fix interactive bug

static/app.js

@@ -227,21 +227,13 @@ async function handleEnter() {
     return;
   }
 
-  // First, check if this URL already exists
-  setStatus('checking…', '');
-  try {
-    const lookupRes = await apiGet('/api/lookup?url=' + encodeURIComponent(url));
-    if (lookupRes.ok) {
-      // URL already exists — just show its metadata
-      const data = await lookupRes.json();
-      state.currentMeta = data;
-      renderMeta(data);
-      setStatus('exists', 'ok');
-      return;
-    }
-  } catch { /* lookup failed, proceed to create */ }
+  // If the debounced lookup already found this URL exists, just show it
+  if (state.currentMeta && state.currentMeta.original_url === url) {
+    setStatus('exists', 'ok');
+    return;
+  }
 
-  // URL does not exist — attempt to create
+  // Create a new short URL
   setStatus('creating…', '');
   try {
     const res = await apiPost('/api/shorten', { url: url });