fix: pages.json style use app-plus

packages/shims-uni-app.d.ts

@@ -125,6 +125,7 @@ declare namespace UniApp {
   interface PagesJsonPagePlatformStyle {
     h5?: PagesJsonPageStyle
     app?: PagesJsonPageStyle
+    'app-plus'?: PagesJsonPageStyle
     'mp-alipay'?: PagesJsonPageStyle
     'mp-baidu'?: PagesJsonPageStyle
     'mp-qq'?: PagesJsonPageStyle

packages/uni-cli-shared/src/json/pages.ts

@@ -105,7 +105,7 @@ function normalizePageStyle(
 ) {
   if (pageStyle) {
     if (platform === 'h5') {
-      Object.assign(pageStyle, pageStyle['app'] || {})
+      Object.assign(pageStyle, pageStyle['app'] || pageStyle['app-plus'] || {})
     }
     Object.assign(pageStyle, pageStyle[platform] || {})
     if (['h5', 'app'].includes(platform)) {