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/repo-onboarding/SKILL.md

@@ -0,0 +1,26 @@
+---
+name: repo-onboarding
+description: Onboard quickly to this repository. Use when asked to understand architecture, locate ownership, choose the right module, or identify the correct commands and verification strategy before coding.
+---
+
+# Repo Onboarding
+
+Use this workflow when a task begins with discovery.
+
+## Steps
+- Read `README.md` and `ARCHITECTURE.md` for system-level context.
+- Identify target layer:
+  - `server/` for API, hooks, DB, websocket
+  - `client/` for UI and routing
+  - `mcp/` for local MCP tools and policy gates
+- Select the smallest set of files required to answer the task.
+- Confirm verification commands before implementation.
+
+## Verification defaults
+- Backend: `npm run test:server`
+- Frontend: `npm run test:client`
+- MCP: `npm run mcp:typecheck` and `npm run mcp:build`
+
+## References
+- Module map: `references/module-map.md`
+- Command map: `references/command-map.md`