ### Database Monitoring
 
 Verify indexes:
+
 ```bash
 ./test-api-performance.sh
 ```
 
 Check query performance:
+
 ```sql
 -- In PostgreSQL
 EXPLAIN ANALYZE SELECT * FROM products WHERE isactive = true;
@@ -404,30 +436,35 @@ EXPLAIN ANALYZE SELECT * FROM products WHERE isactive = true;
 ## 10. Best Practices Implemented
 
 ### ✅ Database
+
 - Partial indexes with WHERE clauses (smaller, faster)
 - Composite indexes for multi-column queries
 - Regular ANALYZE for updated statistics
 - VACUUM for space reclamation
 
 ### ✅ Caching
+
 - Appropriate TTL per data type
 - Automatic cache invalidation
 - Request deduplication
 - Memory-efficient storage
 
 ### ✅ Frontend
+
 - Minimal dependencies
 - Progressive enhancement
 - Error boundaries
 - User-friendly error messages
 
 ### ✅ Backend
+
 - Query timeout safeguards
 - Connection pooling
 - Response compression
 - Security headers (Helmet.js)
 
 ### ✅ Testing
+
 - Automated performance testing
 - Cold vs warm comparison
 - Comprehensive endpoint coverage
@@ -440,6 +477,7 @@ EXPLAIN ANALYZE SELECT * FROM products WHERE isactive = true;
 ### Cache Management
 
 **Clear frontend cache:**
+
 ```javascript
 // In browser console
 window.clearAPICache();
@@ -447,6 +485,7 @@ window.clearAPICache();
 
 **Adjust cache TTL:**
 Edit `/website/public/assets/js/api-cache.js`:
+
 ```javascript
 this.ttlConfig = {
   '/api/products': 5 * 60 * 1000,  // Change to desired ms
@@ -457,12 +496,14 @@ this.ttlConfig = {
 ### Database Maintenance
 
 **Add new indexes:**
+
 ```sql
 -- In backend/optimize-database-indexes.sql
 CREATE INDEX CONCURRENTLY idx_name ON table(column);
 ```
 
 **Update statistics:**
+
 ```bash
 PGPASSWORD=SkyArt2025Pass psql -h localhost -U skyartapp -d skyartshop -c "ANALYZE;"
 ```
@@ -470,12 +511,14 @@ PGPASSWORD=SkyArt2025Pass psql -h localhost -U skyartapp -d skyartshop -c "ANALY
 ### Performance Testing
 
 **Run comprehensive test:**
+
 ```bash
 cd /media/pts/Website/SkyArtShop
 ./test-api-performance.sh
 ```
 
 **Monitor PM2 logs:**
+
 ```bash
 pm2 logs skyartshop
 ```
@@ -485,11 +528,13 @@ pm2 logs skyartshop
 ## 12. Files Modified
 
 ### New Files Created
+
 - ✅ `backend/optimize-database-indexes.sql` - Database optimization script
 - ✅ `website/public/assets/js/api-cache.js` - Frontend caching system
 - ✅ `test-api-performance.sh` - Automated testing script
 
 ### Modified Files
+
 - ✅ `website/public/portfolio.html` - Added api-cache integration
 - ✅ `website/public/blog.html` - Added api-cache integration
 - ✅ `website/public/shop.html` - Added api-cache integration
@@ -519,6 +564,7 @@ pm2 logs skyartshop
 While current performance is excellent, these could provide marginal gains:
 
 ### Advanced Optimizations (Optional)
+
 1. **Image Lazy Loading:** Already implemented with `loading="lazy"`
 2. **CDN Integration:** Consider CDN for static assets
 3. **Service Worker:** Add offline caching for PWA
@@ -526,6 +572,7 @@ While current performance is excellent, these could provide marginal gains:
 5. **WebP Images:** Convert images to WebP format
 
 ### Monitoring (Optional)
+
 1. **Real User Monitoring:** Track actual user load times
 2. **Error Tracking:** Sentry or similar for production errors
 3. **Analytics:** Track cache hit rates in production
@@ -544,6 +591,7 @@ While current performance is excellent, these could provide marginal gains:
 **Performance Grade: A+**
 
 The SkyArtShop website is now highly optimized for:
+
 - Fast load times (< 10ms)
 - Low memory usage (automatic cleanup)
 - Efficient API calls (cached + deduplicated)

PERFORMANCE_QUICK_REF.md

@@ -3,19 +3,23 @@
 ## What Was Done
 
 ### 🗄️ Database (Backend)
+
 - Added 6 new high-performance indexes
 - Total: **44 active indexes**
 - All tables analyzed and optimized
 - Vacuum completed for space reclamation
 
 ### 🚀 Frontend API Cache
+
 - New file: `api-cache.js` (intelligent caching)
 - Request deduplication (prevents duplicate calls)
 - Auto-cleanup every 60 seconds
 - Custom TTL per endpoint (5-30 minutes)
 
 ### 📄 Pages Updated
+
 All pages now use optimized API cache:
+
 - [home.html](website/public/home.html)
 - [shop.html](website/public/shop.html)
 - [portfolio.html](website/public/portfolio.html)
@@ -35,6 +39,7 @@ Frontend-Backend:   ✅ Verified Working
 ## Verify It's Working
 
 ### 1. Browser Console (F12)
+
 ```javascript
 // You should see cache messages like:
 [Cache] FETCH: /api/products
@@ -46,11 +51,13 @@ window.apiCache.getStats()
 ```
 
 ### 2. Network Tab (F12 → Network)
+
 - First page visit: You'll see API calls
 - Navigate to another page and back: Fewer/no API calls
 - This means cache is working! 🎉
 
 ### 3. Command Line Test
+
 ```bash
 cd /media/pts/Website/SkyArtShop
 ./test-api-performance.sh
@@ -59,12 +66,14 @@ cd /media/pts/Website/SkyArtShop
 ## How It Works
 
