Open Terminal fleet for all accounts + OpenWebUI UAT pass (#610)

open-terminal 0.11.34 bare-metal (human-authorized host install) with a
systemd template unit: reachableceo on tailscale-only :30000 (cwd
~/projects) and all 8 other accounts on :30001-30008, each with its own
key kept out of ps in per-user TOMLs, all users added to the docker group.
Keys live in ~/.creds + /etc/ukrrs/open-terminal, never in this repo.

UAT: throwaway OpenWebUI v0.11.1 (matched to the human's Cloudron prod)
driven purely over its HTTP API against the beta gateway lane - connection
verify/config PASS, direct exec as uid 1001 PASS, and the chat round trip
PASS: the model emitted run_command, we executed it through OpenWebUI's
terminal proxy (server holds the key), and the final answer named 9/9 real
project directories; earlier negative runs prove the test catches
hallucinated output. Ops note OPEN-TERMINAL.md documents production wiring
(prod openwebui container v0.3.10 is too old and needs an upgrade first).

Also tonight: agent-stack relaunchers removed (6-, backups kept) so no
screen/crush sessions auto-start on reboot; 22:00 night-profile flip
observed live; docs synced for the earlier teardown.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2
[#610]

removed-agent-stacks/reachableceo-agent-stack.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=reachableceo PMO/Work agent stack (screen/crush)
+After=local-fs.target network-online.target systemd-user-sessions.service
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+KillMode=process
+TimeoutStartSec=180
+ExecStart=/usr/bin/bash /usr/local/sbin/launch-rceo-stack.sh
+
+[Install]
+WantedBy=multi-user.target