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.

desktop/src/preload.ts

@@ -0,0 +1,45 @@
+/**
+ * @file Preload script.
+ *
+ * The dashboard runs as standard web content loaded from
+ * `http://127.0.0.1:<port>`. It does not need privileged APIs to function;
+ * keeping this preload empty is intentional and keeps the attack surface
+ * minimal. Renderer-side desktop helpers (e.g. native notification routing)
+ * can be added here later via `contextBridge.exposeInMainWorld` if the
+ * dashboard ever wants to call them.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+/* =============================================================================
+ * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
+ * =============================================================================
+ * **Purpose:** Dashboard module consumed by the React client, MCP tools, or desktop shell depending on deployment mode.
+ *
+ * ## Design constraints
+ * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
+ * - Fail-safe hooks path on the server must never block Claude Code; UI mirrors that
+ *   philosophy by degrading gracefully (empty states, stale badges, reconnect loops).
+ * - Destructive flows stay behind explicit confirmation modals and server-side gates.
+ * - Internationalization: user-visible strings belong in i18n JSON, not literals here.
+ *
+ * ## Remote data & SSH
+ * Remote Data Sources let operators aggregate multiple machines. SSH entries describe
+ * how to reach a peer dashboard; the global data scope (`dataScope.ts`) narrows every
+ * scoped GET via `?sources=`. Health checks and import history surface in Settings.
+ *
+ * ## Observability
+ * Prometheus scrapes `GET /api/metrics` (see `monitoring/`). Grafana ships four
+ * provisioned boards (overview, sessions, tools, alerts). Native npm scripts and
+ * Docker Compose profiles are documented in `monitoring/README.md`.
+ *
+ * ## Testing pointers
+ * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
+ * - Server contract changes require `npm run test:server` and OpenAPI sync.
+ * - MCP edits: `npm run mcp:typecheck` and `npm run mcp:build`.
+ *
+ * ## Related docs
+ * - `ARCHITECTURE.md` — hooks → API → SQLite → WebSocket → UI pipeline.
+ * - `docs/API.md` — REST reference.
+ * - `.claude/skills/file-headers/` — mandatory `@author` header policy.
+ * ============================================================================= */
+
+export {};