Fix colors for default light mode theme (#10909)

* fix colors for default light mode theme

* remove redundancy

* fix export dialog

* don't use primary-foreground

* change secondary button variant to be default button

* change filters button to bg-selected when filtering

* slightly lighten secondary-foreground in light mode

* fix mobile motion only button

web/src/pages/UIPlayground.tsx

@@ -318,7 +318,11 @@ function UIPlayground() {
                 <CameraActivityIndicator />
               </div>
               <p>
-                <Button onClick={handleZoomOut} disabled={zoomLevel === 0}>
+                <Button
+                  variant="default"
+                  onClick={handleZoomOut}
+                  disabled={zoomLevel === 0}
+                >
                   Zoom Out
                 </Button>
                 <Button