fix: oprava updateData v Redis storage (node-redis v5 nemá executeIsolated)

- Socket.io Redis adapter pro sdílený stav přes repliky
- graceful shutdown serveru
- WATCH/MULTI v updateData pro race-condition-safe aktualizace
- lease mechanismus pro push reminder (zabrání duplicitnímu odesílání)
- k8s/ manifesty pro testovací kind cluster
- Dockerfile: opraven EXPOSE port na 3001
- .gitignore: ignorovány Claude pracovní soubory

.gitignore

@@ -4,3 +4,6 @@ types/gen
 .mcp.json
 .claude/settings.local.json
 server/public/
+.claude/*.lock
+.claude/worktrees
+.playwright-mcp

.vscode/launch.json

@@ -0,0 +1,32 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Server (ts-node, debug)",
+      "type": "node",
+      "request": "launch",
+      "cwd": "${workspaceFolder}/server",
+      "runtimeArgs": ["-r", "ts-node/register"],
+      "program": "${workspaceFolder}/server/src/index.ts",
+      "env": { "NODE_ENV": "development" },
+      "console": "integratedTerminal",
+      "skipFiles": ["<node_internals>/**"],
+      "preLaunchTask": "types: openapi-ts"
+    },
+    {
+      "name": "Client (vite + Edge)",
+      "type": "msedge",
+      "request": "launch",
+      "url": "http://localhost:3000",
+      "webRoot": "${workspaceFolder}/client",
+      "preLaunchTask": "client: vite"
+    }
+  ],
+  "compounds": [
+    {
+      "name": "Dev: server + client",
+      "configurations": ["Server (ts-node, debug)", "Client (vite + Edge)"],
+      "stopAll": true
+    }
+  ]
+}

Dockerfile

@@ -76,7 +76,7 @@ WORKDIR /app
 # Export /data/db.json do složky /data
 VOLUME ["/data"]
 
-EXPOSE 3000
+EXPOSE 3001
 
 CMD [ "node", "./server/src/index.js" ]
 

TODO.md

@@ -1,4 +1,9 @@
 # TODO
+
+## HA / multi-replica follow-ups
+- [ ] `foodRoutes.ts` per-pod rate limiter (`rateLimits` map) — s více replikami může uživatel překročit limit ~N× rychleji; přesunout do Redis (např. `INCR` + `EXPIRE`)
+- [ ] `easterEggRoutes.ts` — náhodně generované URL easter eggů jsou per-pod; URL funguje pouze na podu, který ji vygeneroval; zvážit deterministické seedy nebo sdílení přes Redis
+- [ ] `service.ts` — komplexní víceúrovňové funkce (`addChoice`, `removeChoiceIfPresent`) provádějí více po sobě jdoucích zápisů do stejného Redis klíče; pro plnou atomicitu je potřeba per-klíčový distribuovaný zámek (Redlock nebo `SET NX EX`) nebo sloučení logiky do jednoho `updateData` volání
 - [ ] HTTP_REMOTE_TRUSTED_IPS se nikde nevalidují, hlavičky jsou přijímány odkudkoli
 - [ ] V případě zapnutí přihlašování přes trusted headers nefunguje standardní přihlášení (nevrátí žádnou odpověď)
   - [ ] Nemělo by se jít dostat na přihlašovací formulář (měla by tam být nanejvýš hláška nebo přesměrování) 

client/src/App.scss

@@ -226,6 +226,7 @@ body {
   &:hover svg {
     transform: rotate(15deg);
   }
+
 }
 
 // ============================================

client/src/App.tsx

@@ -13,10 +13,12 @@ import './App.scss';
 import { faCircleCheck, faNoteSticky, faTrashCan, faComment } from '@fortawesome/free-regular-svg-icons';
 import { useSettings } from './context/settings';
 import Footer from './components/Footer';
-import { faBasketShopping, faChainBroken, faChevronLeft, faChevronRight, faGear, faMoneyBillTransfer, faSatelliteDish, faSearch, faTriangleExclamation } from '@fortawesome/free-solid-svg-icons';
+import { faArrowUpRightFromSquare, faBasketShopping, faChainBroken, faChevronLeft, faChevronRight, faGear, faMoneyBillTransfer, faSatelliteDish, faSearch, faTriangleExclamation } from '@fortawesome/free-solid-svg-icons';
+import { useNavigate } from 'react-router-dom';
 import Loader from './components/Loader';
 import { getHumanDateTime, isInTheFuture, formatDateString } from './Utils';
 import NoteModal from './components/modals/NoteModal';
+import ConfirmModal from './components/modals/ConfirmModal';
 import PayForAllModal from './components/modals/PayForAllModal';
 import { useEasterEgg } from './context/eggs';
 import { ClientData, Food, MealSlot, PendingQr, PizzaOrder, DepartureTime, PizzaDayState, Restaurant, RestaurantDayMenu, RestaurantDayMenuMap, LunchChoice, LocationLunchChoicesMap, UserLunchChoice, PizzaVariant, getData, getEasterEggImage, addPizza, removePizza, updatePizzaDayNote, createPizzaDay, deletePizzaDay, lockPizzaDay, unlockPizzaDay, finishOrder, finishDelivery, addChoice, jdemeObed, removeChoices, removeChoice, updateNote, changeDepartureTime, setBuyer, dismissQr, generateQr } from '../../types';
@@ -59,6 +61,7 @@ const EASTER_EGG_DEFAULT_DURATION = 0.75;
 function App() {
   const auth = useAuth();
   const settings = useSettings();
+  const navigate = useNavigate();
   const [easterEgg, _] = useEasterEgg(auth);
   const [isConnected, setIsConnected] = useState<boolean>(false);
   const [data, setData] = useState<ClientData>();
@@ -75,6 +78,7 @@ function App() {
   const [dayIndex, setDayIndex] = useState<number>();
   const [loadingPizzaDay, setLoadingPizzaDay] = useState<boolean>(false);
   const [noteModalOpen, setNoteModalOpen] = useState<boolean>(false);
+  const [dismissQrId, setDismissQrId] = useState<string | null>(null);
   const [payForAllLocationKey, setPayForAllLocationKey] = useState<LunchChoice | null>(null);
   const [eggImage, setEggImage] = useState<Blob>();
   const eggRef = useRef<HTMLImageElement>(null);
@@ -151,6 +155,21 @@ function App() {
     }
   }, [auth?.login, socket]);
 
+  // Po znovupřipojení socketu znovu vstoupit do místnosti a obnovit data
+  useEffect(() => {
+    const onReconnect = () => {
+      if (auth?.login) socket.emit('join', auth.login);
+      getData({ query: { dayIndex: dayIndexRef.current } }).then(response => {
+        if (response.data) {
+          setData(response.data);
+          setFood(response.data.menus);
+        }
+      });
+    };
+    socket.io.on('reconnect', onReconnect);
+    return () => { socket.io.off('reconnect', onReconnect); };
+  }, [socket, auth?.login]);
+
   useEffect(() => {
     if (!auth?.login || !data?.choices) {
       return
@@ -449,7 +468,7 @@ function App() {
     data.pizzaList?.forEach((pizza, index) => {
       const group: SelectSearchOption = { name: pizza.name, type: "group", items: [] }
       pizza.sizes.forEach((size, sizeIndex) => {
-        const name = `${size.size} (${size.price} Kč)`;
+        const name = `${size.size} (${size.price / 100} Kč)`;
         const value = `pizza|${index}|${sizeIndex}`;
         group.items?.push({ name, value });
       })
@@ -458,7 +477,7 @@ function App() {
     if (data.salatList?.length) {
       const salatGroup: SelectSearchOption = { name: "Saláty", type: "group", items: [] }
       data.salatList.forEach((salat, index) => {
-        salatGroup.items?.push({ name: `${salat.name} (${salat.price} Kč)`, value: `salat|${index}` });
+        salatGroup.items?.push({ name: `${salat.name} (${salat.price / 100} Kč)`, value: `salat|${index}` });
       });
       suggestions.push(salatGroup);
     }
@@ -732,6 +751,9 @@ function App() {
                                               markAsBuyer();
                                             }} icon={faBasketShopping} className={isBuyer ? 'buyer-icon' : 'action-icon'} style={{ cursor: 'pointer' }} />
                                           </span>}
+                                          {login === auth.login && locationKey === LunchChoice.OBJEDNAVAM && <span title='Přejít na stránku objednávek'>
+                                            <FontAwesomeIcon onClick={() => navigate('/objednani')} icon={faArrowUpRightFromSquare} className='action-icon' style={{ cursor: 'pointer' }} />
+                                          </span>}
                                           {login !== auth.login && locationKey === LunchChoice.OBJEDNAVAM && isBuyer && <span title='Objednávající'>
                                             <FontAwesomeIcon onClick={() => {
                                               copyNote(userPayload.note!);
@@ -904,18 +926,12 @@ function App() {
               {data.pendingQrs.map(qr => (
                 <div key={qr.id} className='qr-code mb-3'>
                   <p>
-                    <strong>{formatDateString(qr.date)}</strong> — {qr.creator} ({qr.totalPrice} Kč)
+                    <strong>{formatDateString(qr.date)}</strong> — {qr.creator} ({qr.totalPrice / 100} Kč)
                     {qr.purpose && <><br /><span className="text-muted">{qr.purpose}</span></>}
                   </p>
                   <img src={`/api/qr?login=${auth.login}&id=${qr.id}`} alt='QR kód' />
                   <div className='mt-2'>
-                    <Button variant="success" onClick={async () => {
-                      await dismissQr({ body: { id: qr.id } });
-                      const response = await getData({ query: { dayIndex } });
-                      if (response.data) {
-                        setData(response.data);
-                      }
-                    }}>
+                    <Button variant="success" onClick={() => setDismissQrId(qr.id)}>
                       Zaplatil jsem
                     </Button>
                   </div>
@@ -931,6 +947,24 @@ function App() {
       /> */}
       <Footer />
       <NoteModal isOpen={noteModalOpen} onClose={() => setNoteModalOpen(false)} onSave={saveNote} />
+      <ConfirmModal
+        isOpen={dismissQrId !== null}
+        title="Potvrzení platby"
+        message="Opravdu jste zaplatili? QR kód bude odstraněn."
+        confirmLabel="Zaplatil jsem"
+        confirmVariant="success"
+        onClose={() => setDismissQrId(null)}
+        onConfirm={async () => {
+          if (!dismissQrId) return;
+          const id = dismissQrId;
+          setDismissQrId(null);
+          await dismissQr({ body: { id } });
+          const response = await getData({ query: { dayIndex } });
+          if (response.data) {
+            setData(response.data);
+          }
+        }}
+      />
       {payForAllLocationKey && data && (
         <PayForAllModal
           isOpen

client/src/components/Header.tsx

@@ -3,6 +3,7 @@ import { Navbar, Nav, NavDropdown, Modal, Button } from "react-bootstrap";
 import { useAuth } from "../context/auth";
 import SettingsModal from "./modals/SettingsModal";
 import { useSettings, ThemePreference } from "../context/settings";
+import HuePicker from "./HuePicker";
 import FeaturesVotingModal from "./modals/FeaturesVotingModal";
 import PizzaCalculatorModal from "./modals/PizzaCalculatorModal";
 import RefreshMenuModal from "./modals/RefreshMenuModal";
@@ -40,25 +41,7 @@ export default function Header({ choices, dayIndex }: Props) {
     const [clearMockModalOpen, setClearMockModalOpen] = useState<boolean>(false);
     const [featureVotes, setFeatureVotes] = useState<FeatureRequest[] | undefined>([]);
 
-    // Zjistíme aktuální efektivní téma (pro zobrazení správné ikony)
-    const [effectiveTheme, setEffectiveTheme] = useState<'light' | 'dark'>('light');
-
-    useEffect(() => {
-        const updateEffectiveTheme = () => {
-            if (settings?.themePreference === 'system') {
-                const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
-                setEffectiveTheme(isDark ? 'dark' : 'light');
-            } else {
-                setEffectiveTheme(settings?.themePreference || 'light');
-            }
-        };
-
-        updateEffectiveTheme();
-
-        const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
-        mediaQuery.addEventListener('change', updateEffectiveTheme);
-        return () => mediaQuery.removeEventListener('change', updateEffectiveTheme);
-    }, [settings?.themePreference]);
+    const effectiveDark = settings?.effectiveDark ?? false;
 
     useEffect(() => {
         if (auth?.login) {
@@ -110,8 +93,7 @@ export default function Header({ choices, dayIndex }: Props) {
     }
 
     const toggleTheme = () => {
-        // Přepínáme mezi light a dark (ignorujeme system pro jednoduchost)
-        const newTheme: ThemePreference = effectiveTheme === 'dark' ? 'light' : 'dark';
+        const newTheme: ThemePreference = effectiveDark ? 'light' : 'dark';
         settings?.setThemePreference(newTheme);
     }
 
@@ -195,11 +177,16 @@ export default function Header({ choices, dayIndex }: Props) {
                 <button
                     className="theme-toggle"
                     onClick={toggleTheme}
-                    title={effectiveTheme === 'dark' ? 'Přepnout na světlý režim' : 'Přepnout na tmavý režim'}
-                    aria-label="Přepnout barevný motiv"
+                    title={effectiveDark ? 'Přepnout na světlý režim' : 'Přepnout na tmavý režim'}
+                    aria-label="Přepnout světlý/tmavý režim"
                 >
-                    <FontAwesomeIcon icon={effectiveTheme === 'dark' ? faSun : faMoon} />
+                    <FontAwesomeIcon icon={effectiveDark ? faSun : faMoon} />
                 </button>
+                <HuePicker
+                    accentHue={settings?.accentHue ?? 142}
+                    isDark={effectiveDark}
+                    onChange={hue => settings?.setAccentHue(hue)}
+                />
                 <NavDropdown align="end" title={auth?.login} id="basic-nav-dropdown">
                     <NavDropdown.Item onClick={() => setSettingsModalOpen(true)}>Nastavení</NavDropdown.Item>
                     <NavDropdown.Item onClick={() => setRefreshMenuModalOpen(true)}>Přenačtení menu</NavDropdown.Item>

client/src/components/HuePicker.scss

@@ -0,0 +1,138 @@
+.hue-picker-dropdown {
+  .dropdown-toggle {
+    background: transparent !important;
+    border: none !important;
+    color: var(--luncher-navbar-text) !important;
+    padding: 8px 12px;
+    font-size: 1.1rem;
+    display: flex;
+    align-items: center;
+    cursor: pointer;
+    border-radius: var(--luncher-radius-sm);
+    transition: var(--luncher-transition);
+
+    &::after {
+      display: none;
+    }
+
+    &:hover {
+      background: rgba(255, 255, 255, 0.1) !important;
+      transform: scale(1.1);
+    }
+
+    &:focus {
+      outline: none;
+      box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3) !important;
+    }
+  }
+}
+
+.hue-picker-panel {
+  padding: 0 !important;
+  min-width: 240px;
+
+  .hue-picker-inner {
+    padding: 14px 16px;
+  }
+
+  .hue-picker-label {
+    font-size: 0.75rem;
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    color: var(--luncher-text-secondary);
+    margin-bottom: 12px;
+  }
+}
+
+.hue-slider {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 100%;
+  height: 12px;
+  border-radius: 6px;
+  background: linear-gradient(
+    to right,
+    hsl(0 70% 50%), hsl(30 70% 50%), hsl(60 70% 50%), hsl(90 70% 50%),
+    hsl(120 70% 50%), hsl(150 70% 50%), hsl(180 70% 50%), hsl(210 70% 50%),
+    hsl(240 70% 50%), hsl(270 70% 50%), hsl(300 70% 50%), hsl(330 70% 50%), hsl(360 70% 50%)
+  );
+  outline: none;
+  cursor: pointer;
+  margin-bottom: 14px;
+
+  &::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 20px;
+    height: 20px;
+    border-radius: 50%;
+    background: white;
+    border: 2px solid rgba(0, 0, 0, 0.25);
+    cursor: pointer;
+    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
+    transition: transform 0.15s ease;
+
+    &:hover {
+      transform: scale(1.15);
+    }
+  }
+
+  &::-moz-range-thumb {
+    width: 20px;
+    height: 20px;
+    border-radius: 50%;
+    background: white;
+    border: 2px solid rgba(0, 0, 0, 0.25);
+    cursor: pointer;
+    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
+  }
+}
+
+.hue-presets {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 14px;
+
+  .hue-swatch {
+    width: 26px;
+    height: 26px;
+    border-radius: 50%;
+    border: 2px solid transparent;
+    cursor: pointer;
+    padding: 0;
+    transition: transform 0.15s ease, border-color 0.15s ease;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
+
+    &:hover {
+      transform: scale(1.15);
+    }
+
+    &.active {
+      border-color: var(--luncher-text);
+      transform: scale(1.1);
+    }
+  }
+}
+
+.hue-preview {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding-top: 4px;
+  border-top: 1px solid var(--luncher-border);
+
+  .hue-preview-chip {
+    width: 32px;
+    height: 32px;
+    border-radius: var(--luncher-radius-sm);
+    flex-shrink: 0;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
+    transition: background 0.2s ease;
+  }
+
+  span {
+    font-size: 0.8rem;
+    color: var(--luncher-text-secondary);
+  }
+}

client/src/components/HuePicker.tsx

@@ -0,0 +1,71 @@
+import { Dropdown } from 'react-bootstrap';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faPalette } from '@fortawesome/free-solid-svg-icons';
+import './HuePicker.scss';
+
+const PRESETS = [
+  { hue: 142, label: 'Zelená' },
+  { hue: 217, label: 'Modrá' },
+  { hue: 263, label: 'Fialová' },
+  { hue: 0, label: 'Červená' },
+  { hue: 28, label: 'Oranžová' },
+  { hue: 340, label: 'Růžová' },
+];
+
+type Props = {
+  accentHue: number;
+  isDark: boolean;
+  onChange: (hue: number) => void;
+};
+
+function swatchColor(hue: number, isDark: boolean): string {
+  return `hsl(${hue} 70% ${isDark ? 55 : 38}%)`;
+}
+
+export default function HuePicker({ accentHue, isDark, onChange }: Props) {
+  return (
+    <Dropdown align="end" autoClose="outside" className="hue-picker-dropdown">
+      <Dropdown.Toggle
+        as="button"
+        className="theme-toggle"
+        aria-label="Barva zvýraznění"
+        title="Barva zvýraznění"
+      >
+        <FontAwesomeIcon icon={faPalette} />
+      </Dropdown.Toggle>
+      <Dropdown.Menu className="hue-picker-panel">
+        <div className="hue-picker-inner">
+          <div className="hue-picker-label">Barva zvýraznění</div>
+          <input
+            type="range"
+            min={0}
+            max={360}
+            value={accentHue}
+            onChange={e => onChange(parseInt(e.target.value, 10))}
+            className="hue-slider"
+            aria-label="Odstín barvy zvýraznění"
+          />
+          <div className="hue-presets">
+            {PRESETS.map(p => (
+              <button
+                key={p.hue}
+                className={`hue-swatch${accentHue === p.hue ? ' active' : ''}`}
+                style={{ background: swatchColor(p.hue, isDark) }}
+                title={p.label}
+                onClick={() => onChange(p.hue)}
+                aria-label={p.label}
+              />
+            ))}
+          </div>
+          <div className="hue-preview">
+            <div
+              className="hue-preview-chip"
+              style={{ background: swatchColor(accentHue, isDark) }}
+            />
+            <span>Aktuální barva zvýraznění</span>
+          </div>
+        </div>
+      </Dropdown.Menu>
+    </Dropdown>
+  );
+}

client/src/components/PizzaOrderList.tsx

@@ -48,7 +48,7 @@ export default function PizzaOrderList({ state, orders, onDelete, creator }: Rea
                         borderTop: '2px solid var(--luncher-border)'
                     }}>
                         <td colSpan={4} style={{ padding: '16px 20px', border: 'none' }}>Celkem</td>
-                        <td style={{ padding: '16px 20px', border: 'none', textAlign: 'right', color: 'var(--luncher-primary)' }}>{`${total} Kč`}</td>
+                        <td style={{ padding: '16px 20px', border: 'none', textAlign: 'right', color: 'var(--luncher-primary)' }}>{`${total / 100} Kč`}</td>
                     </tr>
                 </tbody>
             </Table>

client/src/components/PizzaOrderRow.tsx

@@ -26,7 +26,7 @@ export default function PizzaOrderRow({ creator, order, state, onDelete, onFeeMo
         <td>{order.customer}</td>
         <td>{order.pizzaList!.map<React.ReactNode>(pizzaOrder =>
             <span key={pizzaOrder.name}>
-                {`${pizzaOrder.name}, ${pizzaOrder.size} (${pizzaOrder.price} Kč)`}
+                {`${pizzaOrder.name}, ${pizzaOrder.size} (${pizzaOrder.price / 100} Kč)`}
                 {auth?.login === order.customer && state === PizzaDayState.CREATED &&
                     <span title='Odstranit'>
                         <FontAwesomeIcon onClick={() => {
@@ -38,10 +38,10 @@ export default function PizzaOrderRow({ creator, order, state, onDelete, onFeeMo
             .reduce((prev, curr, index) => [prev, <br key={`br-${index}`} />, curr])}
         </td>
         <td style={{ maxWidth: "200px" }}>{order.note ?? '-'}</td>
-        <td style={{ maxWidth: "200px" }}>{order.fee?.price ? `${order.fee.price} Kč${order.fee.text ? ` (${order.fee.text})` : ''}` : '-'}</td>
+        <td style={{ maxWidth: "200px" }}>{order.fee?.price ? `${order.fee.price / 100} Kč${order.fee.text ? ` (${order.fee.text})` : ''}` : '-'}</td>
         <td>
-            {order.totalPrice} Kč{auth?.login === creator && state === PizzaDayState.CREATED && <span title='Nastavit příplatek'><FontAwesomeIcon onClick={() => { setIsFeeModalOpen(true) }} className='action-icon' icon={faMoneyBill1} /></span>}
+            {order.totalPrice / 100} Kč{auth?.login === creator && state === PizzaDayState.CREATED && <span title='Nastavit příplatek'><FontAwesomeIcon onClick={() => { setIsFeeModalOpen(true) }} className='action-icon' icon={faMoneyBill1} /></span>}
         </td>
-        <PizzaAdditionalFeeModal customerName={order.customer} isOpen={isFeeModalOpen} onClose={() => setIsFeeModalOpen(false)} onSave={saveFees} initialValues={{ text: order.fee?.text, price: order.fee?.price?.toString() }} />
+        <PizzaAdditionalFeeModal customerName={order.customer} isOpen={isFeeModalOpen} onClose={() => setIsFeeModalOpen(false)} onSave={saveFees} initialValues={{ text: order.fee?.text, price: order.fee?.price != null ? String(order.fee.price / 100) : undefined }} />
     </>
 }

client/src/components/modals/ConfirmModal.tsx

@@ -0,0 +1,26 @@
+import { Modal, Button } from "react-bootstrap";
+
+type Props = {
+    isOpen: boolean;
+    title: string;
+    message: string;
+    confirmLabel?: string;
+    confirmVariant?: string;
+    onConfirm: () => void;
+    onClose: () => void;
+};
+
+export default function ConfirmModal({ isOpen, title, message, confirmLabel = "Potvrdit", confirmVariant = "primary", onConfirm, onClose }: Readonly<Props>) {
+    return (
+        <Modal show={isOpen} onHide={onClose}>
+            <Modal.Header closeButton>
+                <Modal.Title>{title}</Modal.Title>
+            </Modal.Header>
+            <Modal.Body>{message}</Modal.Body>
+            <Modal.Footer>
+                <Button variant="secondary" onClick={onClose}>Zrušit</Button>
+                <Button variant={confirmVariant} onClick={onConfirm}>{confirmLabel}</Button>
+            </Modal.Footer>
+        </Modal>
+    );
+}

client/src/components/modals/EditGroupFeesModal.tsx

@@ -9,18 +9,23 @@ type Props = {
     onSaved: (data: any) => void;
 };
 