 ### Before Optimization
+
 ```
 User → Page → fetch('/api/products') → Server → Database → Response
 User → Page → fetch('/api/products') → Server → Database → Response (duplicate!)
 ```
 
 ### After Optimization
+
 ```
 User → Page → apiCache.fetch('/api/products') → Server → Database → Response → CACHE
 User → Page → apiCache.fetch('/api/products') → CACHE (instant!) ⚡
@@ -73,13 +82,16 @@ User → Page → apiCache.fetch('/api/products') → CACHE (instant!) ⚡
 ## Cache Control
 
 ### Clear Cache Manually
+
 ```javascript
 // In browser console (F12)
 window.clearAPICache();  // Clears all cached data
 ```
 
 ### Adjust Cache Time
+
 Edit `website/public/assets/js/api-cache.js`:
+
 ```javascript
 this.ttlConfig = {
   '/api/products': 5 * 60 * 1000,   // 5 minutes (default)
@@ -90,6 +102,7 @@ this.ttlConfig = {
 ## Monitoring
 
 ### Check Active Indexes
+
 ```sql
 SELECT indexname FROM pg_indexes 
 WHERE schemaname = 'public' 
@@ -97,6 +110,7 @@ AND indexname LIKE 'idx_%';
 ```
 
 ### Watch PM2 Logs
+
 ```bash
 pm2 logs skyartshop
 ```
@@ -111,6 +125,7 @@ pm2 logs skyartshop
 ## What Was NOT Changed
 
 ✅ **Zero functionality changes**
+
 - All features work exactly the same
 - User experience unchanged
 - Admin panel unchanged  
@@ -122,16 +137,19 @@ pm2 logs skyartshop
 ## Troubleshooting
 
 ### Cache not working?
+
 1. Hard refresh: `Ctrl+Shift+R`
 2. Check console for errors
 3. Verify api-cache.js loads: `curl http://localhost:5000/assets/js/api-cache.js`
 
 ### Slow queries?
+
 1. Run: `./test-api-performance.sh`
 2. Check if responses are >50ms
 3. Review database indexes
 
 ### Pages not loading?
+
 1. Check PM2: `pm2 status`
 2. Check logs: `pm2 logs skyartshop`
 3. Restart: `pm2 restart skyartshop`

website/public/about.html

@@ -119,7 +119,7 @@
                   <a href="/checkout" class="btn-primary-full"
                     >Proceed to Checkout</a
                   >
-                  <a href="/shop" class="btn-text">Continue Shopping</a>
+                  <a href="/shop" class="btn-outline">Continue Shopping</a>
                 </div>
               </div>
             </div>

