feat(client): localize composer hints and rework input command interaction

Unify the /plan claimed hint with the plan placeholder through a locale
namespace, localize slash menu group titles, replace the PermissionSelect
native select with the Menu primitive, add a goal pause verb chain, clamp
anchored popups to the viewport with scroll-into-view and outside-dismiss,
and fix onPasteUpgrade insertedRange to account for the chip trailing gap.

packages/client/ui-primitives/src/index.ts

@@ -10,6 +10,7 @@ export { Pill } from './Pill.tsx'
 export { Input } from './Input.tsx'
 export { Menu } from './Menu.tsx'
 export type { MenuEntry, MenuItem, MenuSeparator, MenuLabel } from './Menu.tsx'
+export { useAnchoredMaxHeight } from './useAnchoredMaxHeight.ts'
 export { HoverCard } from './HoverCard.tsx'
 export { Modal } from './Modal.tsx'
 export { ConnectionBanner } from './ConnectionBanner.tsx'