-function parseNum(s: string): number {
+function parseHal(s: string): number {
     const n = parseFloat(s.replace(',', '.'));
-    return isNaN(n) || n < 0 ? 0 : Math.round(n * 100) / 100;
+    return isNaN(n) || n < 0 ? 0 : Math.round(n * 100);
+}
+
+function parsePercent(s: string): number {
+    const n = parseFloat(s.replace(',', '.'));
+    return isNaN(n) || n < 0 ? 0 : Math.round(n);
 }
 
 function computeMemberTotal(member: OrderGroupMember, feeShare: number, discountType: string, discountValue: number, memberCount: number): number {
     const base = member.amount ?? 0;
     const surcharge = member.surchargeAmount ?? 0;
     const discount = discountType === 'percent'
-        ? Math.round((base + surcharge) * discountValue / 100 * 100) / 100
-        : Math.round(discountValue / memberCount * 100) / 100;
-    return Math.round((base + surcharge + feeShare - discount) * 100) / 100;
+        ? Math.round((base + surcharge) * discountValue / 100)
+        : Math.round(discountValue / memberCount);
+    return base + surcharge + feeShare - discount;
 }
 
 export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }: Readonly<Props>) {
@@ -34,23 +39,25 @@ export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }:
 
     useEffect(() => {
         if (!isOpen) return;
-        setFees(group.fees ? String(group.fees) : '');
-        setShipping(group.shipping ? String(group.shipping) : '');
-        setTip(group.tip ? String(group.tip) : '');
+        setFees(group.fees ? String(group.fees / 100) : '');
+        setShipping(group.shipping ? String(group.shipping / 100) : '');
+        setTip(group.tip ? String(group.tip / 100) : '');
         setDiscountType((group.discountType as 'percent' | 'fixed') ?? 'percent');
-        setDiscountValue(group.discountValue ? String(group.discountValue) : '');
+        setDiscountValue(group.discountValue
+            ? ((group.discountType as string) === 'fixed' ? String(group.discountValue / 100) : String(group.discountValue))
+            : '');
         setError(null);
     }, [isOpen, group]);
 
     const memberEntries = Object.entries(group.members) as [string, OrderGroupMember][];
     const memberCount = memberEntries.length;
 
-    const feesNum = parseNum(fees);
-    const shippingNum = parseNum(shipping);
-    const tipNum = parseNum(tip);
-    const discountNum = parseNum(discountValue);
+    const feesNum = parseHal(fees);
+    const shippingNum = parseHal(shipping);
+    const tipNum = parseHal(tip);
+    const discountNum = discountType === 'percent' ? parsePercent(discountValue) : parseHal(discountValue);
     const totalFees = feesNum + shippingNum + tipNum;
-    const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount * 100) / 100 : 0;
+    const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount) : 0;
 
     const handleSave = async () => {
         setError(null);
@@ -64,7 +71,7 @@ export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }:
                     tip: tipNum,
                     discountType: discountNum > 0 ? discountType : undefined,
                     discountValue: discountNum > 0 ? discountNum : undefined,
-                },
+                }
             });
             if (res.error) {
                 setError((res.error as any).error || 'Nastala chyba');
@@ -143,7 +150,7 @@ export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }:
                 </div>
 
                 <hr />
-                <h6>Náhled celkových částek ({memberCount} členů, {feeShare > 0 ? `poplatek ${feeShare} Kč/os.` : 'bez poplatku'})</h6>
+                <h6>Náhled celkových částek ({memberCount} členů, {feeShare > 0 ? `poplatek ${feeShare / 100} Kč/os.` : 'bez poplatku'})</h6>
                 <Table size="sm" bordered>
                     <thead>
                         <tr>
@@ -161,18 +168,18 @@ export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }:
                             const surcharge = member.surchargeAmount ?? 0;
                             const discount = discountNum > 0
                                 ? (discountType === 'percent'
-                                    ? Math.round((base + surcharge) * discountNum / 100 * 100) / 100
-                                    : Math.round(discountNum / memberCount * 100) / 100)
+                                    ? Math.round((base + surcharge) * discountNum / 100)
+                                    : Math.round(discountNum / memberCount))
                                 : 0;
                             const total = computeMemberTotal(member, feeShare, discountType, discountNum, memberCount);
                             return (
                                 <tr key={login}>
                                     <td><strong>{login}</strong></td>
-                                    <td className="text-end">{base > 0 ? `${base} Kč` : '—'}</td>
-                                    <td className="text-end">{surcharge > 0 ? `${surcharge} Kč` : '—'}</td>
-                                    <td className="text-end">{feeShare > 0 ? `${feeShare} Kč` : '—'}</td>
-                                    <td className="text-end text-danger">{discount > 0 ? `-${discount} Kč` : '—'}</td>
-                                    <td className="text-end fw-bold">{total > 0 ? `${total} Kč` : '—'}</td>
+                                    <td className="text-end">{base > 0 ? `${base / 100} Kč` : '—'}</td>
+                                    <td className="text-end">{surcharge > 0 ? `${surcharge / 100} Kč` : '—'}</td>
+                                    <td className="text-end">{feeShare > 0 ? `${feeShare / 100} Kč` : '—'}</td>
+                                    <td className="text-end text-danger">{discount > 0 ? `-${discount / 100} Kč` : '—'}</td>
+                                    <td className="text-end fw-bold">{total > 0 ? `${total / 100} Kč` : '—'}</td>
                                 </tr>
                             );
                         })}

client/src/components/modals/PayForAllModal.tsx

@@ -33,9 +33,7 @@ function parseAmount(s: string): number | null {
     if (!s || s.trim().length === 0) return null;
     const n = parseFloat(s);
     if (isNaN(n) || n < 0) return null;
-    const parts = s.split('.');
-    if (parts.length === 2 && parts[1].length > 2) return null;
-    return Math.round(n * 100) / 100;
+    return Math.round(n * 100);
 }
 
 export default function PayForAllModal({ isOpen, onClose, locationName, locationChoices, menu, payerLogin, bankAccount, bankAccountHolder }: Readonly<Props>) {
@@ -55,11 +53,11 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
             let baseAmountParseFailed = false;
             if (menu) {
                 for (const idx of selectedFoods) {
-                    const price = parsePriceCzk(menu.food?.[idx]?.price);
-                    if (price === null) {
+                    const priceKc = parsePriceCzk(menu.food?.[idx]?.price);
+                    if (priceKc === null) {
                         baseAmountParseFailed = true;
                     } else {
-                        baseAmount += price;
+                        baseAmount += Math.round(priceKc * 100);
                     }
                 }
             }
@@ -84,19 +82,19 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
         if (includedDiners.length === 0) return 0;
         const tip = parseAmount(tipTotal);
         if (tip === null || tip === 0) return 0;
-        const totalPeople = includedDiners.length + 1; // +1 for payer
-        return Math.round((tip / totalPeople) * 100) / 100;
+        const totalPeople = includedDiners.length + 1;
+        return Math.round(tip / totalPeople);
     })();
     const payerTipShare = (() => {
         const tip = parseAmount(tipTotal);
         if (!tip) return 0;
-        return Math.round((tip - tipPerPerson * includedDiners.length) * 100) / 100;
+        return tip - tipPerPerson * includedDiners.length;
     })();
 
     const getTotal = (d: DinerEntry): number => {
         const surcharge = parseAmount(d.surchargeAmount) ?? 0;
         const tip = d.login === payerLogin ? payerTipShare : tipPerPerson;
-        return Math.round((d.baseAmount + surcharge + tip) * 100) / 100;
+        return d.baseAmount + surcharge + tip;
     };
 
     const handleInclude = useCallback((login: string, checked: boolean) => {
@@ -122,11 +120,6 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
                 setError(`Celková částka pro ${d.login} musí být kladná`);
                 return;
             }
-            const amountStr = total.toString();
-            if (amountStr.includes('.') && amountStr.split('.')[1].length > 2) {
-                setError(`Částka pro ${d.login} má více než 2 desetinná místa`);
-                return;
-            }
             const foods = d.selectedFoods.map(i => menu?.food?.[i]?.name).filter(Boolean).join(', ');
             const purposeBase = `Oběd ${locationName}${foods ? ` — ${foods}` : ''}`;
             recipients.push({
@@ -226,7 +219,7 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
                                             <td>
                                                 <small>
                                                     {foodNames || <span className="text-muted">—</span>}
-                                                    {hasMenu && d.baseAmount > 0 && <span className="text-muted"> ({d.baseAmount} Kč)</span>}
+                                                    {hasMenu && d.baseAmount > 0 && <span className="text-muted"> ({d.baseAmount / 100} Kč)</span>}
                                                     {d.baseAmountParseFailed && <span className="text-warning"> ⚠</span>}
                                                 </small>
                                             </td>
@@ -254,10 +247,10 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
                                                 </div>
                                             </td>
                                             <td className="text-end">
-                                                {(() => { const s = isPayer ? payerTipShare : tipPerPerson; return s > 0 ? `${s} Kč` : '—'; })()}
+                                                {(() => { const s = isPayer ? payerTipShare : tipPerPerson; return s > 0 ? `${s / 100} Kč` : '—'; })()}
                                             </td>
                                             <td className="text-end fw-bold">
-                                                {`${total} Kč`}
+                                                {`${total / 100} Kč`}
                                             </td>
                                         </tr>
                                     );
@@ -278,7 +271,7 @@ export default function PayForAllModal({ isOpen, onClose, locationName, location
                             />
                             <small className="text-muted">
                                 {includedDiners.length > 0 && tipPerPerson > 0
-                                    ? `(${tipPerPerson} Kč / osoba)`
+                                    ? `(${tipPerPerson / 100} Kč / osoba)`
                                     : ''}
                             </small>
                         </div>

client/src/components/modals/PayForGroupModal.tsx

@@ -5,6 +5,7 @@ import { generateQr, OrderGroup, OrderGroupMember, QrRecipient } from "../../../
 type Props = {
     isOpen: boolean;
     onClose: () => void;
+    onSuccess?: () => void;
     group: OrderGroup;
     payerLogin: string;
     bankAccount: string;
@@ -18,7 +19,7 @@ type DinerEntry = {
     included: boolean;
 };
 
-export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, bankAccount, bankAccountHolder, groupId }: Readonly<Props>) {
+export default function PayForGroupModal({ isOpen, onClose, onSuccess, group, payerLogin, bankAccount, bankAccountHolder, groupId }: Readonly<Props>) {
     const [diners, setDiners] = useState<DinerEntry[]>([]);
     const [error, setError] = useState<string | null>(null);
     const [loading, setLoading] = useState(false);
@@ -41,7 +42,7 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
     const shipping = group.shipping ?? 0;
     const tip = group.tip ?? 0;
     const totalFees = fees + shipping + tip;
-    const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount * 100) / 100 : 0;
+    const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount) : 0;
 
     const getMemberTotal = (entry: DinerEntry): number => {
         const base = entry.member.amount ?? 0;
@@ -50,10 +51,10 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
         const discountValue = group.discountValue ?? 0;
         const discount = discountValue > 0
             ? (discountType === 'percent'
-                ? Math.round((base + surcharge) * discountValue / 100 * 100) / 100
-                : Math.round(discountValue / memberCount * 100) / 100)
+                ? Math.round((base + surcharge) * discountValue / 100)
+                : Math.round(discountValue / memberCount))
             : 0;
-        return Math.round((base + surcharge + feeShare - discount) * 100) / 100;
+        return base + surcharge + feeShare - discount;
     };
 
     const includedNonPayers = diners.filter(d => d.included && d.login !== payerLogin);
@@ -73,14 +74,10 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
                 setError(`Celková částka pro ${d.login} musí být kladná`);
                 return;
             }
-            const amountStr = total.toString();
-            if (amountStr.includes('.') && amountStr.split('.')[1].length > 2) {
-                setError(`Částka pro ${d.login} má více než 2 desetinná místa`);
-                return;
-            }
+            const note = d.member.note?.trim();
             recipients.push({
                 login: d.login,
-                purpose: `Objednávka ${group.name}`.substring(0, 60),
+                purpose: note ? note.replace(/[^\x00-\xff*]/g, '').replace(/\*/g, '').substring(0, 60) : `Objednávka ${group.name}`.substring(0, 60),
                 amount: total,
             });
         }
@@ -99,6 +96,7 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
                 setError((response.error as any).error || 'Nastala chyba při generování QR kódů');
             } else {
                 setSuccess(true);
+                onSuccess?.();
                 setTimeout(() => onClose(), 2000);
             }
         } catch (e: any) {
@@ -132,15 +130,15 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
 
                         {hasFees && (
                             <div className="d-flex gap-3 mb-2 text-muted" style={{ fontSize: '0.9em' }}>
-                                {fees > 0 && <span>Poplatky: <strong>{fees} Kč</strong></span>}
-                                {shipping > 0 && <span>Doprava: <strong>{shipping} Kč</strong></span>}
-                                {tip > 0 && <span>Spropitné: <strong>{tip} Kč</strong></span>}
-                                <span>→ {feeShare} Kč/os.</span>
+                                {fees > 0 && <span>Poplatky: <strong>{fees / 100} Kč</strong></span>}
+                                {shipping > 0 && <span>Doprava: <strong>{shipping / 100} Kč</strong></span>}
+                                {tip > 0 && <span>Spropitné: <strong>{tip / 100} Kč</strong></span>}
+                                <span>→ {feeShare / 100} Kč/os.</span>
                             </div>
                         )}
                         {group.discountValue != null && group.discountValue > 0 && (
                             <div className="mb-2 text-success" style={{ fontSize: '0.9em' }}>
-                                Sleva: {group.discountType === 'percent' ? `${group.discountValue}%` : `${group.discountValue} Kč`}
+                                Sleva: {group.discountType === 'percent' ? `${group.discountValue}%` : `${group.discountValue / 100} Kč`}
                             </div>
                         )}
 
@@ -180,18 +178,18 @@ export default function PayForGroupModal({ isOpen, onClose, group, payerLogin, b
                                                 )}
                                             </td>
                                             <td className="text-end">
-                                                {(d.member.amount ?? 0) > 0 ? `${d.member.amount} Kč` : <span className="text-muted">—</span>}
+                                                {(d.member.amount ?? 0) > 0 ? `${d.member.amount! / 100} Kč` : <span className="text-muted">—</span>}
                                             </td>
                                             <td className="text-end">
-                                                {surcharge > 0 ? `${surcharge} Kč` : <span className="text-muted">—</span>}
+                                                {surcharge > 0 ? `${surcharge / 100} Kč` : <span className="text-muted">—</span>}
                                             </td>
                                             {hasFees && (
                                                 <td className="text-end">
-                                                    {feeShare > 0 ? `${feeShare} Kč` : '—'}
+                                                    {feeShare > 0 ? `${feeShare / 100} Kč` : '—'}
                                                 </td>
                                             )}
                                             <td className="text-end fw-bold">
-                                                {total > 0 ? `${total} Kč` : <span className="text-muted">—</span>}
+                                                {total > 0 ? `${total / 100} Kč` : <span className="text-muted">—</span>}
                                             </td>
                                         </tr>
                                     );

client/src/components/modals/PizzaAdditionalFeeModal.tsx

@@ -15,12 +15,12 @@ export default function PizzaAdditionalFeeModal({ customerName, isOpen, onClose,
     const priceRef = useRef<HTMLInputElement>(null);
 
     const doSubmit = () => {
-        onSave(customerName, textRef.current?.value, Number.parseInt(priceRef.current?.value ?? "0"));
+        onSave(customerName, textRef.current?.value, Math.round(Number.parseFloat(priceRef.current?.value ?? "0") * 100));
     }
 
     const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
         if (e.key === 'Enter') {
-            onSave(customerName, textRef.current?.value, Number.parseInt(priceRef.current?.value ?? "0"));
+            onSave(customerName, textRef.current?.value, Math.round(Number.parseFloat(priceRef.current?.value ?? "0") * 100));
         }
     }
 

client/src/context/settings.tsx

@@ -4,6 +4,8 @@ const BANK_ACCOUNT_NUMBER_KEY = 'bank_account_number';
 const BANK_ACCOUNT_HOLDER_KEY = 'bank_account_holder_name';
 const HIDE_SOUPS_KEY = 'hide_soups';
 const THEME_KEY = 'theme_preference';
+const ACCENT_HUE_KEY = 'accent_hue';
+const LEGACY_COLOR_THEME_KEY = 'color_theme';
 
 export type ThemePreference = 'system' | 'light' | 'dark';
 
@@ -12,10 +14,13 @@ export type SettingsContextProps = {
   holderName?: string,
   hideSoups?: boolean,
   themePreference: ThemePreference,
+  accentHue: number,
+  effectiveDark: boolean,
   setBankAccountNumber: (accountNumber?: string) => void,
   setBankAccountHolderName: (holderName?: string) => void,
   setHideSoupsOption: (hideSoups?: boolean) => void,
   setThemePreference: (theme: ThemePreference) => void,
+  setAccentHue: (hue: number) => void,
 }
 
 type ContextProps = {
@@ -45,11 +50,74 @@ function getInitialTheme(): ThemePreference {
   return 'system';
 }
 
+function getInitialAccentHue(): number {
+  try {
+    const saved = localStorage.getItem(ACCENT_HUE_KEY);
+    if (saved !== null) {
+      const n = parseInt(saved, 10);
+      if (!isNaN(n) && n >= 0 && n <= 360) return n;
+    }
+    // Migrace ze starého string formátu (green/blue/purple)
+    const old = localStorage.getItem(LEGACY_COLOR_THEME_KEY);
+    if (old === 'blue') return 217;
+    if (old === 'purple') return 263;
+  } catch {
+    // localStorage nedostupný
+  }
+  return 142;
+}
+
+// Převod HSL na relativní jas dle WCAG (pro výpočet kontrastu s bílým textem)
+function hslToRelativeLuminance(h: number, s: number, l: number): number {
+  const sn = s / 100, ln = l / 100;
+  const a = sn * Math.min(ln, 1 - ln);
+  const ch = (n: number) => {
+    const k = (n + h / 30) % 12;
+    return ln - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);
+  };
+  const toLinear = (c: number) => c <= 0.04045 ? c / 12.92 : Math.pow((c + 0.055) / 1.055, 2.4);
+  return 0.2126 * toLinear(ch(0)) + 0.7152 * toLinear(ch(8)) + 0.0722 * toLinear(ch(4));
+}
+
+// Najde nejnižší světlost, při které má barva dostatečný kontrast s bílým textem (WCAG AA 4.5:1)
+function adjustedL(hue: number, sat: number, targetL: number): number {
+  let l = targetL;
+  while (l >= 5) {
+    const lum = hslToRelativeLuminance(hue, sat, l);
+    if (1.05 / (lum + 0.05) >= 4.5) return l;
+    l -= 1;
+  }
+  return l;
+}
+
+function applyAccentColors(hue: number, isDark: boolean): void {
+  const sat = 70;
+  const baseL = adjustedL(hue, sat, isDark ? 55 : 38);
+  const hoverL = isDark ? Math.min(baseL + 10, 80) : Math.max(baseL - 10, 10);
+  const root = document.documentElement;
+  root.style.setProperty('--luncher-primary', `hsl(${hue} ${sat}% ${baseL}%)`);
+  root.style.setProperty('--luncher-primary-hover', `hsl(${hue} ${sat}% ${hoverL}%)`);
+  root.style.setProperty('--luncher-primary-light', isDark
+    ? `hsl(${hue} 60% 12%)`
+    : `hsl(${hue} 60% 92%)`);
+  root.style.setProperty('--luncher-action-icon', `hsl(${hue} ${sat}% ${baseL}%)`);
+  root.style.setProperty('--luncher-success', `hsl(${hue} ${sat}% ${baseL}%)`);
+}
+
 function useProvideSettings(): SettingsContextProps {
   const [bankAccount, setBankAccount] = useState<string | undefined>();
   const [holderName, setHolderName] = useState<string | undefined>();
   const [hideSoups, setHideSoups] = useState<boolean | undefined>();
   const [themePreference, setTheme] = useState<ThemePreference>(getInitialTheme);
+  const [accentHue, setHue] = useState<number>(getInitialAccentHue);
+  const [effectiveDark, setEffectiveDark] = useState<boolean>(() => {
+    try {
+      const pref = localStorage.getItem(THEME_KEY) as ThemePreference | null;
+      if (pref === 'dark') return true;
+      if (pref === 'light') return false;
+    } catch { /* noop */ }
+    return window.matchMedia?.('(prefers-color-scheme: dark)').matches ?? false;
+  });
 
   useEffect(() => {
     const accountNumber = localStorage.getItem(BANK_ACCOUNT_NUMBER_KEY);
@@ -95,24 +163,27 @@ function useProvideSettings(): SettingsContextProps {
   }, [themePreference]);
 
   useEffect(() => {
-    const applyTheme = (theme: 'light' | 'dark') => {
-      document.documentElement.setAttribute('data-bs-theme', theme);
+    const applyTheme = (dark: boolean) => {
+      document.documentElement.setAttribute('data-bs-theme', dark ? 'dark' : 'light');
+      setEffectiveDark(dark);
     };
-
     if (themePreference === 'system') {
-      const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
-      applyTheme(mediaQuery.matches ? 'dark' : 'light');
-
-      const handler = (e: MediaQueryListEvent) => {
-        applyTheme(e.matches ? 'dark' : 'light');
-      };
-      mediaQuery.addEventListener('change', handler);
-      return () => mediaQuery.removeEventListener('change', handler);
+      const mq = window.matchMedia('(prefers-color-scheme: dark)');
+      applyTheme(mq.matches);
+      const handler = (e: MediaQueryListEvent) => applyTheme(e.matches);
+      mq.addEventListener('change', handler);
+      return () => mq.removeEventListener('change', handler);
     } else {
-      applyTheme(themePreference);
+      applyTheme(themePreference === 'dark');
     }
   }, [themePreference]);
 
+  // Aplikuje accent barvy při změně hue nebo přepnutí světlý/tmavý
+  useEffect(() => {
+    localStorage.setItem(ACCENT_HUE_KEY, String(accentHue));
+    applyAccentColors(accentHue, effectiveDark);
+  }, [accentHue, effectiveDark]);
+
   function setBankAccountNumber(bankAccount?: string) {
     setBankAccount(bankAccount);
   }
@@ -129,14 +200,21 @@ function useProvideSettings(): SettingsContextProps {
     setTheme(theme);
   }
 
+  function setAccentHue(hue: number) {
+    setHue(hue);
+  }
+
   return {
     bankAccount,
     holderName,
     hideSoups,
     themePreference,
+    accentHue,
+    effectiveDark,
     setBankAccountNumber,
     setBankAccountHolderName,
     setHideSoupsOption,
     setThemePreference,
+    setAccentHue,
   }
 }

client/src/context/socket.js

@@ -8,12 +8,25 @@ if (process.env.NODE_ENV === 'development') {
     socketPath = undefined;
 } else {
     socketUrl = `${globalThis.location.host}`;
-    socketPath = `${globalThis.location.pathname}socket.io`;
+    socketPath = '/socket.io';
 }
 
 export const socket = socketio.connect(socketUrl, { path: socketPath, transports: ["websocket"] });
 export const SocketContext = React.createContext();
 
