centralize the Monitor version and prepare the 1.2.4.2-beta

- centralize the app version in a new `AppImage/lib/version.ts` — the dashboard footer, SMART report footer and release-notes modal all read from a single export, so a future bump only has to touch version.ts, package.json and beta_version.txt
- roll `package.json` and `package-lock.json` to `1.2.4.2-beta` (the lockfile was still stuck on the stale `1.2.2.2-beta` marker)
- move the previous `1.2.4.1-beta` feature list into the modal's historical CHANGELOG under its August 17, 2026 date so navigating "Anterior/Próximo" still walks through the complete history
- write the four new What's New entries for the ongoing 1.2.4.2 cycle: smarter LXC app detection (Docker promoted as parent workload during cold start, unregistered suggestions cached at startup, on-demand catalog scan), end-to-end Docker updates (Engine + per-image tracking on the 24h cycle with a "Check now" action), the 380+ workload detection catalog built from the live community-scripts source, and Pushover joining Telegram/Gotify/Discord/Email/Apprise as a native notification channel
- add the four new i18n keys (appDetection, dockerUpdates, appCatalog, pushover) to all eight bundled locales — en and es curated, the six remaining kept in English until the docs-i18n workflow retranslates them

AppImage/messages/en/common.json

@@ -3117,15 +3117,10 @@
     "gotIt": "Got it!",
     "dontShowAgain": "Don't show again for this version",
     "currentFeatures": {
-      "hostUpdate": "One-click host update from the Health Monitor. The new Update Now button in System Updates runs the Proxmox update flow inside a dashboard terminal, without leaving the browser.",
-      "mobileInstall": "In-app install prompt for mobile. First-time visitors on Android and iOS Safari now see simple steps for adding the Monitor to their home screen as a PWA.",
-      "i18n": "The Monitor now speaks 8 languages: English, Spanish, German, French, Italian, Portuguese, Swedish and Slovak. Huge thanks to @vaso73 for building the i18n scaffolding that made this possible.",
-      "pageSpeed": "Faster page loads and smoother navigation across the dashboard. Overview opens instantly and the VMs & LXCs page never flashes 'Loading…' between guest modals again.",
-      "appTab": "New App tab inside the VM & LXC modal — especially for LXCs. Register the apps installed in a container, capture their weblinks, and get notifications when a new upstream version ships.",
-      "updatesTab": "Reworked Updates tab for LXCs: apply OS packages and registered-app updates from a single button, and schedule a recurring auto-update job that checks the container's OS and its tracked app on every run.",
-      "backupNoTimeout": "Long backup jobs no longer time out. VM and LXC backups launched from the Monitor now run in the background until they naturally finish, so a 30-minute PBS backup completes the same as a 10-second local one.",
-      "vmDiskUsage": "VMs running the QEMU Guest Agent (qemu-guest-agent) now report real used / total disk figures on the dashboard, instead of the '0 GB' that PVE returns for guest-managed filesystems.",
-      "pwaInstall": "First-time visitors on Android and iOS Safari now see an in-app install prompt with clear steps for adding the Monitor to their home screen as a PWA."
+      "appDetection": "Smarter app detection in the App tab: Docker is correctly promoted as the parent workload during cold start (Portainer/SearXNG no longer briefly show up as native apps), unregistered suggestions live in the startup cache, and 'Find applications' runs a fresh catalog-backed scan on demand.",
+      "dockerUpdates": "The Updates tab now covers Docker end-to-end: Docker Engine and per-image update tracking follow the same 24-hour rolling cycle as OS packages, with a 'Check now' action for on-demand digest comparison — no more waiting for the daily collector.",
+      "appCatalog": "New application detection catalog with over 380 tracked workloads, built from the live community-scripts source with independent script evidence. Primary and fallback detectors (file, binary, dpkg, apk, Python, Docker exec, Docker label) cover both new and historical LXC layouts.",
+      "pushover": "Pushover joins Telegram, Gotify, Discord, Email and Apprise as a native notification channel — user/API key, device and sound selectors, priority 0 for regular messages, optional priority 1 for CRITICAL events. Suggested by @benginx (#308)."
     }
   },
   "network": {