refactor: extract app MIME type shared constant

Author: joehan

src/mcp/resources/update_environment_ui.ts

@@ -2,7 +2,7 @@ import { resource } from "../resource";
 import * as path from "path";
 import * as fs from "fs/promises";
 
-export const RESOURCE_MIME_TYPE = "application/vnd.mcp.ext-app+html";
+import { RESOURCE_MIME_TYPE } from "../util";
 const resourceUri = "ui://core/update_environment/mcp-app.html";
 
 export const update_environment_ui = resource(

src/mcp/util.ts

@@ -326,3 +326,5 @@ export function cleanSchema(schema: Record<string, any>): Record<string, any> {
   const result = deepClean(schema, true); // Pass true for isRootLevel
   return result === null ? {} : result;
 }
+
+export const RESOURCE_MIME_TYPE = "application/vnd.mcp.ext-app+html";