Introduces a Christmas theme that activates in December, including themed colors, subtle background patterns, and snowflake effects on loading screens. Adds a reusable SnowLoader component and utility for December detection. Updates layout and loading components to conditionally apply decorations and styles only during December.
Implemented comprehensive Chromebook-specific fixes including viewport adjustments, enhanced touch and keyboard detection, improved scrolling and keyboard navigation hooks, and extensive CSS optimizations for better usability. Updated chat and dashboard interfaces for larger touch targets, better focus management, and responsive layouts. Added documentation in docs/CHROMEBOOK-FIXES.md and new hooks for Chromebook scroll and keyboard handling.
