fix: add root-level health and execute-tool routes for TPMJS compatibility

TPMJS verification expects endpoints at /health and /execute-tool,
not at /api/health and /api/execute-tool. This adds the correct routes
while keeping the /api versions for backwards compatibility.

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

Co-Authored-By: Claude <noreply@anthropic.com>

templates/vercel-executor/app/execute-tool/route.ts

@@ -0,0 +1,13 @@
+/**
+ * Tool Execution Endpoint (root path)
+ *
+ * POST /execute-tool
+ * TPMJS expects execute-tool at /execute-tool, not /api/execute-tool
+ * This re-exports from the api version for backwards compatibility
+ */
+
+export { POST, OPTIONS } from '../api/execute-tool/route';
+
+export const runtime = 'nodejs';
+export const dynamic = 'force-dynamic';
+export const maxDuration = 300;

templates/vercel-executor/app/health/route.ts

@@ -0,0 +1,33 @@
+/**
+ * Health Check Endpoint (root path)
+ *
+ * GET /health
+ * TPMJS expects health at /health, not /api/health
+ */
+
+import { NextResponse } from 'next/server';
+
+export const runtime = 'nodejs';
+export const dynamic = 'force-dynamic';
+
+interface HealthResponse {
+  status: 'ok' | 'degraded' | 'error';
+  version: string;
+  info?: {
+    runtime?: string;
+    region?: string;
+    timestamp?: string;
+  };
+}
+
+export async function GET(): Promise<NextResponse<HealthResponse>> {
+  return NextResponse.json({
+    status: 'ok',
+    version: '1.0.0',
+    info: {
+      runtime: 'vercel-sandbox',
+      region: process.env.VERCEL_REGION || 'unknown',
+      timestamp: new Date().toISOString(),
+    },
+  });
+}