fix: shorten travel day badge to "Reisetag x"

Use travel_day_number i18n key in journal cards and live log subtitle.

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

client/src/components/LiveLogView.tsx

@@ -765,7 +765,7 @@ export default function LiveLogView({
             <h2>{t('logs.live_title')}</h2>
             {date && (
               <p className="live-log-subtitle">
-                {t('logs.day_of_travel')} {dayOfTravel} · {new Date(date).toLocaleDateString()}
+                {t('logs.travel_day_number', { number: dayOfTravel })} · {new Date(date).toLocaleDateString()}
               </p>
             )}
           </div>

client/src/components/LogEntriesList.tsx

@@ -474,7 +474,7 @@ export default function LogEntriesList({
                 </h3>
                 <div className="card-meta">
                   <span className="sync-badge synced">
-                    {t('logs.day_of_travel')} {item.dayOfTravel}
+                    {t('logs.travel_day_number', { number: item.dayOfTravel })}
                   </span>
                   <EntrySkipperSignBadge status={item.skipperSignStatus} />
                   <span className="date-badge">