refactor: remove aborted status banner from chat UI

Removes the transient aborted banner from the composer status area
Simplifies status row rendering to focus on working state and pending changes
Cleans up unused abort-status localization strings

packages/ui/src/lib/i18n/messages/pt-BR.ts

@@ -2062,7 +2062,6 @@ export const dict: Record<I18nKey, string> = {
   "chat.statusRow.tasksTitle": "Tarefas",
   "chat.statusRow.modelStatus": "{model} · {status}",
   "chat.statusRow.summary.activeLeft": "{active} ativas · {left} restantes",
-  "chat.statusRow.aborted": "Interrompido",
   "chat.revertIndicator.redo": "Refazer",
   "chat.revertIndicator.redoAria": "Refazer — restaurar mensagens revertidas",
   "chat.revertPopover.title": "Revertidas",