fix: show full url of feeds

frontend/components/letterfeed/NewsletterCard.tsx

@@ -3,6 +3,7 @@ import { Button } from "@/components/ui/button"
 import { Badge } from "@/components/ui/badge"
 import { Rss, Mail, ExternalLink, Edit } from "lucide-react"
 import { Newsletter, getFeedUrl } from "@/lib/api"
+import { useEffect, useState } from "react"
 
 interface NewsletterCardProps {
   newsletter: Newsletter
@@ -10,6 +11,17 @@ interface NewsletterCardProps {
 }
 
 export function NewsletterCard({ newsletter, onEdit }: NewsletterCardProps) {
+  const [absoluteFeedUrl, setAbsoluteFeedUrl] = useState(getFeedUrl(newsletter.id))
+
+  useEffect(() => {
+    const url = getFeedUrl(newsletter.id)
+    if (url.startsWith("/")) {
+      setAbsoluteFeedUrl(`${window.location.origin}${url}`)
+    } else {
+      setAbsoluteFeedUrl(url)
+    }
+  }, [newsletter.id])
+
   return (
     <Card className="hover:shadow-md transition-shadow flex flex-col">
       <CardHeader>
@@ -52,7 +64,7 @@ export function NewsletterCard({ newsletter, onEdit }: NewsletterCardProps) {
             className="inline-flex items-center gap-1 text-sm text-blue-600 hover:text-blue-800 hover:underline"
           >
             <ExternalLink className="w-3 h-3" />
-            {getFeedUrl(newsletter.id)}
+            {absoluteFeedUrl}
           </a>
         </div>
       </CardContent>