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>

assets/css/admin.css

@@ -111,6 +111,18 @@
     font-style: italic;
 }
 
+/* Hide table headers when there are no pricing rules */
+.wc-tpp-tiers-container:empty ~ thead,
+.wc-tpp-packages-container:empty ~ thead {
+    display: none;
+}
+
+/* Alternative approach: hide thead when tbody is empty (more reliable) */
+.wc-tpp-tiers-table:has(tbody.wc-tpp-tiers-container:empty) thead,
+.wc-tpp-packages-table:has(tbody.wc-tpp-packages-container:empty) thead {
+    display: none;
+}
+
 /* Checkbox styling improvements */
 #_wc_tpp_restrict_to_packages,
 input[id^="wc_tpp_restrict_to_packages_"] {