initial commit

lib/models/work_day.dart

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+import 'package:flutter/material.dart';
+import 'work_interval.dart';
+
+class WorkDay {
+  final DateTime date;
+  final List<WorkInterval> intervals; // bis zu 5
+  final String? absenceType;          // Urlaub, Krank, …
+  final int targetMinutes;            // Soll
+
+  const WorkDay({
+    required this.date,
+    required this.intervals,
+    required this.targetMinutes,
+    this.absenceType,
+  });
+
+  int get workedMinutes => intervals.fold(0, (sum, i) => sum + i.minutes);
+  int get diffMinutes => workedMinutes - targetMinutes;
+}

lib/models/work_interval.dart

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+import 'package:flutter/material.dart';
+
+class WorkInterval {
+  final TimeOfDay start;
+  final TimeOfDay end;
+
+  const WorkInterval(this.start, this.end);
+
+  int get minutes {
+    final aMin = start.hour * 60 + start.minute;
+    final bMin = end.hour * 60 + end.minute;
+    final d = bMin - aMin;
+    if (d <= 0) return 0;
+    if (d >= 24 * 60) return 24 * 60;
+    return d;
+  }
+}