Make _meta optional in McpUiAppResourceConfig

The `_meta` and `ui` properties were required, causing TypeScript errors
when calling `registerAppResource()` without providing metadata.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jonathanhefner

src/server/index.ts

@@ -62,8 +62,8 @@ export interface McpUiAppToolConfig extends ToolConfig {
  * MCP App Resource configuration for `registerAppResource`.
  */
 export interface McpUiAppResourceConfig extends ResourceMetadata {
-  _meta: {
-    ui: McpUiResourceMeta;
+  _meta?: {
+    ui?: McpUiResourceMeta;
     [key: string]: unknown;
   };
 }