+// Prohlížeče throttlují setTimeout v neaktivních tabech, což zdržuje automatické
+// znovupřipojení socket.io. Po návratu do tabu nebo focusu okna se připojíme hned.
+document.addEventListener('visibilitychange', () => {
+    if (document.visibilityState === 'visible' && !socket.connected) {
+        socket.connect();
+    }
+});
+window.addEventListener('focus', () => {
+    if (!socket.connected) {
+        socket.connect();
+    }
+});
+
 // Konstanty websocket eventů, musí odpovídat těm na serveru!
 export const EVENT_CONNECT = 'connect';
 export const EVENT_DISCONNECT = 'disconnect';

client/src/pages/OrderGroupsPage.tsx

@@ -1,4 +1,4 @@
-import { useContext, useEffect, useRef, useState } from 'react';
+import { useContext, useEffect, useState } from 'react';
 import { Alert, Badge, Button, Card, Form, Modal, OverlayTrigger, Table, Tooltip } from 'react-bootstrap';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { faTrashCan } from '@fortawesome/free-regular-svg-icons';
@@ -48,7 +48,6 @@ export default function OrderGroupsPage() {
     const [feesModal, setFeesModal] = useState<OrderGroup | null>(null);
     const [confirmOrderGroup, setConfirmOrderGroup] = useState<OrderGroup | null>(null);
     const [pageError, setPageError] = useState<string | null>(null);
-    const inputRef = useRef<HTMLInputElement>(null);
 
     const fetchData = async () => {
         try {
@@ -74,6 +73,12 @@ export default function OrderGroupsPage() {
         return () => { socket.off(EVENT_MESSAGE); };
     }, [socket]);
 
+    useEffect(() => {
+        const onReconnect = () => fetchData();
+        socket.io.on('reconnect', onReconnect);
+        return () => { socket.io.off('reconnect', onReconnect); };
+    }, [socket]);
+
     const refresh = async (fn: () => Promise<any>): Promise<boolean> => {
         setPageError(null);
         const result = await fn();
@@ -86,7 +91,6 @@ export default function OrderGroupsPage() {
             setData(result.data);
             socket.emit?.('message', result.data as ClientData);
         }
-        await fetchData();
         return true;
     };
 
@@ -125,7 +129,7 @@ export default function OrderGroupsPage() {
             setPageError('Zadejte platnou kladnou částku');
             return;
         }
-        const ok = await refresh(() => updateGroupMember({ body: { id: groupId, login, amount: n } }));
+        const ok = await refresh(() => updateGroupMember({ body: { id: groupId, login, amount: Math.round(n * 100) } }));
         if (ok) setEditAmounts(prev => { const next = { ...prev }; delete next[key]; return next; });
     };
 
@@ -145,7 +149,7 @@ export default function OrderGroupsPage() {
             setPageError('Zadejte platnou výši příplatku');
             return;
         }
-        const ok = await refresh(() => updateGroupMember({ body: { id: groupId, login, surchargeText, surchargeAmount: rawAmount === '' ? 0 : surchargeAmount } }));
+        const ok = await refresh(() => updateGroupMember({ body: { id: groupId, login, surchargeText, surchargeAmount: rawAmount === '' ? 0 : Math.round(surchargeAmount * 100) } }));
         if (ok) setEditSurcharges(prev => { const next = { ...prev }; delete next[key]; return next; });
     };
 
@@ -210,7 +214,7 @@ export default function OrderGroupsPage() {
                 )}
 
                 <div className="content-wrapper">
-                    <div className="content">
+                    <div className="content" style={{ maxWidth: 1200 }}>
                         {/* Vytvoření nové skupiny */}
                         <div className="choice-section fade-in mb-4">
                             <h5>Vytvořit skupinu</h5>
@@ -254,17 +258,17 @@ export default function OrderGroupsPage() {
                             const editingTimes = group.id in editTimes;
 
                             const totalFees = (group.fees ?? 0) + (group.shipping ?? 0) + (group.tip ?? 0);
-                            const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount * 100) / 100 : 0;
+                            const feeShare = memberCount > 0 ? Math.round(totalFees / memberCount) : 0;
                             const getMemberTotal = (m: OrderGroupMember) => {
                                 const base = m.amount ?? 0;
                                 const surcharge = m.surchargeAmount ?? 0;
                                 const dv = group.discountValue ?? 0;
                                 const discount = dv > 0
                                     ? (group.discountType === 'percent'
-                                        ? Math.round((base + surcharge) * dv / 100 * 100) / 100
-                                        : Math.round(dv / memberCount * 100) / 100)
+                                        ? Math.round((base + surcharge) * dv / 100)
+                                        : Math.round(dv / memberCount))
                                     : 0;
-                                return Math.round((base + surcharge + feeShare - discount) * 100) / 100;
+                                return base + surcharge + feeShare - discount;
                             };
 
                             return (
@@ -296,7 +300,7 @@ export default function OrderGroupsPage() {
                                             )}
                                             {isCreator && isOrdered && (
                                                 <>
-                                                    {settings?.bankAccount && settings?.holderName && (
+                                                    {settings?.bankAccount && settings?.holderName && !group.qrGenerated && (
                                                         <Button variant="primary" size="sm" onClick={() => setPayModal(group)}>
                                                             <FontAwesomeIcon icon={faBasketShopping} className="me-1" />
                                                             Generovat QR
@@ -320,10 +324,10 @@ export default function OrderGroupsPage() {
                                             <thead>
                                                 <tr>
                                                     <th>Člen</th>
-                                                    <th style={{ width: 120 }}>Částka (Kč)</th>
-                                                    <th style={{ width: 180 }}>Příplatek</th>
+                                                    <th style={{ width: 180 }}>Částka (bez slev)</th>
+                                                    <th style={{ width: 220 }}>Příplatek</th>
                                                     <th>Poznámka</th>
-                                                    <th style={{ width: 90 }}>Celkem</th>
+                                                    <th style={{ width: 160 }}>Celkem (s poplatky)</th>
                                                     <th style={{ width: 40 }}></th>
                                                 </tr>
                                             </thead>
@@ -356,24 +360,23 @@ export default function OrderGroupsPage() {
                                                                 {canEdit && editingAmount ? (
                                                                     <div className="d-flex gap-1">
                                                                         <Form.Control
-                                                                            ref={memberLogin === login ? inputRef : undefined}
                                                                             type="number"
                                                                             size="sm"
                                                                             value={editAmounts[key]}
                                                                             onChange={e => setEditAmounts(prev => ({ ...prev, [key]: e.target.value }))}
                                                                             onKeyDown={e => { e.stopPropagation(); if (e.key === 'Enter') handleSaveAmount(group.id, memberLogin); if (e.key === 'Escape') setEditAmounts(prev => { const n = { ...prev }; delete n[key]; return n; }); }}
-                                                                            style={{ width: 75 }}
-                                                                            autoFocus={memberLogin === login}
+                                                                            style={{ width: 95 }}
+                                                                            autoFocus
                                                                         />
                                                                         <Button size="sm" variant="outline-success" onClick={() => handleSaveAmount(group.id, memberLogin)}>✓</Button>
                                                                     </div>
                                                                 ) : (
                                                                     <span
                                                                         style={{ cursor: canEdit ? 'pointer' : undefined }}
-                                                                        onClick={() => canEdit && setEditAmounts(prev => ({ ...prev, [key]: String(member.amount ?? '') }))}
+                                                                        onClick={() => canEdit && setEditAmounts(prev => ({ ...prev, [key]: member.amount != null ? String(member.amount / 100) : '' }))}
                                                                         title={canEdit ? 'Klikněte pro úpravu' : undefined}
                                                                     >
-                                                                        {member.amount != null ? `${member.amount} Kč` : <span className="text-muted">—</span>}
+                                                                        {member.amount != null ? `${member.amount / 100} Kč` : <span className="text-muted">—</span>}
                                                                     </span>
                                                                 )}
                                                             </td>
@@ -404,11 +407,11 @@ export default function OrderGroupsPage() {
                                                                 ) : (
                                                                     <span
                                                                         style={{ cursor: canEdit ? 'pointer' : undefined }}
-                                                                        onClick={() => canEdit && setEditSurcharges(prev => ({ ...prev, [key]: { text: member.surchargeText ?? '', amount: member.surchargeAmount != null ? String(member.surchargeAmount) : '' } }))}
+                                                                        onClick={() => canEdit && setEditSurcharges(prev => ({ ...prev, [key]: { text: member.surchargeText ?? '', amount: member.surchargeAmount != null ? String(member.surchargeAmount / 100) : '' } }))}
                                                                         title={canEdit ? 'Klikněte pro úpravu příplatku' : undefined}
                                                                     >
                                                                         {member.surchargeAmount != null && member.surchargeAmount > 0 ? (
-                                                                            <small>{member.surchargeText ? `${member.surchargeText}: ` : ''}<strong>{member.surchargeAmount} Kč</strong></small>
+                                                                            <small>{member.surchargeText ? `${member.surchargeText}: ` : ''}<strong>{member.surchargeAmount / 100} Kč</strong></small>
                                                                         ) : (
                                                                             <small className="text-muted">—</small>
                                                                         )}
@@ -440,7 +443,7 @@ export default function OrderGroupsPage() {
                                                             </td>
                                                             <td className="text-end">
                                                                 <small className={memberTotal > 0 ? 'fw-bold' : 'text-muted'}>
-                                                                    {memberTotal > 0 ? `${memberTotal} Kč` : '—'}
+                                                                    {memberTotal > 0 ? `${memberTotal / 100} Kč` : '—'}
                                                                 </small>
                                                             </td>
                                                             <td>
@@ -459,18 +462,35 @@ export default function OrderGroupsPage() {
                                                     );
                                                 })}
                                             </tbody>
+                                            {(() => {
+                                                const sumBase = memberEntries.reduce((sum, [, m]) => sum + (m.amount ?? 0) + (m.surchargeAmount ?? 0), 0);
+                                                const dv = group.discountValue ?? 0;
+                                                const totalDiscount = dv > 0
+                                                    ? (group.discountType === 'percent' ? Math.round(sumBase * dv / 100) : dv)
+                                                    : 0;
+                                                const groupTotal = sumBase + totalFees - totalDiscount;
+                                                return groupTotal > 0 ? (
+                                                    <tfoot>
+                                                        <tr style={{ fontWeight: 700, borderTop: '2px solid var(--luncher-border)' }}>
+                                                            <td colSpan={4} className="text-end" style={{ fontSize: '0.9em' }}>Celkem za skupinu:</td>
+                                                            <td className="text-end">{groupTotal / 100} Kč</td>
+                                                            <td></td>
+                                                        </tr>
+                                                    </tfoot>
+                                                ) : null;
+                                            })()}
                                         </Table>
 
                                         {/* Souhrn poplatků a slevy */}
                                         {(totalFees > 0 || (group.discountValue != null && group.discountValue > 0)) && (
                                             <div className="px-3 py-2 border-top d-flex gap-3 flex-wrap" style={{ fontSize: '0.85em', color: 'var(--luncher-text-muted)' }}>
-                                                {group.fees != null && group.fees > 0 && <span>Poplatky: <strong>{group.fees} Kč</strong></span>}
-                                                {group.shipping != null && group.shipping > 0 && <span>Doprava: <strong>{group.shipping} Kč</strong></span>}
-                                                {group.tip != null && group.tip > 0 && <span>Spropitné: <strong>{group.tip} Kč</strong></span>}
-                                                {feeShare > 0 && <span>→ <strong>{feeShare} Kč</strong>/os.</span>}
+                                                {group.fees != null && group.fees > 0 && <span>Poplatky: <strong>{group.fees / 100} Kč</strong></span>}
+                                                {group.shipping != null && group.shipping > 0 && <span>Doprava: <strong>{group.shipping / 100} Kč</strong></span>}
+                                                {group.tip != null && group.tip > 0 && <span>Spropitné: <strong>{group.tip / 100} Kč</strong></span>}
+                                                {feeShare > 0 && <span>→ <strong>{feeShare / 100} Kč</strong>/os.</span>}
                                                 {group.discountValue != null && group.discountValue > 0 && (
                                                     <span className="text-success">
-                                                        Sleva: <strong>{group.discountType === 'percent' ? `${group.discountValue}%` : `${group.discountValue} Kč`}</strong>
+                                                        Sleva: <strong>{group.discountType === 'percent' ? `${group.discountValue}%` : `${group.discountValue / 100} Kč`}</strong>
                                                     </span>
                                                 )}
                                             </div>
@@ -522,7 +542,6 @@ export default function OrderGroupsPage() {
                                                         <small className="text-muted">
                                                             Doručení v: <strong>{group.deliveryAt ?? '—'}</strong>
                                                         </small>
-                                                        {isCreator && <small className="text-muted fst-italic">(upravit)</small>}
                                                     </div>
                                                 )}
                                             </div>
@@ -564,6 +583,7 @@ export default function OrderGroupsPage() {
                 <PayForGroupModal
                     isOpen={!!payModal}
                     onClose={() => setPayModal(null)}
+                    onSuccess={fetchData}
                     group={payModal}
                     groupId={payModal.id}
                     payerLogin={auth.login}

client/vite.config.ts

@@ -8,6 +8,7 @@ export default defineConfig({
     plugins: [react(), viteTsconfigPaths()],
     server: {
         open: true,
+        host: '0.0.0.0',
         port: 3000,
         proxy: {
             '/api': 'http://localhost:3001',

e2e/playwright.config.ts

@@ -4,7 +4,10 @@ import path from 'path';
 // Use 127.0.0.1 explicitly — on Node.js 18+/Windows, `localhost` may resolve to ::1
 // (IPv6) while the HTTP server only binds to 0.0.0.0 (IPv4), causing the webServer
 // readiness poll to time out even though the server is listening.
-const BASE_URL = process.env.E2E_BASE_URL ?? 'http://127.0.0.1:3001';
+// Port 3099 avoids conflicts with locally running Docker containers on 3001-3003.
+// Override with E2E_PORT env var if needed.
+const E2E_PORT = process.env.E2E_PORT ?? '3099';
+const BASE_URL = process.env.E2E_BASE_URL ?? `http://127.0.0.1:${E2E_PORT}`;
 
 // Server env vars injected for local runs. In CI these are set at the step level.
 const serverEnv: Record<string, string> = {
@@ -15,6 +18,7 @@ const serverEnv: Record<string, string> = {
     HTTP_REMOTE_USER_ENABLED: 'true',
     HTTP_REMOTE_USER_HEADER_NAME: 'remote-user',
     HTTP_REMOTE_TRUSTED_IPS: process.env.HTTP_REMOTE_TRUSTED_IPS ?? '127.0.0.1,::1,::ffff:127.0.0.1',
+    PORT: E2E_PORT,
 };
 if (process.env.REDIS_HOST) {
     serverEnv.REDIS_HOST = process.env.REDIS_HOST;
@@ -50,7 +54,7 @@ export default defineConfig({
         cwd: path.resolve(__dirname, '../server'),
         // Poll a dedicated health endpoint — polling '/' can stall in Express 5 when
         // server/public/ doesn't exist in the working directory (no finalhandler match).
-        url: `http://127.0.0.1:3001/api/health`,
+        url: `http://127.0.0.1:${E2E_PORT}/api/health`,
         timeout: 15_000,
         reuseExistingServer: !process.env.CI,
         env: serverEnv,

k8s/README.md

@@ -0,0 +1,186 @@
+# Kubernetes — Luncher HA
+
+Manifesty pro nasazení Luncheru na Kubernetes s vysokou dostupností (3 repliky, Redis adapter pro Socket.io, WATCH/MULTI atomické zápisy, graceful shutdown).
+
+## Prerekvizity
+
+- kubectl nakonfigurovaný na cílový cluster
+- `helm` nainstalovaný
+- Redis Stack image přístupný z clusteru (`redis/redis-stack-server:7.2.0-v14`)
+- Obraz `luncher:ha-test` načtený do clusteru (viz níže)
+
+## Lokální kind cluster (testik) — setup
+
+### 1. Smazat a znovu vytvořit cluster s port mappings
+
+```powershell
+$env:KIND_EXPERIMENTAL_PROVIDER = "nerdctl"
+# Přidat nerdctl do PATH (Rancher Desktop)
+$env:PATH += ";$env:LOCALAPPDATA\Programs\Rancher Desktop\resources\resources\win32\bin"
+
+kind delete cluster --name testik
+kind create cluster --name testik --config k8s/kind/testik.yaml
+```
+
+### 2. Sestavit a načíst obraz
+
+```powershell
+docker build -t luncher:ha-test .
+
+# Uložit a načíst přes nerdctl (kind + nerdctl provider)
+nerdctl save luncher:ha-test -o luncher.tar
+kind load image-archive luncher.tar --name testik
+Remove-Item luncher.tar
+```
+
+### 3. Nainstalovat Traefik (rke2-traefik)
+
+> **Prerekvizita (Rancher Desktop):** Pokud Rancher Desktop běží s `kubernetes.options.traefik=true`,
+> host-switch.exe obsadí port 80 dříve než kind. Vypni traefik v k3s:
+> ```powershell
+> rdctl set --kubernetes.options.traefik=false
+> ```
+>
+> **Prerekvizita — inotify limity:** Čtyř-uzlový kind cluster vyčerpá výchozí
+> `fs.inotify.max_user_instances=128`. kube-proxy pak padá s „too many open files".
+> Zvyš limit v rancher-desktop WSL2 (přežije restart WSL2, ale ne reboot — přidej do
+> `/etc/sysctl.d/99-kind.conf` pro trvalost):
+> ```powershell
+> wsl -d rancher-desktop -- sysctl -w fs.inotify.max_user_instances=1280
+> ```
+
+```powershell
+# rke2-traefik je v rke2-charts, ne rancher-charts
+helm repo add rke2-charts https://rke2-charts.rancher.io
+helm repo update
+
+# Nejdřív CRD chart, pak samotný chart
+helm install traefik-crd rke2-charts/rke2-traefik-crd -n kube-system --create-namespace
+helm install traefik rke2-charts/rke2-traefik -n kube-system `
+  --set "tolerations[0].key=node-role.kubernetes.io/control-plane" `
+  --set "tolerations[0].operator=Exists" `
+  --set "tolerations[0].effect=NoSchedule"
+```
+
+Ověř že Traefik DaemonSet běží na control-plane (má hostPort 80):
+```powershell
+kubectl get ds -n kube-system traefik-rke2-traefik
+kubectl get pods -n kube-system -o wide | Select-String traefik
+```
+
+### 4. Nainstalovat Reloader
+
+[stakater/Reloader](https://github.com/stakater/Reloader) sleduje změny Secret a ConfigMap a automaticky spustí rolling restart Deploymentu — odpadá nutnost ručního `kubectl rollout restart` po rotaci `JWT_SECRET` nebo `ADMIN_PASSWORD`.
+
+Manifest je vendorovaný ve verzi v1.4.16 (`k8s/base/reloader.yaml`). Nasadit do `default` namespace:
+
+```powershell
+kubectl apply -f k8s/base/reloader.yaml
+kubectl rollout status deploy/reloader-reloader
+```
+
+Reloader běží cluster-wide díky `ClusterRoleBinding` — nepotřebuje žádnou konfiguraci per-namespace. Deployment Luncheru má anotaci `reloader.stakater.com/auto: "true"`, která říká Reloaderu, ať sleduje všechny Secrety a ConfigMapy odkazované přes `envFrom`.
+
+### 5. Nasadit Luncher
+
+```powershell
+# Namespace + Redis
+kubectl apply -f k8s/base/namespace.yaml
+kubectl apply -f k8s/base/redis-statefulset.yaml
+kubectl apply -f k8s/base/redis-service.yaml
+
+# Počkat na Redis
+kubectl rollout status statefulset/redis -n luncher
+
+# Server secret (nebo použít šablonu server-secret.yaml)
+kubectl create secret generic luncher-secrets -n luncher `
+  --from-literal=JWT_SECRET=dev-secret-change-me `
+  --from-literal=ADMIN_PASSWORD=admin
+
+# Server
+kubectl apply -f k8s/base/server-configmap.yaml
+kubectl apply -f k8s/base/server-deployment.yaml
+kubectl apply -f k8s/base/server-service.yaml
+kubectl apply -f k8s/base/server-pdb.yaml
+kubectl apply -f k8s/base/ingressroute.yaml
+
+# Počkat na server
+kubectl rollout status deploy/luncher -n luncher
+```
+
+## Testovací scénáře
+
+### Baseline
+
+```powershell
+kubectl get pods -n luncher -o wide
+# Ověř: 3 pody na 3 různých worker uzlech, status Running
+```
+
+### Rolling update bez výpadku
+
+V jednom terminálu posílej provoz:
+```powershell
+# Nainstaluj hey: go install github.com/rakyll/hey@latest
+hey -z 60s -c 20 http://luncher.localhost/api/health
+```
+
+Ve druhém terminálu spusť rollout:
+```powershell
+kubectl rollout restart deploy/luncher -n luncher
+```
+
+**Kritérium: 0 non-2xx odpovědí, 0 connection errors.**
+
+### Node drain
+
+```powershell
+kubectl cordon testik-worker2
+kubectl drain testik-worker2 --ignore-daemonsets --delete-emptydir-data
+# PDB zabrání souběžnému drainu druhého nodu
+kubectl get pods -n luncher -o wide  # pody se přeplánují
+kubectl uncordon testik-worker2
+```
+
+### Ověření Socket.io cross-pod
+
+1. Otevři dvě záložky prohlížeče na `http://luncher.localhost`
+2. Z jednoho podu vyvolej změnu:
+   ```powershell
+   kubectl exec -it deploy/luncher -n luncher -- curl -s -X POST localhost:3001/api/...
+   ```
+3. Ověř, že druhá záložka (pravděpodobně jiný pod) obdrží WebSocket event
+
+### Concurrent write test
+
+1. Otevři stejnou Pizza day objednávku ve dvou záložkách
+2. Simuluj souběžné odeslání (otevřít DevTools → síť → odeslat obě požadavky současně)
+3. Ověř Redis: `kubectl exec -it redis-0 -n luncher -- redis-cli JSON.GET luncher:<datum>`
+   — oba zápisy musí být zachovány (WATCH/MULTI retry)
+
+### Auto-rollout při změně Secret / ConfigMap
+
+Reloader automaticky spustí rolling restart, kdykoli se změní `luncher-secrets` nebo `luncher-config`:
+
+```powershell
+# Příklad: rotace admin hesla
+kubectl -n luncher patch secret luncher-secrets --type=merge `
+  -p '{"stringData":{"ADMIN_PASSWORD":"nove-heslo"}}'
+
+# Reloader detekuje změnu resourceVersion a patchne pod template
+kubectl rollout status deploy/luncher -n luncher
+
+# Ověř anotaci přidanou Reloaderem na pod template
+kubectl get deploy luncher -n luncher -o yaml | Select-String "STAKATER"
+```
+
+**Kritérium: pody se automaticky vyrolují bez ručního restartu. PDB zajistí, že alespoň jeden pod zůstane dostupný.**
+
+## Pořadí aplikace manifestů
+
+1. `reloader.yaml` (do `default` namespace — musí být před Deployment)
+2. `namespace.yaml`
+3. `redis-statefulset.yaml` + `redis-service.yaml`
+4. `server-configmap.yaml` + `server-secret.yaml`
+5. `server-deployment.yaml` + `server-service.yaml` + `server-pdb.yaml`
+6. `ingressroute.yaml`

