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

AppImage/messages/es/common.json

@@ -1825,7 +1825,7 @@
         "enableGotify": "Habilitar Gotify",
         "serverUrl": "URL del servidor",
         "appToken": "Ficha de aplicación",
-        "enableDiscord": "Habilitar discordia",
+        "enableDiscord": "Activar Discord",
         "webhookUrl": "URL de webhook",
         "enableEmail": "Habilitar correo electrónico",
         "smtpHost": "servidor SMTP",
@@ -1839,9 +1839,17 @@
         "toAddresses": "A direcciones (separadas por comas)",
         "subjectPrefix": "Prefijo de asunto",
         "emailHint": "Deje el host SMTP vacío para usar sendmail local. Para Gmail, utilice una contraseña de aplicación.",
-        "enableApprise": "Habilitar información",
+        "enablePushover": "Activar Pushover",
+        "pushoverUserKey": "Clave de usuario o grupo",
+        "pushoverApiToken": "Token API de la aplicación",
+        "pushoverDevice": "Dispositivo",
+        "pushoverSound": "Sonido",
+        "pushoverCriticalPriority": "Prioridad alta para alertas críticas",
+        "pushoverCriticalPriorityDescription": "Las notificaciones CRÍTICAS usan la prioridad alta de Pushover. No se utiliza la prioridad de emergencia.",
+        "pushoverCredentialsHint": "Cree una aplicación en Pushover y copie su token API y la clave de usuario o grupo.",
+        "enableApprise": "Activar Apprise",
         "urlFormats": "+formatos de URL",
-        "appriseUrl": "Informar URL",
+        "appriseUrl": "URL de Apprise",
         "showUrl": "Mostrar URL",
         "hideUrl": "Ocultar URL",
         "appriseDescription": "Una URL permite a Apprise enrutar la notificación al servicio correcto. Ejemplos:",