修正

frontend/js/api.js

@@ -4,10 +4,20 @@ async function apiGet(path, params = {}) {
   const query = new URLSearchParams(params).toString();
   const url = `${API_BASE}${path}?${query}`;
 
+  console.log(`📡 API GET: ${url}`);
+
   const res = await fetch(url);
+
+  console.log(`📊 Response status: ${res.status}`);
+
   if (!res.ok) {
     const data = await res.json();
+    console.error(`❌ API Error:`, data);
     throw new Error(data.detail || "APIエラー");
   }
-  return res.json();
+
+  const jsonData = await res.json();
+  console.log(`✅ API Response:`, jsonData);
+
+  return jsonData;
 }