Fix production TypeScript build errors across meetups, media proxy, and join modal.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/components/JoinModal.tsx

@@ -83,10 +83,10 @@ export default function JoinModal({ isOpen, onClose, initialEmail = "", vipOnly
         method: "POST",
         body: JSON.stringify({ email: em }),
       });
-      if (!data?.ok) {
+      if (!data?.ok || !data.token) {
         throw new Error(data?.error || (locale === "zh" ? "操作失败" : "Operation failed"));
       }
-      await saveAuth(data.token, data.record);
+      await saveAuth(data.token, data.record ?? {});
       continueAfterAuth(String(data.user_id));
     } catch (err) {
       setError(err instanceof Error ? err.message : "操作失败");