fix debug draw colors

lib/core/controller/debug.dart

@@ -18,7 +18,7 @@ class _Debug extends StatelessWidget {
           bottom: -60,
           child: Text(
             'ID: ${id.substring(0, 4)}\nGS:(${gs.dx.toInt()},${gs.dy.toInt()})\nSS:(${ss.dx.toInt()},${ss.dy.toInt()})',
-            style: monospaceStyle,
+            style: monospaceStyle(context),
           ),
         ),
       ],

lib/core/render.dart

@@ -94,7 +94,7 @@ class _LazyCanvasState extends State<LazyCanvas> with TickerProviderStateMixin<L
                     left: 16,
                     child: Text(
                       'Offset: ${widget.controller.offset.coord()}\nScale: ${widget.controller.scale.toStringAsFixed(1)}',
-                      style: monospaceStyle,
+                      style: monospaceStyle(context),
                     ),
                   ),
                 ],

lib/utils/styles.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
-final TextStyle monospaceStyle = TextStyle(
+TextStyle monospaceStyle(BuildContext context) => TextStyle(
-  color: Colors.black,
+  color: Theme.of(context).colorScheme.onSurface,
   fontSize: 14,
   fontWeight: FontWeight.bold,
   fontFamily: 'monospace',