Add Chinese locale overrides to UI schema

Introduced responsive UI overrides for the 'zh-CN' locale, specifying custom show/hide behavior for toolbar elements at 'sm' and 'md' breakpoints. This enhances localization support for Chinese users.

Author: bobsingor

viewers/snippet/src/config/ui-schema.ts

@@ -26,6 +26,38 @@ export const viewerUISchema: UISchema = {
       responsive: {
         localeOverrides: {
           groups: [
+            {
+              id: 'chinese-languages',
+              locales: ['zh-CN'],
+              breakpoints: {
+                sm: {
+                  replaceHide: ['zoom-toolbar', 'mode-select-button', 'overflow-tabs-button'],
+                  replaceShow: [
+                    'view-mode',
+                    'annotate-mode',
+                    'shapes-mode',
+                    'redact-mode',
+
+                    'pan-button',
+                    'pointer-button',
+                    'divider-3',
+                  ],
+                },
+                md: {
+                  replaceShow: [
+                    'view-mode',
+                    'annotate-mode',
+                    'shapes-mode',
+                    'redact-mode',
+                    'zoom-toolbar',
+                    'pan-button',
+                    'pointer-button',
+                    'divider-3',
+                  ],
+                  replaceHide: ['zoom-menu-button', 'mode-select-button', 'overflow-tabs-button'],
+                },
+              },
+            },
             {
               id: 'germanic-languages',
               locales: ['de', 'nl'],