Fix critical memory leaks identified in architecture review: Add signal handler disconnection in WebKitNative (load-changed and script-dialog signals now properly cleaned up), implement GTK idle callback cleanup with automatic removal on completion, add dlclose() calls for WebKit library handles, track GTK signal IDs in GtkSkiaSurfaceWidget for proper disposal. Replace empty catch blocks in GestureManager with logged exception handling. Add WebKitNative.Cleanup() and GtkNative.ClearCallbacks() methods for application shutdown.
Split LinuxApplication into Input and Lifecycle partials. Extract SkiaView into Accessibility, Drawing, and Input partials. Split SkiaEntry and SkiaEditor into Drawing and Input partials. Extract TextRenderingHelper from SkiaRenderingEngine. Create dedicated files for SkiaAbsoluteLayout, SkiaGrid, and SkiaStackLayout. This reduces file sizes from 40K+ lines to manageable units organized by responsibility.
Update package references from RC/preview versions to stable 1.0.* across all templates and project files. Mark RC1 roadmap as completed and update documentation to reflect v1.0.0 release. Add GestureManager cleanup in SkiaView.Dispose() to prevent memory leaks. Update copyright years to 2025-2026 and add development artifacts to .gitignore.
Replace 495+ Console.WriteLine debug statements across handlers, dispatching, services, views, and window components with centralized DiagnosticLog service for proper logging infrastructure. Add new DiagnosticLog.cs service with Debug/Error methods to eliminate debug logging pollution in production code.
