fix(tui): clear Apple Terminal resize artifacts

Use a deeper alt-screen clear for Apple Terminal resize repaints so host reflow artifacts do not survive the recovery frame.

ui-tui/packages/hermes-ink/src/ink/terminal.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest'
+
+import { needsAltScreenResizeScrollbackClear } from './terminal.js'
+
+describe('terminal resize quirks', () => {
+  it('uses a deeper alt-screen resize clear for Apple Terminal', () => {
+    expect(needsAltScreenResizeScrollbackClear({ TERM_PROGRAM: 'Apple_Terminal' })).toBe(true)
+    expect(needsAltScreenResizeScrollbackClear({ TERM_PROGRAM: ' Apple_Terminal ' })).toBe(true)
+  })
+
+  it('keeps the normal resize repaint path for modern terminals', () => {
+    expect(needsAltScreenResizeScrollbackClear({ TERM_PROGRAM: 'vscode' })).toBe(false)
+    expect(needsAltScreenResizeScrollbackClear({ TERM_PROGRAM: 'iTerm.app' })).toBe(false)
+  })
+})