feat(ui): let users hide context rail surfaces

A trailing configure button on the rail — outside the sortable list and the
digit shortcuts — opens a dialog that toggles each surface. The choice is
stored as the hidden set so newly added surfaces appear for everyone, and
the rail and the mod+alt+digit switcher share the same visibility filter, so
badges and shortcuts always agree. Hidden surfaces keep their data and stay
reachable from the command palette.

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

@@ -1140,6 +1140,11 @@ export const dict: Record<I18nKey, string> = {
   "contextPanel.mode.context": "Contexto",
   "contextPanel.mode.preview": "Prévia",
   "contextPanel.mode.browser": "Navegador",
+  "contextRail.configure.open": "Configurar painéis",
+  "contextRail.configure.dialogTitle": "Painéis da barra",
+  "contextRail.configure.dialogDescription": "Escolha quais painéis a barra mostra. Painéis ocultos mantêm seus dados e continuam acessíveis pela paleta de comandos.",
+  "contextRail.configure.showAll": "Mostrar todos",
+  "contextRail.configure.noneWarning": "Todos os painéis estão ocultos.",
   "contextRail.aria.rail": "Superfícies do painel",
   "contextPanel.editorEmpty.title": "Nenhum arquivo aberto",
   "contextPanel.editorEmpty.description": "Escolha um arquivo na árvore para começar a editar.",