fix function calling + add clear all on chats

dashboard/server/api/ai/delete_all_chats.ts

@@ -0,0 +1,13 @@
+
+import { AiChatModel } from "@schema/ai/AiChatSchema";
+
+export default defineEventHandler(async event => {
+
+    const data = await getRequestData(event);
+    if (!data) return;
+
+    const { project_id } = data;
+
+    const result = await AiChatModel.updateMany({ project_id }, { deleted: true });
+    return result.modifiedCount > 0;
+});