fix(tui): share overlay close controls

- add reusable overlay key and help-text helpers for picker-style overlays
- make model, session, skills, and pager hints consistently support Esc/q close behavior

ui-tui/src/components/overlayControls.tsx

@@ -0,0 +1,41 @@
+import { Text, useInput } from '@hermes/ink'
+
+import type { Theme } from '../theme.js'
+
+type TextWrap = 'end' | 'middle' | 'truncate' | 'truncate-end' | 'truncate-middle' | 'wrap' | 'wrap-char' | 'wrap-trim'
+
+export function useOverlayKeys({ disabled = false, onBack, onClose }: OverlayKeysOptions) {
+  useInput((ch, key) => {
+    if (disabled) {
+      return
+    }
+
+    if (ch.toLowerCase() === 'q') {
+      return onClose()
+    }
+
+    if (key.escape) {
+      return onBack ? onBack() : onClose()
+    }
+  })
+}
+
+export function OverlayControls({ children, t, wrap = 'truncate-end' }: OverlayControlsProps) {
+  return (
+    <Text color={t.color.dim} wrap={wrap}>
+      {children}
+    </Text>
+  )
+}
+
+interface OverlayControlsProps {
+  children: string
+  t: Theme
+  wrap?: TextWrap
+}
+
+interface OverlayKeysOptions {
+  disabled?: boolean
+  onBack?: () => void
+  onClose: () => void
+}