feat(theme,interfaces): Introduce a global theming system and unify menu/tab interfaces; migrate components to use themeDefaultStyles and update APIs accordingly

ts_web/elements/interfaces/secondarymenu.ts

@@ -1,20 +0,0 @@
-/**
- * Interface for individual menu items in the secondary menu
- */
-export interface ISecondaryMenuItem {
-  key: string;
-  iconName?: string;
-  action: () => void;
-  badge?: string | number;
-  badgeVariant?: 'default' | 'success' | 'warning' | 'error';
-}
-
-/**
- * Interface for collapsible groups in the secondary menu
- */
-export interface ISecondaryMenuGroup {
-  name: string;
-  items: ISecondaryMenuItem[];
-  collapsed?: boolean;
-  iconName?: string;
-}