nautd/webui: scripting, labels, settings, set-location, pause fix

Session checkpoint on webui-plugin:
- engine dump (nautctl dump) + engine endgame integration
- per-file move locations persistence; torrent-level "Set location"
  with reset/keep-relative/leave-separate handling + residual prune
- Lua: naut.get_labels, define_settings/get_setting (script_host struct)
- daemon-owned labels (category+tags) + taxonomy persistence; webui write-through
- fix: pausing a completed/seeding torrent now sticks (stop wins over result)
- automation tab responsive layout; anime_sort label gating + settings

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/integration/run_phase7.sh

@@ -54,7 +54,7 @@ for _ in $(seq 1 100); do
 done
 [[ -n "$port" && "$port" != 0 ]]
 
-"$daemon" --socket "$socket" --plugin "$plugin" \
+"$daemon" --socket "$socket" --plugin "$plugin" --state-dir "$tmp/state" \
     >"$daemon_log" 2>&1 &
 daemon_pid=$!