fix: update recent transactions badge styling and localize time formatting

- Added padding to the "Rückerstattet" badge for improved visual appearance.
- Updated time formatting in the formatRelativeTime function to use German language strings for better localization.

lib/format-time.ts

@@ -1,6 +1,6 @@
 /**
  * Formatiert einen Timestamp als relative Zeitangabe.
- * Beispiele: "Just now", "5m ago", "3h ago", "2d ago", "12. Mär"
+ * Beispiele: "Gerade eben", "vor 5 Min.", "vor 3 Std.", "vor 2 Tagen", "12. Mär"
  */
 export function formatRelativeTime(timestamp: number): string {
   const now = Date.now();
@@ -9,10 +9,10 @@ export function formatRelativeTime(timestamp: number): string {
   const hours = Math.floor(diff / 3600000);
   const days = Math.floor(diff / 86400000);
 
-  if (minutes < 1) return "Just now";
-  if (minutes < 60) return `${minutes}m ago`;
-  if (hours < 24) return `${hours}h ago`;
-  if (days < 7) return `${days}d ago`;
+  if (minutes < 1) return "Gerade eben";
+  if (minutes < 60) return `vor ${minutes} Min.`;
+  if (hours < 24) return `vor ${hours} Std.`;
+  if (days < 7) return days === 1 ? "vor 1 Tag" : `vor ${days} Tagen`;
   return new Date(timestamp).toLocaleDateString("de-DE", {
     day: "numeric",
     month: "short",