fix(toolbar): add bg for md light

Author: thetaPC

core/src/themes/md/light.tokens.ts

@@ -31,6 +31,7 @@ export const lightTheme: LightTheme = {
       borderColor: 'var(--ion-tab-bar-border-color, var(--ion-border-color, rgba(0, 0, 0, 0.07)))',
     },
     IonToolbar: {
+      bg: 'var(--ion-toolbar-background, var(--color))',
       borderColor: 'var(--ion-toolbar-border-color, var(--ion-border-color, #c1c4cd))',
     },
   },