k8s/base/ingressroute.yaml

@@ -0,0 +1,16 @@
+apiVersion: traefik.io/v1alpha1
+kind: IngressRoute
+metadata:
+  name: luncher
+  namespace: luncher
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  entryPoints:
+    - web
+  routes:
+    - match: Host(`luncher.localhost`)
+      kind: Rule
+      services:
+        - name: luncher
+          port: 3001

k8s/base/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: luncher

k8s/base/redis-service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis
+  namespace: luncher
+spec:
+  clusterIP: None  # headless — StatefulSet pod discovery
+  selector:
+    app: redis
+  ports:
+    - port: 6379
+      targetPort: 6379

k8s/base/redis-statefulset.yaml

@@ -0,0 +1,50 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: redis
+  namespace: luncher
+spec:
+  serviceName: redis
+  replicas: 1
+  selector:
+    matchLabels:
+      app: redis
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+        - name: redis
+          # Redis Stack je nutný — aplikace používá JSON.GET / JSON.SET (modul RedisJSON)
+          image: redis/redis-stack-server:7.2.0-v14
+          ports:
+            - containerPort: 6379
+          resources:
+            requests:
+              cpu: 100m
+              memory: 128Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+          volumeMounts:
+            - name: data
+              mountPath: /data
+          readinessProbe:
+            exec:
+              command: ["redis-cli", "ping"]
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          livenessProbe:
+            exec:
+              command: ["redis-cli", "ping"]
+            initialDelaySeconds: 10
+            periodSeconds: 10
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        resources:
+          requests:
+            storage: 1Gi

k8s/base/reloader.yaml

@@ -0,0 +1,184 @@
+# stakater/Reloader v1.4.16
+# Zdroj: https://raw.githubusercontent.com/stakater/Reloader/v1.4.16/deployments/kubernetes/reloader.yaml
+# Aktualizace: stáhnout novou verzi ze stejné URL a nahradit tento soubor.
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: reloader-reloader
+  namespace: default
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: reloader-reloader-metadata-role
+  namespace: default
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - configmaps
+  verbs:
+  - list
+  - get
+  - watch
+  - create
+  - update
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: reloader-reloader-role
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - secrets
+  - configmaps
+  verbs:
+  - list
+  - get
+  - watch
+- apiGroups:
+  - apps
+  resources:
+  - deployments
+  - daemonsets
+  - statefulsets
+  verbs:
+  - list
+  - get
+  - update
+  - patch
+- apiGroups:
+  - extensions
+  resources:
+  - deployments
+  - daemonsets
+  verbs:
+  - list
+  - get
+  - update
+  - patch
+- apiGroups:
+  - batch
+  resources:
+  - cronjobs
+  verbs:
+  - list
+  - get
+- apiGroups:
+  - batch
+  resources:
+  - jobs
+  verbs:
+  - create
+  - delete
+  - list
+  - get
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: reloader-reloader-metadata-rolebinding
+  namespace: default
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: reloader-reloader-metadata-role
+subjects:
+- kind: ServiceAccount
+  name: reloader-reloader
+  namespace: default
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: reloader-reloader-role-binding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: reloader-reloader-role
+subjects:
+- kind: ServiceAccount
+  name: reloader-reloader
+  namespace: default
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: reloader-reloader
+  namespace: default
+spec:
+  replicas: 1
+  revisionHistoryLimit: 2
+  selector:
+    matchLabels:
+      app: reloader-reloader
+  template:
+    metadata:
+      labels:
+        app: reloader-reloader
+    spec:
+      containers:
+      - env:
+        - name: GOMAXPROCS
+          valueFrom:
+            resourceFieldRef:
+              divisor: "1"
+              resource: limits.cpu
+        - name: GOMEMLIMIT
+          valueFrom:
+            resourceFieldRef:
+              divisor: "1"
+              resource: limits.memory
+        - name: RELOADER_NAMESPACE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: RELOADER_DEPLOYMENT_NAME
+          value: reloader-reloader
+        image: ghcr.io/stakater/reloader:v1.4.16
+        imagePullPolicy: IfNotPresent
+        livenessProbe:
+          failureThreshold: 5
+          httpGet:
+            path: /live
+            port: http
+          initialDelaySeconds: 10
+          periodSeconds: 10
+          successThreshold: 1
+          timeoutSeconds: 5
+        name: reloader-reloader
+        ports:
+        - containerPort: 9090
+          name: http
+        readinessProbe:
+          failureThreshold: 5
+          httpGet:
+            path: /metrics
+            port: http
+          initialDelaySeconds: 10
+          periodSeconds: 10
+          successThreshold: 1
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: "1"
+            memory: 512Mi
+          requests:
+            cpu: 10m
+            memory: 512Mi
+        securityContext: {}
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 65534
+        seccompProfile:
+          type: RuntimeDefault
+      serviceAccountName: reloader-reloader

k8s/base/server-configmap.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: luncher-config
+  namespace: luncher
+data:
+  NODE_ENV: production
+  STORAGE: redis
+  REDIS_HOST: redis
+  REDIS_PORT: "6379"
+  PORT: "3001"
+  HOST: "0.0.0.0"

k8s/base/server-deployment.yaml

@@ -0,0 +1,85 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: luncher
+  namespace: luncher
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: luncher
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 0        # nelze přidat extra pod — každý worker je obsazen
+      maxUnavailable: 1  # nejdřív smaž starý pod, pak naplánuj nový
+  template:
+    metadata:
+      labels:
+        app: luncher
+      annotations:
+        reloader.stakater.com/auto: "true"
+    spec:
+      terminationGracePeriodSeconds: 30
+
+      # Rozmístit každý pod na jiný worker uzel
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchLabels:
+                  app: luncher
+              topologyKey: kubernetes.io/hostname
+
+      containers:
+        - name: luncher
+          image: luncher:ha-test
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 3001
+
+          envFrom:
+            - configMapRef:
+                name: luncher-config
+            - secretRef:
+                name: luncher-secrets
+
+          env:
+            # POD_ID pro leader election scheduleru připomínek
+            - name: POD_ID
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+
+          resources:
+            requests:
+              cpu: 100m
+              memory: 256Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+
+          # Liveness — levná kontrola bez externích závislostí
+          livenessProbe:
+            httpGet:
+              path: /api/health
+              port: 3001
+            initialDelaySeconds: 10
+            periodSeconds: 10
+            failureThreshold: 3
+
+          # Readiness — kontroluje Redis; při shutdown vrací 503
+          readinessProbe:
+            httpGet:
+              path: /api/health/ready
+              port: 3001
+            initialDelaySeconds: 10
+            periodSeconds: 5
+            failureThreshold: 2
+
+          # preStop sleep: dá čas kube-proxy a Traefiku odebrat endpoint
+          # dřív než kontejner začne odmítat nová spojení
+          lifecycle:
+            preStop:
+              exec:
+                command: ["sleep", "5"]

k8s/base/server-pdb.yaml

@@ -0,0 +1,10 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: luncher-pdb
+  namespace: luncher
+spec:
+  minAvailable: 2   # ze 3 replik, max 1 voluntary disruption najednou
+  selector:
+    matchLabels:
+      app: luncher

k8s/base/server-secret.yaml

@@ -0,0 +1,14 @@
+# Šablona — hodnoty jsou zástupné symboly.
+# Pro kind test vytvoř secret příkazem:
+#   kubectl create secret generic luncher-secrets -n luncher \
+#     --from-literal=JWT_SECRET=<your-secret> \
+#     --from-literal=ADMIN_PASSWORD=<your-password>
+apiVersion: v1
+kind: Secret
+metadata:
+  name: luncher-secrets
+  namespace: luncher
+type: Opaque
+stringData:
+  JWT_SECRET: CHANGE_ME
+  ADMIN_PASSWORD: CHANGE_ME

k8s/base/server-service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: luncher
+  namespace: luncher
+spec:
+  selector:
+    app: luncher
+  ports:
+    - port: 3001
+      targetPort: 3001

k8s/kind/testik.yaml

@@ -0,0 +1,16 @@
+kind: Cluster
+apiVersion: kind.x-k8s.io/v1alpha4
+nodes:
+  - role: control-plane
+    # Mapuje porty na Windows localhost — luncher.localhost resolves to 127.0.0.1
+    # Traefik na control-plane podu poslouchá na těchto portech přes hostPort
+    extraPortMappings:
+      - containerPort: 80
+        hostPort: 80
+        protocol: TCP
+      - containerPort: 443
+        hostPort: 443
+        protocol: TCP
+  - role: worker
+  - role: worker
+  - role: worker

server/package.json

@@ -29,6 +29,7 @@
     "typescript": "^5.9.3"
   },
   "dependencies": {
+    "@socket.io/redis-adapter": "^8.3.0",
     "axios": "^1.13.2",
     "cheerio": "^1.1.2",
     "cors": "^2.8.5",

server/src/auth.ts

@@ -9,13 +9,13 @@ import jwt from 'jsonwebtoken';
  */
 export function generateToken(login?: string, trusted?: boolean): string {
     if (!process.env.JWT_SECRET) {
-        throw Error("Není vyplněna proměnná prostředí JWT_SECRET");
+        throw new Error("Není vyplněna proměnná prostředí JWT_SECRET");
     }
     if (process.env.JWT_SECRET.length < 32) {
-        throw Error("Proměnná prostředí JWT_SECRET musí být minimálně 32 znaků");
+        throw new Error("Proměnná prostředí JWT_SECRET musí být minimálně 32 znaků");
     }
     if (!login || login.trim().length === 0) {
-        throw Error("Nebyl předán login");
+        throw new Error("Nebyl předán login");
     }
     const payload = { login, trusted: trusted || false, logoutUrl: process.env.LOGOUT_URL };
     return jwt.sign(payload, process.env.JWT_SECRET);
@@ -28,7 +28,7 @@ export function generateToken(login?: string, trusted?: boolean): string {
  */
 export function verify(token: string): boolean {
     if (!process.env.JWT_SECRET) {
-        throw Error("Není vyplněna proměnná prostředí JWT_SECRET");
+        throw new Error("Není vyplněna proměnná prostředí JWT_SECRET");
     }
     try {
         jwt.verify(token, process.env.JWT_SECRET);
@@ -45,10 +45,10 @@ export function verify(token: string): boolean {
  */
 export function getLogin(token?: string): string {
     if (!process.env.JWT_SECRET) {
-        throw Error("Není vyplněna proměnná prostředí JWT_SECRET");
+        throw new Error("Není vyplněna proměnná prostředí JWT_SECRET");
     }
     if (!token) {
-        throw Error("Nebyl předán token");
+        throw new Error("Nebyl předán token");
     }
     const payload: any = jwt.verify(token, process.env.JWT_SECRET);
     return payload.login;
@@ -61,10 +61,10 @@ export function getLogin(token?: string): string {
  */
 export function getTrusted(token?: string): boolean {
     if (!process.env.JWT_SECRET) {
-        throw Error("Není vyplněna proměnná prostředí JWT_SECRET");
+        throw new Error("Není vyplněna proměnná prostředí JWT_SECRET");
     }
     if (!token) {
-        throw Error("Nebyl předán token");
+        throw new Error("Nebyl předán token");
     }
     const payload: any = jwt.verify(token, process.env.JWT_SECRET);
     return payload.trusted || false;

server/src/chefie.ts

@@ -28,16 +28,16 @@ const buildPizzaUrl = (pizzaUrl: string) => {
     return `${baseUrl}/${pizzaUrl}`;
 }
 
-// Ceny krabic dle velikosti
+// Ceny krabic dle velikosti v haléřích
 const boxPrices: { [key: string]: number } = {
-    "30cm": 13,
-    "35cm": 15,
-    "40cm": 18,
-    "50cm": 25
+    "30cm": 1300,
+    "35cm": 1500,
+    "40cm": 1800,
+    "50cm": 2500
 }
 
-// Cena obalu pro salát
-const SALAT_BOX_PRICE = 13;
+// Cena obalu pro salát v haléřích
+const SALAT_BOX_PRICE = 1300;
 
 /**
  * Stáhne a scrapne aktuální pizzy ze stránek Pizza Chefie.
@@ -79,7 +79,7 @@ export async function downloadPizzy(mock: boolean): Promise<Pizza[]> {
         a.each((i, elm) => {
             const varId = Number.parseInt(elm.attribs.href.split('?varianta=')[1].trim());
             const size = $($(elm).contents().get(0)).text().trim();
-            const price = Number.parseInt($($(elm).contents().get(1)).text().trim().split(" Kč")[0]);
+            const price = Number.parseInt($($(elm).contents().get(1)).text().trim().split(" Kč")[0]) * 100;
             sizes.push({ varId, size, pizzaPrice: price, boxPrice: boxPrices[size], price: price + boxPrices[size] });
         })
         result.push({
@@ -119,7 +119,7 @@ export async function downloadSalaty(mock: boolean): Promise<Salat[]> {
             ingredients.push($(elm).text());
         });
         const priceText = $('.cena > span', salatHtml).first().text().trim();
-        const price = Number.parseInt(priceText.split(' Kč')[0]);
+        const price = Number.parseInt(priceText.split(' Kč')[0]) * 100;
         result.push({ name, ingredients, price: price + SALAT_BOX_PRICE });
     }
     return result;

server/src/groups.ts

@@ -131,6 +131,7 @@ export async function setGroupState(login: string, groupId: string, newState: Gr
         await removePendingQrsByGroupId(memberLogins, groupId);
         group.orderedAt = undefined;
         group.deliveryAt = undefined;
+        group.qrGenerated = undefined;
         for (const ml of memberLogins) {
             group.members[ml] = { ...group.members[ml], paid: undefined };
         }
@@ -139,6 +140,16 @@ export async function setGroupState(login: string, groupId: string, newState: Gr
     return saveExtraData(data, date);
 }
 
+export async function markGroupQrGenerated(login: string, groupId: string, date?: Date): Promise<void> {
+    const data = await getExtraData(date);
+    const group = findGroup(data, groupId);
+    if (!group) throw new Error('Skupina nebyla nalezena');
+    if (group.creatorLogin !== login) throw new Error('QR kódy může generovat pouze zakladatel');
+    if (group.state !== GroupState.ORDERED) throw new Error('QR kódy lze generovat pouze ve stavu "objednáno"');
+    group.qrGenerated = true;
+    await saveExtraData(data, date);
+}
+
 export async function markGroupMemberPaid(login: string, groupId: string, date?: Date): Promise<ClientData | null> {
     const data = await getExtraData(date);
     const group = findGroup(data, groupId);

server/src/index.ts

@@ -9,9 +9,11 @@ import { getQr } from "./qr";
 import { generateToken, getLogin, verify } from "./auth";
 import { getIsWeekend, InsufficientPermissions, PizzaDayConflictError, parseToken } from "./utils";
 import { getPendingQrs } from "./pizza";
-import { initWebsocket, getWebsocket } from "./websocket";
-import { startReminderScheduler, verifyQuickChoiceToken } from "./pushReminder";
+import { initWebsocket, initRedisAdapter, shutdownWebsocketClients, getWebsocket } from "./websocket";
+import { startReminderScheduler, stopReminderScheduler, releaseReminderLease, verifyQuickChoiceToken } from "./pushReminder";
 import { storageReady } from "./storage";
+import getStorage from "./storage";
+import { shutdownRedisStorage } from "./storage/redis";
 import pizzaDayRoutes from "./routes/pizzaDayRoutes";
 import foodRoutes, { refreshMetoda } from "./routes/foodRoutes";
 import votingRoutes from "./routes/votingRoutes";
@@ -27,23 +29,24 @@ import storeRoutes from "./routes/storeRoutes";
 const ENVIRONMENT = process.env.NODE_ENV ?? 'production';
 dotenv.config({ path: path.resolve(__dirname, `../.env.${ENVIRONMENT}`) });
 
-// Validace nastavení JWT tokenu - nemá bez něj smysl vůbec povolit server spustit
 if (!process.env.JWT_SECRET) {
-    throw Error("Není vyplněna proměnná prostředí JWT_SECRET");
+    throw new Error("Není vyplněna proměnná prostředí JWT_SECRET");
 }
 
 const app = express();
 const server = require("http").createServer(app);
+
+// Tune keep-alive timeouts to outlive Traefik's 60s idle timeout.
+// headersTimeout must be strictly greater than keepAliveTimeout.
+server.keepAliveTimeout = 65_000;
+server.headersTimeout   = 66_000;
+server.requestTimeout   = 30_000;
+
 initWebsocket(server);
 
-// Body-parser middleware for parsing JSON
 app.use(bodyParser.json());
+app.use(cors({ origin: '*' }));
 
-app.use(cors({
-    origin: '*'
-}));
-
-// Zapínatelný login přes hlavičky - pokud je zapnutý nepovolí "basicauth"
 const HTTP_REMOTE_USER_ENABLED = process.env.HTTP_REMOTE_USER_ENABLED === 'true' || false;
 const HTTP_REMOTE_USER_HEADER_NAME = process.env.HTTP_REMOTE_USER_HEADER_NAME ?? 'remote-user';
 if (HTTP_REMOTE_USER_ENABLED) {
@@ -51,19 +54,69 @@ if (HTTP_REMOTE_USER_ENABLED) {
         throw new Error('Je zapnutý login z hlaviček, ale není nastaven rozsah adres ze kterých hlavička může přijít.');
     }
     const HTTP_REMOTE_TRUSTED_IPS = process.env.HTTP_REMOTE_TRUSTED_IPS.split(',').map(ip => ip.trim());
-    //TODO: nevim jak udelat console.log pouze pro "debug"
-    //console.log("Budu věřit hlavičkám z: " + HTTP_REMOTE_TRUSTED_IPS);
     app.set('trust proxy', HTTP_REMOTE_TRUSTED_IPS);
     console.log('Zapnutý login přes hlavičky z proxy.');
 }
 
+// ─── Shutdown state ──────────────────────────────────────────────────────────
 
-// ----------- Metody nevyžadující token --------------
+let shuttingDown = false;
 
+async function shutdown(signal: string) {
+    if (shuttingDown) return;
+    shuttingDown = true;
+    console.log(`${signal} received — initiating graceful shutdown`);
+
+    // Hard-exit failsafe: fires before terminationGracePeriodSeconds (30s)
+    setTimeout(() => {
+        console.error('Graceful shutdown timed out, forcing exit');
+        process.exit(1);
+    }, 25_000).unref();
+
+    // Disconnect WebSocket clients so they reconnect to another pod
+    const io = getWebsocket();
+    io?.disconnectSockets(true);
+
+    // Stop accepting new HTTP connections and drain in-flight requests
+    (server as any).closeIdleConnections?.();
+    await new Promise<void>(resolve => server.close(() => resolve()));
+
+    // Stop reminder scheduler and release leader lease
+    stopReminderScheduler();
+    await releaseReminderLease();
+
+    // Shut down Redis pub/sub clients (Socket.io adapter)
+    await shutdownWebsocketClients();
+
+    // Shut down main Redis storage client
+    if (process.env.STORAGE?.toLowerCase() === 'redis') {
+        await shutdownRedisStorage();
+    }
+
+    console.log('Graceful shutdown complete');
+    process.exit(0);
+}
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT',  () => shutdown('SIGINT'));
+
+// ─── Routes — no auth required ───────────────────────────────────────────────
+
+/** Liveness probe — cheap, no external deps. */
 app.get("/api/health", (_req, res) => {
     res.status(200).json({ ok: true });
 });
 
+/** Readiness probe — verifies Redis connectivity and rejects traffic during shutdown. */
+app.get("/api/health/ready", async (_req, res) => {
+    if (shuttingDown) {
+        return res.status(503).json({ ok: false, reason: 'shutting down' });
+    }
+    const healthy = await getStorage().healthCheck?.() ?? true;
+    if (!healthy) return res.status(503).json({ ok: false, reason: 'storage unavailable' });
+    res.status(200).json({ ok: true });
+});
+
 app.get("/api/whoami", (req, res) => {
     if (!HTTP_REMOTE_USER_ENABLED) {
         res.status(403).json({ error: 'Není zapnuté přihlášení z hlaviček' });
@@ -76,21 +129,17 @@ app.get("/api/whoami", (req, res) => {
 })
 
 app.post("/api/login", (req, res) => {
-    if (HTTP_REMOTE_USER_ENABLED) { // je rovno app.enabled('trust proxy')
-        // Autentizace pomocí trusted headers
+    if (HTTP_REMOTE_USER_ENABLED) {
         const remoteUser = req.header(HTTP_REMOTE_USER_HEADER_NAME);
-        //const remoteName = req.header('remote-name');
         if (remoteUser && remoteUser.length > 0) {
             res.status(200).json(generateToken(Buffer.from(remoteUser, 'latin1').toString(), true));
         } else {
-            throw Error("Je zapnuto přihlášení přes hlavičky, ale nepřišla hlavička nebo ??");
+            throw new Error("Je zapnuto přihlášení přes hlavičky, ale nepřišla hlavička nebo ??");
         }
     } else {
-        // Klasická autentizace loginem
         if (!req.body?.login || req.body.login.trim().length === 0) {
-            throw Error("Nebyl předán login");
+            throw new Error("Nebyl předán login");
         }
-        // TODO zavést podmínky pro délku loginu (min i max)
         res.status(200).json(generateToken(req.body.login, false));
     }
 });
@@ -111,12 +160,10 @@ app.get("/api/qr", async (req, res) => {
     res.end(img);
 });
 
-// ----------------------------------------------------
+// ─── Semi-public routes ───────────────────────────────────────────────────────
 
-// Přeskočení auth pro refresh dat xd
 app.use("/api/food/refresh", refreshMetoda);
 
-// Rychlá akce z push notifikace — autentizace pomocí HMAC tokenu z push payloadu (SW nemá přístup k JWT)
 app.post("/api/notifications/push/quickChoice", async (req, res, next) => {
     try {
         const { login, token } = req.body ?? {};
@@ -132,10 +179,10 @@ app.post("/api/notifications/push/quickChoice", async (req, res, next) => {
     } catch (e: any) { next(e); }
 });
 
-/** Middleware ověřující JWT token */
+// ─── Auth middleware ──────────────────────────────────────────────────────────
+
 app.use("/api/", (req, res, next) => {
     if (HTTP_REMOTE_USER_ENABLED) {
-        // Autentizace pomocí trusted headers
         const remoteUser = req.header(HTTP_REMOTE_USER_HEADER_NAME);
         if (process.env.ENABLE_HEADERS_LOGGING === 'yes') {
             delete req.headers["cookie"]
@@ -158,7 +205,8 @@ app.use("/api/", (req, res, next) => {
     next();
 });
 
