chore: update MCP package build process and configuration defaults

packages/mcp/package.json

@@ -14,7 +14,7 @@
     "classroomio-mcp": "./dist/index.js"
   },
   "scripts": {
-    "build": "pnpm -C ../utils build && tsc --noEmit && rm -rf dist tsconfig.tsbuildinfo && node ./scripts/build.mjs",
+    "build": "tsc --noEmit && rm -rf dist tsconfig.tsbuildinfo && node ./scripts/build.mjs",
     "dev": "tsx src/index.ts",
     "start": "node dist/index.js"
   },

packages/mcp/src/config.ts

@@ -1,7 +1,7 @@
 import { z } from 'zod';
 
 const ZConfig = z.object({
-  CLASSROOMIO_API_URL: z.string().url(),
+  CLASSROOMIO_API_URL: z.url().default('https://api.classroomio.com'),
   CLASSROOMIO_API_KEY: z.string().min(1),
   CLASSROOMIO_USER_AGENT: z.string().min(1).default('classroomio-mcp/0.0.1')
 });