feat: new logo for the Verdant design — dashboard bars on a screen tile ...

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

feat: upgrade to gnexus-ui-kit 1.0, adopt Verdant color theme ...

Kit 0.4.0 → 1.0.0 (git dep pinned to master): rounded panels, softer
accents, tabs as segment switcher, page-header scan animation removed
by the kit itself. Custom overrides dropped where the kit now handles
them (48px topbar brand).

Theme: kit-verdant.css import (exports map only whitelists kit.css in
1.0 — theme file resolved through a vite alias until the kit ships
theme exports). Chart palette rebuilt for Verdant and re-validated
(L 0.48–0.67, chroma, CVD, contrast on #1E2522). Logo/favicon
recolored to the Verdant hues. allow-git=git.gnexus.space in .npmrc
for npm 12 git dependencies.

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

feat: English UI, no-login API, logo/favicon, layout fixes ...

- UI fully translated to English (dashboard, server page, toasts, formatters)
- login removed: GHARD_ADMIN_TOKEN is optional now (unset = open API);
  agent key auth untouched; README/.env.example updated
- SVG logo + favicon (monitor with pulse, kit-style)
- reactivity: dashboard poll 5s, server 5s, history 10s
- layout: metric cards full-row flex, metric value nowrap,
  info/note 50/50 grid, topbar logo 48x48, server card max-width 420px,
  uptime on its own line, delete confirmed via GnConfirmDialog
- docker: ca-certificates for npm git dependency

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