-/** Vrátí data pro aktuální den. */
+// ─── Authenticated routes ─────────────────────────────────────────────────────
+
 app.get("/api/data", async (req, res) => {
     let date = undefined;
     if (req.query.dayIndex != null && typeof req.query.dayIndex === 'string') {
@@ -167,7 +215,6 @@ app.get("/api/data", async (req, res) => {
             date = getDateForWeekIndex(parseInt(req.query.dayIndex));
         }
     } else if (getIsWeekend(getToday())) {
-        // Na víkendu zobrazíme pátek místo hlášky "Užívejte víkend"
         date = getDateForWeekIndex(4);
     }
     const slotParam = typeof req.query.slot === 'string' ? req.query.slot as MealSlot : undefined;
@@ -175,7 +222,6 @@ app.get("/api/data", async (req, res) => {
         return res.status(400).json({ error: 'Neplatný slot' });
     }
     const data = await getData(date, slotParam);
-    // Připojíme nevyřízené QR kódy pro přihlášeného uživatele
     try {
         const login = getLogin(parseToken(req));
         const pendingQrs = await getPendingQrs(login);
@@ -188,7 +234,6 @@ app.get("/api/data", async (req, res) => {
     res.status(200).json(data);
 });
 
-// Ostatní routes
 app.use("/api/pizzaDay", pizzaDayRoutes);
 app.use("/api/food", foodRoutes);
 app.use("/api/voting", votingRoutes);
@@ -201,10 +246,12 @@ app.use("/api/changelogs", changelogRoutes);
 app.use("/api/groups", groupRoutes);
 app.use("/api/stores", storeRoutes);
 
-app.use('/stats', express.static('public'));
-app.use(express.static('public'));
+app.use(express.static(path.join(process.cwd(), 'public')));
+app.get('*splat', (_req, res) => {
+    res.sendFile(path.join(process.cwd(), 'public', 'index.html'));
+});
 
-// Middleware pro zpracování chyb
+// Error handling middleware
 app.use((err: any, req: any, res: any, next: any) => {
     if (err instanceof InsufficientPermissions) {
         res.status(403).send({ error: err.message })
@@ -216,18 +263,18 @@ app.use((err: any, req: any, res: any, next: any) => {
     next();
 });
 
+// ─── Bootstrap ────────────────────────────────────────────────────────────────
+
 const PORT = process.env.PORT ?? 3001;
 const HOST = process.env.HOST ?? '0.0.0.0';
 
-storageReady.then(() => {
+storageReady.then(async () => {
+    // Init Redis adapter after storage is connected (only in Redis mode)
+    if (process.env.STORAGE?.toLowerCase() === 'redis') {
+        await initRedisAdapter();
+    }
     server.listen(PORT, () => {
         console.log(`Server listening on ${HOST}, port ${PORT}`);
         startReminderScheduler();
     });
 });
-
-// Umožníme vypnutí serveru přes SIGINT, jinak Docker čeká než ho sestřelí
-process.on('SIGINT', function () {
-    console.log("\nSIGINT (Ctrl-C), vypínám server");
-    process.exit(0);
-});

server/src/mock.ts

@@ -661,30 +661,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 1,
                 size: "30cm",
-                pizzaPrice: 138,
-                boxPrice: 13,
-                price: 151
+                pizzaPrice: 13800,
+                boxPrice: 1300,
+                price: 15100
             },
             {
                 varId: 2,
                 size: "35cm",
-                pizzaPrice: 166,
-                boxPrice: 15,
-                price: 181
+                pizzaPrice: 16600,
+                boxPrice: 1500,
+                price: 18100
             },
             {
                 varId: 3,
                 size: "40cm",
-                pizzaPrice: 223,
-                boxPrice: 18,
-                price: 241
+                pizzaPrice: 22300,
+                boxPrice: 1800,
+                price: 24100
             },
             {
                 varId: 4,
                 size: "50cm",
-                pizzaPrice: 306,
-                boxPrice: 25,
-                price: 331
+                pizzaPrice: 30600,
+                boxPrice: 2500,
+                price: 33100
             }
         ]
     },
@@ -700,30 +700,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 6,
                 size: "30cm",
-                pizzaPrice: 142,
-                boxPrice: 13,
-                price: 155
+                pizzaPrice: 14200,
+                boxPrice: 1300,
+                price: 15500
             },
             {
                 varId: 7,
                 size: "35cm",
-                pizzaPrice: 172,
-                boxPrice: 15,
-                price: 187
+                pizzaPrice: 17200,
+                boxPrice: 1500,
+                price: 18700
             },
             {
                 varId: 8,
                 size: "40cm",
-                pizzaPrice: 233,
-                boxPrice: 18,
-                price: 251
+                pizzaPrice: 23300,
+                boxPrice: 1800,
+                price: 25100
             },
             {
                 varId: 9,
                 size: "50cm",
-                pizzaPrice: 316,
-                boxPrice: 25,
-                price: 341
+                pizzaPrice: 31600,
+                boxPrice: 2500,
+                price: 34100
             }
         ]
     },
@@ -741,30 +741,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 10,
                 size: "30cm",
-                pizzaPrice: 142,
-                boxPrice: 13,
-                price: 155
+                pizzaPrice: 14200,
+                boxPrice: 1300,
+                price: 15500
             },
             {
                 varId: 11,
                 size: "35cm",
-                pizzaPrice: 172,
-                boxPrice: 15,
-                price: 187
+                pizzaPrice: 17200,
+                boxPrice: 1500,
+                price: 18700
             },
             {
                 varId: 12,
                 size: "40cm",
-                pizzaPrice: 233,
-                boxPrice: 18,
-                price: 251
+                pizzaPrice: 23300,
+                boxPrice: 1800,
+                price: 25100
             },
             {
                 varId: 13,
                 size: "50cm",
-                pizzaPrice: 316,
-                boxPrice: 25,
-                price: 341
+                pizzaPrice: 31600,
+                boxPrice: 2500,
+                price: 34100
             }
         ]
     },
@@ -780,30 +780,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 14,
                 size: "30cm",
-                pizzaPrice: 142,
-                boxPrice: 13,
-                price: 155
+                pizzaPrice: 14200,
+                boxPrice: 1300,
+                price: 15500
             },
             {
                 varId: 15,
                 size: "35cm",
-                pizzaPrice: 172,
-                boxPrice: 15,
-                price: 187
+                pizzaPrice: 17200,
+                boxPrice: 1500,
+                price: 18700
             },
             {
                 varId: 16,
                 size: "40cm",
-                pizzaPrice: 233,
-                boxPrice: 18,
-                price: 251
+                pizzaPrice: 23300,
+                boxPrice: 1800,
+                price: 25100
             },
             {
                 varId: 17,
                 size: "50cm",
-                pizzaPrice: 294,
-                boxPrice: 25,
-                price: 319
+                pizzaPrice: 29400,
+                boxPrice: 2500,
+                price: 31900
             }
         ]
     },
@@ -821,30 +821,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 22,
                 size: "30cm",
-                pizzaPrice: 162,
-                boxPrice: 13,
-                price: 175
+                pizzaPrice: 16200,
+                boxPrice: 1300,
+                price: 17500
             },
             {
                 varId: 23,
                 size: "35cm",
-                pizzaPrice: 186,
-                boxPrice: 15,
-                price: 201
+                pizzaPrice: 18600,
+                boxPrice: 1500,
+                price: 20100
             },
             {
                 varId: 24,
                 size: "40cm",
-                pizzaPrice: 263,
-                boxPrice: 18,
-                price: 281
+                pizzaPrice: 26300,
+                boxPrice: 1800,
+                price: 28100
             },
             {
                 varId: 25,
                 size: "50cm",
-                pizzaPrice: 346,
-                boxPrice: 25,
-                price: 371
+                pizzaPrice: 34600,
+                boxPrice: 2500,
+                price: 37100
             }
         ]
     },
@@ -861,30 +861,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 26,
                 size: "30cm",
-                pizzaPrice: 162,
-                boxPrice: 13,
-                price: 175
+                pizzaPrice: 16200,
+                boxPrice: 1300,
+                price: 17500
             },
             {
                 varId: 27,
                 size: "35cm",
-                pizzaPrice: 186,
-                boxPrice: 15,
-                price: 201
+                pizzaPrice: 18600,
+                boxPrice: 1500,
+                price: 20100
             },
             {
                 varId: 28,
                 size: "40cm",
-                pizzaPrice: 263,
-                boxPrice: 18,
-                price: 281
+                pizzaPrice: 26300,
+                boxPrice: 1800,
+                price: 28100
             },
             {
                 varId: 29,
                 size: "50cm",
-                pizzaPrice: 346,
-                boxPrice: 25,
-                price: 371
+                pizzaPrice: 34600,
+                boxPrice: 2500,
+                price: 37100
             }
         ]
     },
@@ -902,30 +902,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 30,
                 size: "30cm",
-                pizzaPrice: 162,
-                boxPrice: 13,
-                price: 175
+                pizzaPrice: 16200,
+                boxPrice: 1300,
+                price: 17500
             },
             {
                 varId: 31,
                 size: "35cm",
-                pizzaPrice: 186,
-                boxPrice: 15,
-                price: 201
+                pizzaPrice: 18600,
+                boxPrice: 1500,
+                price: 20100
             },
             {
                 varId: 32,
                 size: "40cm",
-                pizzaPrice: 263,
-                boxPrice: 18,
-                price: 281
+                pizzaPrice: 26300,
+                boxPrice: 1800,
+                price: 28100
             },
             {
                 varId: 33,
                 size: "50cm",
-                pizzaPrice: 346,
-                boxPrice: 25,
-                price: 371
+                pizzaPrice: 34600,
+                boxPrice: 2500,
+                price: 37100
             }
         ]
     },
@@ -946,30 +946,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 34,
                 size: "30cm",
-                pizzaPrice: 162,
-                boxPrice: 13,
-                price: 175
+                pizzaPrice: 16200,
+                boxPrice: 1300,
+                price: 17500
             },
             {
                 varId: 35,
                 size: "35cm",
-                pizzaPrice: 186,
-                boxPrice: 15,
-                price: 201
+                pizzaPrice: 18600,
+                boxPrice: 1500,
+                price: 20100
             },
             {
                 varId: 36,
                 size: "40cm",
-                pizzaPrice: 263,
-                boxPrice: 18,
-                price: 281
+                pizzaPrice: 26300,
+                boxPrice: 1800,
+                price: 28100
             },
             {
                 varId: 37,
                 size: "50cm",
-                pizzaPrice: 346,
-                boxPrice: 25,
-                price: 371
+                pizzaPrice: 34600,
+                boxPrice: 2500,
+                price: 37100
             }
         ]
     },
@@ -987,30 +987,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 38,
                 size: "30cm",
-                pizzaPrice: 162,
-                boxPrice: 13,
-                price: 175
+                pizzaPrice: 16200,
+                boxPrice: 1300,
+                price: 17500
             },
             {
                 varId: 39,
                 size: "35cm",
-                pizzaPrice: 186,
-                boxPrice: 15,
-                price: 201
+                pizzaPrice: 18600,
+                boxPrice: 1500,
+                price: 20100
             },
             {
                 varId: 40,
                 size: "40cm",
-                pizzaPrice: 263,
-                boxPrice: 18,
-                price: 281
+                pizzaPrice: 26300,
+                boxPrice: 1800,
+                price: 28100
             },
             {
                 varId: 41,
                 size: "50cm",
-                pizzaPrice: 346,
-                boxPrice: 25,
-                price: 371
+                pizzaPrice: 34600,
+                boxPrice: 2500,
+                price: 37100
             }
         ]
     },
@@ -1028,30 +1028,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 42,
                 size: "30cm",
-                pizzaPrice: 172,
-                boxPrice: 13,
-                price: 185
+                pizzaPrice: 17200,
+                boxPrice: 1300,
+                price: 18500
             },
             {
                 varId: 43,
                 size: "35cm",
-                pizzaPrice: 212,
-                boxPrice: 15,
-                price: 227
+                pizzaPrice: 21200,
+                boxPrice: 1500,
+                price: 22700
             },
             {
                 varId: 44,
                 size: "40cm",
-                pizzaPrice: 293,
-                boxPrice: 18,
-                price: 311
+                pizzaPrice: 29300,
+                boxPrice: 1800,
+                price: 31100
             },
             {
                 varId: 45,
                 size: "50cm",
-                pizzaPrice: 376,
-                boxPrice: 25,
-                price: 401
+                pizzaPrice: 37600,
+                boxPrice: 2500,
+                price: 40100
             }
         ]
     },
@@ -1069,30 +1069,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 46,
                 size: "30cm",
-                pizzaPrice: 182,
-                boxPrice: 13,
-                price: 195
+                pizzaPrice: 18200,
+                boxPrice: 1300,
+                price: 19500
             },
             {
                 varId: 47,
                 size: "35cm",
-                pizzaPrice: 222,
-                boxPrice: 15,
-                price: 237
+                pizzaPrice: 22200,
+                boxPrice: 1500,
+                price: 23700
             },
             {
                 varId: 48,
                 size: "40cm",
-                pizzaPrice: 303,
-                boxPrice: 18,
-                price: 321
+                pizzaPrice: 30300,
+                boxPrice: 1800,
+                price: 32100
             },
             {
                 varId: 49,
                 size: "50cm",
-                pizzaPrice: 386,
-                boxPrice: 25,
-                price: 411
+                pizzaPrice: 38600,
+                boxPrice: 2500,
+                price: 41100
             }
         ]
     },
@@ -1114,30 +1114,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 50,
                 size: "30cm",
-                pizzaPrice: 182,
-                boxPrice: 13,
-                price: 195
+                pizzaPrice: 18200,
+                boxPrice: 1300,
+                price: 19500
             },
             {
                 varId: 51,
                 size: "35cm",
-                pizzaPrice: 222,
-                boxPrice: 15,
-                price: 237
+                pizzaPrice: 22200,
+                boxPrice: 1500,
+                price: 23700
             },
             {
                 varId: 52,
                 size: "40cm",
-                pizzaPrice: 303,
-                boxPrice: 18,
-                price: 321
+                pizzaPrice: 30300,
+                boxPrice: 1800,
+                price: 32100
             },
             {
                 varId: 53,
                 size: "50cm",
-                pizzaPrice: 396,
-                boxPrice: 25,
-                price: 421
+                pizzaPrice: 39600,
+                boxPrice: 2500,
+                price: 42100
             }
         ]
     },
@@ -1156,30 +1156,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 54,
                 size: "30cm",
-                pizzaPrice: 182,
-                boxPrice: 13,
-                price: 195
+                pizzaPrice: 18200,
+                boxPrice: 1300,
+                price: 19500
             },
             {
                 varId: 55,
                 size: "35cm",
-                pizzaPrice: 222,
-                boxPrice: 15,
-                price: 237
+                pizzaPrice: 22200,
+                boxPrice: 1500,
+                price: 23700
             },
             {
                 varId: 56,
                 size: "40cm",
-                pizzaPrice: 303,
-                boxPrice: 18,
-                price: 321
+                pizzaPrice: 30300,
+                boxPrice: 1800,
+                price: 32100
             },
             {
                 varId: 57,
                 size: "50cm",
-                pizzaPrice: 396,
-                boxPrice: 25,
-                price: 421
+                pizzaPrice: 39600,
+                boxPrice: 2500,
+                price: 42100
             }
         ]
     },
@@ -1199,30 +1199,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 58,
                 size: "30cm",
-                pizzaPrice: 182,
-                boxPrice: 13,
-                price: 195
+                pizzaPrice: 18200,
+                boxPrice: 1300,
+                price: 19500
             },
             {
                 varId: 59,
                 size: "35cm",
-                pizzaPrice: 222,
-                boxPrice: 15,
-                price: 237
+                pizzaPrice: 22200,
+                boxPrice: 1500,
+                price: 23700
             },
             {
                 varId: 60,
                 size: "40cm",
-                pizzaPrice: 303,
-                boxPrice: 18,
-                price: 321
+                pizzaPrice: 30300,
+                boxPrice: 1800,
+                price: 32100
             },
             {
                 varId: 61,
                 size: "50cm",
-                pizzaPrice: 396,
-                boxPrice: 25,
-                price: 421
+                pizzaPrice: 39600,
+                boxPrice: 2500,
+                price: 42100
             }
         ]
     },
@@ -1241,30 +1241,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 62,
                 size: "30cm",
-                pizzaPrice: 188,
-                boxPrice: 13,
-                price: 201
+                pizzaPrice: 18800,
+                boxPrice: 1300,
+                price: 20100
             },
             {
                 varId: 63,
                 size: "35cm",
-                pizzaPrice: 226,
-                boxPrice: 15,
-                price: 241
+                pizzaPrice: 22600,
+                boxPrice: 1500,
+                price: 24100
             },
             {
                 varId: 64,
                 size: "40cm",
-                pizzaPrice: 313,
-                boxPrice: 18,
-                price: 331
+                pizzaPrice: 31300,
+                boxPrice: 1800,
+                price: 33100
             },
             {
                 varId: 65,
                 size: "50cm",
-                pizzaPrice: 426,
-                boxPrice: 25,
-                price: 451
+                pizzaPrice: 42600,
+                boxPrice: 2500,
+                price: 45100
             }
         ]
     },
@@ -1283,30 +1283,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 66,
                 size: "30cm",
-                pizzaPrice: 188,
-                boxPrice: 13,
-                price: 201
+                pizzaPrice: 18800,
+                boxPrice: 1300,
+                price: 20100
             },
             {
                 varId: 67,
                 size: "35cm",
-                pizzaPrice: 226,
-                boxPrice: 15,
-                price: 241
+                pizzaPrice: 22600,
+                boxPrice: 1500,
+                price: 24100
             },
             {
                 varId: 68,
                 size: "40cm",
-                pizzaPrice: 313,
-                boxPrice: 18,
-                price: 331
+                pizzaPrice: 31300,
+                boxPrice: 1800,
+                price: 33100
             },
             {
                 varId: 69,
                 size: "50cm",
-                pizzaPrice: 426,
-                boxPrice: 25,
-                price: 451
+                pizzaPrice: 42600,
+                boxPrice: 2500,
+                price: 45100
             }
         ]
     },
@@ -1327,30 +1327,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 309,
                 size: "30cm",
-                pizzaPrice: 182,
-                boxPrice: 13,
-                price: 195
+                pizzaPrice: 18200,
+                boxPrice: 1300,
+                price: 19500
             },
             {
                 varId: 310,
                 size: "35cm",
-                pizzaPrice: 222,
-                boxPrice: 15,
-                price: 237
+                pizzaPrice: 22200,
+                boxPrice: 1500,
+                price: 23700
             },
             {
                 varId: 311,
                 size: "40cm",
-                pizzaPrice: 303,
-                boxPrice: 18,
-                price: 321
+                pizzaPrice: 30300,
+                boxPrice: 1800,
+                price: 32100
             },
             {
                 varId: 312,
                 size: "50cm",
-                pizzaPrice: 396,
-                boxPrice: 25,
-                price: 421
+                pizzaPrice: 39600,
+                boxPrice: 2500,
+                price: 42100
             }
         ]
     },
@@ -1369,30 +1369,30 @@ const MOCK_PIZZA_LIST = [
             {
                 varId: 394,
                 size: "30cm",
-                pizzaPrice: 188,
-                boxPrice: 13,
-                price: 201
+                pizzaPrice: 18800,
+                boxPrice: 1300,
+                price: 20100
             },
             {
                 varId: 395,
                 size: "35cm",
-                pizzaPrice: 226,
-                boxPrice: 15,
-                price: 241
+                pizzaPrice: 22600,
+                boxPrice: 1500,
+                price: 24100
             },
             {
                 varId: 396,
                 size: "40cm",
-                pizzaPrice: 313,
-                boxPrice: 18,
-                price: 331
+                pizzaPrice: 31300,
+                boxPrice: 1800,
+                price: 33100
             },
             {
                 varId: 397,
                 size: "50cm",
-                pizzaPrice: 426,
-                boxPrice: 25,
-                price: 451
+                pizzaPrice: 42600,
+                boxPrice: 2500,
+                price: 45100
             }
         ]
     }
@@ -1434,22 +1434,22 @@ const MOCK_SALAT_LIST = [
     {
         name: "Greek",
         ingredients: ["Salát", "Černé olivy", "Paprika mix", "Červená cibule", "Rajčata", "Okurka salátová", "Jogurtový dresing"],
-        price: 174 + 13,
+        price: (174 + 13) * 100,
     },
     {
         name: "Caesar",
         ingredients: ["Salát", "Rajčata", "Kuřecí maso", "Krutony", "Parmazán", "Caesar dresing", "Olivový olej"],
-        price: 184 + 13,
+        price: (184 + 13) * 100,
     },
     {
         name: "Šopský salát",
         ingredients: ["Salátová okurka", "Rajčata", "Paprika mix", "Červená cibule", "Balkánský sýr"],
-        price: 164 + 13,
+        price: (164 + 13) * 100,
     },
     {
         name: "Těstovinový salát",
         ingredients: ["Penne", "Okurka", "Rajčata", "Paprika mix", "Kuřecí maso", "Jogurtový dresing"],
-        price: 184 + 13,
+        price: (184 + 13) * 100,
     },
 ]
 

server/src/pizza.ts

@@ -10,10 +10,6 @@ import crypto from "crypto";
 const storage = getStorage();
 const PENDING_QR_PREFIX = 'pending_qr';
 
-/**
- * Vrátí seznam dostupných pizz pro dnešní den.
- * Stáhne je, pokud je pro dnešní den nemá.
- */
 export async function getPizzaList(): Promise<Pizza[] | undefined> {
     await initIfNeeded();
     let clientData = await getClientData(getToday());
@@ -24,25 +20,17 @@ export async function getPizzaList(): Promise<Pizza[] | undefined> {
     return Promise.resolve(clientData.pizzaList);
 }
 
-/**
- * Uloží seznam dostupných pizz pro dnešní den.
- *
- * @param pizzaList seznam dostupných pizz
- */
 export async function savePizzaList(pizzaList: Pizza[]): Promise<ClientData> {
     await initIfNeeded();
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    clientData.pizzaList = pizzaList;
-    clientData.pizzaListLastUpdate = formatDate(new Date());
-    await storage.setData(today, clientData);
-    return clientData;
+    return storage.updateData<ClientData>(today, (current) => {
+        const data = current ?? ({} as ClientData);
+        data.pizzaList = pizzaList;
+        data.pizzaListLastUpdate = formatDate(new Date());
+        return data;
+    });
 }
 
-/**
- * Vrátí seznam dostupných salátů pro dnešní den.
- * Stáhne je, pokud je pro dnešní den nemá.
- */
 export async function getSalatList(): Promise<Salat[] | undefined> {
     await initIfNeeded();
     let clientData = await getClientData(getToday());
@@ -53,423 +41,250 @@ export async function getSalatList(): Promise<Salat[] | undefined> {
     return Promise.resolve(clientData.salatList);
 }
 
-/**
- * Uloží seznam dostupných salátů pro dnešní den.
- *
- * @param salatList seznam dostupných salátů
- */
 export async function saveSalatList(salatList: Salat[]): Promise<ClientData> {
     await initIfNeeded();
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    clientData.salatList = salatList;
-    await storage.setData(today, clientData);
-    return clientData;
+    return storage.updateData<ClientData>(today, (current) => {
+        const data = current ?? ({} as ClientData);
+        data.salatList = salatList;
+        return data;
+    });
 }
 
