Add carryover management for overtime, update weekday naming to German, and enhance reset functionality.

src/App.tsx

@@ -1,8 +1,8 @@
-import { SegmentedControl, Center, Stack, Button, Text, NumberInput } from '@mantine/core';
+import { SegmentedControl, Center, Stack, Button, Text, NumberInput, Space } from '@mantine/core';
 import { TimePicker } from '@mantine/dates';
 import * as React from 'react';
 
-type Workday = 'Monday' | 'Tuesday' | 'Wednesday' | 'Thursday' | 'Friday';
+type Workday = 'Montag' | 'Dienstag' | 'Mittwoch' | 'Donnerstag' | 'Freitag';
 
 interface DayRecord {
     start: string;
@@ -15,9 +15,12 @@ interface DayRecord {
 type Records = Partial<Record<Workday, DayRecord>>;
 
 const STORAGE_KEY = 'workTrackerRecords';
+const CARRYOVER_KEY = 'workTrackerCarryover';
 
 const DEFAULT_RECORD: DayRecord = { start: '', end: '', breakMins: 0, workedHrs: 0, overtimeMinutes: 0 };
 
+const WEEKDAYS: Workday[] = ['Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag'];
+
 const loadRecords = (): Records => {
     try {
         const raw = localStorage.getItem(STORAGE_KEY);
@@ -27,6 +30,15 @@ const loadRecords = (): Records => {
     }
 };
 
+const loadCarryover = (): number => {
+    try {
+        const val = Number(localStorage.getItem(CARRYOVER_KEY));
+        return Number.isFinite(val) ? val : 0;
+    } catch {
+        return 0;
+    }
+};
+
 const toMinutes = (time: string): number | null => {
     const match = /^(\d{2}):(\d{2})$/.exec(time);
     if (!match) return null;
@@ -42,6 +54,7 @@ const fromMinutes = (mins: number): string => {
 function App() {
     const [selectedDay, setSelectedDay] = React.useState<Workday>('Monday');
     const [records, setRecords] = React.useState<Records>(loadRecords);
+    const [carryoverMinutes, setCarryoverMinutes] = React.useState<number>(loadCarryover);
 
     const record = records[selectedDay] ?? DEFAULT_RECORD;
 
@@ -49,6 +62,10 @@ function App() {
         localStorage.setItem(STORAGE_KEY, JSON.stringify(records));
     }, [records]);
 
+    React.useEffect(() => {
+        localStorage.setItem(CARRYOVER_KEY, String(carryoverMinutes));
+    }, [carryoverMinutes]);
+
     const updateRecord = (patch: Partial<DayRecord>) => {
         setRecords((prev) => ({
             ...prev,
@@ -64,14 +81,14 @@ function App() {
     }
 
     const getWeeklyBalance = () => {
-        const days: Workday[] = ['Monday', 'Tuesday', 'Wednesday', 'Thursday'];
-        return days.reduce((sum, day) => sum + (records[day]?.overtimeMinutes ?? 0), 0);
+        const days: Workday[] = ['Montag', 'Dienstag', 'Mittwoch', 'Donnerstag'];
+        return days.reduce((sum, day) => sum + (records[day]?.overtimeMinutes ?? 0), 0) + carryoverMinutes;
     }
 
     const getWorkEndTime = () => {
         const start = toMinutes(record.start);
-        if (start === null) return '—';
-        const balance = selectedDay === 'Friday' ? getWeeklyBalance() : 0;
+        if (start === null) return '-';
+        const balance = selectedDay === 'Freitag' ? getWeeklyBalance() : 0;
         return fromMinutes(start + 8 * 60 - balance + record.breakMins);
     }
 
@@ -80,16 +97,21 @@ function App() {
         updateRecord({ workedHrs: hours, overtimeMinutes: Math.round((hours - 8) * 60) });
     }
 
-    const handleReset = () => {
-        localStorage.removeItem(STORAGE_KEY);
+    const handleResetWorkdays = () => {
+        const totalOvertime = WEEKDAYS.reduce((sum, day) => sum + (records[day]?.overtimeMinutes ?? 0), 0) + carryoverMinutes;
+        setCarryoverMinutes(totalOvertime);
         setRecords({});
     }
 
+    const handleResetOvertime = () => {
+        setCarryoverMinutes(0);
+    }
+
     return (
-        <Center>
+        <Center className={"my-auto"}>
             <Stack>
                 <SegmentedControl
-                    data={['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']}
+                    data={['Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag']}
                     onChange={(value) => setSelectedDay(value as Workday)}
                     className={"mt-2"}
                 />
@@ -117,26 +139,33 @@ function App() {
                 />
 
                 <Button onClick={handleSave}>
-                    Speichern
+                    Berechnen + Speichern
                 </Button>
 
                 <Text>Gearbeitete Stunden heute: {record.workedHrs.toFixed(2)}</Text>
-                {selectedDay === 'Friday' && (
-                    <Text c={"green"}>Übertragen aus Montag bis Donnerstag: {getWeeklyBalance()} Minuten</Text>
+                {carryoverMinutes !== 0 && (
+                    <Text c={"blue"}>Übernommene Überstunden aus Vorwoche: {carryoverMinutes} Minuten</Text>
+                )}
+                {selectedDay === 'Freitag' && (
+                    <Text c={"green"}>Übertragen aus Montag bis Donnerstag (inkl. Vorwoche): {getWeeklyBalance()} Minuten</Text>
                 )}
                 <Text>Wann du gehen kannst für 8 Stunden: {getWorkEndTime()}</Text>
-                {record.overtimeMinutes === 0 && (
+                {record.start && record.end && record.overtimeMinutes === 0 && (
                     <Text>Du hast genau 8 Stunden gearbeitet.</Text>
                 )}
-                {record.overtimeMinutes > 0 && (
+                {record.start && record.end && record.overtimeMinutes > 0 && (
                     <Text c="yellow">Überstunden: {record.overtimeMinutes} Minuten</Text>
                 )}
-                {record.overtimeMinutes < 0 && (
+                {record.start && record.end && record.overtimeMinutes < 0 && (
                     <Text c={"red"}>Fehlende Minuten für 8 Stunden: {-record.overtimeMinutes} Minuten</Text>
                 )}
 
-                <Button color="red" variant="outline" onClick={handleReset}>
-                    Reset saved records
+                <Space h={"xl"} />
+                <Button color="red" variant="outline" onClick={handleResetWorkdays}>
+                    Arbeitstage zurücksetzen
+                </Button>
+                <Button color="red" variant="outline" onClick={handleResetOvertime}>
+                    Überstunden zurücksetzen
                 </Button>
             </Stack>
         </Center>

src/main.tsx

@@ -1,5 +1,4 @@
 import '@mantine/core/styles.css';
-import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
 import './index.css'
 import App from './App.tsx'