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/sessionPicker.tsx

@@ -6,7 +6,9 @@ import type { SessionListItem, SessionListResponse } from '../gatewayTypes.js'
 import { asRpcResult, rpcErrorMessage } from '../lib/rpc.js'
 import type { Theme } from '../theme.js'
 
-function age(ts: number): string {
+const VISIBLE = 15
+
+const age = (ts: number) => {
   const d = (Date.now() / 1000 - ts) / 86400
 
   if (d < 1) {
@@ -20,19 +22,7 @@ function age(ts: number): string {
   return `${Math.floor(d)}d ago`
 }
 
-const VISIBLE = 15
-
-export function SessionPicker({
-  gw,
-  onCancel,
-  onSelect,
-  t
-}: {
-  gw: GatewayClient
-  onCancel: () => void
-  onSelect: (id: string) => void
-  t: Theme
-}) {
+export function SessionPicker({ gw, onCancel, onSelect, t }: SessionPickerProps) {
   const [items, setItems] = useState<SessionListItem[]>([])
   const [err, setErr] = useState('')
   const [sel, setSel] = useState(0)
@@ -107,36 +97,48 @@ export function SessionPicker({
   }
 
   const off = Math.max(0, Math.min(sel - Math.floor(VISIBLE / 2), items.length - VISIBLE))
-  const visible = items.slice(off, off + VISIBLE)
 
   return (
     <Box flexDirection="column">
       <Text bold color={t.color.amber}>
         Resume Session
       </Text>
+
       {off > 0 && <Text color={t.color.dim}> ↑ {off} more</Text>}
-      {visible.map((s, vi) => {
+
+      {items.slice(off, off + VISIBLE).map((s, vi) => {
         const i = off + vi
 
         return (
           <Box key={s.id}>
             <Text color={sel === i ? t.color.label : t.color.dim}>{sel === i ? '▸ ' : '  '}</Text>
+
             <Box width={30}>
               <Text color={sel === i ? t.color.cornsilk : t.color.dim}>
                 {String(i + 1).padStart(2)}. [{s.id}]
               </Text>
             </Box>
+
             <Box width={30}>
               <Text color={t.color.dim}>
                 ({s.message_count} msgs, {age(s.started_at)}, {s.source || 'tui'})
               </Text>
             </Box>
+
             <Text color={sel === i ? t.color.cornsilk : t.color.dim}>{s.title || s.preview || '(untitled)'}</Text>
           </Box>
         )
       })}
+
       {off + VISIBLE < items.length && <Text color={t.color.dim}> ↓ {items.length - off - VISIBLE} more</Text>}
       <Text color={t.color.dim}>↑/↓ select · Enter resume · 1-9 quick · Esc cancel</Text>
     </Box>
   )
 }
+
+interface SessionPickerProps {
+  gw: GatewayClient
+  onCancel: () => void
+  onSelect: (id: string) => void
+  t: Theme
+}