website/public/assets/js/api-cache.js

@@ -14,12 +14,12 @@ class APICache {
 
     // Custom TTL for different endpoints
     this.ttlConfig = {
-      '/api/products': 5 * 60 * 1000,          // 5 min
+      "/api/products": 5 * 60 * 1000, // 5 min
-      '/api/products/featured': 10 * 60 * 1000, // 10 min
+      "/api/products/featured": 10 * 60 * 1000, // 10 min
-      '/api/categories': 30 * 60 * 1000,        // 30 min
+      "/api/categories": 30 * 60 * 1000, // 30 min
-      '/api/portfolio/projects': 10 * 60 * 1000, // 10 min
+      "/api/portfolio/projects": 10 * 60 * 1000, // 10 min
-      '/api/blog/posts': 5 * 60 * 1000,         // 5 min
+      "/api/blog/posts": 5 * 60 * 1000, // 5 min
-      '/api/pages': 10 * 60 * 1000,             // 10 min
+      "/api/pages": 10 * 60 * 1000, // 10 min
     };
 
     // Start periodic cleanup
@@ -79,7 +79,7 @@ class APICache {
     this.cache.set(key, {
       data,
       timestamp: Date.now(),
-      ttl
+      ttl,
     });
 
     console.log(`[Cache] SET: ${url} (TTL: ${ttl}ms)`);
@@ -99,7 +99,7 @@ class APICache {
    */
   clearAll() {
     this.cache.clear();
-    console.log('[Cache] CLEARED ALL');
+    console.log("[Cache] CLEARED ALL");
   }
 
   /**
@@ -107,7 +107,7 @@ class APICache {
    */
   async fetch(url, options = {}) {
     // Only cache GET requests
-    if (options.method && options.method !== 'GET') {
+    if (options.method && options.method !== "GET") {
       return fetch(url, options);
     }
 
@@ -118,7 +118,7 @@ class APICache {
         json: async () => cached,
         ok: true,
         status: 200,
-        fromCache: true
+        fromCache: true,
       };
     }
 
@@ -131,7 +131,7 @@ class APICache {
     // Make new request
     console.log(`[Cache] FETCH: ${url}`);
     const requestPromise = fetch(url, options)
-      .then(async response => {
+      .then(async (response) => {
         if (!response.ok) {
           throw new Error(`HTTP ${response.status}`);
         }
@@ -148,10 +148,10 @@ class APICache {
           json: async () => data,
           ok: true,
           status: response.status,
-          fromCache: false
+          fromCache: false,
         };
       })
-      .catch(error => {
+      .catch((error) => {
         // Remove from pending on error
         this.pendingRequests.delete(url);
         throw error;
@@ -192,8 +192,8 @@ class APICache {
         url: key,
         age: Date.now() - entry.timestamp,
         ttl: entry.ttl,
-        valid: this.isValid(entry)
+        valid: this.isValid(entry),
-      }))
+      })),
     };
   }
 }

website/public/contact.html

@@ -127,7 +127,7 @@
                   <a href="/checkout" class="btn-primary-full"
                     >Proceed to Checkout</a
                   >
-                  <a href="/shop" class="btn-text">Continue Shopping</a>
+                  <a href="/shop" class="btn-outline">Continue Shopping</a>
                 </div>
               </div>
             </div>

website/public/product.html

@@ -153,7 +153,7 @@
                 <a href="/checkout" class="btn-primary-full"
                   >Proceed to Checkout</a
                 >
-                <a href="/shop" class="btn-text">Continue Shopping</a>
+                <a href="/shop" class="btn-outline">Continue Shopping</a>
               </div>
             </div>
           </div>
@@ -259,7 +259,9 @@
             "Fetching product from API:",
             `/api/products/${productId}`
           );
-          const response = await window.apiCache.fetch(`/api/products/${productId}`);
+          const response = await window.apiCache.fetch(
+            `/api/products/${productId}`
+          );
           const data = await response.json();
           console.log("API response:", data);
 

website/public/shop.html

@@ -684,7 +684,7 @@
                   <a href="/checkout" class="btn-primary-full"
                     >Proceed to Checkout</a
                   >
-                  <a href="/shop" class="btn-text">Continue Shopping</a>
+                  <a href="/shop" class="btn-outline">Continue Shopping</a>
                 </div>
               </div>
             </div>