v1.3.0: AWG 3.1/3.0/2.0/1.x/WireGuard from the panel, real cascade, server domain, light/dark theme

- client .conf: only obfuscation keys present on the server (AWG 1.x got S3/S4/I1 -> no traffic)
- install.sh no longer puts panel-managed containers into AWG_PROFILES (wrong instance on switch)
- UDP port busy check via docker instead of ss inside the panel container
- default profile never hijacks a managed container

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "amnezia-admin",
-  "version": "1.2.39",
+  "version": "1.3.0",
   "private": false,
   "description": "amnezia_web-PRO — веб-панель AmneziaWG: несколько инстансов, WARP, каскад/Endpoint, экспорт .conf (Docker)",
   "license": "MIT",