Added new calculator with embedded simple tournament

app.py

@@ -2569,5 +2569,50 @@ def set_language(language):
             'message': f'Unsupported language: {language}'
         }), 400
 
+# ── Calculator leaderboard & display settings ────────────────────────────────
+
+CALC_LEADERBOARD_FILE = os.path.join('data', 'calculator_leaderboard.json')
+
+@app.route('/api/calculator/leaderboard', methods=['GET'])
+def get_calculator_leaderboard():
+    try:
+        if os.path.exists(CALC_LEADERBOARD_FILE):
+            with open(CALC_LEADERBOARD_FILE, 'r', encoding='utf-8') as f:
+                return jsonify(json.load(f))
+        return jsonify([])
+    except Exception as e:
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+@app.route('/api/calculator/leaderboard', methods=['POST'])
+def save_calculator_leaderboard():
+    try:
+        data = request.get_json()
+        os.makedirs('data', exist_ok=True)
+        with open(CALC_LEADERBOARD_FILE, 'w', encoding='utf-8') as f:
+            json.dump(data, f, indent=2, ensure_ascii=False)
+        return jsonify({'status': 'success'})
+    except Exception as e:
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+@app.route('/api/calculator/display', methods=['GET'])
+def get_calculator_display():
+    try:
+        settings = load_settings()
+        return jsonify(settings.get('calc_display', {'enabled': False, 'camera': 1}))
+    except Exception as e:
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+@app.route('/api/calculator/display', methods=['POST'])
+def save_calculator_display():
+    try:
+        data = request.get_json()
+        settings = load_settings()
+        settings['calc_display'] = {'enabled': bool(data.get('enabled')), 'camera': int(data.get('camera', 1))}
+        save_settings(settings)
+        return jsonify({'status': 'success'})
+    except Exception as e:
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+
 if __name__ == '__main__':
     app.run(host='0.0.0.0', port=5000, debug=True)