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.

client/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "agent-dashboard-client",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@fontsource/inter": "^5.2.8",
+    "@fontsource/jetbrains-mono": "^5.2.8",
+    "d3": "^7.9.0",
+    "d3-sankey": "^0.12.3",
+    "i18next": "^26.0.8",
+    "i18next-browser-languagedetector": "^8.2.1",
+    "lucide-react": "^0.474.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-i18next": "^17.0.4",
+    "react-router-dom": "^6.28.2"
+  },
+  "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/d3": "^7.4.3",
+    "@types/d3-sankey": "^0.12.5",
+    "@types/react": "^18.3.18",
+    "@types/react-dom": "^18.3.5",
+    "@vitejs/plugin-react": "^4.3.4",
+    "autoprefixer": "^10.4.20",
+    "jsdom": "^27.0.1",
+    "postcss": "^8.5.1",
+    "tailwindcss": "^3.4.17",
+    "typescript": "^5.7.3",
+    "vite": "^6.1.0",
+    "vitest": "^3.2.4"
+  }
+}