Match main site logo style: lowercase 'libnovel' in full brand amber.
Add meta http-equiv refresh fallback for 5xx pages.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add header/footer, LibNovel wordmark, pulsing status indicator, faint
watermark code, and auto-refresh countdown (20s for 502/504, 30s for 503).
Fix two-tone background by setting background on html+body. 404 is static
with no auto-refresh.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add caddy/errors/404.html (matches existing 502/503/504 style)
- Add handle_errors 404 block in Caddyfile
- Add active health checks (5s interval) and lb_try_duration 3s to the
ui reverse_proxy so Caddy detects Watchtower container replacements
quickly and serves the 502 maintenance page instead of a raw error
