fix(tui): stabilize live todo progress

ui-tui/src/__tests__/turnStore.test.ts

@@ -0,0 +1,60 @@
+import { beforeEach, describe, expect, it } from 'vitest'
+
+import {
+  appendTurnSegment,
+  archiveDoneTodos,
+  getTurnState,
+  patchTurnState,
+  resetTurnState,
+  toggleTodoCollapsed
+} from '../app/turnStore.js'
+
+describe('turnStore live progress helpers', () => {
+  beforeEach(() => resetTurnState())
+
+  it('archives completed todos into a transcript trail and clears the live anchor', () => {
+    patchTurnState({
+      todos: [
+        { content: 'prep', id: 'prep', status: 'completed' },
+        { content: 'serve', id: 'serve', status: 'completed' }
+      ]
+    })
+
+    expect(archiveDoneTodos()).toEqual([
+      {
+        kind: 'trail',
+        role: 'system',
+        text: '',
+        todos: [
+          { content: 'prep', id: 'prep', status: 'completed' },
+          { content: 'serve', id: 'serve', status: 'completed' }
+        ]
+      }
+    ])
+    expect(getTurnState().todos).toEqual([])
+  })
+
+  it('does not archive active todos', () => {
+    patchTurnState({ todos: [{ content: 'cook', id: 'cook', status: 'in_progress' }] })
+
+    expect(archiveDoneTodos()).toEqual([])
+    expect(getTurnState().todos).toHaveLength(1)
+  })
+
+  it('tracks collapsed state independently of todo content', () => {
+    toggleTodoCollapsed()
+    expect(getTurnState().todoCollapsed).toBe(true)
+
+    toggleTodoCollapsed()
+    expect(getTurnState().todoCollapsed).toBe(false)
+  })
+
+  it('merges adjacent live tool shelves before rendering', () => {
+    appendTurnSegment({ kind: 'trail', role: 'system', text: '', tools: ['one ✓'] })
+    appendTurnSegment({ kind: 'trail', role: 'system', text: '', tools: ['two ✓'] })
+
+    expect(getTurnState().streamSegments).toEqual([
+      { kind: 'trail', role: 'system', text: '', tools: ['one ✓', 'two ✓'] }
+    ])
+  })
+})