feat: harden code queue runtime UX

- add queue merge controls and no-cache overview loading\n- improve runtime probes, judge retries, and task trace rendering\n- extend CLI/E2E/docs coverage for code queue and user services

scripts/cli.ts

@@ -46,7 +46,7 @@ function help(): unknown {
       { command: "schedule upsert-pgdata-backup [--time HH:MM] [--remote-base /SERVER_DATA/UNIDESK_PG_DATA]", description: "Create or update the daily PGDATA physical backup task that uploads monthly rotated archives to Baidu Netdisk." },
       { command: "codex task <taskId> [--trace --tail|--from-start|--after-seq N|--before-seq N --limit N] [--full]", description: "Fetch a compact Code Queue task summary; trace rows are opt-in and paged with next/previous commands to avoid output explosion." },
       { command: "codex output <taskId> [--tail|--from-start|--after-seq N|--before-seq N --limit N] [--full-text]", description: "Fetch paged raw Code Queue output records by seq when a trace row has omitted command/output text." },
-      { command: "codex (queues | queue create <queueId> | move <taskId> --queue <queueId>)", description: "List/create Code Queue lanes and move a queued task so each queue runs serially while queues run in parallel." },
+      { command: "codex (queues | queue create <queueId> | queue merge <sourceQueueId> --into <targetQueueId> | move <taskId> --queue <queueId>)", description: "List/create/merge Code Queue lanes and move a queued task; merge preserves task queue time order and keeps source queue records." },
       { command: "job list", description: "List async jobs from .state/jobs." },
       { command: "job status <jobId|latest> [--tail-bytes N]", description: "Show job state with bounded stdout/stderr tails." },
       { command: "debug health", description: "Probe internal core, nodes, system/Docker status, frontend, provider ingress, and public boundary." },