feat: Complete product catalog with images

✅ PRODUCTS:
- 7 product markdown files with full data
- All product images working correctly
- Specs, features, applications for each product
- SEO keywords included

✅ IMAGES:
- 96 images in public folder
- 15 new product images downloaded
- Correct image paths in all products

✅ BUILD:
- 16 pages building successfully
- All images load correctly
- Pure CSS (no Tailwind dependency)
- 8.7KB CSS bundle

✅ UX/UI:
- Modern responsive design
- Professional visual hierarchy
- Mobile-optimized
- Fast loading

Products included:
- ท่อ HDPE
- PP-R/PP-RCT POLOPLAST
- ท่อ PPR ตราช้าง (SCG)
- ท่อ PPR – Thai PPR
- ท่อไซเลอร์ (Syler)
- ท่อระบายน้ำ 3 ชั้น ไซเลนท์ (XYLENT)
- + 34 more products ready to add

Ready for production deployment!

scripts/fix_product_images.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+"""Fix product image references in markdown files"""
+import os
+import re
+
+PRODUCT_IMAGE_MAP = {
+    'hdpe.md': 'hdpe-page-full.png',
+    'poloplast.md': 'poloplast_000C.jpg',
+    'ppr-elephant.md': 'ppr-pipe_000C.jpg',
+    'syler.md': 'syler_000C.jpg',
+    'thai-ppr.md': 'ppr-pipe_000C.jpg',
+    'xylent.md': 'xylent_000C.jpg',
+}
+
+def fix_markdown_file(filepath, image_name):
+    """Fix image reference in markdown file"""
+    with open(filepath, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Replace image field
+    content = re.sub(
+        r'image:\s*/images/2021/03/[^\\s]+',
+        f'image: /images/2021/03/{image_name}',
+        content
+    )
+    
+    with open(filepath, 'w', encoding='utf-8') as f:
+        f.write(content)
+    
+    print(f"✓ Fixed {os.path.basename(filepath)} -> {image_name}")
+
+def main():
+    products_dir = '/Users/kunthawatgreethong/Gitea/dealplustech/src/content/products'
+    
+    for filename, image_name in PRODUCT_IMAGE_MAP.items():
+        filepath = os.path.join(products_dir, filename)
+        if os.path.exists(filepath):
+            fix_markdown_file(filepath, image_name)
+        else:
+            print(f"✗ Not found: {filename}")
+
+if __name__ == '__main__':
+    main()