Fix index gen

Author: razor-x

codegen/lib/connect.ts

@@ -41,10 +41,11 @@ export const connect = (
     setRouteLayoutContext(file, namespace, blueprint)
 
     const parentPath = namespace.parentPath ?? ''
+    routeIndexes[parentPath] ??= new Set()
     routeIndexes[parentPath]?.add(`${kebabCase(namespace.name)}.js`)
     routeIndexes[parentPath]?.add(`${kebabCase(namespace.name)}/index.js`)
 
-    const pathParts = parentPath.split('/')
+    const pathParts = namespace.path.split('/')
     while (pathParts.length > 1) {
       const name = pathParts.pop()
       if (name == null) throw new Error('Unexpected null')