refine post-install and hardware GPU docs, Monitor UX and CLI styling

- rewrite the 15 post-install pages and the 3 hardware GPU pages so they reflect the current scripts (reversibility, tracked-tool counts, kernel parameters, per-tool commands, Alpine LXC propagation flow)
- migrate the legacy step-badge helper on post-install/optional and create-vm/synology to the canonical pill component, with the stepLabel key added in each locale
- fix rich-text i18n calls missing helpers across network, automated, optional, security, customization and the post-install landing pages, and escape the `<iface>` placeholder in automated so intl no longer parses it as a tag
- remove the mouse-follow blue overlay from the docs landing layout
- reposition the App-tab Edit button and stack the Search and Register controls vertically on mobile
- move the Bulk update Configure/Edit control into the section header so it behaves the same on desktop and mobile
- show a spinner during the final autoremove/autoclean pass of update-pve-safe so the cleanup step reads as active instead of silent
- restyle the shell spinner and msg_info in a distinctive purple and drop the unused msg_lang duplicate
- add a web-docs i18n build script and its CI workflow, plus tests for the pushover notification channel

web/messages/sk/docs/monitor/dashboard/vms-lxcs-updates.json

@@ -25,6 +25,7 @@
   "mechanisms": {
     "heading": "Výber metódy aktualizácie",
     "lead": "Integrovaná cesta Proxmox VE Helper-Scripts používa oficiálny mechanizmus <helper>update-apps</helper>. Ostatné inštalácie používajú príslušnú metódu balíkov, Dockeru alebo vlastného príkazu.",
+    "officialReference": "Oficiálna referencia: <helper>dokumentácia update-apps od Proxmox VE Helper-Scripts</helper> opisuje interaktívny aj bezobslužný režim, zálohy, simuláciu, dočasné prostriedky na zostavenie, protokoly a návratové kódy.",
     "colSource": "Zdroj",
     "colAction": "Zobrazená akcia",
     "colNotes": "Čo sa spustí",