update db fix

index.html

@@ -965,8 +965,20 @@
             if (oldest && oldest.id) url += `&before_id=${encodeURIComponent(oldest.id)}`;
           }
           const r = await fetch(url);
-          const data = await r.json().catch(() => ({}));
-          if (!r.ok || !data.ok) throw new Error(data.error || "chat load failed");
+          const raw = await r.text().catch(() => "");
+          let data = {};
+          try {
+            data = raw ? JSON.parse(raw) : {};
+          } catch {
+            data = {};
+          }
+          if (!r.ok || !data.ok) {
+            const details =
+              (data && data.error) ||
+              (raw && raw.trim() ? raw.trim().slice(0, 300) : "") ||
+              `${r.status} ${r.statusText}`.trim();
+            throw new Error(details || "chat load failed");
+          }
 
           const pageDesc = data.items || [];
           const pageChrono = pageDesc.slice().reverse(); // newest->oldest => oldest->newest