Major security update with comprehensive input validation and audio system improvements

• Comprehensive file validation: 10MB size limit, MIME type checking, symlink resolution
• GStreamer pre-validation: Files tested before saving to prevent invalid audio playback
• Audio system error handling with visual-only mode for graceful degradation
• User-friendly alert dialogs with detailed error messages for file rejections
• Safe URI construction preventing path injection vulnerabilities
• Resource limiting: Tap history capped at 100 entries, 60 FPS beat indicator
• Settings debouncing (100ms) to prevent rapid update storms
• Version string sanitization for security
• Runtime path validation with automatic fallback to default sounds
• 5-second timeout for audio file loading with proper error feedback
• Custom sounds properly reset to defaults when toggle disabled
• Enhanced MIME type support (audio/vnd.wave, audio/x-vorbis+ogg, etc.)
• Thread-safe dialog presentation from GStreamer callbacks
• Audio controls auto-disabled in visual-only mode

Manifest repository corrections

• Updated blueprint-compiler source to official GNOME repository
• Fixed dependency URLs for better long-term reliability
• Ensures compatibility with official upstream sources

Runtime and metadata improvements

• Updated runtime version to GNOME 49 for latest platform features
• Enhanced metainfo with additional application metadata items
• Improved compatibility with latest GNOME runtime environment

Build system fixes and AppStream modernization

• Fixed manifest update to only target tempo module, preventing blueprint compiler issues
• Migrated from appdata.xml to metainfo.xml following modern AppStream standards
• Updated build system references to use metainfo naming convention
• Corrected translation file references for new metainfo filename

Major automation overhaul and streamlined release process

• Implemented fully automated Flatpak releases with zero manual intervention
• GitHub Actions now push directly to Flathub main branch (no PR approval needed)
• Replaced alert dialog with integrated about dialog for "What's New" feature
• Added automatic about dialog navigation with tab+enter simulation
• Simplified keyboard shortcuts dialog by removing blue card styling
• Enhanced release workflow with comprehensive error handling
• Removed unnecessary x-checker-data configuration for cleaner manifests
• Added GSettings-based version tracking to prevent repeated notifications
• Streamlined development workflow with automated tag-based deployments
• Improved user experience with seamless release note integration

Major update with keyboard shortcuts dialog and improved development workflow

• Added comprehensive keyboard shortcuts dialog with all available shortcuts
• Updated menu structure with proper keyboard accelerators
• Implemented configuration system with development mode support
• Enhanced about dialog with release notes, acknowledgments, and comprehensive credits
• Added dynamic resource naming for development builds
• Improved build system with proper app ID handling
• Updated version management system as single source of truth
• Added development flag consistency across all build tools

Fixed time signature denominator functionality

• Time signature denominators now properly affect beat timing
• 4/4, 4/8, 4/2, and 4/16 now have different beat speeds as expected
• Improved beat duration calculation using both numerator and denominator
• Enhanced musical accuracy for practice sessions

Final desktop file validation fixes

• Removed problematic translation keys from desktop file
• Ensured clean desktop file validation for Flathub submission
• Maintained all functionality while fixing translation issues
• Ready for production Flatpak distribution

Validation fixes for Flathub submission

• Fixed AppStream metadata validation errors in release descriptions
• Fixed desktop file validation by adding required non-translated keys
• Corrected release description format to use proper p and ul tags
• Enhanced desktop actions with proper Name entries
• Ensured compliance with desktop file specification

GTK4 API compatibility fixes and portal integration

• Fixed GTK4 API compatibility issues for proper Flatpak building
• Replaced deprecated FileFilter.set_name() with .name property
• Fixed FileDialog parent window reference for proper portal integration
• Implemented secure file picking using desktop portals (no broad filesystem access)
• Replaced non-working surface.set_keep_above() with proper warning
• Fixed window signal connections (realize → map signal)
• Corrected metronome engine property references (is_playing → is_running)
• Enhanced build system compatibility with GNOME runtime 48
• Improved sandbox security with portal-based file access

Complete preferences implementation and enhanced functionality

• Implemented full custom sounds functionality with file chooser
• Added GTK4 FileDialog with support for multiple audio formats (WAV, OGG, MP3, FLAC, AAC)
• Custom sounds toggle now properly shows/hides file picker rows
• Added test playback of selected custom sounds
• Implemented right-click context menu to clear custom sounds
• Fixed tap sensitivity range mismatch between UI and settings schema
• Implemented keep-on-top window functionality using GTK4 surface API
• Added start-on-launch functionality
• Enhanced file validation and error handling for audio files
• All preferences now properly connected to real-time UI updates
• External settings changes are synchronized across application instances

Complete translation support with 7 new languages

• Added comprehensive translations for Portuguese (Brazil and Portugal)
• Added Spanish translation with proper musical terminology
• Added Irish (Gaelic) translation
• Added Māori translation
• Completed Italian translation coverage
• Enhanced Turkish translation completeness
• Updated translation infrastructure and build system
• All UI elements, preferences, and help text now fully translatable

Feature consolidation and stability improvements

• Merged comprehensive improvements from feature branches
• Consolidated Blueprint UI template enhancements
• Integrated custom sound support capabilities
• Improved code organization and maintainability
• Enhanced build system stability

Major update: Complete Vala metronome with comprehensive improvements

• Complete Python to Vala conversion for better performance and integration
• GStreamer audio integration with distinct beat and downbeat sounds
• Blueprint UI templates with modern GTK4/Libadwaita design
• Animated beat indicator with Cairo-based pulse effects and perfect sync
• Comprehensive keyboard shortcuts for full application control
• Enhanced preferences dialog with Audio, Behavior, and Visual settings
• Multi-language support with Italian and Turkish translations
• Improved timing engine with microsecond precision
• Larger beat indicator with dramatic glow effects
• Fixed beat sequence to proper 1-2-3-4 display
• Proper translator credits in about dialog

Enable proper file picker portal integration

• Updated file chooser to use modern Gtk.FileDialog API
• File picker now properly uses desktop environment portals
• Improved security through sandboxed file access
• Removed redundant portal permissions from Flatpak manifest

Clean up version references and fix author information

• Updated all version references to use current version consistently
• Fixed author information to use correct name throughout codebase
• Ensured only metainfo retains version history as intended

Add file picker portal support

• Added proper file picker portal permissions to Flatpak manifest
• Improved security by using sandboxed file access
• Enhanced compatibility with desktop file managers

Fix desktop file executable reference

• Fixed desktop file to use correct executable name 'tempo' instead of application ID
• Resolved application launch issues from desktop environment
• Improved desktop integration and launcher compatibility

Improved metadata quality for better Flathub presentation

• Streamlined description to be more concise and user-focused
• Enhanced readability following Flathub quality guidelines
• Removed redundant technical details for better clarity

Fix AppStream control redefinition warning

• Removed duplicate keyboard control from recommends section
• Fixed AppStream validation warning about redefined relation items

AppStream metadata validation fixes

• Fixed AppStream validation errors for Flathub submission
• Updated developer information and contact details
• Removed inapplicable metadata fields
• Added proper branding colors

Screenshots and metadata update

• Added application screenshots for better visibility
• Updated metadata with comprehensive visual previews
• Enhanced AppStream information for software centers

Initial release of Tempo metronome

• Precise timing engine with drift compensation
• GTK4 and Libadwaita modern UI
• Customizable tempo and time signatures
• Visual beat indicator with downbeat accents
• Low-latency GStreamer audio
• Tap tempo functionality
• Keyboard shortcuts
• Settings persistence