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/pt/common.json

@@ -1839,9 +1839,17 @@
         "toAddresses": "Para endereços (separados por vírgula)",
         "subjectPrefix": "Prefixo do assunto",
         "emailHint": "Deixe o host SMTP vazio para usar o sendmail local. Para Gmail, use uma senha de aplicativo.",
-        "enableApprise": "Habilitar informar",
+        "enablePushover": "Ativar Pushover",
+        "pushoverUserKey": "Chave de utilizador ou grupo",
+        "pushoverApiToken": "Token API da aplicação",
+        "pushoverDevice": "Dispositivo",
+        "pushoverSound": "Som",
+        "pushoverCriticalPriority": "Prioridade alta para alertas críticos",
+        "pushoverCriticalPriorityDescription": "As notificações CRÍTICAS usam a prioridade alta do Pushover. A prioridade de emergência não é utilizada.",
+        "pushoverCredentialsHint": "Crie uma aplicação no Pushover e copie o respetivo token API e a chave de utilizador ou grupo.",
+        "enableApprise": "Ativar Apprise",
         "urlFormats": "+Formatos de URL",
-        "appriseUrl": "Informar URL",
+        "appriseUrl": "URL do Apprise",
         "showUrl": "Mostrar URL",
         "hideUrl": "Ocultar URL",
         "appriseDescription": "Um URL permite que o Apprise encaminhe a notificação para o serviço certo. Exemplos:",