Settings: clarify Codex 만료=결제, drop Claude expiry badge (#49)

- Codex expiry badge now says "결제 만료/까지" so it's unambiguous that
  this is the ChatGPT Pro/Team subscription end-date, not an OAuth
  access-token TTL.
- Claude rows no longer show an expiry badge: Claude credentials only
  expose an OAuth access_token TTL (auto-refreshed every few minutes
  by the existing claude token refresh loop), which is meaningless to
  the user. Replace it with a static "토큰 자동갱신" tag so the column
  alignment stays consistent.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

apps/dashboard/src/App.tsx

@@ -1340,16 +1340,19 @@ function formatExpiry(
   });
   if (days < 0) {
     const ago = Math.ceil(-days);
-    return { label: `${dateStr} 만료 (${ago}일 전)`, cls: 'is-expired' };
+    return {
+      label: `결제 만료 ${dateStr} (${ago}일 전)`,
+      cls: 'is-expired',
+    };
   }
   if (days < 7) {
     return {
-      label: `${dateStr}까지 (${Math.floor(days)}일)`,
+      label: `결제 ${dateStr}까지 (${Math.floor(days)}일)`,
       cls: 'is-soon',
     };
   }
   return {
-    label: `${dateStr}까지 (${Math.floor(days)}일)`,
+    label: `결제 ${dateStr}까지 (${Math.floor(days)}일)`,
     cls: 'is-active',
   };
 }
@@ -1475,11 +1478,7 @@ function AccountSettings({ onRestartStack }: { onRestartStack: () => void }) {
           <p className="settings-hint">계정 없음</p>
         ) : (
           <ul className="settings-account-list">
-            {data.claude.map((acc) => {
-              const expiry = formatExpiry(
-                acc.expiresAt ? new Date(acc.expiresAt).toISOString() : null,
-              );
-              return (
+            {data.claude.map((acc) => (
               <li key={acc.index} className="settings-account-row">
                 <div className="settings-account-main">
                   <span className="settings-account-tag">#{acc.index}</span>
@@ -1487,11 +1486,10 @@ function AccountSettings({ onRestartStack }: { onRestartStack: () => void }) {
                     {acc.subscriptionType ?? 'unknown'}
                     {acc.rateLimitTier ? ` · ${acc.rateLimitTier}` : ''}
                   </span>
-                    {expiry ? (
-                      <span className={`settings-account-badge ${expiry.cls}`}>
-                        {expiry.label}
+                  <span className="settings-account-plan">claude</span>
+                  <span className="settings-account-badge is-active">
+                    토큰 자동갱신
                   </span>
-                    ) : null}
                 </div>
                 {acc.index > 0 ? (
                   <button
@@ -1506,8 +1504,7 @@ function AccountSettings({ onRestartStack }: { onRestartStack: () => void }) {
                   <span className="settings-account-default">기본</span>
                 )}
               </li>
-              );
-            })}
+            ))}
           </ul>
         )}
         <div className="settings-add-token">