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.

monitoring/grafana.defaults.env

@@ -0,0 +1,6 @@
+# Default local Grafana credentials — applied on first start (npm or Docker).
+# Shared by monitoring/docker-compose.yml, docker-compose.full.yml, and start.js.
+GF_SECURITY_ADMIN_USER=admin
+GF_SECURITY_ADMIN_PASSWORD=admin
+GF_USERS_ALLOW_SIGN_UP=false
+GF_DASHBOARDS_DEFAULT_HOME_DASHBOARD_UID=ccam-overview