-/**
- * Vytvoří pizza day pro aktuální den a vrátí data pro klienta.
- */
 export async function createPizzaDay(creator: string): Promise<ClientData> {
     await initIfNeeded();
-    const clientData = await getClientData(getToday());
-    if (clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den již existuje");
-    }
-    // TODO berka rychlooprava, vyřešit lépe - stahovat jednou, na jediném místě!
+    // Stáhneme pizzy a saláty před samotnou atomickou operací
     const [pizzaList, salatList] = await Promise.all([getPizzaList(), getSalatList()]);
-    const data: ClientData = { pizzaDay: { state: PizzaDayState.CREATED, creator, orders: [] }, pizzaList, salatList, ...clientData };
     const today = formatDate(getToday());
-    await storage.setData(today, data);
-    callNotifikace({ input: { udalost: UdalostEnum.ZAHAJENA_PIZZA, user: creator } })
-    return data;
+    const result = await storage.updateData<ClientData>(today, (current) => {
+        if (!current) throw Error("Data pro dnešní den nejsou inicializována");
+        if (current.pizzaDay) throw Error("Pizza day pro dnešní den již existuje");
+        return { ...current, pizzaDay: { state: PizzaDayState.CREATED, creator, orders: [] }, pizzaList, salatList };
+    });
+    callNotifikace({ input: { udalost: UdalostEnum.ZAHAJENA_PIZZA, user: creator } });
+    return result;
 }
 
-/**
- * Smaže pizza day pro aktuální den.
- */
 export async function deletePizzaDay(login: string): Promise<ClientData> {
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Login uživatele se neshoduje se zakladatelem Pizza Day");
-    }
-    delete clientData.pizzaDay;
     const today = formatDate(getToday());
-    await storage.setData(today, clientData);
-    return clientData;
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.creator !== login) throw Error("Login uživatele se neshoduje se zakladatelem Pizza Day");
+        const data = { ...current };
+        delete data.pizzaDay;
+        return data;
+    });
 }
 
-/**
- * Přidá objednávku pizzy uživateli.
- * 
- * @param login login uživatele
- * @param pizza zvolená pizza
- * @param size zvolená velikost pizzy
- */
 export async function addPizzaOrder(login: string, pizza: Pizza, size: PizzaSize) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
-    }
-    let order: PizzaOrder | undefined = clientData.pizzaDay?.orders?.find(o => o.customer === login);
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.state !== PizzaDayState.CREATED) throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
+        let order: PizzaOrder | undefined = current.pizzaDay.orders?.find(o => o.customer === login);
         if (!order) {
-        order = {
-            customer: login,
-            pizzaList: [],
-            totalPrice: 0,
-            hasQr: false,
-        }
-        clientData.pizzaDay.orders ??= [];
-        clientData.pizzaDay.orders.push(order);
-    }
-    const pizzaOrder: PizzaVariant = {
-        varId: size.varId,
-        name: pizza.name,
-        size: size.size,
-        price: size.price,
+            order = { customer: login, pizzaList: [], totalPrice: 0, hasQr: false };
+            current.pizzaDay.orders ??= [];
+            current.pizzaDay.orders.push(order);
         }
+        const pizzaOrder: PizzaVariant = { varId: size.varId, name: pizza.name, size: size.size, price: size.price };
         order.pizzaList ??= [];
         order.pizzaList.push(pizzaOrder);
         order.totalPrice += pizzaOrder.price;
-    await storage.setData(today, clientData);
-    return clientData;
+        return current;
+    });
 }
 
-/**
- * Přidá objednávku salátu uživateli.
- *
- * @param login login uživatele
- * @param salat zvolený salát
- */
 export async function addSalatOrder(login: string, salat: Salat) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
-    }
-    let order: PizzaOrder | undefined = clientData.pizzaDay?.orders?.find(o => o.customer === login);
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.state !== PizzaDayState.CREATED) throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
+        let order: PizzaOrder | undefined = current.pizzaDay.orders?.find(o => o.customer === login);
         if (!order) {
-        order = {
-            customer: login,
-            pizzaList: [],
-            totalPrice: 0,
-            hasQr: false,
-        }
-        clientData.pizzaDay.orders ??= [];
-        clientData.pizzaDay.orders.push(order);
-    }
-    const salatOrder: PizzaVariant = {
-        varId: 0,
-        name: salat.name,
-        size: "1 porce",
-        price: salat.price,
-        category: 'salat',
+            order = { customer: login, pizzaList: [], totalPrice: 0, hasQr: false };
+            current.pizzaDay.orders ??= [];
+            current.pizzaDay.orders.push(order);
         }
+        const salatOrder: PizzaVariant = { varId: 0, name: salat.name, size: "1 porce", price: salat.price, category: 'salat' };
         order.pizzaList ??= [];
         order.pizzaList.push(salatOrder);
         order.totalPrice += salatOrder.price;
-    await storage.setData(today, clientData);
-    return clientData;
+        return current;
+    });
 }
 
-/**
- * Odstraní všechny pizzy uživatele (celou jeho objednávku).
- * Pokud Pizza day neexistuje nebo není ve stavu CREATED, neudělá nic.
- *
- * @param login login uživatele
- * @param date datum, pro které se objednávka odstraňuje (výchozí je dnešek)
- * @returns aktuální data pro klienta
- */
 export async function removeAllUserPizzas(login: string, date?: Date) {
     const usedDate = date ?? getToday();
     const today = formatDate(usedDate);
-    const clientData = await getClientData(usedDate);
-
-    if (!clientData.pizzaDay) {
-        return clientData; // Pizza day neexistuje, není co mazat
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) return current ?? ({} as ClientData);
+        if (current.pizzaDay.state !== PizzaDayState.CREATED) return current;
+        const orderIndex = current.pizzaDay.orders!.findIndex(o => o.customer === login);
+        if (orderIndex >= 0) current.pizzaDay.orders!.splice(orderIndex, 1);
+        return current;
+    });
 }
 
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED) {
-        return clientData; // Pizza day není ve stavu CREATED, nelze mazat
-    }
-
-    const orderIndex = clientData.pizzaDay.orders!.findIndex(o => o.customer === login);
-    if (orderIndex >= 0) {
-        clientData.pizzaDay.orders!.splice(orderIndex, 1);
-        await storage.setData(today, clientData);
-    }
-
-    return clientData;
-}
-
-/**
- * Odstraní danou objednávku pizzy.
- *
- * @param login login uživatele
- * @param pizzaOrder objednávka pizzy
- */
 export async function removePizzaOrder(login: string, pizzaOrder: PizzaVariant) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    const orderIndex = clientData.pizzaDay.orders!.findIndex(o => o.customer === login);
-    if (orderIndex < 0) {
-        throw Error("Nebyly nalezeny žádné objednávky pro uživatele " + login);
-    }
-    const order = clientData.pizzaDay.orders![orderIndex];
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        const orderIndex = current.pizzaDay.orders!.findIndex(o => o.customer === login);
+        if (orderIndex < 0) throw Error("Nebyly nalezeny žádné objednávky pro uživatele " + login);
+        const order = current.pizzaDay.orders![orderIndex];
         const index = order.pizzaList!.findIndex(o => o.name === pizzaOrder.name && o.size === pizzaOrder.size);
-    if (index < 0) {
-        throw Error("Objednávka s danými parametry nebyla nalezena");
-    }
+        if (index < 0) throw Error("Objednávka s danými parametry nebyla nalezena");
         const price = order.pizzaList![index].price;
         order.pizzaList!.splice(index, 1);
         order.totalPrice -= price;
-    if (order.pizzaList!.length == 0) {
-        clientData.pizzaDay.orders!.splice(orderIndex, 1);
-    }
-    await storage.setData(today, clientData);
-    return clientData;
+        if (order.pizzaList!.length === 0) current.pizzaDay.orders!.splice(orderIndex, 1);
+        return current;
+    });
 }
 
-/**
- * Uzamkne možnost editovat objednávky pizzy.
- *
- * @param login login uživatele
- * @returns aktuální data pro uživatele
- */
 export async function lockPizzaDay(login: string) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Pizza day není spravován uživatelem " + login);
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED && clientData.pizzaDay.state !== PizzaDayState.ORDERED) {
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.creator !== login) throw Error("Pizza day není spravován uživatelem " + login);
+        if (current.pizzaDay.state !== PizzaDayState.CREATED && current.pizzaDay.state !== PizzaDayState.ORDERED) {
             throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED + " nebo " + PizzaDayState.ORDERED);
         }
-    clientData.pizzaDay.state = PizzaDayState.LOCKED;
-    await storage.setData(today, clientData);
-    return clientData;
+        current.pizzaDay.state = PizzaDayState.LOCKED;
+        return current;
+    });
 }
 
-/**
- * Odekmne možnost editovat objednávky pizzy.
- *
- * @param login login uživatele
- * @returns aktuální data pro uživatele
- */
 export async function unlockPizzaDay(login: string) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Pizza day není spravován uživatelem " + login);
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.LOCKED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.LOCKED);
-    }
-    clientData.pizzaDay.state = PizzaDayState.CREATED;
-    await storage.setData(today, clientData);
-    return clientData;
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.creator !== login) throw Error("Pizza day není spravován uživatelem " + login);
+        if (current.pizzaDay.state !== PizzaDayState.LOCKED) throw Error("Pizza day není ve stavu " + PizzaDayState.LOCKED);
+        current.pizzaDay.state = PizzaDayState.CREATED;
+        return current;
+    });
 }
 
-/**
- * Nastaví stav pizza day na "pizzy objednány".
- *
- * @param login login uživatele
- * @returns aktuální data pro uživatele
- */
 export async function finishPizzaOrder(login: string) {
     const today = formatDate(getToday());
-    const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Pizza day není spravován uživatelem " + login);
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.LOCKED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.LOCKED);
-    }
-    clientData.pizzaDay.state = PizzaDayState.ORDERED;
-    await storage.setData(today, clientData);
-    callNotifikace({ input: { udalost: UdalostEnum.OBJEDNANA_PIZZA, user: clientData?.pizzaDay?.creator } })
-    return clientData;
+    const result = await storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.creator !== login) throw Error("Pizza day není spravován uživatelem " + login);
+        if (current.pizzaDay.state !== PizzaDayState.LOCKED) throw Error("Pizza day není ve stavu " + PizzaDayState.LOCKED);
+        current.pizzaDay.state = PizzaDayState.ORDERED;
+        return current;
+    });
+    callNotifikace({ input: { udalost: UdalostEnum.OBJEDNANA_PIZZA, user: result.pizzaDay!.creator! } });
+    return result;
 }
 
-/**
- * Nastaví stav pizza day na "pizzy doručeny".
- * Vygeneruje QR kódy pro všechny objednatele, pokud objednávající má vyplněné číslo účtu a jméno.
- *
- * @param login login uživatele
- * @returns aktuální data pro uživatele
- */
 export async function finishPizzaDelivery(login: string, bankAccount?: string, bankAccountHolder?: string) {
     const today = formatDate(getToday());
+    // Načteme aktuální data pro přípravu QR (potřebujeme objednávky)
     const clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Pizza day není spravován uživatelem " + login);
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.ORDERED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.ORDERED);
-    }
-    clientData.pizzaDay.state = PizzaDayState.DELIVERED;
+    if (!clientData.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+    if (clientData.pizzaDay.creator !== login) throw Error("Pizza day není spravován uživatelem " + login);
+    if (clientData.pizzaDay.state !== PizzaDayState.ORDERED) throw Error("Pizza day není ve stavu " + PizzaDayState.ORDERED);
 
-    // Vygenerujeme QR kód, pokud k tomu máme data
+    // Generujeme QR kódy před atomickým zápisem
+    const pendingQrs: Array<{ customer: string; id: string; pendingQr: PendingQr }> = [];
     if (bankAccount?.length && bankAccountHolder?.length) {
         for (const order of clientData.pizzaDay.orders!) {
-            if (order.customer !== login) { // zatím platí creator = objednávající, a pro toho nemá QR kód smysl
+            if (order.customer !== login) {
                 const id = crypto.randomUUID();
-                let message = order.pizzaList!.map(item =>
+                const message = order.pizzaList!.map(item =>
                     item.category === 'salat' ? `Salát ${item.name}` : `Pizza ${item.name} (${item.size})`
                 ).join(', ');
-                await generateQr(order.customer, bankAccount, bankAccountHolder, order.totalPrice, message, id);
-                order.hasQr = true;
-                // Uložíme nevyřízený QR kód pro persistentní zobrazení
-                await addPendingQr(order.customer, {
-                    id,
-                    date: today,
-                    creator: login,
-                    totalPrice: order.totalPrice,
-                    purpose: message,
+                await generateQr(order.customer, bankAccount, bankAccountHolder, order.totalPrice / 100, message, id);
+                pendingQrs.push({
+                    customer: order.customer, id, pendingQr: {
+                        id, date: today, creator: login, totalPrice: order.totalPrice, purpose: message,
+                    },
                 });
             }
         }
     }
-    await storage.setData(today, clientData);
-    return clientData;
+
+    const result = await storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        current.pizzaDay.state = PizzaDayState.DELIVERED;
+        for (const { customer } of pendingQrs) {
+            const order = current.pizzaDay.orders!.find(o => o.customer === customer);
+            if (order) { order.hasQr = true; }
+        }
+        return current;
+    });
+
+    // Uložení nevyřízených QR kódů mimo hlavní transakci (per-user klíče)
+    for (const { customer, pendingQr } of pendingQrs) {
+        await addPendingQr(customer, pendingQr);
+    }
+
+    return result;
 }
 
-/**
- * Aktualizuje poznámku k Pizza day uživatele.
- * 
- * @param login přihlašovací jméno uživatele
- * @param note nová poznámka k Pizza day
- * @returns aktuální klientská data
- */
 export async function updatePizzaDayNote(login: string, note?: string) {
     const today = formatDate(getToday());
-    let clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED) {
-        throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
-    }
-    const myOrder = clientData.pizzaDay.orders!.find(o => o.customer === login);
-    if (!myOrder?.pizzaList?.length) {
-        throw Error("Pizza day neobsahuje žádné objednávky uživatele " + login);
-    }
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.state !== PizzaDayState.CREATED) throw Error("Pizza day není ve stavu " + PizzaDayState.CREATED);
+        const myOrder = current.pizzaDay.orders!.find(o => o.customer === login);
+        if (!myOrder?.pizzaList?.length) throw Error("Pizza day neobsahuje žádné objednávky uživatele " + login);
         myOrder.note = note;
-    await storage.setData(today, clientData);
-    return clientData;
+        return current;
+    });
 }
 
-/**
- * Aktualizuje příplatek uživatele k objednávce pizzy.
- * V případě nevyplnění ceny je příplatek odebrán.
- * 
- * @param login přihlašovací jméno aktuálního uživatele
- * @param targetLogin přihlašovací jméno uživatele, kterému je nastavován příplatek
- * @param text text popisující příplatek
- * @param price celková cena příplatku
- */
 export async function updatePizzaFee(login: string, targetLogin: string, text?: string, price?: number) {
     const today = formatDate(getToday());
-    let clientData = await getClientData(getToday());
-    if (!clientData.pizzaDay) {
-        throw Error("Pizza day pro dnešní den neexistuje");
-    }
-    if (clientData.pizzaDay.state !== PizzaDayState.CREATED) {
-        throw Error(`Pizza day není ve stavu ${PizzaDayState.CREATED}`);
-    }
-    if (clientData.pizzaDay.creator !== login) {
-        throw Error("Příplatky může měnit pouze zakladatel Pizza day");
-    }
-    const targetOrder = clientData.pizzaDay.orders!.find(o => o.customer === targetLogin);
-    if (!targetOrder?.pizzaList?.length) {
-        throw Error(`Pizza day neobsahuje žádné objednávky uživatele ${targetLogin}`);
-    }
+    return storage.updateData<ClientData>(today, (current) => {
+        if (!current?.pizzaDay) throw Error("Pizza day pro dnešní den neexistuje");
+        if (current.pizzaDay.state !== PizzaDayState.CREATED) throw Error(`Pizza day není ve stavu ${PizzaDayState.CREATED}`);
+        if (current.pizzaDay.creator !== login) throw Error("Příplatky může měnit pouze zakladatel Pizza day");
+        const targetOrder = current.pizzaDay.orders!.find(o => o.customer === targetLogin);
+        if (!targetOrder?.pizzaList?.length) throw Error(`Pizza day neobsahuje žádné objednávky uživatele ${targetLogin}`);
         if (!price) {
             delete targetOrder.fee;
         } else {
             targetOrder.fee = { text, price };
         }
-    // Přepočet ceny
-    targetOrder.totalPrice = targetOrder.pizzaList.reduce((price, pizzaOrder) => price + pizzaOrder.price, 0) + (targetOrder.fee?.price ?? 0);
-    await storage.setData(today, clientData);
-    return clientData;
+        targetOrder.totalPrice = targetOrder.pizzaList.reduce((p, o) => p + o.price, 0) + (targetOrder.fee?.price ?? 0);
+        return current;
+    });
 }
 
-/**
- * Vrátí klíč pro uložení nevyřízených QR kódů uživatele.
- */
 function getPendingQrKey(login: string): string {
     return `${PENDING_QR_PREFIX}_${login}`;
 }
 
-/**
- * Přidá nevyřízený QR kód pro uživatele.
- */
 export async function addPendingQr(login: string, pendingQr: PendingQr): Promise<void> {
-    const key = getPendingQrKey(login);
-    const existing = await storage.getData<PendingQr[]>(key) ?? [];
-    // Deduplikace podle id (ne podle data — jeden den může mít uživatel víc QR kódů)
-    if (!existing.some(qr => qr.id === pendingQr.id)) {
-        existing.push(pendingQr);
-        await storage.setData(key, existing);
-    }
+    await storage.updateData<PendingQr[]>(getPendingQrKey(login), (current) => {
+        const existing = current ?? [];
+        if (!existing.some(qr => qr.id === pendingQr.id)) existing.push(pendingQr);
+        return existing;
+    });
 }
 
-/**
- * Vrátí nevyřízené QR kódy pro uživatele.
- */
 export async function getPendingQrs(login: string): Promise<PendingQr[]> {
     return await storage.getData<PendingQr[]>(getPendingQrKey(login)) ?? [];
 }
 
-/**
- * Označí QR kód jako uhrazený (odstraní ho ze seznamu nevyřízených).
- * Vrátí odstraněný QR kód, pokud byl nalezen.
- */
 export async function dismissPendingQr(login: string, id: string): Promise<PendingQr | undefined> {
-    const key = getPendingQrKey(login);
-    const existing = await storage.getData<PendingQr[]>(key) ?? [];
-    const dismissed = existing.find(qr => qr.id === id);
-    const filtered = existing.filter(qr => qr.id !== id);
-    await storage.setData(key, filtered);
+    let dismissed: PendingQr | undefined;
+    await storage.updateData<PendingQr[]>(getPendingQrKey(login), (current) => {
+        const existing = current ?? [];
+        dismissed = existing.find(qr => qr.id === id);
+        return existing.filter(qr => qr.id !== id);
+    });
     return dismissed;
 }
 
-/**
- * Odstraní všechny nevyřízené QR kódy patřící dané skupině objednávky.
- */
 export async function removePendingQrsByGroupId(logins: string[], groupId: string): Promise<void> {
     for (const login of logins) {
-        const key = getPendingQrKey(login);
-        const existing = await storage.getData<PendingQr[]>(key) ?? [];
-        const filtered = existing.filter(qr => qr.groupId !== groupId);
-        if (filtered.length !== existing.length) {
-            await storage.setData(key, filtered);
-        }
+        await storage.updateData<PendingQr[]>(getPendingQrKey(login), (current) => {
+            return (current ?? []).filter(qr => qr.groupId !== groupId);
+        });
     }
 }

server/src/pushReminder.ts

@@ -1,12 +1,17 @@
 import webpush from 'web-push';
 import crypto from 'crypto';
 import getStorage from './storage';
+import { getRedisClient } from './storage/redis';
 import { getClientData, getToday } from './service';
 import { getIsWeekend } from './utils';
 import { LunchChoices } from '../../types';
 
 const storage = getStorage();
 const REGISTRY_KEY = 'push_reminder_registry';
+const LEADER_LEASE_KEY = 'luncher:reminder:leader';
+const LEASE_TTL_SECONDS = 90;
+
+const POD_ID = process.env.POD_ID ?? `local-${process.pid}`;
 
 interface RegistryEntry {
     time: string;
@@ -20,6 +25,8 @@ const lastReminded = new Map<string, number>();
 
 const REMINDER_COOLDOWN_MS = 60 * 60 * 1000; // 60 minut mezi připomínkami
 
+let reminderInterval: ReturnType<typeof setInterval> | undefined;
+
 function getCurrentTimeHHMM(): string {
     const now = new Date();
     return `${String(now.getHours()).padStart(2, '0')}:${String(now.getMinutes()).padStart(2, '0')}`;
@@ -36,27 +43,76 @@ function userHasChoice(choices: LunchChoices, login: string): boolean {
     return false;
 }
 
-async function getRegistry(): Promise<Registry> {
-    return await storage.getData<Registry>(REGISTRY_KEY) ?? {};
+/**
+ * Pokusí se získat nebo obnovit leader lease pro scheduler připomínek.
+ * Vrátí true pokud tato instance smí spustit připomínky.
+ * Při non-Redis storage vždy vrací true (single-process, leader election není potřeba).
+ */
+async function tryAcquireOrRenewLease(): Promise<boolean> {
+    if (process.env.STORAGE?.toLowerCase() !== 'redis') return true;
+    try {
+        const c = getRedisClient();
+        if (!c) return true;
+
+        // Zkusíme získat lease atomicky (SET NX EX)
+        const acquired = await c.set(LEADER_LEASE_KEY, POD_ID, { NX: true, EX: LEASE_TTL_SECONDS });
+        if (acquired !== null) return true; // lease čerstvě získána
+
+        // Pokud jsme ji nedostali, ověříme zda ji držíme my
+        const currentHolder = await c.get(LEADER_LEASE_KEY);
+        if (currentHolder === POD_ID) {
+            // Naše lease — obnovíme TTL
+            await c.set(LEADER_LEASE_KEY, POD_ID, { EX: LEASE_TTL_SECONDS });
+            return true;
+        }
+        return false; // lease drží jiná instance
+    } catch (e) {
+        console.error('Push reminder: chyba při získávání lease, připomínky budou odeslány', e);
+        return true; // při chybě raději spustíme, než vynecháme
+    }
 }
 
-async function saveRegistry(registry: Registry): Promise<void> {
-    await storage.setData(REGISTRY_KEY, registry);
+/** Uvolní leader lease při graceful shutdown. */
+export async function releaseReminderLease(): Promise<void> {
+    if (process.env.STORAGE?.toLowerCase() !== 'redis') return;
+    try {
+        const c = getRedisClient();
+        if (!c) return;
+        const currentHolder = await c.get(LEADER_LEASE_KEY);
+        if (currentHolder === POD_ID) {
+            await c.del(LEADER_LEASE_KEY);
+            console.log('Push reminder: lease uvolněna');
+        }
+    } catch (e) {
+        console.error('Push reminder: chyba při uvolňování lease', e);
+    }
+}
+
+/** Stopne scheduler připomínek. Volá se při graceful shutdown. */
+export function stopReminderScheduler(): void {
+    if (reminderInterval) {
+        clearInterval(reminderInterval);
+        reminderInterval = undefined;
+    }
 }
 
 /** Přidá nebo aktualizuje push subscription pro uživatele. */
 export async function subscribePush(login: string, subscription: webpush.PushSubscription, reminderTime: string): Promise<void> {
-    const registry = await getRegistry();
+    await storage.updateData<Registry>(REGISTRY_KEY, (current) => {
+        const registry = current ?? {};
         registry[login] = { time: reminderTime, subscription };
-    await saveRegistry(registry);
+        return registry;
+    });
     console.log(`Push reminder: uživatel ${login} přihlášen k připomínkám v ${reminderTime}`);
 }
 
