Show the SealShare version and links on the admin dashboard

A quiet line under the shares card reads "SealShare 2.1.0 · Release
notes · Website · Made by noNameWEB": the release notes link goes to the
installed version's Gitea release, the others to sealshare.nonameweb.ch
and nonameweb.ch, each in a new tab. It is page chrome, not content, so
it is a footer line rather than a card.

The image has neither .git nor CHANGELOG.md, so the version is a
constant in config/app.php, bumped with each release. AppVersionTest
fails while it differs from the newest released heading in
CHANGELOG.md, so a forgotten bump stops CI before the tag's image is
built. CHANGELOG (Unreleased) notes it.

The dashboard screenshots are unchanged: the line sits below their fold.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

resources/views/livewire/admin/admin-dashboard.blade.php

@@ -63,6 +63,14 @@
         </x-stack>
     </x-card>
 
+    {{-- Page chrome, not content, so a quiet line instead of a card: the installed version, its release notes and who makes SealShare. --}}
+    <footer class="md-type-body-sm md-ink-variant md-text-center" data-test="dashboard-about">
+        SealShare {{ $version }}
+        · <a href="https://gitea.nonameweb.ch/noNameWEB/SealShare/releases/tag/v{{ $version }}" target="_blank" rel="noopener" class="md-link md-ink-primary">{{ __('Release notes') }}</a>
+        · <a href="https://sealshare.nonameweb.ch" target="_blank" rel="noopener" class="md-link md-ink-primary">{{ __('Website') }}</a>
+        · {{ __('Made by') }} <a href="https://nonameweb.ch" target="_blank" rel="noopener" class="md-link md-ink-primary">noNameWEB</a>
+    </footer>
+
     <x-modal wire:model="deletingShareId" :title="__('Delete this share?')" icon="delete">
         {{ __('Are you sure you want to delete this share?') }}