fix: Defer textdomain loading to init action for WordPress 6.7+ compatibility (v0.4.8)

Fixes _load_textdomain_just_in_time notice and headers already sent warnings
on admin pages by deferring load_plugin_textdomain() and Settings tab label
initialization to the init action instead of plugins_loaded.

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

CHANGELOG.md

@@ -5,6 +5,14 @@ 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).
 
+## [0.4.8] - 2026-02-07
+
+### Fixed
+
+- Fixed `_load_textdomain_just_in_time` notice on admin pages (WordPress 6.7+ compatibility)
+- Deferred `load_plugin_textdomain()` to `init` action instead of `plugins_loaded`
+- Deferred Settings tab label initialization to avoid early translation loading
+
 ## [0.4.7] - 2026-02-03
 
 ### Added