fix: Resolve TypeScript build errors for production deployment

- Add type assertion for SurrealDB query results in debug/nodes route
- Install @types/three for Three.js type definitions
- Exclude tests directory from TypeScript compilation
- Wrap useSearchParams in Suspense boundary on login page (Next.js 16 requirement)

All routes now build successfully for production deployment.

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

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

app/api/debug/nodes/route.ts

@@ -33,7 +33,7 @@ export async function GET(request: NextRequest) {
       WHERE user_did = $userDid
     `;
     const results = await db.query(nodesQuery, { userDid });
-    const nodes = results[0] || [];
+    const nodes = (results[0] || []) as any[];
 
     // Count stats
     const stats = {

app/login/page.tsx

@@ -10,10 +10,10 @@ import {
   Text,
 } from '@mantine/core';
 import { useForm } from '@mantine/form';
-import { useState } from 'react';
+import { useState, Suspense } from 'react';
 import { useSearchParams } from 'next/navigation';
 
-export default function LoginPage() {
+function LoginForm() {
   const [isLoading, setIsLoading] = useState(false);
   const searchParams = useSearchParams();
   const error = searchParams.get('error');
@@ -89,3 +89,17 @@ export default function LoginPage() {
     </Center>
   );
 }
+
+export default function LoginPage() {
+  return (
+    <Suspense fallback={
+      <Center h="100vh">
+        <Paper w={400} p="xl">
+          <Title order={2} ta="center">Loading...</Title>
+        </Paper>
+      </Center>
+    }>
+      <LoginForm />
+    </Suspense>
+  );
+}