Backend keeps every guest's modal payload (details, backups, apps, schedule, mount points) warm in-memory and exposes them through a single `/api/vms/modal-cache-all` endpoint. The dashboard hydrates its entire modal cache from that one request on page load, so opening any guest — first click or after coming back later — renders instantly. Replaces ~84 per-guest fetches with 1.
Localize runtime labels for SMART/NVMe details, backup target badges, firewall interface types, settings units, and generated health status copy while keeping the English and Slovak catalogs in key parity.
Move Monitor dashboard UI copy into translation keys and expand the English source catalog across the main pages, modals, and shared AppImage components.
Add the Monitor dashboard i18n provider, supported language metadata, message catalogs, fallback behavior, and the initial language selector/wiring for the AppImage UI.