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/docker-compose.yml

@@ -0,0 +1,48 @@
+# Turnkey Prometheus + Grafana stack for the CCAM `/api/metrics` endpoint.
+#
+#   cd monitoring && docker compose up -d
+#   open http://localhost:3000   (admin / admin)
+#
+# The "CCAM — Overview" dashboard and the Prometheus datasource are
+# pre-provisioned, so there is nothing to click after start. Prometheus scrapes
+# the dashboard running on the HOST (a plain `npm start` on :4820) via
+# host.docker.internal — see ./prometheus/prometheus.yml to change the target
+# or add a bearer token when DASHBOARD_TOKEN is set. See ./README.md.
+services:
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: ccam-prometheus
+    restart: unless-stopped
+    command:
+      - --config.file=/etc/prometheus/prometheus.yml
+      - --storage.tsdb.path=/prometheus
+      - --web.enable-lifecycle
+      - --web.console.templates=/etc/prometheus/consoles
+    volumes:
+      - ./prometheus:/etc/prometheus:ro
+      - prometheus-data:/prometheus
+    ports:
+      - "127.0.0.1:9090:9090"
+    # Lets the container reach a CCAM server running on the host (Linux needs the
+    # explicit host-gateway mapping; Docker Desktop resolves it natively).
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+
+  grafana:
+    image: grafana/grafana:latest
+    container_name: ccam-grafana
+    restart: unless-stopped
+    depends_on:
+      - prometheus
+    env_file:
+      - ./grafana.defaults.env
+    volumes:
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
+      - grafana-data:/var/lib/grafana
+    ports:
+      - "127.0.0.1:3000:3000"
+
+volumes:
+  prometheus-data:
+  grafana-data: