fix(tui): pin todo panel above live output

ui-tui/src/lib/liveLayout.test.ts

@@ -0,0 +1,9 @@
+import { describe, expect, it } from 'vitest'
+
+import { liveTailOrder } from './liveLayout.js'
+
+describe('liveTailOrder', () => {
+  it('keeps todo before transcript and assistant live output', () => {
+    expect(liveTailOrder()).toEqual(['todo', 'history', 'assistant'])
+  })
+})