fix: opravy po review

client/src/components/modals/PayForGroupModal.tsx

@@ -17,6 +17,7 @@ type Props = {
     payerLogin: string;
     bankAccount: string;
     bankAccountHolder: string;
+    groupId?: string;
 };
 
 function sanitizeAmount(value: string): string {
@@ -32,7 +33,7 @@ function parseAmount(s: string): number | null {
     return Math.round(n * 100) / 100;
 }
 
-export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, bankAccount, bankAccountHolder }: Readonly<Props>) {
+export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, bankAccount, bankAccountHolder, groupId }: Readonly<Props>) {
     const [diners, setDiners] = useState<DinerEntry[]>([]);
     const [tipTotal, setTipTotal] = useState('');
     const [error, setError] = useState<string | null>(null);
@@ -63,10 +64,16 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
         const totalPeople = includedNonPayers.length + 1; // +1 for payer
         return Math.round((tip / totalPeople) * 100) / 100;
     })();
+    const payerTipShare = (() => {
+        const tip = parseAmount(tipTotal);
+        if (!tip) return 0;
+        return Math.round((tip - tipPerPerson * includedNonPayers.length) * 100) / 100;
+    })();
 
     const getTotal = (d: DinerEntry): number => {
         const surcharge = parseAmount(d.surchargeAmount) ?? 0;
-        return Math.round((d.baseAmount + surcharge + tipPerPerson) * 100) / 100;
+        const tip = d.login === payerLogin ? payerTipShare : tipPerPerson;
+        return Math.round((d.baseAmount + surcharge + tip) * 100) / 100;
     };
 
     const handleInclude = useCallback((login: string, checked: boolean) => {
@@ -112,7 +119,7 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
         setLoading(true);
         try {
             const response = await generateQr({
-                body: { recipients, bankAccount, bankAccountHolder },
+                body: { recipients, bankAccount, bankAccountHolder, ...(groupId ? { groupId } : {}) },
             });
             if (response.error) {
                 setError((response.error as any).error || 'Nastala chyba při generování QR kódů');
@@ -203,7 +210,7 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
                                                 </div>
                                             </td>
                                             <td className="text-end">
-                                                {tipPerPerson > 0 ? `${tipPerPerson} Kč` : '—'}
+                                                {(() => { const s = isPayer ? payerTipShare : tipPerPerson; return s > 0 ? `${s} Kč` : '—'; })()}
                                             </td>
                                             <td className="text-end fw-bold">
                                                 {`${total} Kč`}