feat: Enhance email expiration options and update README

app/api/emails/generate/route.ts

@@ -58,7 +58,9 @@ export async function POST(request: Request) {
     }
 
     const now = new Date()
-    const expires = new Date(now.getTime() + expiryTime)
+    const expires = expiryTime === 0 
+      ? new Date('9999-01-01T00:00:00.000Z')
+      : new Date(now.getTime() + expiryTime)
     
     const emailData: typeof emails.$inferInsert = {
       address,

app/components/emails/email-list.tsx

@@ -140,7 +140,11 @@ export function EmailList({ onEmailSelect, selectedEmailId }: EmailListProps) {
                 <div className="truncate flex-1">
                   <div className="font-medium truncate">{email.address}</div>
                   <div className="text-xs text-gray-500">
-                    过期时间: {new Date(email.expiresAt).toLocaleString()}
+                    {new Date(email.expiresAt).getFullYear() === 9999 ? (
+                      "永久有效"
+                    ) : (
+                      `过期时间: ${new Date(email.expiresAt).toLocaleString()}`
+                    )}
                   </div>
                 </div>
               </div>

app/types/email.ts

@@ -1,10 +1,11 @@
 export interface ExpiryOption {
   label: string
-  value: number // 过期时间（毫秒）
+  value: number
 }
 
 export const EXPIRY_OPTIONS: ExpiryOption[] = [
   { label: '1小时', value: 1000 * 60 * 60 },
   { label: '24小时', value: 1000 * 60 * 60 * 24 },
-  { label: '3天', value: 1000 * 60 * 60 * 24 * 3 }
+  { label: '3天', value: 1000 * 60 * 60 * 24 * 3 },
+  { label: '永久', value: 0 }
 ]