backend-infra-engineer: Release v0.3.0 snapshot

docs/C1-changelog.md

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+# Changelog
+
+## 0.3.0 (September 2025)
+
+### Major Features
+- **Complete Theme Management System**: 5+ built-in themes with custom theme creation and editing
+- **Multi-Session Workspace**: Work with multiple ROMs simultaneously in enhanced docked interface
+- **Enhanced Welcome Screen**: Themed interface with quick access to all editors and features
+- **Asar 65816 Assembler Integration**: Complete cross-platform ROM patching with assembly code
+- **ZSCustomOverworld v3**: Full integration with enhanced overworld editing capabilities
+- **Advanced Message Editing**: Enhanced text editing interface with improved parsing and real-time preview
+- **GUI Docking System**: Improved docking and workspace management for better user workflow
+- **Symbol Extraction**: Extract symbol names and opcodes from assembly files
+- **Modernized Build System**: Upgraded to CMake 3.16+ with target-based configuration
+
+### User Interface & Theming
+- **Built-in Themes**: Classic YAZE, YAZE Tre, Cyberpunk, Sunset, Forest, and Midnight themes
+- **Theme Editor**: Complete custom theme creation with save-to-file functionality
+- **Animated Background Grid**: Optional moving grid with color breathing effects
+- **Theme Import/Export**: Share custom themes with the community
+- **Responsive UI**: All UI elements properly adapt to selected themes
+
+### Enhancements
+- **Enhanced CLI Tools**: Improved z3ed with modern command line interface and TUI
+- **CMakePresets**: Added development workflow presets for better productivity
+- **Cross-Platform CI/CD**: Multi-platform automated builds and testing with lenient code quality checks
+- **Professional Packaging**: NSIS, DMG, and DEB/RPM installers
+- **ROM-Dependent Testing**: Separated testing infrastructure for CI compatibility with 46+ core tests
+- **Comprehensive Documentation**: Updated guides, help menus, and API documentation
+
+### Technical Improvements
+- **Modern C++23**: Latest language features for performance and safety
+- **Memory Safety**: Enhanced memory management with RAII and smart pointers
+- **Error Handling**: Improved error handling using absl::Status throughout
+- **Cross-Platform**: Consistent experience across Windows, macOS, and Linux
+- **Performance**: Optimized rendering and data processing
+
+### Bug Fixes
+- **Graphics Arena Crash**: Fixed double-free error during Arena singleton destruction
+- **SNES Tile Format**: Corrected tile unpacking algorithm based on SnesLab documentation
+- **Palette System**: Fixed color conversion functions (ImVec4 float to uint8_t conversion)
+- **CI/CD**: Fixed missing cstring include for Ubuntu compilation
+- **ROM Loading**: Fixed file path issues in tests
+
+## 0.2.2 (December 2024)
+- DungeonMap editing improvements
+- ZSCustomOverworld support
+- Cross platform file handling
+
+## 0.2.1 (August 2024)
+- Improved MessageEditor parsing
+- Added integration test window
+- Bitmap bug fixes
+
+## 0.2.0 (July 2024)
+- iOS app support
+- Graphics Sheet Browser
+- Project Files
+
+## 0.1.0 (May 2024)
+- Bitmap bug fixes
+- Error handling improvements
+
+## 0.0.9 (April 2024)
+- Documentation updates
+- Entrance tile types
+- Emulator subsystem overhaul
+
+## 0.0.8 (February 2024)
+- Hyrule Magic Compression
+- Dungeon Room Entrances
+- PNG Export
+
+## 0.0.7 (January 2024)
+- OverworldEntities
+  - Entrances
+  - Exits
+  - Items
+  - Sprites
+
+## 0.0.6 (November 2023)
+- ScreenEditor DungeonMap
+- Tile16 Editor
+- Canvas updates
+
+## 0.0.5 (November 2023)
+- DungeonEditor
+- DungeonObjectRenderer
+
+## 0.0.4 (November 2023)
+- Tile16Editor
+- GfxGroupEditor
+- Add GfxGroups functions to Rom
+- Add Tile16Editor and GfxGroupEditor to OverworldEditor
+
+## 0.0.3 (October 2023)
+- Emulator subsystem
+  - SNES PPU and PPURegisters