review(tui): route cursorLayout through @hermes/ink wrapAnsi shim (Bun runtime parity)

Copilot caught an important runtime parity gap on PR #27489: the fix
imported the npm `wrap-ansi` package directly, but Ink's `<Text
wrap="wrap">` uses a runtime-selecting shim
(`ui-tui/packages/hermes-ink/src/ink/wrapAnsi.ts`) that prefers
`Bun.wrapAnsi` when running under Bun and falls back to the npm package
elsewhere. So under Bun, Ink would render via `Bun.wrapAnsi` while
`cursorLayout` would compute breaks via the npm package — any
disagreement reintroduces the exact cursor-drift symptom the PR is
meant to eliminate.

Fix:

- Export `wrapAnsi` from `@hermes/ink` (`packages/hermes-ink/src/entry-exports.ts`
  and `packages/hermes-ink/index.d.ts`) so the shim is the public surface.
- Switch `ui-tui/src/lib/inputMetrics.ts` from `import wrapAnsi from
  'wrap-ansi'` to `import { wrapAnsi } from '@hermes/ink'`. Both
  renderer (Ink) and cursor layout now traverse the same shim, so
  they share the runtime-selected implementation by construction.
- Same swap in `textInputWrap.test.ts` and `cursorDriftRegression.test.ts`
  — tests now assert parity through the shim, which means under Bun
  they actually exercise Bun's implementation instead of asserting a
  tautology against the npm package.
- Drop the direct `"wrap-ansi": "^9.0.0"` from `ui-tui/package.json`.
  `@hermes/ink` (which IS a declared dep) pulls wrap-ansi in
  transitively — that's not a phantom dep because the import path
  goes through `@hermes/ink`'s public exports, not through a
  hoisting accident.

Verified: 791/791 vitest tests pass. `@hermes/ink` rebuilt
(`dist/entry-exports.js` includes `wrapAnsi` export). TUI bundle
rebuilt clean.

ui-tui/package-lock.json

@@ -14,8 +14,7 @@
         "ink-text-input": "^6.0.0",
         "nanostores": "^1.2.0",
         "react": "^19.2.4",
-        "unicode-animations": "^1.0.3",
-        "wrap-ansi": "^9.0.0"
+        "unicode-animations": "^1.0.3"
       },
       "devDependencies": {
         "@babel/cli": "^7.28.6",

ui-tui/package.json

@@ -22,8 +22,7 @@
     "ink-text-input": "^6.0.0",
     "nanostores": "^1.2.0",
     "react": "^19.2.4",
-    "unicode-animations": "^1.0.3",
-    "wrap-ansi": "^9.0.0"
+    "unicode-animations": "^1.0.3"
   },
   "devDependencies": {
     "@babel/cli": "^7.28.6",

ui-tui/packages/hermes-ink/index.d.ts

@@ -34,5 +34,6 @@ export { default as measureElement } from './src/ink/measure-element.ts'
 export { createRoot, forceRedraw, default as render, renderSync } from './src/ink/root.ts'
 export type { Instance, RenderOptions, Root } from './src/ink/root.ts'
 export { stringWidth } from './src/ink/stringWidth.ts'
+export { wrapAnsi } from './src/ink/wrapAnsi.ts'
 export { default as TextInput, UncontrolledTextInput } from 'ink-text-input'
 export type { Props as TextInputProps } from 'ink-text-input'

ui-tui/packages/hermes-ink/src/entry-exports.ts

@@ -26,5 +26,6 @@ export { default as measureElement } from './ink/measure-element.js'
 export { scrollFastPathStats, type ScrollFastPathStats } from './ink/render-node-to-output.js'
 export { createRoot, forceRedraw, default as render, renderSync } from './ink/root.js'
 export { stringWidth } from './ink/stringWidth.js'
+export { wrapAnsi } from './ink/wrapAnsi.js'
 export { isXtermJs } from './ink/terminal.js'
 export { default as TextInput, UncontrolledTextInput } from 'ink-text-input'

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

@@ -21,8 +21,8 @@
  * the end-of-text position that wrap-ansi would render. Any future
  * regression that lets the two diverge re-introduces the drift.
  */
+import { wrapAnsi } from '@hermes/ink'
 import { describe, expect, it } from 'vitest'
-import wrapAnsi from 'wrap-ansi'
 
 import { cursorLayout, inputVisualHeight } from '../lib/inputMetrics.js'
 

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

@@ -1,5 +1,5 @@
+import { wrapAnsi } from '@hermes/ink'
 import { describe, expect, it } from 'vitest'
-import wrapAnsi from 'wrap-ansi'
 
 import { offsetFromPosition } from '../components/textInput.js'
 import { composerPromptWidth, cursorLayout, inputVisualHeight, stableComposerColumns } from '../lib/inputMetrics.js'

ui-tui/src/lib/inputMetrics.ts

@@ -1,5 +1,4 @@
-import { stringWidth } from '@hermes/ink'
-import wrapAnsi from 'wrap-ansi'
+import { stringWidth, wrapAnsi } from '@hermes/ink'
 
 import type { Role } from '../types.js'