fix: fullscreen settting not working (#3215)

Co-authored-by: QiShaoXuan <qishaoxuan777@gmail.com>

apps/web/src/components/page-detail-editor.css.ts

@@ -10,7 +10,8 @@ export const editor = style({
   selectors: {
     '&.full-screen': {
       vars: {
-        '--affine-editor-width': '90%',
+        '--affine-editor-width': '100%',
+        '--affine-editor-side-padding': '15px',
       },
     },
   },