theme enhancements

frontend/src/themes/defaults.ts

@@ -25,6 +25,20 @@ export const commonTheme: ThemeOptions = {
     info: {
       main: info
     }
+  },
+  components: {
+    MuiAppBar: {
+      defaultProps: {
+        enableColorOnDark: true
+      }
+    },
+    MuiPaper: {
+      styleOverrides: {
+        root: {
+          backgroundImage: "unset" // The gradient is part of how MUI implements the elevation of the Paper component in dark mode. If you don't want this gradient, you can override it with "unset".
+        }
+      }
+    }
   }
 };