fix(mac): updater progress UI and skip redundant download

Show update stage in the modal, forward electron-updater progress over IPC,
and install immediately when the build is already cached. Rename window titles to TTRPG - *.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/shared/appBranding.ts

@@ -11,3 +11,21 @@ export function appDisplayNameForLocale(localeTag: string): string {
   if (tag.startsWith('ru')) return APP_DISPLAY_NAME_RU;
   return APP_DISPLAY_NAME_EN;
 }
+
+/** Префикс заголовка окон: `TTRPG - Редактор`. */
+export const APP_WINDOW_BRAND = 'TTRPG';
+
+export type AppWindowKind = 'editor' | 'presentation' | 'control' | 'boot';
+
+const WINDOW_SUFFIX: Record<AppWindowKind, { ru: string; en: string }> = {
+  editor: { ru: 'Редактор', en: 'Editor' },
+  presentation: { ru: 'Презентация', en: 'Presentation' },
+  control: { ru: 'Пульт', en: 'Control' },
+  boot: { ru: 'Загрузка', en: 'Loading' },
+};
+
+export function windowChromeTitle(kind: AppWindowKind, localeTag: string): string {
+  const tag = localeTag.trim().toLowerCase();
+  const suffix = tag.startsWith('ru') ? WINDOW_SUFFIX[kind].ru : WINDOW_SUFFIX[kind].en;
+  return `${APP_WINDOW_BRAND} - ${suffix}`;
+}