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

.github/scripts/build_translation_cache.py

@@ -16,6 +16,8 @@ from __future__ import annotations
 
 import argparse
 import ast
+import asyncio
+import inspect
 import json
 import os
 import subprocess
@@ -160,7 +162,10 @@ def translate_googletrans(text: str, dest_lang: str, context: str) -> str:
 
     translator = Translator()
     full_text = f"{context} {text}".strip()
-    return translator.translate(full_text, dest=dest_lang).text
+    result = translator.translate(full_text, dest=dest_lang)
+    if inspect.isawaitable(result):
+        result = asyncio.run(result)
+    return result.text
 
 
 def translate_google_web(text: str, dest_lang: str, context: str, timeout: int) -> str: