Release version 1.2.5 - Parent product default pricing and UI enhancements

Added:
- Parent product default pricing for variable products - set tier/package pricing once on parent, variations inherit unless overridden
- Hide empty table headers in admin until pricing rules are defined

Technical:
- Added parent fallback logic to get_tier_price() and get_package_price() methods
- Created helper methods get_packages_with_fallback() and is_restriction_enabled() in cart class
- Updated all cart methods to support parent product defaults
- Added CSS :has() selectors to hide table headers when tbody is empty
- Fixed cart pricing calls to pass correct product ID for fallback resolution

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

includes/class-wc-tpp-frontend.php

@@ -133,6 +133,11 @@ if (!class_exists('WC_TPP_Frontend')) {
         $effective_id = $variation_id > 0 ? $variation_id : $product_id;
         $tiers = get_post_meta($effective_id, '_wc_tpp_tiers', true);
 
+        // Fall back to parent pricing if variation doesn't have its own pricing
+        if ((empty($tiers) || !is_array($tiers)) && $variation_id > 0) {
+            $tiers = get_post_meta($product_id, '_wc_tpp_tiers', true);
+        }
+
         if (empty($tiers) || !is_array($tiers)) {
             return null;
         }
@@ -159,6 +164,11 @@ if (!class_exists('WC_TPP_Frontend')) {
         $effective_id = $variation_id > 0 ? $variation_id : $product_id;
         $packages = get_post_meta($effective_id, '_wc_tpp_packages', true);
 
+        // Fall back to parent pricing if variation doesn't have its own pricing
+        if ((empty($packages) || !is_array($packages)) && $variation_id > 0) {
+            $packages = get_post_meta($product_id, '_wc_tpp_packages', true);
+        }
+
         if (empty($packages) || !is_array($packages)) {
             return null;
         }