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/components/mouse-move-effect.tsx

@@ -1,29 +0,0 @@
-"use client"
-
-import { useEffect, useState } from "react"
-
-export default function MouseMoveEffect() {
-  const [mousePosition, setMousePosition] = useState({ x: 0, y: 0 })
-
-  useEffect(() => {
-    const handleMouseMove = (event: MouseEvent) => {
-      setMousePosition({ x: event.clientX, y: event.clientY })
-    }
-
-    window.addEventListener("mousemove", handleMouseMove)
-
-    return () => {
-      window.removeEventListener("mousemove", handleMouseMove)
-    }
-  }, [])
-
-  return (
-    <div
-      className="pointer-events-none fixed inset-0 z-30 transition-opacity duration-300"
-      style={{
-        background: `radial-gradient(600px at ${mousePosition.x}px ${mousePosition.y}px, rgba(29, 78, 216, 0.15), transparent 80%)`,
-      }}
-    />
-  )
-}
-