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UI: - Add persistent sidebar (210px) with band switcher dropdown, Library/Player/Settings nav, user avatar row, and sign-out button - Align design system CSS vars to CLAUDE.md spec (#0f0f12 bg, #e8a22a amber accent, rgba borders/text) - Remove light mode toggle (no light mode in v1) - Homepage auto-redirects to first band; shows create-band form only when no bands exist - Strip full-page wrappers from all pages (shell owns layout) - Remove debug console.log statements from SongPage Bug fixes: - nginx: trailing slash on `location ^~ /api/v1/bands/` caused 301 redirect on POST, dropping the request body — removed trailing slash - API: _member_from_request (used by nc-scan stream) only accepted Bearer token, not httpOnly cookie — add rh_token cookie fallback - API: internal_secret config field now has a dev default so the service starts without INTERNAL_SECRET env var set Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>