feat(mission-control): restore MC tabs - temple, office, memory, claude, pdf-viewer, resume, resume-upload, temple-3d, demos

Also added:
- Memory API endpoints
- Briefs API endpoints
- AnveVoice stats API
- Claude spawn API
- TTS proxy
- Cleopatra voice widget
- api-auth middleware

lib/api-auth.ts

@@ -0,0 +1,18 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+const API_SECRET = process.env.API_SECRET || 'horus-mc-secret-2026';
+
+export function withAuth(handler: (req: NextRequest) => Promise<NextResponse>) {
+  return async (req: NextRequest) => {
+    const authHeader = req.headers.get('authorization');
+    const expectedToken = `Bearer ${API_SECRET}`;
+    
+    if (authHeader !== expectedToken) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+    
+    return handler(req);
+  };
+}
+
+export { API_SECRET };