fix: container orchestration stability, AIUI inclusion, lnd-ui port, version 1.3.0

Container stability:
- Merge scan results instead of full replacement (prevents UI flapping)
- Absence threshold: 3 consecutive missed scans before removing from state
- container-list RPC uses cached scanner state for consistency
- Increased Podman API timeout 30s → 60s (scanner + health monitor)
- Keep crashed containers visible as "exited" instead of podman rm -f
- Resolve host-gateway IP via ip route (podman 4.3.x compatibility)

ISO build fixes:
- AIUI web app inclusion: searches 5 paths + CI step to copy from build server
- Claude API proxy: systemctl enable with symlink fallback
- AIUI nginx: try_files =404 (was /aiui/index.html redirect loop)
- Build version set to 1.3.0

Container fixes:
- lnd-ui: nginx listens on 8080 (was 80, Permission denied in rootless)
- first-boot: image-versions.sh sourced from correct path with validation
- first-boot: host-gateway resolved to actual gateway IP

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -5,7 +5,7 @@
 Archipelago is a **Bitcoin Node OS** — bootable, self-sovereign personal server. Flash to USB, install on hardware, manage via web UI.
 
 **Stack**: Rust backend + Vue 3 + TypeScript (strict) + Vite 7 + Tailwind + Pinia + Podman on Debian 12
-**Version**: 0.1.0 | **Target**: x86_64 and ARM64
+**Version**: 1.3.0 | **Target**: x86_64 and ARM64
 
 ---