Add Mono color theme ...

Plain black with minimal accents: true-gray neutrals, white
primary, a single restrained amber accent, and barely tinted
status colors. Also widen the demo theme switcher regex so
returning from Ember or Mono restores the default stylesheet.

Add Ember color theme ...

Muted warm scheme: faded warm neutrals and paper text, soft
orange as the single expressive accent, status colors pulled
toward the warm range (sage success, brick error, amber
warning, warm-gray info). Third option in the demo switcher.

Add Verdant color theme with demo switcher ...

Palette variables become !default so themes can configure them.
kit-verdant.scss / demo-verdant.scss compile the green-shifted
palette (green-tinted neutrals, mint secondary, lime accent,
teal info) into kit-verdant.css / demo-verdant.css. Both demos
get a fixed theme switch in the corner that swaps the theme
stylesheets and persists the choice. The default Tokyo Night
theme is unchanged.

v0.3.0 — GnUserCard, NavigationShell footer slot, Vue demo partials ...

Features:
- Add GnUserCard Vue component with compact and full variants
- Add GnNavigationShell #footer slot for custom footer content
- Add profile footer demo in navigation-shell section
- Split demo/vue.html into 27 partials under demo/partials/vue/
- Fix toast open animation (nextTick + requestAnimationFrame pattern)

Style:
- Add .user-card and .user-card-compact to _cards.scss
- Add .profile-identity to _navigation-shell.scss

Docs:
- Add demo synchronization rules to CLAUDE.md

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Disable BrowserSync ghostMode and fix login-card sizing ...

- gulpfile.js: add ghostMode: false to stop scroll sync across tabs
- _cards.scss: .card.login-card max-width 460px → max-width: 100%; width: 460px

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Add Vue adapter foundation

Add page header and description list

Modernize Sass build pipeline

Scaffold GNexus UI kit