fix(schema): restore z.toJSONSchema native v4 API

script/build-schema-document.ts

@@ -1,14 +1,17 @@
-import { zodToJsonSchema } from "zod-to-json-schema"
+import { z } from "zod"
 import { OhMyOpenCodeConfigSchema } from "../src/config/schema"
 
 export function createOhMyOpenCodeJsonSchema(): Record<string, unknown> {
-  const jsonSchema = zodToJsonSchema(OhMyOpenCodeConfigSchema) as Record<string, unknown>
+  const jsonSchema = z.toJSONSchema(OhMyOpenCodeConfigSchema, {
+    target: "draft-7",
+    unrepresentable: "any",
+  }) as Record<string, unknown>
 
   return {
-    ...jsonSchema,
     $schema: "http://json-schema.org/draft-07/schema#",
     $id: "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",
     title: "Oh My OpenCode Configuration",
     description: "Configuration schema for oh-my-opencode plugin",
+    ...jsonSchema,
   }
 }