v0.1.41 — i18n Internationalization & Settings

Added

• i18n infrastructure with i18next and locale files (en, zh)
• Settings page with language selector, English as default
• All frontend widgets and pages migrated to translation keys
• CLI commands migrated to use translation keys
• Backend error/info messages replaced with English equivalents

Changed

• Navigation labels decoupled from routing keys for i18n flexibility
• 33 audit issues resolved across i18n implementation (DRY, naming,
  structure)

Fixed

• Server static file serving path for web dist directory