- add grammar checker to index and sidebar

Author: TobiasMue91

index.html

@@ -1540,6 +1540,13 @@ <h2>Online Music Player</h2>
             <p>A feature-rich online music player with playlist support, visualizer, and more.</p>
         </a>
     </div>
+    <div class="game-card">
+        <a href="tools/grammar_check.html">
+            <img src="screenshots/screenshot_150.png" alt="AI Grammar Checker" loading="lazy">
+            <h2>AI Grammar Checker</h2>
+            <p>AI-powered grammar checker that suggests corrections, keeps track of changes, and provides detailed explanations for each detected error in your text.</p>
+        </a>
+    </div>
     <!-- end -->
 </div>
 <div class="footer">

screenshots/screenshot_150.png

@@ -236,6 +236,7 @@ <h2>Tools by ChatGPT</h2>
       <li><a href="/tools/fractal_viewer.html">Fractal Viewer</a></li>
       <li><a href="/tools/online_music_player.html">Online Music Player</a></li>
       <li><a href="/games/living_rps.html">Living RPS</a></li>
+      <li><a href="/tools/grammar_check.html">AI Grammar Checker</a></li>
 <!-- end -->
     </ul>
   </div>