Add codeString prop to Snippet for formatted JSON

Pass JSON.stringify(...) as the codeString prop to Snippet so structured message/response objects are rendered as pretty-printed JSON and can be copied via the tooltip. Changes applied in show_structed_message.tsx, display_card/render.tsx, and display_card/response.tsx.

packages/napcat-webui-frontend/src/components/chat_input/components/show_structed_message.tsx

@@ -10,6 +10,7 @@ const ShowStructedMessage = ({ messages }: ShowStructedMessageProps) => {
   return (
     <Snippet
       hideSymbol
+      codeString={JSON.stringify(messages, null, 2)}
       tooltipProps={{
         content: '点击复制',
       }}

packages/napcat-webui-frontend/src/components/onebot/display_card/render.tsx

@@ -121,6 +121,7 @@ const OneBotItemRender = ({ data, index, style }: OneBotItemRenderProps) => {
                 <PopoverContent>
                   <Snippet
                     hideSymbol
+                    codeString={JSON.stringify(msg, null, 2)}
                     tooltipProps={{
                       content: '点击复制',
                     }}

packages/napcat-webui-frontend/src/components/onebot/display_card/response.tsx

@@ -41,6 +41,7 @@ const OneBotDisplayResponse: React.FC<OneBotDisplayResponseProps> = ({
           <PopoverContent>
             <Snippet
               hideSymbol
+              codeString={JSON.stringify(data.data, null, 2)}
               tooltipProps={{
                 content: '点击复制',
               }}