Add default admin user creation and fix modal overlay positioning

server/utils/database.ts

@@ -51,7 +51,16 @@ async function initializeDatabase(db: Database.Database) {
     )
   `)
 
-  // Note: Admin user creation is handled in auth.ts to avoid circular dependencies
+  // Create default admin user if it doesn't exist
+  const config = useRuntimeConfig()
+  const bcrypt = await import('bcrypt')
+  const saltRounds = 10
+  const passwordHash = await bcrypt.hash(config.adminPassword, saltRounds)
+
+  const existingAdmin = db.prepare('SELECT id FROM users WHERE username = ?').get('admin')
+  if (!existingAdmin) {
+    db.prepare('INSERT INTO users (username, password_hash) VALUES (?, ?)').run('admin', passwordHash)
+  }
 }
 
 export function closeDatabase() {