refactor(tui): /clean pass across ui-tui — 49 files, −217 LOC

Full codebase pass using the /clean doctrine (KISS/DRY, no one-off
helpers, no variables-used-once, pure functional where natural,
inlined obvious one-liners, killed dead exports, narrowed types,
spaced JSX). All contracts preserved — no RPC method, event name,
or exported type shape changed.

app/ — 15 files, -134 LOC
- inlined 4 one-off helpers (titleCase, isLong, statusToneFrom,
  focusOutside predicate)
- stores to arrow-const style (buildUiState, buildTurnState,
  buildOverlayState plus get/patch/reset triplets)
- functional slash/registry byName map (flatMap over for-loops)
- dropped dead param `live` in cancelOverlayFromCtrlC
- DRY'd duplicate shift() call in scrollWithSelection
- consolidated sections.push calls in /help

components/ — 12 files, -40 LOC
- extracted inline prop types to interfaces at file bottom (13×)
- inlined 6 one-off vars (pctLabel, logoW, heroW, cwd, title, hint)
- promoted HEART_COLORS + OPTS/LABELS to module scope
- JSX sibling spacing across 9 files
- un-shadowed `raw` in textInput
- components/thinking.tsx + components/markdown.tsx untouched
  (structurally load-bearing / edge-case-heavy)

config content domain protocol/ — 8 files, -77 LOC
- tightened 3 regexes (MOUSE_TRACKING, looksLikeSlashCommand,
  hasInterpolation — dropped stateful lastIndex dance)
- dead export ParsedSlashCommand removed
- MODES narrowed to `as const`, `.find(m => m === s)` replaces
  `.includes() ? (as cast) : null`
- fortunes.ts hash via reduce
- fmtDuration ternary chain
- inlined aboveViewport predicate in viewport.ts

hooks/ + lib/ — 9 files, -38 LOC
- ANSI_RE via String.fromCharCode(27) + WS_RE lifted to module
  scope (no more eslint-disable no-control-regex)
- compactPreview/edgePreview/thinkingPreview → ternary arrows
- useCompletion: hoisted pathReplace, moved stale-ref guard earlier
- useInputHistory: dropped useCallback wrapper (append is stable)
- useVirtualHistory: replaced 4× any with unknown + narrow
  MeasuredNode interface + one cast site

root TS — 3 files, -63 LOC
- banner.ts: parseRichMarkup via matchAll instead of exec/lastIndex,
  artWidth via reduce
- gatewayClient.ts: resolvePython candidate list collapse, inlined
  one-branch guards in dispatch/pushLog/drain/request
- types.ts: alpha-sorted ActiveTool / Msg / SudoReq / SecretReq
  members

eslint config
- disabled react-hooks/exhaustive-deps on packages/hermes-ink/**
  (compiled by react/compiler, deps live in $[N] memo arrays that
  eslint can't introspect) and removed the now-orphan in-file
  disable directive in ScrollBox.tsx

fixes (not from the cleaner pass)
- useComposerState: unlinkSync(file) + try/catch → rmSync(file,
  { force: true }) — kills the no-empty lint error and is more
  idiomatic
- useConfigSync: added setBellOnComplete + setVoiceEnabled to the
  two useEffect dep arrays (they're stable React setState setters;
  adding is safe and silences exhaustive-deps)

verification
- npx eslint src/ packages/ → 0 errors, 0 warnings
- npm run type-check → clean
- npm test → 50/50
- npm run build → 394.8kb ink-bundle.js, 11ms esbuild
- pytest tests/tui_gateway/ tests/test_tui_gateway_server.py
  tests/hermes_cli/test_tui_resume_flow.py
  tests/hermes_cli/test_tui_npm_install.py → 57/57

ui-tui/src/components/appLayout.tsx

@@ -24,20 +24,13 @@ const StreamingAssistant = memo(function StreamingAssistant({
   detailsMode,
   progress,
   t
-}: {
-  busy: boolean
-  cols: number
-  compact?: boolean
-  detailsMode: DetailsMode
-  progress: AppLayoutProgressProps
-  t: Theme
-}) {
+}: StreamingAssistantProps) {
   if (!progress.showProgressArea && !progress.showStreamingArea) {
     return null
   }
 
   return (
-    <Box flexDirection="column">
+    <>
       {progress.showProgressArea && (
         <Box flexDirection="column" marginBottom={progress.showStreamingArea ? 1 : 0}>
           <ToolTrail
@@ -67,7 +60,7 @@ const StreamingAssistant = memo(function StreamingAssistant({
           t={t}
         />
       )}
-    </Box>
+    </>
   )
 })
 
@@ -79,15 +72,13 @@ const TranscriptPane = memo(function TranscriptPane({
 }: Pick<AppLayoutProps, 'actions' | 'composer' | 'progress' | 'transcript'>) {
   const ui = useStore($uiState)
 
-  const visibleHistory = transcript.virtualRows.slice(transcript.virtualHistory.start, transcript.virtualHistory.end)
-
   return (
     <>
       <ScrollBox flexDirection="column" flexGrow={1} flexShrink={1} ref={transcript.scrollRef} stickyScroll>
         <Box flexDirection="column" paddingX={1}>
           {transcript.virtualHistory.topSpacer > 0 ? <Box height={transcript.virtualHistory.topSpacer} /> : null}
 
-          {visibleHistory.map(row => (
+          {transcript.virtualRows.slice(transcript.virtualHistory.start, transcript.virtualHistory.end).map(row => (
             <Box flexDirection="column" key={row.key} ref={transcript.virtualHistory.measureRef(row.key)}>
               {row.msg.kind === 'intro' ? (
                 <Box flexDirection="column" paddingTop={1}>
@@ -234,6 +225,7 @@ const ComposerPane = memo(function ComposerPane({
                 placeholder={composer.empty ? PLACEHOLDER : ui.busy ? 'Ctrl+C to interrupt…' : ''}
                 value={composer.input}
               />
+
               <Box position="absolute" right={0}>
                 <GoodVibesHeart t={ui.theme} tick={status.goodVibesTick} />
               </Box>
@@ -267,3 +259,12 @@ export const AppLayout = memo(function AppLayout({
     </AlternateScreen>
   )
 })
+
+interface StreamingAssistantProps {
+  busy: boolean
+  cols: number
+  compact?: boolean
+  detailsMode: DetailsMode
+  progress: AppLayoutProgressProps
+  t: Theme
+}