feat(i18n): register ja, ro, uk, gl in language switcher

These four locales had translation files but were never wired into i18n
resources or the nezhaLang dropdown, so users could not select them.
Register ja-JP, ro-RO, uk-UA, gl-ES; missing keys fall back to en-US per
the Weblate community-translation workflow.

src/types/settings.ts

@@ -16,6 +16,10 @@ export const nezhaLang: Record<string, string> = {
     "it-IT": "Italiano",
     "fr-FR": "Français",
     "id-ID": "Bahasa Indonesia",
+    "ja-JP": "日本語",
+    "ro-RO": "Română",
+    "uk-UA": "Українська",
+    "gl-ES": "Galego",
 }
 
 export const wafBlockReasons: Record<number, string> = {