Bump version to 1.1.9 - Fix critical admin rendering bug

Fix overly broad CSS selectors that broke admin tabs in v1.1.8.

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

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

CHANGELOG.md

@@ -5,6 +5,32 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.9] - 2025-12-31
+
+### Fixed
+
+- **CRITICAL**: Admin rendering completely broken - tabs disappeared and fields appeared out of context after v1.1.8 release
+- CSS selectors were too broad, hiding tab navigation along with field groups
+- Removed `!important` flags that caused overly aggressive hiding
+
+### Changed
+
+- Made CSS selectors more specific: `.options_group.show_if_composable` for field groups only
+- Added separate rule for tab links: `.product_data_tabs li.composable_options`
+- Tab navigation now works correctly without hiding itself
+
+### Technical
+
+- Modified files: assets/css/admin.css (lines 22-40)
+- Root cause: `.show_if_composable` class used by WooCommerce for both tab links AND field groups
+- Solution: Separate selectors for each use case to prevent unintended hiding
+
+### Notes
+
+- This release fixes critical regression introduced in v1.1.8
+- Admin interface now renders correctly with visible tabs and properly positioned fields
+- No `!important` flags needed with specific selectors
+
 ## [1.1.8] - 2025-12-31
 
 ### Fixed