fix: AIUI /aiui/ base path, nginx alias cycle, VPN auth, container boot

- AIUI: rebuild with /aiui/ base path (router, chunk loader, SW scope)
- nginx: remove alias from /aiui/ location (caused try_files redirect cycle)
- VPN: WireGuard standalone setup, auth improvements
- ISO: build script hardening, service file updates
- first-boot-containers: networking stack fixes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

demo/aiui/assets/clone-CJT8Sng7.js

@@ -0,0 +1 @@
+import{b as r}from"./_baseUniq-C5dU7AKy.js";var e=4;function a(o){return r(o,e)}export{a as c};