chore(tui): remove dead branch cleanup code

- drop unused TUI helpers, test-only layout scaffolding, and stale public debug exports
- remove an unused profiler import and trim test-only coverage for deleted helpers

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

@@ -1,7 +1,7 @@
 export { default as useStderr } from './hooks/use-stderr.js'
 export { default as useStdout } from './hooks/use-stdout.js'
 export { Ansi } from './ink/Ansi.js'
-export { evictInkCaches, type EvictLevel, type InkCacheSizes, inkCacheSizes } from './ink/cache-eviction.js'
+export { evictInkCaches, type EvictLevel, type InkCacheSizes } from './ink/cache-eviction.js'
 export { AlternateScreen } from './ink/components/AlternateScreen.js'
 export { default as Box } from './ink/components/Box.js'
 export { default as Link } from './ink/components/Link.js'
@@ -22,7 +22,7 @@ export { useTerminalFocus } from './ink/hooks/use-terminal-focus.js'
 export { useTerminalTitle } from './ink/hooks/use-terminal-title.js'
 export { useTerminalViewport } from './ink/hooks/use-terminal-viewport.js'
 export { default as measureElement } from './ink/measure-element.js'
-export { resetScrollFastPathStats, scrollFastPathStats, type ScrollFastPathStats } from './ink/render-node-to-output.js'
+export { scrollFastPathStats, type ScrollFastPathStats } from './ink/render-node-to-output.js'
 export { createRoot, default as render, renderSync } from './ink/root.js'
 export { stringWidth } from './ink/stringWidth.js'
 export { isXtermJs } from './ink/terminal.js'

ui-tui/packages/hermes-ink/src/ink/cache-eviction.ts

@@ -22,7 +22,7 @@ export interface InkCacheSizes {
   wrap: number
 }
 
-export function inkCacheSizes(): InkCacheSizes {
+function inkCacheSizes(): InkCacheSizes {
   return {
     lineWidth: lineWidthCacheSize(),
     slice: sliceCacheSize(),

ui-tui/packages/hermes-ink/src/ink/render-node-to-output.ts

@@ -98,19 +98,6 @@ export const scrollFastPathStats: ScrollFastPathStats = {
   }
 }
 
-export function resetScrollFastPathStats(): void {
-  scrollFastPathStats.captured = 0
-  scrollFastPathStats.taken = 0
-  scrollFastPathStats.declined.noPrevScreen = 0
-  scrollFastPathStats.declined.heightDeltaMismatch = 0
-  scrollFastPathStats.declined.other = 0
-  scrollFastPathStats.lastDeclineReason = undefined
-  scrollFastPathStats.lastHeightDelta = undefined
-  scrollFastPathStats.lastHintDelta = undefined
-  scrollFastPathStats.lastScrollHeight = undefined
-  scrollFastPathStats.lastPrevHeight = undefined
-}
-
 export function getScrollHint(): ScrollHint | null {
   return scrollHint
 }