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/en/docs/post-install/performance.json

@@ -25,8 +25,8 @@
     ],
     "replacesTitle": "This replaces a system binary",
     "replacesBody": "Replacing <code>/bin/gzip</code> with a wrapper is unusual. It is safe (the wrapper produces gzip-compatible output), but worth knowing: scripts that hardcode paths, run inside restrictive chroots, or verify binary hashes may behave differently. The original binary is preserved as <code>/bin/gzip.original</code> so you can always swap it back.",
-    "revertTitle": "Not reversible from the Uninstall menu",
-    "revertBody": "This optimization is applied by Customizable, but <strong>does not currently have a matching entry in the Uninstall Optimizations menu</strong>. To revert it by hand, restore the original gzip and clear the wrapper:",
+    "revertTitle": "Reversible from the Uninstall menu",
+    "revertBody": "This optimization is tracked. <link>Uninstall Optimizations</link> restores <code>/bin/gzip.original</code> back into place, removes the <code>pigzwrapper</code>, reverts the two lines added to <code>/etc/vzdump.conf</code>, and runs <code>apt purge pigz</code>. Manual equivalent:",
     "verifyTitle": "Verification",
     "verifyBody": "After applying, <code>gzip --version</code> should mention pigz. A quick benchmark also shows the speed difference on a multi-core host:",
     "whenTitle": "When this matters most",