feat: fetch download/install version data client-side instead of at build time

Replace the prestart/prebuild generate-version-data.mjs script with a
useVersionData React hook that fetches live from the public S3 API and
CDN on page load. Release tables and version-specific commands (dd,
gunzip, wget, qm importdisk) now always reflect the current releases
without requiring a redeploy.

- Add src/hooks/useVersionData.ts (ports all fetch/parse/sort logic)
- Add VersionCommand and ImageVerifyCommand exports to DownloadTable
- Remove static versions.json import from download.mdx and install.mdx
- Remove prebuild npm hooks and generate-version-data.mjs
- Remove unused VersionFooter component (dead code since footer refactor)
- Remove productVersion from docusaurus.config.ts customFields

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: gsanchietti

.gitignore

@@ -8,9 +8,6 @@
 /.docusaurus
 .docusaurus
 
-# Generated at build time by scripts/generate-version-data.mjs
-/src/data/versions.json
-
 # Misc
 .DS_Store
 .env.local

docs/administrator-manual/installation/download.mdx

@@ -3,8 +3,7 @@ title: Download
 sidebar_position: 2
 ---
 
-import versions from '@site/src/data/versions.json';
-import {StableReleases, DevReleases} from '@site/src/components/DownloadTable';
+import {StableReleases, DevReleases, ImageVerifyCommand} from '@site/src/components/DownloadTable';
 
 # Download {#download-section}
 
@@ -18,7 +17,7 @@ Begin by downloading the most recent x86_64 image from the table below.
 
 For verification, download also the hash file and execute the following command in a Linux shell to ensure the integrity of the downloaded image:
 
-<pre><code>{`grep ${versions.image} sha256sums | sha256sum -c`}</code></pre>
+<ImageVerifyCommand />
 
 To proceed with the installation of NethSecurity, you have two options: write the downloaded image directly to your disk or create a bootable USB stick. Refer to the [installation](./install.mdx) page for detailed instructions on both methods.
 

docs/administrator-manual/installation/install.mdx

@@ -3,7 +3,7 @@ title: Installation
 sidebar_position: 3
 ---
 
-import versions from '@site/src/data/versions.json';
+import {VersionCommand} from '@site/src/components/DownloadTable';
 
 # Installation {#install-section}
 
@@ -22,7 +22,7 @@ NethSecurity can be run from a USB stick or installed directly to any bootable d
 2.  find the disk/stick/card device name, in this example the device is named `/dev/sdd`
 3.  as `root` user, write the downloaded image to the device:
 
-    <pre><code>{`zcat ${versions.image} | dd of=/dev/sdd bs=1M iflag=fullblock status=progress oflag=direct`}</code></pre>
+    <VersionCommand template={(v) => `zcat ${v.image} | dd of=/dev/sdd bs=1M iflag=fullblock status=progress oflag=direct`} />
 
 4.  unplug the disk/stick/card from the desktop and plug it into the server
 5.  boot the server, select the correct device (USB, SD card or hard disk) from boot menu
@@ -64,7 +64,7 @@ You can use the downloaded image as a virtual machine disk:
 
 1.  extract the downloaded image:
 
-    <pre><code>{`gunzip ${versions.image}`}</code></pre>
+    <VersionCommand template={(v) => `gunzip ${v.image}`} />
 
 2.  create a new virtual machine and select the uncompressed image as disk
 3.  boot the virtual machine
@@ -89,15 +89,15 @@ qm create 401 --name "NethSecurity" --ostype l26 --cores 1 --memory 1024 --net0
 
 Download the image:
 
-<pre><code>{`wget '${versions.downloadUrl}'`}</code></pre>
+<VersionCommand template={(v) => `wget '${v.downloadUrl}'`} />
 
 Extract the image:
 
-<pre><code>{`gunzip ${versions.image}`}</code></pre>
+<VersionCommand template={(v) => `gunzip ${v.image}`} />
 
 Import the extracted image as a virtual machine disk:
 
-<pre><code>{`qm importdisk 401 ${versions.imageNoGz} local-lvm`}</code></pre>
+<VersionCommand template={(v) => `qm importdisk 401 ${v.imageNoGz} local-lvm`} />
 
 Attach the disk to the virtual machine: