Initialer Push, Grundsätzlich funktioniert das Programm

src/notarius/gui/format_utils.py

@@ -0,0 +1,21 @@
+"""Gemeinsame Formatierungshelfer für die GUI (Dauer- und Zeitstempelanzeige)."""
+
+from __future__ import annotations
+
+from datetime import datetime
+
+
+def format_duration(seconds: float) -> str:
+    total_seconds = max(0, int(seconds))
+    hours, remainder = divmod(total_seconds, 3600)
+    minutes, secs = divmod(remainder, 60)
+    if hours:
+        return f"{hours:02d}:{minutes:02d}:{secs:02d}"
+    return f"{minutes:02d}:{secs:02d}"
+
+
+def format_timestamp(iso_timestamp: str) -> str:
+    try:
+        return datetime.fromisoformat(iso_timestamp).strftime("%d.%m.%Y %H:%M:%S")
+    except ValueError:
+        return iso_timestamp