Add custom page template for composable products, bump to v1.3.2

- Custom WooCommerce template with compact header + full-width selector
- Twig layout template (single-product-composable.html.twig) + PHP loader
- Body class 'single-product-composable' for CSS scoping
- Renamed *.twig to *.html.twig (proper naming convention)
- Refreshed .pot with accurate file refs, merged all .po files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,20 @@ 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).
 
+## [1.3.2] - 2026-03-01
+
+### Added
+
+- **Custom page template** for composable products — replaces the standard WooCommerce two-column layout (large image gallery + summary) with a compact product info header and full-width product selector grid
+- New Twig template `single-product-composable.html.twig` with PHP loader for WooCommerce template override
+- Body class `single-product-composable` for CSS scoping on composable product pages
+
+### Changed
+
+- Renamed Twig templates from `*.twig` to `*.html.twig` (proper Twig naming convention)
+- Refreshed translation catalog (.pot) with accurate file references and line numbers
+- Updated all .po/.mo translation files via `msgmerge`
+
 ## [1.3.1] - 2026-03-01
 
 ### Added