Restore compact Changes diff controls (#1945)

* feat(app): restore compact Changes diff controls

Keep the folder tree behind a view toggle while preserving the flat file list as the default.

Move secondary diff options into the overflow menu so the Changes toolbar stays compact.

* fix(app): mirror whitespace diff option copy

* fix(app): polish diff controls review follow-up

packages/app/src/i18n/resources/pt-BR.ts

@@ -725,7 +725,13 @@ export const ptBR: TranslationResources = {
         tooLarge: "Diff grande demais para exibir",
         unified: "Diff unificado",
         split: "Diff lado a lado",
+        switchToUnified: "Alternar para diff unificado",
+        switchToSplit: "Alternar para diff lado a lado",
+        showTreeView: "Mostrar árvore de pastas",
+        showFlatView: "Mostrar lista plana de arquivos",
+        options: "Opções do diff",
         hideWhitespace: "Ocultar espaços em branco",
+        showWhitespace: "Mostrar espaços em branco",
         scrollLongLines: "Rolar linhas longas",
         wrapLongLines: "Quebrar linhas longas",
         collapseAll: "Recolher todos os arquivos",