Christmas decorations and theme logic have been disabled throughout the app, including the isDecember utility, layout, and related imports. Layout now shows a skeleton UI while mounting to prevent layout shift. Minor improvements to RevenueChart tooltip colors and ChatDetail request headers for better consistency.
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.