 /** Odebere push subscription pro uživatele. */
 export async function unsubscribePush(login: string): Promise<void> {
-    const registry = await getRegistry();
+    await storage.updateData<Registry>(REGISTRY_KEY, (current) => {
+        const registry = current ?? {};
         delete registry[login];
-    await saveRegistry(registry);
+        return registry;
+    });
     lastReminded.delete(login);
     console.log(`Push reminder: uživatel ${login} odhlášen z připomínek`);
 }
@@ -79,23 +135,20 @@ export function verifyQuickChoiceToken(login: string, token: string): boolean {
     return crypto.timingSafeEqual(Buffer.from(expected, 'hex'), Buffer.from(token, 'hex'));
 }
 
-
 /** Zkontroluje a odešle připomínky uživatelům, kteří si nezvolili oběd. */
 async function checkAndSendReminders(): Promise<void> {
-    // Přeskočit víkendy
-    if (getIsWeekend(getToday())) {
-        return;
-    }
+    if (getIsWeekend(getToday())) return;
 
-    const registry = await getRegistry();
+    // Leader election — pouze jeden pod spouští připomínky
+    const isLeader = await tryAcquireOrRenewLease();
+    if (!isLeader) return;
+
+    const registry = await storage.getData<Registry>(REGISTRY_KEY) ?? {};
     const entries = Object.entries(registry);
-    if (entries.length === 0) {
-        return;
-    }
+    if (entries.length === 0) return;
 
     const currentTime = getCurrentTimeHHMM();
 
-    // Získáme data pro dnešek jednou pro všechny uživatele
     let clientData;
     try {
         clientData = await getClientData(getToday());
@@ -104,24 +157,16 @@ async function checkAndSendReminders(): Promise<void> {
         return;
     }
 
+    const expiredLogins: string[] = [];
+
     for (const [login, entry] of entries) {
-        // Ještě nedosáhl čas připomínky
-        if (currentTime < entry.time) {
-            continue;
-        }
+        if (currentTime < entry.time) continue;
 
-        // Cooldown — nepřipomínat častěji než jednou za hodinu
         const last = lastReminded.get(login) ?? 0;
-        if (Date.now() - last < REMINDER_COOLDOWN_MS) {
-            continue;
-        }
+        if (Date.now() - last < REMINDER_COOLDOWN_MS) continue;
 
-        // Uživatel už má zvolenou možnost
-        if (clientData.choices && userHasChoice(clientData.choices, login)) {
-            continue;
-        }
+        if (clientData.choices && userHasChoice(clientData.choices, login)) continue;
 
-        // Odešleme push notifikaci
         try {
             await webpush.sendNotification(
                 entry.subscription,
@@ -136,15 +181,21 @@ async function checkAndSendReminders(): Promise<void> {
             console.log(`Push reminder: odeslána připomínka uživateli ${login}`);
         } catch (error: any) {
             if (error.statusCode === 410 || error.statusCode === 404) {
-                // Subscription expirovala nebo je neplatná — odebereme z registry
                 console.log(`Push reminder: subscription uživatele ${login} expirovala, odebírám`);
-                delete registry[login];
-                await saveRegistry(registry);
+                expiredLogins.push(login);
             } else {
                 console.error(`Push reminder: chyba při odesílání notifikace uživateli ${login}:`, error);
             }
         }
     }
+
+    if (expiredLogins.length > 0) {
+        await storage.updateData<Registry>(REGISTRY_KEY, (current) => {
+            const r = current ?? {};
+            for (const login of expiredLogins) delete r[login];
+            return r;
+        });
+    }
 }
 
 /** Spustí scheduler pro kontrolu a odesílání připomínek každou minutu. */
@@ -160,7 +211,6 @@ export function startReminderScheduler(): void {
 
     webpush.setVapidDetails(subject, publicKey, privateKey);
 
-    // Spustíme kontrolu každou minutu
-    setInterval(checkAndSendReminders, 60_000);
-    console.log('Push reminder: scheduler spuštěn');
+    reminderInterval = setInterval(checkAndSendReminders, 60_000);
+    console.log(`Push reminder: scheduler spuštěn (POD_ID=${POD_ID})`);
 }

server/src/qr.ts

@@ -31,10 +31,10 @@ export function convertBbanToIban(bankAccountNumber: string): string {
     // Zatím napevno, nemá smysl řešit nic jiného než CZ
     iban = iban.replace('C', '12').replace('Z', '35');
     const remainder = BigInt(iban) % BigInt(97);
-    const checkDigits = BigInt(98) - remainder;
-    iban = `${COUNTRY_CODE}${checkDigits.toString()}${bankCode}${prefix}${accountNumber}`;
+    const checkDigits = (BigInt(98) - remainder).toString().padStart(2, '0');
+    iban = `${COUNTRY_CODE}${checkDigits}${bankCode}${prefix}${accountNumber}`;
     if (iban.length !== 24) {
-        throw Error("Neplatná délka sestaveného IBAN: " + iban.length + ", očekáváno 24");
+        throw new Error("Neplatná délka sestaveného IBAN: " + iban.length + ", očekáváno 24");
     }
     return iban;
 }
@@ -56,10 +56,8 @@ function createStorageKey(customerName: string, id: string): string {
  * @param id unikátní identifikátor (UUID) tohoto QR kódu
  */
 export async function generateQr(customerName: string, bankAccountNumber: string, bankAccountHolder: string, amount: number, message: string, id: string): Promise<void> {
-    // Zpráva pro příjemce nesmí dle standardu obsahovat '*' a být delší než 60 znaků
-    if (message.indexOf('*') >= 0) {
-        message = message.replace(/\*/g, '');
-    }
+    // Zpráva nesmí obsahovat '*' a znaky mimo ISO 8859-1; délka max. 60 znaků
+    message = message.replace(/[^\x00-\xff]/g, '').replace(/\*/g, '');
     if (message.length > 60) {
         message = message.substring(0, 60);
     }

server/src/routes/foodRoutes.ts

@@ -56,15 +56,15 @@ function checkRateLimit(key: string, limit: number = RATE_LIMIT): boolean {
  */
 const parseValidateFutureDayIndex = (req: Request<{}, any, AddChoiceData["body"] | UpdateNoteData["body"]>) => {
     if (req.body.dayIndex == null) {
-        throw Error(`Nebyl předán index dne v týdnu.`);
+        throw new Error(`Nebyl předán index dne v týdnu.`);
     }
     const todayDayIndex = getDayOfWeekIndex(getToday());
     const dayIndex = req.body.dayIndex;
     if (isNaN(dayIndex)) {
-        throw Error(`Neplatný index dne v týdnu: ${req.body.dayIndex}`);
+        throw new Error(`Neplatný index dne v týdnu: ${req.body.dayIndex}`);
     }
     if (dayIndex < todayDayIndex) {
-        throw Error(`Předaný index dne v týdnu (${dayIndex}) nesmí být nižší než dnešní den (${todayDayIndex})`);
+        throw new Error(`Předaný index dne v týdnu (${dayIndex}) nesmí být nižší než dnešní den (${todayDayIndex})`);
     }
     return dayIndex;
 }
@@ -72,7 +72,7 @@ const parseValidateFutureDayIndex = (req: Request<{}, any, AddChoiceData["body"]
 const parseSlot = (body: Record<string, any>): MealSlot | undefined => {
     const slot = body?.slot;
     if (slot != null && slot !== MealSlot.OBED) {
-        throw Error(`Neplatný slot: ${slot}`);
+        throw new Error(`Neplatný slot: ${slot}`);
     }
     return slot ?? undefined;
 };
@@ -153,7 +153,7 @@ router.post("/updateNote", async (req: Request<{}, any, UpdateNoteData["body"]>,
     try { slot = parseSlot(req.body); } catch (e: any) { return res.status(400).json({ error: e.message }); }
     try {
         if (note && note.length > 70) {
-            throw Error("Poznámka může mít maximálně 70 znaků");
+            throw new Error("Poznámka může mít maximálně 70 znaků");
         }
         let date = undefined;
         if (req.body.dayIndex != null) {

server/src/routes/groupRoutes.ts

@@ -69,7 +69,7 @@ router.post("/updateMember", async (req: Request, res, next) => {
     if (!targetLogin) return res.status(400).json({ error: 'Nebyl předán login uživatele' });
     const patch: Record<string, any> = {};
     if (amount !== undefined) {
-        if (typeof amount !== 'number' || !Number.isFinite(amount) || amount < 0) {
+        if (!Number.isInteger(amount) || amount < 0) {
             return res.status(400).json({ error: 'Neplatná částka' });
         }
         patch.amount = amount;
@@ -83,7 +83,7 @@ router.post("/updateMember", async (req: Request, res, next) => {
         patch.surchargeText = surchargeText;
     }
     if (surchargeAmount !== undefined) {
-        if (typeof surchargeAmount !== 'number' || !Number.isFinite(surchargeAmount) || surchargeAmount < 0) {
+        if (!Number.isInteger(surchargeAmount) || surchargeAmount < 0) {
             return res.status(400).json({ error: 'Neplatná výše příplatku' });
         }
         patch.surchargeAmount = surchargeAmount;
@@ -113,19 +113,19 @@ router.post("/updateFees", async (req: Request, res, next) => {
     const login = getLogin(parseToken(req));
     const { id, fees, shipping, tip, discountType, discountValue } = req.body ?? {};
     if (!id) return res.status(400).json({ error: 'Nebylo předáno ID skupiny' });
-    if (fees !== undefined && (typeof fees !== 'number' || !Number.isFinite(fees) || fees < 0)) {
+    if (fees !== undefined && (!Number.isInteger(fees) || fees < 0)) {
         return res.status(400).json({ error: 'Neplatná výše poplatků' });
     }
-    if (shipping !== undefined && (typeof shipping !== 'number' || !Number.isFinite(shipping) || shipping < 0)) {
+    if (shipping !== undefined && (!Number.isInteger(shipping) || shipping < 0)) {
         return res.status(400).json({ error: 'Neplatná výše dopravy' });
     }
-    if (tip !== undefined && (typeof tip !== 'number' || !Number.isFinite(tip) || tip < 0)) {
+    if (tip !== undefined && (!Number.isInteger(tip) || tip < 0)) {
         return res.status(400).json({ error: 'Neplatná výše spropitného' });
     }
     if (discountType !== undefined && discountType !== '' && !['percent', 'fixed'].includes(discountType)) {
         return res.status(400).json({ error: 'Neplatný typ slevy' });
     }
-    if (discountValue !== undefined && (typeof discountValue !== 'number' || !Number.isFinite(discountValue) || discountValue < 0)) {
+    if (discountValue !== undefined && (!Number.isInteger(discountValue) || discountValue < 0)) {
         return res.status(400).json({ error: 'Neplatná výše slevy' });
     }
     try {

server/src/routes/pizzaDayRoutes.ts

@@ -30,10 +30,10 @@ router.post("/add", async (req: Request<{}, any, AddPizzaData["body"]>, res) =>
         const salatIndex = req.body.salatIndex;
         const salaty = await getSalatList();
         if (!salaty) {
-            throw Error("Selhalo získání seznamu dostupných salátů.");
+            throw new Error("Selhalo získání seznamu dostupných salátů.");
         }
         if (!salaty[salatIndex]) {
-            throw Error("Neplatný index salátu: " + salatIndex);
+            throw new Error("Neplatný index salátu: " + salatIndex);
         }
         const data = await addSalatOrder(login, salaty[salatIndex]);
         getWebsocket().emit("message", data);
@@ -41,22 +41,22 @@ router.post("/add", async (req: Request<{}, any, AddPizzaData["body"]>, res) =>
     } else {
         // Přidání pizzy
         if (req.body?.pizzaIndex === undefined || isNaN(req.body.pizzaIndex)) {
-            throw Error("Nebyl předán index pizzy ani salátu");
+            throw new Error("Nebyl předán index pizzy ani salátu");
         }
         const pizzaIndex = req.body.pizzaIndex;
         if (req.body?.pizzaSizeIndex === undefined || isNaN(req.body.pizzaSizeIndex)) {
-            throw Error("Nebyl předán index velikosti pizzy");
+            throw new Error("Nebyl předán index velikosti pizzy");
         }
         const pizzaSizeIndex = req.body.pizzaSizeIndex;
         let pizzy = await getPizzaList();
         if (!pizzy) {
-            throw Error("Selhalo získání seznamu dostupných pizz.");
+            throw new Error("Selhalo získání seznamu dostupných pizz.");
         }
         if (!pizzy[pizzaIndex]) {
-            throw Error("Neplatný index pizzy: " + pizzaIndex);
+            throw new Error("Neplatný index pizzy: " + pizzaIndex);
         }
         if (!pizzy[pizzaIndex].sizes[pizzaSizeIndex]) {
-            throw Error("Neplatný index velikosti pizzy: " + pizzaSizeIndex);
+            throw new Error("Neplatný index velikosti pizzy: " + pizzaSizeIndex);
         }
         const data = await addPizzaOrder(login, pizzy[pizzaIndex], pizzy[pizzaIndex].sizes[pizzaSizeIndex]);
         getWebsocket().emit("message", data);
@@ -67,7 +67,7 @@ router.post("/add", async (req: Request<{}, any, AddPizzaData["body"]>, res) =>
 router.post("/remove", async (req: Request<{}, any, RemovePizzaData["body"]>, res) => {
     const login = getLogin(parseToken(req));
     if (!req.body?.pizzaOrder) {
-        throw Error("Nebyla předána objednávka");
+        throw new Error("Nebyla předána objednávka");
     }
     const data = await removePizzaOrder(login, req.body?.pizzaOrder);
     getWebsocket().emit("message", data);
@@ -106,7 +106,7 @@ router.post("/updatePizzaDayNote", async (req: Request<{}, any, UpdatePizzaDayNo
     const login = getLogin(parseToken(req));
     try {
         if (req.body.note && req.body.note.length > 70) {
-            throw Error("Poznámka může mít maximálně 70 znaků");
+            throw new Error("Poznámka může mít maximálně 70 znaků");
         }
         const data = await updatePizzaDayNote(login, req.body.note);
         getWebsocket().emit("message", data);

server/src/routes/qrRoutes.ts

@@ -3,6 +3,7 @@ import { getLogin } from "../auth";
 import { parseToken, formatDate } from "../utils";
 import { generateQr } from "../qr";
 import { addPendingQr } from "../pizza";
+import { markGroupQrGenerated } from "../groups";
 import { emitToUser } from "../websocket";
 import { GenerateQrData } from "../../../types";
 import crypto from "crypto";
@@ -36,18 +37,13 @@ router.post("/generate", async (req: Request<{}, any, GenerateQrData["body"]>, r
             if (!recipient.purpose || recipient.purpose.trim().length === 0) {
                 return res.status(400).json({ error: `Příjemce ${recipient.login} nemá vyplněný účel platby` });
             }
-            if (typeof recipient.amount !== 'number' || recipient.amount <= 0) {
+            if (!Number.isInteger(recipient.amount) || recipient.amount <= 0) {
                 return res.status(400).json({ error: `Příjemce ${recipient.login} má neplatnou částku` });
             }
-            // Validace max 2 desetinná místa
-            const amountStr = recipient.amount.toString();
-            if (amountStr.includes('.') && amountStr.split('.')[1].length > 2) {
-                return res.status(400).json({ error: `Částka pro ${recipient.login} má více než 2 desetinná místa` });
-            }
 
             // Vygenerovat QR kód
             const id = crypto.randomUUID();
-            await generateQr(recipient.login, bankAccount, bankAccountHolder, recipient.amount, recipient.purpose, id);
+            await generateQr(recipient.login, bankAccount, bankAccountHolder, recipient.amount / 100, recipient.purpose, id);
 
             // Uložit jako nevyřízený QR kód a okamžitě doručit příjemci
             const pendingQr = {
@@ -62,6 +58,10 @@ router.post("/generate", async (req: Request<{}, any, GenerateQrData["body"]>, r
             emitToUser(recipient.login, 'pendingQr', pendingQr);
         }
 
+        if (groupId) {
+            await markGroupQrGenerated(login, groupId);
+        }
+
         res.status(200).json({ success: true, count: recipients.length });
     } catch (e: any) {
         next(e);

server/src/service.ts

@@ -319,18 +319,17 @@ export async function initIfNeeded(date?: Date, slot?: MealSlot) {
  */
 export async function removeChoices(login: string, trusted: boolean, locationKey: LunchChoice, date?: Date, slot?: MealSlot) {
     const selectedDay = getDataKey(date ?? getToday(), slot);
-    let data = await getClientData(date, slot);
-    validateTrusted(data, login, trusted);
-    if (locationKey in data.choices) {
-        if (data.choices[locationKey] && login in data.choices[locationKey]) {
-            delete data.choices[locationKey][login]
-            if (Object.keys(data.choices[locationKey]).length === 0) {
-                delete data.choices[locationKey]
-            }
-            await storage.setData(selectedDay, data);
-        }
+    // Validate trusted flag against current data before atomic update
+    const snapshot = await getClientData(date, slot);
+    validateTrusted(snapshot, login, trusted);
+    return storage.updateData<ClientData>(selectedDay, (current) => {
+        const data = current ?? getEmptyData(date);
+        if (locationKey in data.choices && data.choices[locationKey] && login in data.choices[locationKey]) {
+            delete data.choices[locationKey][login];
+            if (Object.keys(data.choices[locationKey]).length === 0) delete data.choices[locationKey];
         }
         return data;
+    });
 }
 
 /**
@@ -346,18 +345,16 @@ export async function removeChoices(login: string, trusted: boolean, locationKey
  */
 export async function removeChoice(login: string, trusted: boolean, locationKey: LunchChoice, foodIndex: number, date?: Date, slot?: MealSlot) {
     const selectedDay = getDataKey(date ?? getToday(), slot);
-    let data = await getClientData(date, slot);
-    validateTrusted(data, login, trusted);
-    if (locationKey in data.choices) {
-        if (data.choices[locationKey] && login in data.choices[locationKey]) {
+    const snapshot = await getClientData(date, slot);
+    validateTrusted(snapshot, login, trusted);
+    return storage.updateData<ClientData>(selectedDay, (current) => {
+        const data = current ?? getEmptyData(date);
+        if (locationKey in data.choices && data.choices[locationKey] && login in data.choices[locationKey]) {
             const index = data.choices[locationKey][login].selectedFoods?.indexOf(foodIndex);
-            if (index != null && index > -1) {
-                data.choices[locationKey][login].selectedFoods?.splice(index, 1);
-                await storage.setData(selectedDay, data);
-            }
-        }
+            if (index != null && index > -1) data.choices[locationKey][login].selectedFoods?.splice(index, 1);
         }
         return data;
+    });
 }
 
 /**
@@ -485,13 +482,13 @@ export async function addChoice(login: string, trusted: boolean, locationKey: Lu
 async function validateFoodIndex(locationKey: LunchChoice, foodIndex?: number, date?: Date) {
     if (foodIndex != null) {
         if (typeof foodIndex !== 'number') {
-            throw Error(`Neplatný index ${foodIndex} typu ${typeof foodIndex}`);
+            throw new Error(`Neplatný index ${foodIndex} typu ${typeof foodIndex}`);
         }
         if (foodIndex < 0) {
-            throw Error(`Neplatný index ${foodIndex}`);
+            throw new Error(`Neplatný index ${foodIndex}`);
         }
         if (!Object.keys(Restaurant).includes(locationKey)) {
-            throw Error(`Neplatný index ${foodIndex} pro lokalitu ${locationKey} nepodporující indexy`);
+            throw new Error(`Neplatný index ${foodIndex} pro lokalitu ${locationKey} nepodporující indexy`);
         }
         const usedDate = date ?? getToday();
         const menu = await getRestaurantMenu(locationKey as Restaurant, usedDate);
@@ -512,18 +509,17 @@ async function validateFoodIndex(locationKey: LunchChoice, foodIndex?: number, d
 export async function updateNote(login: string, trusted: boolean, note?: string, date?: Date, slot?: MealSlot) {
     const usedDate = date ?? getToday();
     await initIfNeeded(usedDate, slot);
-    let data = await getClientData(usedDate, slot);
-    validateTrusted(data, login, trusted);
+    const snapshot = await getClientData(usedDate, slot);
+    validateTrusted(snapshot, login, trusted);
+    return storage.updateData<ClientData>(getDataKey(usedDate, slot), (current) => {
+        const data = current ?? getEmptyData(date);
         const userEntry = data.choices != null && Object.entries(data.choices).find(entry => entry[1][login] != null);
         if (userEntry) {
-        if (!note?.length) {
-            delete userEntry[1][login].note;
-        } else {
-            userEntry[1][login].note = note;
-        }
-        await storage.setData(getDataKey(usedDate, slot), data);
+            if (!note?.length) delete userEntry[1][login].note;
+            else userEntry[1][login].note = note;
         }
         return data;
+    });
 }
 
 /**
@@ -535,21 +531,18 @@ export async function updateNote(login: string, trusted: boolean, note?: string,
  */
 export async function updateDepartureTime(login: string, time?: string, date?: Date) {
     const usedDate = date ?? getToday();
-    let clientData = await getClientData(usedDate);
-    const found = Object.values(clientData.choices).find(location => login in location);
-    // TODO validace, že se jedná o restauraci
-    if (found) {
-        if (!time?.length) {
-            delete found[login].departureTime;
-        } else {
-            if (!Object.values<string>(DepartureTime).includes(time)) {
+    if (time?.length && !Object.values<string>(DepartureTime).includes(time)) {
         throw Error(`Neplatný čas odchodu ${time}`);
     }
-            found[login].departureTime = time;
+    return storage.updateData<ClientData>(getDataKey(usedDate), (current) => {
+        const data = current ?? getEmptyData(date);
+        const found = Object.values(data.choices).find(location => login in location);
+        if (found) {
+            if (!time?.length) delete found[login].departureTime;
+            else found[login].departureTime = time;
         }
-        await storage.setData(getDataKey(usedDate), clientData);
-    }
-    return clientData;
+        return data;
+    });
 }
 
 /**
@@ -560,14 +553,13 @@ export async function updateDepartureTime(login: string, time?: string, date?: D
  */
 export async function updateBuyer(login: string, slot?: MealSlot) {
     const usedDate = getToday();
-    let clientData = await getClientData(usedDate, slot);
-    const userEntry = clientData.choices?.['OBJEDNAVAM']?.[login];
-    if (!userEntry) {
-        throw new Error("Nelze nastavit objednatele pro uživatele s jinou volbou než \"Budu objednávat\"");
-    }
+    return storage.updateData<ClientData>(getDataKey(usedDate, slot), (current) => {
+        const data = current ?? getEmptyData();
+        const userEntry = data.choices?.['OBJEDNAVAM']?.[login];
+        if (!userEntry) throw new Error("Nelze nastavit objednatele pro uživatele s jinou volbou než \"Budu objednávat\"");
         userEntry.isBuyer = !(userEntry.isBuyer || false);
-    await storage.setData(getDataKey(usedDate, slot), clientData);
-    return clientData;
+        return data;
+    });
 }
 
