feat: count_day_types — compte les jours par type

app/business/time_calc.py

@@ -23,3 +23,11 @@ def work_minutes_reference(day_type: str) -> int:
 
 def week_balance_minutes(actual_minutes: int, reference_minutes: int) -> int:
     return actual_minutes - reference_minutes
+
+
+def count_day_types(entries: list) -> dict[str, int]:
+    """Retourne un dict {day_type: count} pour une liste d'entrées, sans les zéros."""
+    counts: dict[str, int] = {}
+    for entry in entries:
+        counts[entry.day_type] = counts.get(entry.day_type, 0) + 1
+    return counts