fix(apps): forward _meta in tool results to MCP Apps (#7476)

ui/desktop/src/components/McpApps/McpAppRenderer.tsx

@@ -637,6 +637,7 @@ export default function McpAppRenderer({
     return {
       content: toolResult.content as unknown as CallToolResult['content'],
       structuredContent: toolResult.structuredContent as { [key: string]: unknown } | undefined,
+      _meta: toolResult._meta,
     };
   }, [toolResult]);
 

ui/desktop/src/components/McpApps/types.ts

@@ -40,6 +40,7 @@ export type McpAppToolCancelled = McpUiToolCancelledNotification['params'];
 export type McpAppToolResult = {
   content: Content[];
   structuredContent?: unknown;
+  _meta?: { [key: string]: unknown };
 };
 
 export type SamplingMessage = {