feat: Claude Code Monitor — lanes, pipelines and a merged workspace

Internal SmartGift build of a Claude Code monitoring dashboard.

Lanes: a durable unit of parallel agent work, one per working directory,
tracked across session restarts. Managed lanes are git worktrees the
dashboard provisions and can reset or remove behind a three-check destroy
guard and a counted preflight; adopted lanes are directories you already
own and are never destroyable.

Pipelines: a lane moves through pipeline stages. A stage the agent declares
with evidence renders green; a stage inferred from the tool-event stream
renders dashed amber and never counts as done. Detection is forward-only
within a 30-minute window, and never writes the declared stage.

Workspace: one page at /run with a lane grid, the selected lane's pipeline,
and a full Claude console behind a disclosure.

.codex/skills/mcp-maintainer/references/tool-domain-map.md

@@ -0,0 +1,8 @@
+# MCP Tool Domain Map
+
+- `observability-tools.ts`: health, stats, analytics, snapshots, export.
+- `session-tools.ts`: list/get/create/update sessions.
+- `agent-tools.ts`: list/get/create/update agents.
+- `event-tools.ts`: event listing and hook ingestion.
+- `pricing-tools.ts`: pricing CRUD and cost calculations.
+- `maintenance-tools.ts`: cleanup, reimport, reinstall hooks, destructive clear.