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()

src/app/api/runtime/events/route.ts

@@ -0,0 +1,16 @@
+import { NextResponse } from 'next/server';
+import { bbDaemon } from '../../../../lib/bb-daemon';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET(request: Request): Promise<Response> {
+  const { searchParams } = new URL(request.url);
+  const projectRoot = searchParams.get('projectRoot');
+
+  if (!projectRoot) {
+    return NextResponse.json({ ok: false, error: 'projectRoot is required' }, { status: 400 });
+  }
+
+  await bbDaemon.ensureRunning();
+  return NextResponse.json({ ok: true, lifecycle: bbDaemon.getLifecycle(), data: bbDaemon.listEvents(projectRoot) });
+}