fix: kickoff time centered without 'Uhr', unified countdown badge, DevPanel close button

- Kickoff: centered "21:00" above flags (no 'Uhr' suffix)
- Countdown: always rendered as badge (was unstyled span for <60min)
- DevPanel: added close button (✕) in panel header for reliable closing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/MatchCard.tsx

@@ -47,17 +47,7 @@ const STATUS_LABELS: Record<string, string> = {
 function formatKickoff(utcDate: string): string {
   return new Date(utcDate).toLocaleString('de-DE', {
     hour: '2-digit', minute: '2-digit', timeZone: 'Europe/Berlin',
-  }) + ' Uhr';
-}
-
-function CountdownBadge({ minutes }: { minutes: number }) {
-  if (minutes <= 0) return null;
-  if (minutes < 60) return <span className={styles.badgeUrgent}>⚡ in {minutes} Min.</span>;
-  const h = Math.floor(minutes / 60);
-  const m = minutes % 60;
-  if (h < 24) return <span className={styles.badge}>in {h}h{m > 0 ? ` ${m}m` : ''}</span>;
-  const d = Math.floor(h / 24);
-  return <span className={styles.badge}>in {d} Tag{d > 1 ? 'en' : ''}</span>;
+  });
 }
 
 function FlagBox({ crest, name }: { crest: string | null; name: string }) {
@@ -94,7 +84,7 @@ export default function MatchCard({ match, onTip }: Props) {
   return (
     <div className={`card ${styles.card} ${styles[`card_${state}`]} ${isLive ? styles.live : ''} ${glowClass}`}>
 
-      {/* Top row: Group + Kickoff + Countdown */}
+      {/* Top row: Group + Countdown */}
       <div className={styles.topRow}>
         {(isLive || isFinished) && (
           <span className={`${styles.status} ${isLive ? styles.statusLive : ''}`}>
@@ -107,21 +97,29 @@ export default function MatchCard({ match, onTip }: Props) {
             {match.group.replace('GROUP_', 'Gruppe ')}
           </span>
         )}
-        {!isFinished && !isLive && (
-          <span className={styles.kickoffBadge}>{formatKickoff(match.utcDate)}</span>
-        )}
         <span className={styles.topRowSpacer} />
         {(state === 'open' || state === 'tipped') && match.tippable && (
-          match.minutesUntilKickoff < 60 ? (
-            <span className={`${styles.countdown} ${remainingMins < 5 ? styles.countdownUrgent : ''}`}>
-              Noch {remainingMins} Min!
-            </span>
-          ) : (
-            <CountdownBadge minutes={match.minutesUntilKickoff} />
-          )
+          <span className={`${styles.badge} ${remainingMins < 60 ? styles.badgeUrgent : ''} ${remainingMins < 5 ? styles.countdownUrgent : ''}`}>
+            {match.minutesUntilKickoff < 60
+              ? `Noch ${remainingMins} Min!`
+              : (() => {
+                  const h = Math.floor(match.minutesUntilKickoff / 60);
+                  if (h < 24) return `in ${h}h`;
+                  const d = Math.floor(h / 24);
+                  return `in ${d} Tag${d > 1 ? 'en' : ''}`;
+                })()
+            }
+          </span>
         )}
       </div>
 
+      {/* Kickoff time — centered above flags */}
+      {!isFinished && !isLive && (
+        <div className={styles.kickoffRow}>
+          <span className={styles.kickoffTime}>{formatKickoff(match.utcDate)}</span>
+        </div>
+      )}
+
       {/* Teams + Score */}
       <div className={styles.matchRow}>
         {/* Home */}