Update CHANGELOG.md for version 1.0.0: major GUI overhaul, added multi-threading support, and enhanced progress tracking

Author: Domush

CHANGELOG.md

@@ -4,6 +4,34 @@ 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).
 
+## [1.0.0] - 2025-01-27
+
+### Changed
+- Major overhaul of the GUI, switched from Tkinter to PyQt6
+- Improved GUI responsiveness and layout organization
+- Enhanced TranscriptProcessorGUI with better progress tracking and status updates
+- Restructured layout to include AI provider and prompts sections
+- Streamlined progress reporting and file processing notifications
+- Dynamic window sizing based on screen height
+- Made the file listing section the main focus now that the status log isn't as vital
+
+### Added
+- Window icon and consistent styling
+- Added multi-threading support
+  - You can now edit AI prompts while it processes and it'll use the new prompts on the next file
+- Directory rescan functionality for file list updates
+  - Checking 'Include subdirectories' now triggers an automatic re-scan
+- File list display with auto-scrolling
+- Enhanced status indicators during processing
+  - Files now have status icons. No more digging through the status log
+- Keyboard shortcuts for saving and canceling in Prompt Editor
+
+### Enhanced
+- Progress tracking and UI responsiveness
+- Processing status updates system
+- Notification system for skipped files
+- Error handling and status enum implementation
+
 ## [0.3.0] - 2024-01-26
 
 ### Added