 /**

server/src/stats.ts

@@ -22,13 +22,13 @@ export async function getStats(startDate: string, endDate: string): Promise<Week
     // Dočasná validace, aby to někdo ručně neshodil
     const daysDiff = ((end as any) - (start as any)) / (1000 * 60 * 60 * 24);
     if (daysDiff > 4) {
-        throw Error('Neplatný rozsah');
+        throw new Error('Neplatný rozsah');
     }
 
     const today = new Date();
     today.setHours(23, 59, 59, 999);
     if (end > today) {
-        throw Error('Nelze načíst statistiky pro budoucí datum');
+        throw new Error('Nelze načíst statistiky pro budoucí datum');
     }
 
     const result = [];

server/src/storage/StorageInterface.ts

@@ -1,32 +1,23 @@
 /**
  * Interface pro úložiště dat.
- * 
- * Aktuálně pouze "primitivní" has, get a set odrážející původní JSON DB.
- * Postupem času lze předělat pro efektivnější využití Redis.
  */
 export interface StorageInterface {
 
-    /**
-     * Inicializuje úložiště, pokud je potřeba (např. připojení k databázi).
-     */
     initialize?(): Promise<void>;
 
-    /**
-     * Vrátí příznak, zda existují data pro předaný klíč.
-     * @param key klíč, pro který zjišťujeme data (typicky datum)
-     */
     hasData(key: string): Promise<boolean>;
 
-    /**
-     * Vrátí veškerá data pro předaný klíč.
-     * @param key klíč, pro který vrátit data (typicky datum)
-     */
     getData<Type>(key: string): Promise<Type | undefined>;
 
-    /**
-     * Uloží data pod předaný klíč.
-     * @param key klíč, pod kterým uložit data (typicky datum)
-     * @param data data pro uložení
-     */
     setData<Type>(key: string, data: Type): Promise<void>;
+
+    /**
+     * Atomicky načte, zmutuje a uloží data pod daným klíčem.
+     * V Redis implementaci používá WATCH/MULTI/EXEC retry loop.
+     * Vrátí výslednou hodnotu po aplikaci mutátoru.
+     */
+    updateData<Type>(key: string, mutator: (current: Type | undefined) => Type): Promise<Type>;
+
+    /** Ověří dostupnost úložiště. Vrátí false pokud není dostupné. */
+    healthCheck?(): Promise<boolean>;
 }

server/src/storage/index.ts

@@ -20,7 +20,7 @@ if (!process.env.STORAGE || process.env.STORAGE?.toLowerCase() === JSON_KEY) {
 } else if (process.env.STORAGE?.toLowerCase() === MEMORY_KEY) {
     storage = new MemoryStorage();
 } else {
-    throw Error("Nepodporovaná hodnota proměnné STORAGE: " + process.env.STORAGE + ", podporované jsou 'json', 'redis' nebo 'memory'");
+    throw new Error("Nepodporovaná hodnota proměnné STORAGE: " + process.env.STORAGE + ", podporované jsou 'json', 'redis' nebo 'memory'");
 }
 
 export const storageReady: Promise<void> = storage.initialize

server/src/storage/json.ts

@@ -6,7 +6,6 @@ import * as path from 'path';
 const dbPath = path.resolve(__dirname, '../../data/db.json');
 const dbDir = path.dirname(dbPath);
 
-// Zajistěte, že adresář existuje
 if (!fs.existsSync(dbDir)) {
     fs.mkdirSync(dbDir, { recursive: true });
 }
@@ -29,4 +28,15 @@ export default class JsonStorage implements StorageInterface {
         db.set(key, data);
         return Promise.resolve();
     }
+
+    updateData<Type>(key: string, mutator: (current: Type | undefined) => Type): Promise<Type> {
+        const current = db.get(key) as Type | undefined;
+        const next = mutator(current);
+        db.set(key, next);
+        return Promise.resolve(next);
+    }
+
+    healthCheck(): Promise<boolean> {
+        return Promise.resolve(true);
+    }
 }

server/src/storage/memory.ts

@@ -24,4 +24,15 @@ export default class MemoryStorage implements StorageInterface {
         store.set(key, data);
         return Promise.resolve();
     }
+
+    updateData<Type>(key: string, mutator: (current: Type | undefined) => Type): Promise<Type> {
+        const current = store.get(key) as Type | undefined;
+        const next = mutator(current);
+        store.set(key, next);
+        return Promise.resolve(next);
+    }
+
+    healthCheck(): Promise<boolean> {
+        return Promise.resolve(true);
+    }
 }

server/src/storage/redis.ts

@@ -10,7 +10,7 @@ export default class RedisStorage implements StorageInterface {
     constructor() {
         const HOST = process.env.REDIS_HOST ?? 'localhost';
         const PORT = process.env.REDIS_PORT ?? 6379;
-        client = createClient({ url: `redis://${HOST}:${PORT}` });
+        client = createClient({ url: `redis://${HOST}:${PORT}` }) as RedisClientType;
     }
 
     async initialize() {
@@ -29,6 +29,44 @@ export default class RedisStorage implements StorageInterface {
 
     async setData<Type>(key: string, data: Type) {
         await client.json.set(key, '.', data as any);
-        await client.json.get(key);
+    }
+
+    async updateData<Type>(key: string, mutator: (current: Type | undefined) => Type): Promise<Type> {
+        // node-redis v5 nemá executeIsolated — pro WATCH/MULTI potřebujeme dedikované spojení
+        const c = client.duplicate();
+        await c.connect();
+        try {
+            for (let attempt = 0; attempt < 10; attempt++) {
+                await c.watch(key);
+                const current = await c.json.get(key, { path: '.' }) as Type | undefined;
+                const next = mutator(current);
+                const multi = c.multi();
+                multi.json.set(key, '.', next as any);
+                const result = await multi.exec();
+                if (result !== null) return next;
+            }
+            throw new Error(`updateData: optimistic lock failed after 10 retries for key: ${key}`);
+        } finally {
+            await c.disconnect();
         }
     }
+
+    async healthCheck(): Promise<boolean> {
+        try {
+            const pong = await client.ping();
+            return pong === 'PONG';
+        } catch {
+            return false;
+        }
+    }
+}
+
+/** Vrátí hlavní Redis klient — používá se pro lease připomínkovače a shutdown. */
+export function getRedisClient(): RedisClientType | undefined {
+    return client;
+}
+
+/** Zavře připojení k Redisu. Volá se při graceful shutdown. */
+export async function shutdownRedisStorage(): Promise<void> {
+    await client?.quit();
+}

server/src/tests/chefie.test.ts

@@ -31,8 +31,8 @@ test('saláty mají name a ingredients', async () => {
 
 test('cena salátu zahrnuje pevný příplatek 13 Kč za obal', async () => {
     const salaty = await downloadSalaty(false);
-    // Caesar sticker price = 129, box = 13
-    expect(salaty[0].price).toBe(129 + 13);
-    // Řecký sticker price = 119, box = 13
-    expect(salaty[1].price).toBe(119 + 13);
+    // Caesar sticker price = 129, box = 13 → (129 + 13) * 100 haléřů
+    expect(salaty[0].price).toBe((129 + 13) * 100);
+    // Řecký sticker price = 119, box = 13 → (119 + 13) * 100 haléřů
+    expect(salaty[1].price).toBe((119 + 13) * 100);
 });

server/src/tests/qrRoutes.test.ts

@@ -28,8 +28,8 @@ beforeEach(() => {
 
 const VALID_BODY = {
     recipients: [
-        { login: 'uzivatel1', purpose: 'Pizza Margherita', amount: 149 },
-        { login: 'uzivatel2', purpose: 'Pizza Diavola', amount: 179 },
+        { login: 'uzivatel1', purpose: 'Pizza Margherita', amount: 14900 },
+        { login: 'uzivatel2', purpose: 'Pizza Diavola', amount: 17900 },
     ],
     bankAccount: '19-2000145399/0800',
     bankAccountHolder: 'Jan Novák',
@@ -76,17 +76,17 @@ test('POST /generate vrátí 400 pro zápornou částku', async () => {
     expect(res.body.error).toContain('částku');
 });
 
-test('POST /generate vrátí 400 pro částku s více než 2 desetinnými místy', async () => {
+test('POST /generate vrátí 400 pro necelou částku', async () => {
     const body = {
         ...VALID_BODY,
-        recipients: [{ login: 'uzivatel1', purpose: 'Pizza', amount: 149.999 }],
+        recipients: [{ login: 'uzivatel1', purpose: 'Pizza', amount: 149.5 }],
     };
     const res = await request(buildApp())
         .post('/api/qr/generate')
         .set('Authorization', TOKEN)
         .send(body);
     expect(res.status).toBe(400);
-    expect(res.body.error).toContain('desetinná');
+    expect(res.body.error).toContain('částku');
 });
 
 test('POST /generate vrátí 400 pro příjemce bez login', async () => {

server/src/utils.ts

@@ -90,7 +90,7 @@ export const parseToken = (req: any) => {
 export const checkQueryParams = (req: any, paramNames: string[]) => {
     for (const name of paramNames) {
         if (req.query[name] == null) {
-            throw Error(`Nebyl předán parametr '${name}' v query požadavku`);
+            throw new Error(`Nebyl předán parametr '${name}' v query požadavku`);
         }
     }
 }
@@ -105,7 +105,7 @@ export const checkQueryParams = (req: any, paramNames: string[]) => {
 export const checkBodyParams = (req: any, paramNames: string[]) => {
     for (const name of paramNames) {
         if (req.body[name] == null) {
-            throw Error(`Nebyl předán parametr '${name}' v těle požadavku`);
+            throw new Error(`Nebyl předán parametr '${name}' v těle požadavku`);
         }
     }
 }

server/src/voting.ts

@@ -1,4 +1,4 @@
-import { FeatureRequest, VotingStats } from "../../types/gen/types.gen";
+import { FeatureRequest } from "../../types/gen/types.gen";
 import getStorage from "./storage";
 
 interface VotingData {
@@ -12,56 +12,28 @@ export interface VotingStatsResult {
 const storage = getStorage();
 const STORAGE_KEY = 'voting';
 
-/**
- * Vrátí pole voleb, pro které uživatel aktuálně hlasuje.
- * 
- * @param login login uživatele
- * @returns pole voleb
- */
 export async function getUserVotes(login: string) {
     const data = await storage.getData<VotingData>(STORAGE_KEY);
     return data?.[login] || [];
 }
 
-/**
- * Aktualizuje hlas uživatele pro konkrétní volbu.
- * 
- * @param login login uživatele
- * @param option volba
- * @param active příznak, zda volbu přidat nebo odebrat
- * @returns aktuální data
- */
 export async function updateFeatureVote(login: string, option: FeatureRequest, active: boolean): Promise<VotingData> {
-    let data = await storage.getData<VotingData>(STORAGE_KEY);
-    data ??= {};
-    if (!(login in data)) {
-        data[login] = [];
-    }
+    return storage.updateData<VotingData>(STORAGE_KEY, (current) => {
+        const data = current ?? {};
+        if (!(login in data)) data[login] = [];
         const index = data[login].indexOf(option);
         if (index > -1) {
-        if (active) {
-            throw Error('Pro tuto možnost jste již hlasovali');
-        } else {
+            if (active) throw Error('Pro tuto možnost jste již hlasovali');
             data[login].splice(index, 1);
-            if (data[login].length === 0) {
-                delete data[login];
-            }
-        }
+            if (data[login].length === 0) delete data[login];
         } else if (active) {
-        if (data[login].length == 4) {
-            throw Error('Je možné hlasovat pro maximálně 4 možnosti');
-        }
+            if (data[login].length === 4) throw Error('Je možné hlasovat pro maximálně 4 možnosti');
             data[login].push(option);
         }
-    await storage.setData(STORAGE_KEY, data);
         return data;
+    });
 }
 
-/**
- * Vrátí agregované statistiky hlasování - počet hlasů pro každou funkci.
- *
- * @returns objekt, kde klíčem je název funkce a hodnotou počet hlasů
- */
 export async function getVotingStats(): Promise<VotingStatsResult> {
     const data = await storage.getData<VotingData>(STORAGE_KEY);
     const stats: VotingStatsResult = {};

server/src/websocket.ts

@@ -1,12 +1,15 @@
 import { DefaultEventsMap, Server } from "socket.io";
+import { createAdapter } from "@socket.io/redis-adapter";
+import { createClient } from "redis";
 
 let io: Server<DefaultEventsMap, DefaultEventsMap, DefaultEventsMap, any>;
+let pubClient: ReturnType<typeof createClient>;
+let subClient: ReturnType<typeof createClient>;
 
 export const initWebsocket = (server: any) => {
     io = new Server(server, {
-        cors: {
-            origin: "*",
-        },
+        cors: { origin: "*" },
+        transports: ["websocket"],
     });
     io.on("connection", (socket) => {
         console.log(`New client connected: ${socket.id}`);
@@ -26,7 +29,24 @@ export const initWebsocket = (server: any) => {
         });
     });
     return io;
-}
+};
+
+/** Připojí Redis adapter pro cross-pod broadcasting. Volat až po inicializaci Redis klienta. */
+export const initRedisAdapter = async () => {
+    const HOST = process.env.REDIS_HOST ?? 'localhost';
+    const PORT = process.env.REDIS_PORT ?? 6379;
+    const url = `redis://${HOST}:${PORT}`;
+    pubClient = createClient({ url }) as ReturnType<typeof createClient>;
+    subClient = pubClient.duplicate();
+    await Promise.all([pubClient.connect(), subClient.connect()]);
+    io.adapter(createAdapter(pubClient as any, subClient as any));
+    console.log('Socket.io: Redis adapter connected');
+};
+
+/** Zavře pub/sub Redis klienty adaptéru při graceful shutdown. */
+export const shutdownWebsocketClients = async () => {
+    await Promise.allSettled([pubClient?.quit(), subClient?.quit()]);
+};
 
 export const getWebsocket = () => io;
 
@@ -34,4 +54,4 @@ export const getWebsocket = () => io;
 export const emitToUser = (login: string, event: string, data: unknown) => {
     if (!io) return;
     io.to(`user:${login}`).emit(event, data);
-}
+};

server/yarn.lock

@@ -1521,6 +1521,15 @@
   resolved "https://registry.yarnpkg.com/@socket.io/component-emitter/-/component-emitter-3.1.2.tgz#821f8442f4175d8f0467b9daf26e3a18e2d02af2"
   integrity sha512-9BCxFwvbGg/RsZK9tjXd8s4UcwR0MWeFQ1XEKIQVVvAGJyINdrqKMcTRyLoK8Rse1GjzLV9cwjWV1olXRWEXVA==
 
+"@socket.io/redis-adapter@^8.3.0":
+  version "8.3.0"
+  resolved "https://registry.yarnpkg.com/@socket.io/redis-adapter/-/redis-adapter-8.3.0.tgz#bdce1e8f34c07df4a8baf98170bf24dc84eaed4a"
+  integrity sha512-ly0cra+48hDmChxmIpnESKrc94LjRL80TEmZVscuQ/WWkRP81nNj8W8cCGMqbI4L6NCuAaPRSzZF1a9GlAxxnA==
+  dependencies:
+    debug "~4.3.1"
+    notepack.io "~3.0.1"
+    uid2 "1.0.0"
+
 "@tsconfig/node10@^1.0.7":
   version "1.0.11"
   resolved "https://registry.yarnpkg.com/@tsconfig/node10/-/node10-1.0.11.tgz#6ee46400685f130e278128c7b38b7e031ff5b2f2"
@@ -2438,6 +2447,13 @@ debug@^4.1.1:
   dependencies:
     ms "^2.1.3"
 
+debug@~4.3.1:
+  version "4.3.7"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.7.tgz#87945b4151a011d76d95a198d7111c865c360a52"
+  integrity sha512-Er2nc/H7RrMXZBFCEim6TCmMk02Z8vLC2Rbi1KEBggpo0fS6l0S1nnapwmIi3yW/+GOJap1Krg4w0Hg80oCqgQ==
+  dependencies:
+    ms "^2.1.3"
+
 dedent@^1.6.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/dedent/-/dedent-1.7.0.tgz#c1f9445335f0175a96587be245a282ff451446ca"
@@ -3844,6 +3860,11 @@ normalize-path@^3.0.0, normalize-path@~3.0.0:
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-3.0.0.tgz#0dcd69ff23a1c9b11fd0978316644a0388216a65"
   integrity sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==
 
+notepack.io@~3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/notepack.io/-/notepack.io-3.0.1.tgz#2c2c9de1bd4e64a79d34e33c413081302a0d4019"
+  integrity sha512-TKC/8zH5pXIAMVQio2TvVDTtPRX+DJPHDqjRbxogtFiByHyzKmy96RA0JtCQJ+WouyyL4A10xomQzgbUT+1jCg==
+
 npm-run-path@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-4.0.1.tgz#b7ecd1e5ed53da8e37a55e1c2269e0b97ed748ea"
@@ -4571,6 +4592,11 @@ typescript@^5.9.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
   integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
+uid2@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/uid2/-/uid2-1.0.0.tgz#ef8d95a128d7c5c44defa1a3d052eecc17a06bfb"
+  integrity sha512-+I6aJUv63YAcY9n4mQreLUt0d4lvwkkopDNmpomkAUz0fAkEMV9pRWxN0EjhW1YfRhcuyHg2v3mwddCDW1+LFQ==
+
 undefsafe@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"

types/paths/groups/updateFees.yml

@@ -14,21 +14,21 @@ post:
               description: ID skupiny
               type: string
             fees:
-              description: Poplatky (Kč)
-              type: number
+              description: Poplatky (haléře)
+              type: integer
             shipping:
-              description: Doprava (Kč)
-              type: number
+              description: Doprava (haléře)
+              type: integer
             tip:
-              description: Spropitné (Kč)
-              type: number
+              description: Spropitné (haléře)
+              type: integer
             discountType:
               description: Typ slevy
               type: string
               enum: [percent, fixed]
             discountValue:
-              description: Hodnota slevy
-              type: number
+              description: Hodnota slevy (procenta nebo haléře pro fixed)
+              type: integer
   responses:
     "200":
       $ref: "../../api.yml#/components/responses/ClientDataResponse"

types/paths/groups/updateMember.yml

@@ -18,8 +18,8 @@ post:
               description: Login člena ke změně
               type: string
             amount:
-              description: Částka k úhradě v Kč
-              type: number
+              description: Částka k úhradě v haléřích
+              type: integer
             note:
               description: Poznámka
               type: string
@@ -27,8 +27,8 @@ post:
               description: Popis příplatku
               type: string
             surchargeAmount:
-              description: Výše příplatku v Kč
-              type: number
+              description: Výše příplatku v haléřích
+              type: integer
   responses:
     "200":
       $ref: "../../api.yml#/components/responses/ClientDataResponse"

types/paths/pizzaDay/updatePizzaFee.yml

@@ -16,8 +16,8 @@ post:
               type: string
               description: Textový popis přirážky/slevy
             price:
-              type: number
-              description: Částka přirážky/slevy v Kč
+              type: integer
+              description: Částka přirážky/slevy v haléřích
   responses:
     "200":
       description: Nastavení přirážky/slevy proběhlo úspěšně.

types/schemas/_index.yml

@@ -420,14 +420,14 @@ PizzaSize:
       description: Velikost pizzy, např. "30cm"
       type: string
     pizzaPrice:
-      description: Cena samotné pizzy v Kč
-      type: number
+      description: Cena samotné pizzy v haléřích
+      type: integer
     boxPrice:
-      description: Cena krabice pizzy v Kč
-      type: number
+      description: Cena krabice pizzy v haléřích
+      type: integer
     price:
-      description: Celková cena (pizza + krabice)
-      type: number
+      description: Celková cena (pizza + krabice) v haléřích
+      type: integer
 Pizza:
   description: Údaje o konkrétní pizze.
   type: object
@@ -470,8 +470,8 @@ PizzaVariant:
       description: Velikost pizzy (např. "30cm"), nebo "1 porce" pro salát
       type: string
     price:
-      description: Cena v Kč, včetně krabice/obalu
-      type: number
+      description: Cena v haléřích, včetně krabice/obalu
+      type: integer
     category:
       description: Kategorie položky (pizza nebo salat)
       type: string
@@ -494,8 +494,8 @@ Salat:
       items:
         type: string
     price:
-      description: Cena salátu v Kč (bez obalu)
-      type: number
+      description: Cena salátu v haléřích (bez obalu)
+      type: integer
 PizzaOrder:
   description: Údaje o objednávce pizzy jednoho uživatele.
   type: object
@@ -521,11 +521,11 @@ PizzaOrder:
           description: Popis příplatku (např. "kuřecí maso navíc")
           type: string
         price:
-          description: Cena příplatku v Kč
-          type: number
+          description: Cena příplatku v haléřích
+          type: integer
     totalPrice:
-      description: Celková cena všech objednaných pizz daného uživatele, včetně krabic a příplatků
-      type: number
+      description: Celková cena všech objednaných pizz daného uživatele v haléřích, včetně krabic a příplatků
+      type: integer
     hasQr:
       description: |
         Příznak, pokud je k této objednávce vygenerován QR kód pro platbu. To je typicky pravda, pokud:
@@ -635,9 +635,9 @@ QrRecipient:
       description: Účel platby (např. "Pizza prosciutto")
       type: string
     amount:
-      description: Částka v Kč (kladné číslo, max 2 desetinná místa)
-      type: number
-      minimum: 0.01
+      description: Částka v haléřích (kladné celé číslo)
+      type: integer
+      minimum: 1
 GenerateQrRequest:
   description: Request pro generování QR kódů
   type: object
@@ -704,8 +704,8 @@ OrderGroupMember:
   additionalProperties: false
   properties:
     amount:
-      description: Částka k úhradě v Kč
-      type: number
+      description: Částka k úhradě v haléřích
+      type: integer
     note:
       description: Volitelná poznámka (např. co si objednává)
       type: string
@@ -713,8 +713,8 @@ OrderGroupMember:
       description: Popis příplatku
       type: string
     surchargeAmount:
-      description: Výše příplatku v Kč
-      type: number
+      description: Výše příplatku v haléřích
+      type: integer
     paid:
       description: Příznak, zda člen uhradil svůj podíl objednávky
       type: boolean
@@ -753,21 +753,24 @@ OrderGroup:
       description: Očekávaný čas doručení ve formátu HH:MM
       type: string
     fees:
-      description: Poplatky (balení apod.) celkem v Kč
-      type: number
+      description: Poplatky (balení apod.) celkem v haléřích
+      type: integer
     shipping:
-      description: Doprava v Kč
-      type: number
+      description: Doprava v haléřích
+      type: integer
     tip:
-      description: Spropitné v Kč
-      type: number
+      description: Spropitné v haléřích
+      type: integer
     discountType:
       description: Typ slevy aplikované na objednávku
       type: string
       enum: [percent, fixed]
     discountValue:
-      description: Hodnota slevy (procenta nebo Kč)
-      type: number
+      description: Hodnota slevy (procenta pro typ 'percent', haléře pro typ 'fixed')
+      type: integer
+    qrGenerated:
+      description: Příznak, zda byly pro skupinu vygenerovány QR kódy (blokuje opakované generování)
+      type: boolean
 
 # --- NEVYŘÍZENÉ QR KÓDY ---
 PendingQr:
@@ -790,8 +793,8 @@ PendingQr:
       description: Jméno uživatele, který QR vygeneroval (příjemce platby)
       type: string
     totalPrice:
-      description: Celková cena objednávky v Kč
-      type: number
+      description: Celková cena objednávky v haléřích
+      type: integer
     purpose:
       description: Účel platby (např. "Pizza prosciutto")
       type: string