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.

.claude/skills/mcp-operations/references/host-config.md

@@ -0,0 +1,18 @@
+# MCP Host Config
+
+## Command
+- `node`
+
+## Args
+- Absolute path to `mcp/build/index.js`
+
+## Example env
+- `MCP_DASHBOARD_BASE_URL=http://127.0.0.1:4820`
+- `MCP_DASHBOARD_ALLOW_MUTATIONS=false`
+- `MCP_DASHBOARD_ALLOW_DESTRUCTIVE=false`
+- `MCP_LOG_LEVEL=info`
+
+## Common mistakes
+- Relative path to MCP build entry.
+- Dashboard not running while MCP starts.
+- Mutating tools used while mutation flag is false.