about and new lib

static/home.html

@@ -86,11 +86,35 @@
         <button id="footer-profile" class="footer-action" type="button">Profile</button>
         <button id="footer-logout" class="footer-action" type="button">Log out</button>
       </div>
-      <span class="home-footer__author">Author: <a href="https://www.linuxiarz.pl"
-          rel="author noopener">@linuxiarz.pl</a></span>
+      <button id="footer-about" class="footer-action home-footer__about" type="button">About</button>
     </div>
   </footer>
 
+  <dialog id="about-dialog" class="app-dialog">
+    <div class="dialog-panel identity-panel about-panel">
+      <button id="close-about" class="modal-close" type="button" aria-label="Close dialog">×</button>
+      <header class="identity-panel__header">
+        <h2>About</h2>
+        <p class="dialog-copy">RustPad project information and licensing.</p>
+      </header>
+      <div class="about-content">
+        <p><strong>Author <br>Mateusz Gruszczynski </strong><br><a href="https://www.linuxiarz.pl" rel="author noopener"
+            target="_blank">@linuxiarz.pl</a></p>
+        <p><strong>Git repository</strong><br><a href="https://git.linuxiarz.pl/gru/rustpad" rel="noopener"
+            target="_blank">https://git.linuxiarz.pl/gru/rustpad</a></p>
+        <div class="about-license">
+          <strong>Licence</strong>
+          <p>Copyright (C) 2026 Mateusz Gruszczyński @linuxiarz.pl</p>
+          <p>This program is free software: you can redistribute it and/or modify it under the terms of the GNU General
+            Public License as published by the Free Software Foundation, either version 3 of the License.</p>
+          <p><strong>COMMERCIAL LICENSE NOTICE:</strong> Commercial use in proprietary applications (including by
+            linuxiarz.pl Mateusz Gruszczyński) is not permitted under GPLv3 without an explicit Commercial License
+            Agreement. <br>Contact: linuxiarz&lt;at&gt;linuxiarz.pl</p>
+        </div>
+      </div>
+    </div>
+  </dialog>
+
   <dialog id="identity-dialog" class="app-dialog">
     <form id="identity-form" autocomplete="on" class="dialog-panel identity-panel">
       <button id="close-identity" class="modal-close" type="button" aria-label="Close dialog">×</button>