Optimize frontend deployment with proper cache headers

Update deployment script to set appropriate cache-control headers:
- HTML files: no-cache to prevent stale content
- Next.js static assets: 1 year cache with immutable flag
- Other assets: 1 day cache for optimal performance

This resolves chronic caching issues with admin panel updates.

scripts/deploy-frontend.sh

@@ -39,14 +39,42 @@ fi
 
 echo -e "${GREEN}✓ Build completed${NC}"
 
-# Upload to S3
-echo -e "${BLUE}📤 Uploading to S3...${NC}"
+# Upload to S3 with proper cache headers
+echo -e "${BLUE}📤 Uploading to S3 with optimized cache headers...${NC}"
+
+# First, delete old files
+echo -e "${BLUE}  🗑️  Cleaning old files...${NC}"
 aws s3 sync out/ s3://$S3_BUCKET/ \
   --region $REGION \
   --delete \
-  --cache-control "public, max-age=3600"
+  --exclude "*"
 
-echo -e "${GREEN}✓ Files uploaded to S3${NC}"
+# Upload HTML files with no-cache (always revalidate)
+echo -e "${BLUE}  📄 Uploading HTML files (no-cache)...${NC}"
+aws s3 sync out/ s3://$S3_BUCKET/ \
+  --region $REGION \
+  --exclude "*" \
+  --include "*.html" \
+  --cache-control "public, max-age=0, must-revalidate" \
+  --content-type "text/html"
+
+# Upload _next static assets with long-term cache (immutable, 1 year)
+echo -e "${BLUE}  🎨 Uploading Next.js static assets (1 year cache)...${NC}"
+aws s3 sync out/_next/ s3://$S3_BUCKET/_next/ \
+  --region $REGION \
+  --cache-control "public, max-age=31536000, immutable"
+
+# Upload other static assets with moderate cache (1 day)
+echo -e "${BLUE}  📦 Uploading other assets (1 day cache)...${NC}"
+aws s3 sync out/ s3://$S3_BUCKET/ \
+  --region $REGION \
+  --exclude "*" \
+  --exclude "*.html" \
+  --exclude "_next/*" \
+  --include "*" \
+  --cache-control "public, max-age=86400"
+
+echo -e "${GREEN}✓ All files uploaded to S3 with optimized cache headers${NC}"
 
 # Invalidate CloudFront cache
 echo -e "${BLUE}🔄 Invalidating CloudFront cache...${NC}"