Upgrade h3 to v2 (#154)

- Replace `createApp()` + `createRouter()` + `app.use(router)` with `new H3()` and direct route registration
- Replace `defineEventHandler` with `defineHandler`
- Replace `type App` with `type H3`
- Replace `toNodeListener` with `toNodeHandler` in server.ts and tests
- Replace `event.node.req.headers[x]` with `event.req.headers.get(x)`
- Replace `event.node.res.statusCode` with `event.res.status`
- Replace `setResponseHeader(event, ...)` with `event.res.headers.set(...)`
- Replace `sendRedirect(event, url)` with `redirect(url)`
- Replace `readBody(event)` with `event.req.json()` / `event.req.text()` / `event.req.formData()`
- Use `event.runtime?.node` for SSE Node.js raw response access (deprecated `event.node`)
- Write SSE response headers directly via `nodeRes.writeHead()`

Co-authored-by: Claude <claude@anthropic.com>

Author: titouanmathis

package-lock.json

@@ -84,7 +84,7 @@
     "@modelcontextprotocol/sdk": "^1.27.1",
     "@studiometa/productive-api": "*",
     "@studiometa/productive-core": "*",
-    "h3": "^1.15.5",
+    "h3": "^2.0.1-rc.14",
     "zod": "4.3.6"
   },
   "devDependencies": {

packages/mcp/package.json

@@ -1,4 +1,4 @@
-import { toNodeListener } from 'h3';
+import { toNodeHandler } from 'h3';
 import { createServer, type Server as HttpServer } from 'node:http';
 import { describe, it, expect, vi, beforeEach, beforeAll, afterAll } from 'vitest';
 
@@ -149,7 +149,7 @@ describe('HTTP Server Integration', () => {
 
   beforeAll(async () => {
     const app = createHttpApp();
-    server = createServer(toNodeListener(app));
+    server = createServer(toNodeHandler(app));
 
     await new Promise<void>((resolve) => {
       server.listen(0, '127.0.0.1', () => {