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/repo-onboarding/references/module-map.md

@@ -0,0 +1,9 @@
+# Module Map
+
+- `server/index.js`: app startup and route mounting.
+- `server/routes/*.js`: API contracts and route behavior.
+- `server/db.js`: schema and statement layer.
+- `server/websocket.js`: live update broadcast path.
+- `client/src/pages/`: route-level UI.
+- `client/src/components/`: reusable UI primitives.
+- `mcp/src/tools/domains/`: MCP tool families.