Added theme, reworked UI

lib/pages/stats/widgets/profit_indicator.dart

@@ -13,7 +13,7 @@ class ProfitIndicator extends StatelessWidget {
       margin: const EdgeInsets.fromLTRB(0, 0, 20, 0),
       padding: const EdgeInsets.fromLTRB(10, 5, 10, 5),
       decoration: BoxDecoration(
-        color: Colors.blue,
+        color: Theme.of(context).colorScheme.primaryContainer,
         borderRadius: BorderRadius.circular(5)
       ),
       child: Text(
@@ -22,7 +22,7 @@ class ProfitIndicator extends StatelessWidget {
           fontFamily: 'NovaMono',
           fontSize: 20,
           fontWeight: FontWeight.w500,
-          color: profit > 0 ? const Color.fromARGB(255, 0, 255, 8) : Colors.red
+          color: profit > 0 ? Theme.of(context).colorScheme.primary : Theme.of(context).colorScheme.error
         ),
       )
     );