feat: container orchestration, branding overhaul, onboarding logging
Container orchestration:
- Health monitor with crash recovery and auto-restart
- Doctor service (periodic health checks via systemd timer)
- Reconcile service (desired-state convergence)
- Stack-aware install/uninstall with dependency tracking
Branding:
- Custom GRUB background (designer artwork, 1024x768)
- ISOLINUX boot menu: centered, orange accents, clean labels
- Terminal banners: adaptive width, basic ANSI colors, fits 80-col
- Removed auto-generated splash scripts (designer provides assets)
- GRUB theme: lowercase branding
Frontend:
- 401 handler clears localStorage immediately (prevents cascade)
Backend:
- Onboarding/auth logging ([onboarding] tag in journalctl)
- Cookie Secure flag logging for debugging HTTP/HTTPS issues
ISO fixes:
- Install log saved before unmount (was silently failing)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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