fix: orchestrator button + Pi SDK session error

- Move leftSidebarMode from URL state to local useState in unified-shell,
    avoiding force-dynamic router round-trip that made the button appear broken                                           - Replace fileURLToPath(new URL(..., import.meta.url)) with process.cwd()
    in bb-pi-bootstrap.ts — import.meta.url is a webpack:// URL in Next.js,
    causing cross-realm TypeError when passed to Node.js fileURLToPath()

package.json

@@ -19,6 +19,9 @@
     "video:thumbnail": "remotion still src/video/index.ts Main out/thumbnail.png --frame=60"
   },
   "dependencies": {
+    "@mariozechner/pi-agent-core": "^0.57.1",
+    "@mariozechner/pi-ai": "^0.57.1",
+    "@mariozechner/pi-coding-agent": "^0.57.1",
     "@radix-ui/react-avatar": "^1.1.11",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
@@ -32,6 +35,7 @@
     "@remotion/google-fonts": "^4.0.422",
     "@remotion/tailwind": "^4.0.422",
     "@remotion/zod-types": "^4.0.422",
+    "@sinclair/typebox": "^0.34.48",
     "@xyflow/react": "^12.10.0",
     "chokidar": "^5.0.0",
     "class-variance-authority": "^0.7.1",