Add import, fix export

app/utils/chatExport.ts

@@ -1,46 +0,0 @@
-import type { Message } from 'ai';
-import { toast } from 'react-toastify';
-
-export interface ChatExportData {
-  messages: Message[];
-  description?: string;
-  exportDate: string;
-}
-
-export const exportChat = (messages: Message[], description?: string) => {
-  const chatData: ChatExportData = {
-    messages,
-    description,
-    exportDate: new Date().toISOString(),
-  };
-
-  const blob = new Blob([JSON.stringify(chatData, null, 2)], { type: 'application/json' });
-  const url = URL.createObjectURL(blob);
-  const a = document.createElement('a');
-  a.href = url;
-  a.download = `chat-${new Date().toISOString()}.json`;
-  document.body.appendChild(a);
-  a.click();
-  document.body.removeChild(a);
-  URL.revokeObjectURL(url);
-};
-
-export const importChat = async (file: File): Promise<ChatExportData> => {
-  return new Promise((resolve, reject) => {
-    const reader = new FileReader();
-    reader.onload = (e) => {
-      try {
-        const content = e.target?.result as string;
-        const data = JSON.parse(content);
-        if (!Array.isArray(data.messages)) {
-          throw new Error('Invalid chat file format');
-        }
-        resolve(data);
-      } catch (error) {
-        reject(new Error('Failed to parse chat file'));
-      }
-    };
-    reader.onerror = () => reject(new Error('Failed to read chat file'));
-    reader.readAsText(file);
-  });
-};