0.3.9 — fix plugin registry (backend HTTPS, CORS), fold updater into a status-bar icon

- Plugin catalog/install failed silently: the webview fetch() to Gitea raw is
  blocked by CORS (no ACAO header). Route registry reads through a new Rust
  command registry_http_get (host-restricted) — catalog + installs now work.
- Updater: removed the floating card that overlapped the Terminal/Log/Updates
  buttons. Update state now shows as a single status-bar download icon (no text):
  idle → download glyph, available → accent + dot, checking/downloading → spinner.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/i18n.ts

@@ -180,6 +180,7 @@ const D: Record<string, Tr> = {
   "Plugins": { ru: "Плагины", de: "Plugins", fr: "Extensions", es: "Plugins" },
   "General": { ru: "Общие", de: "Allgemein", fr: "Général", es: "General" },
   "Check for updates": { ru: "Проверить обновления", de: "Nach Updates suchen", fr: "Vérifier les mises à jour", es: "Buscar actualizaciones" },
+  "Update available — click to install": { ru: "Есть обновление — нажми, чтобы установить", de: "Update verfügbar — zum Installieren klicken", fr: "Mise à jour dispo — cliquez pour installer", es: "Actualización disponible — clic para instalar" },
   "Updates": { ru: "Обновления", de: "Updates", fr: "Mises à jour", es: "Actualizaciones" },
   "Checking for updates…": { ru: "Проверяю обновления…", de: "Suche nach Updates…", fr: "Recherche de mises à jour…", es: "Buscando actualizaciones…" },
   "You're on the latest version": { ru: "У тебя последняя версия", de: "Du hast die neueste Version", fr: "Vous avez la dernière version", es: "Tienes la última versión" },