fix: stale rootfs container cleanup, OnlyOffice/NPM port corrections

ISO build:
- Remove stale archipelago-rootfs-tmp container before creating new one
  (previous failed builds leave it behind, blocking subsequent builds)

Container ports:
- OnlyOffice: fix LAN address from 8044 to 9980 (actual mapped port)
- Nginx Proxy Manager: fix from 8181 to 81 (correct admin port)

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

core/container/src/podman_client.rs

@@ -116,7 +116,7 @@ impl PodmanClient {
             "grafana" => "http://localhost:3000",
             "searxng" => "http://localhost:8888",
             "ollama" => "http://localhost:11434",
-            "onlyoffice" => "http://localhost:8044",
+            "onlyoffice" => "http://localhost:9980",
             "penpot" => "http://localhost:9001",
             "nextcloud" => "http://localhost:8085",
             "vaultwarden" => "http://localhost:8082",
@@ -124,7 +124,7 @@ impl PodmanClient {
             "photoprism" => "http://localhost:2342",
             "immich_server" | "immich" => "http://localhost:2283",
             "filebrowser" => "http://localhost:8083",
-            "nginx-proxy-manager" => "http://localhost:8181",
+            "nginx-proxy-manager" => "http://localhost:81",
             "portainer" => "http://localhost:9000",
             "uptime-kuma" => "http://localhost:3001",
             "fedimint" | "fedimintd" => "http://localhost:8175",