- add flashcard creator to games.json and sidebar.html, add screenshot

Author: TobiasMue91

data/tools.json

@@ -1615,5 +1615,16 @@
     "aiPowered": false,
     "featured": false,
     "date": "2025-06-19"
+  },
+  {
+    "id": "flashcard_creator",
+    "title": "Flashcard Creator",
+    "description": "Free online flashcard creator and study tool. Create, organize, and study digital flashcards with advanced features like difficulty rating, progress tracking, and study analytics. Perfect for students, language learning, and exam preparation.",
+    "url": "tools/flashcard_creator.html",
+    "screenshot": "screenshots/screenshot_210.webp",
+    "type": "tool",
+    "aiPowered": false,
+    "featured": false,
+    "date": "2025-06-20"
   }
 ]

screenshots/screenshot_210.webp

@@ -295,6 +295,7 @@ <h2>Tools by ChatGPT</h2>
       <li><a href="/tools/sudoku_solver.html">Sudoku Solver</a></li>
       <li><a href="/tools/decision_wheel.html">Decision Wheel</a></li>
       <li><a href="/games/reversi.html">Reversi</a></li>
+      <li><a href="/tools/flashcard_creator.html">Flashcard Creator</a></li>
 <!-- end -->
     </ul>
   </div>