fix: render local-timezone dates client-side only

- started-tournament header and tournament list formatted times in the
  server timezone during ssr, mismatching hydration on every load

src/locales/de/messages.po

@@ -93,7 +93,7 @@ msgstr "{0, plural, one {Spieler angemeldet} other {Spieler angemeldet}}"
 
 #. placeholder {0}: tournamentStart.toLocaleDateString(i18n.locale, { weekday: "short", month: "short", day: "numeric", })
 #. placeholder {1}: tournamentStart.toLocaleTimeString(i18n.locale, { hour: "2-digit", minute: "2-digit", })
-#: src/features/tournaments/components/started-tournament/header.tsx:51
+#: src/features/tournaments/components/started-tournament/header.tsx:56
 msgid "{0} at {1}"
 msgstr "{0} um {1}"
 
@@ -1843,7 +1843,7 @@ msgstr "Noch keine Teams angemeldet"
 msgid "No teams found matching \"{search}\""
 msgstr "Keine Teams gefunden, die zu \"{search}\" passen"
 
-#: src/features/tournaments/components/tournament-list.tsx:95
+#: src/features/tournaments/components/tournament-list.tsx:98
 msgid "No tournaments found"
 msgstr "Keine Turniere gefunden"