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/00group-input/profilepicture/profilepicture.modal.ts

@@ -17,6 +17,7 @@ import '../../dees-windowlayer/dees-windowlayer.js';
 import { DeesWindowLayer } from '../../dees-windowlayer/dees-windowlayer.js';
 import { ImageCropper } from './profilepicture.cropper.js';
 import type { ProfileShape } from './dees-input-profilepicture.js';
+import { themeDefaultStyles } from '../../00theme.js';
 
 @customElement('dees-profilepicture-modal')
 export class ProfilePictureModal extends DeesElement {
@@ -46,8 +47,10 @@ export class ProfilePictureModal extends DeesElement {
   private zIndex: number = 0;
 
   public static styles = [
+    themeDefaultStyles,
     cssManager.defaultStyles,
     css`
+      /* TODO: Migrate hardcoded values to --dees-* CSS variables */
       :host {
         font-family: ${cssGeistFontFamily};
         color: ${cssManager.bdTheme('#333', '#fff')};