diff --git a/.gitignore b/.gitignore
index 90dc6fd..34dc9f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 node_modules
 types/gen
-**.DS_Store
\ No newline at end of file
+**.DS_Store
+.mcp.json
+.claude/settings.local.json
+server/public/
diff --git a/.woodpecker/workflow.yaml b/.woodpecker/workflow.yaml
index bfbff41..06bad7c 100644
--- a/.woodpecker/workflow.yaml
+++ b/.woodpecker/workflow.yaml
@@ -1,10 +1,18 @@
 variables:
   - &node_image "node:22-alpine"
+  - &playwright_image "mcr.microsoft.com/playwright:v1.59.1-jammy"
   - &branch "master"
 
+# Spustit na všech větvích a pull requestech.
+# Docker build probíhá jen na master větvi (viz when: v posledních krocích).
 when:
-  - event: push
-    branch: *branch
+  - event: [push, pull_request]
+
+services:
+  redis:
+    image: redis/redis-stack-server:7.2.0-RC3
+    environment:
+      REDIS_ARGS: "--save '' --loglevel warning"
 
 steps:
   - name: Generate TypeScript types
@@ -13,33 +21,81 @@ steps:
       - cd types
       - yarn install --frozen-lockfile
       - yarn openapi-ts
+
   - name: Install server dependencies
     image: *node_image
     commands:
       - cd server
       - yarn install --frozen-lockfile
     depends_on: [Generate TypeScript types]
+
   - name: Install client dependencies
     image: *node_image
     commands:
       - cd client
       - yarn install --frozen-lockfile
     depends_on: [Generate TypeScript types]
-  - name: Build server
+
+  - name: Install e2e dependencies
+    image: *playwright_image
+    commands:
+      - cd e2e
+      - yarn install --frozen-lockfile
+    depends_on: [Generate TypeScript types]
+
+  - name: Server unit tests
+    image: *node_image
+    environment:
+      NODE_ENV: test
+      JWT_SECRET: test-secret-min-32-chars-aaaaaaa!
+      MOCK_DATA: "true"
+      STORAGE: json
+    commands:
+      - cd server
+      - yarn test
     depends_on: [Install server dependencies]
+
+  - name: Build server
     image: *node_image
     commands:
       - cd server
       - yarn build
+    depends_on: [Install server dependencies]
+
   - name: Build client
-    depends_on: [Install client dependencies]
     image: *node_image
     commands:
       - cd client
       - yarn build
+    depends_on: [Install client dependencies]
+
+  - name: Playwright E2E tests
+    image: *playwright_image
+    environment:
+      CI: "true"
+      NODE_ENV: test
+      JWT_SECRET: test-secret-min-32-chars-aaaaaaa!
+      MOCK_DATA: "true"
+      STORAGE: redis
+      REDIS_HOST: redis
+      REDIS_PORT: "6379"
+      HTTP_REMOTE_USER_ENABLED: "true"
+      HTTP_REMOTE_USER_HEADER_NAME: remote-user
+      HTTP_REMOTE_TRUSTED_IPS: "0.0.0.0/0,::/0"
+    commands:
+      # Zkopírujeme build klienta do server/public, aby Express mohl SPA servírovat
+      - cp -r client/dist server/public
+      - cd e2e
+      - yarn playwright install firefox --with-deps
+      - yarn test
+    depends_on: [Build server, Build client, Install e2e dependencies]
+
   - name: Build Docker image
     depends_on: [Build server, Build client]
     image: woodpeckerci/plugin-docker-buildx
+    when:
+      - event: push
+        branch: *branch
     settings:
       dockerfile: Dockerfile-Woodpecker
       platforms: linux/amd64
@@ -51,11 +107,14 @@ steps:
         from_secret: REPO_PASSWORD
       repo:
         from_secret: REPO_NAME
+
   - name: Discord notification - build
     image: appleboy/drone-discord
     depends_on: [Build Docker image]
     when:
       - status: [success, failure]
+        event: push
+        branch: *branch
     settings:
       webhook_id:
         from_secret: DISCORD_WEBHOOK_ID
diff --git a/e2e/.gitignore b/e2e/.gitignore
new file mode 100644
index 0000000..945fcd0
--- /dev/null
+++ b/e2e/.gitignore
@@ -0,0 +1,3 @@
+node_modules/
+playwright-report/
+test-results/
diff --git a/e2e/package.json b/e2e/package.json
new file mode 100644
index 0000000..5f1ef37
--- /dev/null
+++ b/e2e/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "@luncher/e2e",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "test": "playwright test",
+    "test:ui": "playwright test --ui",
+    "test:debug": "playwright test --debug",
+    "report": "playwright show-report"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.50.0",
+    "@types/node": "^22.0.0",
+    "typescript": "^5.9.3"
+  }
+}
diff --git a/e2e/playwright.config.ts b/e2e/playwright.config.ts
new file mode 100644
index 0000000..9301772
--- /dev/null
+++ b/e2e/playwright.config.ts
@@ -0,0 +1,60 @@
+import { defineConfig, devices } from '@playwright/test';
+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';
+
+// Server env vars injected for local runs. In CI these are set at the step level.
+const serverEnv: Record<string, string> = {
+    NODE_ENV: 'test',
+    MOCK_DATA: 'true',
+    STORAGE: process.env.STORAGE ?? 'json',
+    JWT_SECRET: process.env.JWT_SECRET ?? 'e2e-test-secret-min-32-chars-aaaa',
+    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',
+};
+if (process.env.REDIS_HOST) {
+    serverEnv.REDIS_HOST = process.env.REDIS_HOST;
+    serverEnv.REDIS_PORT = process.env.REDIS_PORT ?? '6379';
+}
+
+export default defineConfig({
+    testDir: './tests',
+    timeout: 30_000,
+    retries: process.env.CI ? 1 : 0,
+    workers: 1,
+    reporter: [['list'], ['html', { open: 'never' }]],
+    use: {
+        baseURL: BASE_URL,
+        // Default: every test authenticates as e2e-user via trusted header.
+        // Tests that need the real login form should override this in their own context.
+        extraHTTPHeaders: {
+            'remote-user': 'e2e-user',
+        },
+        trace: 'retain-on-failure',
+        video: 'retain-on-failure',
+    },
+    projects: [
+        { name: 'chromium', use: { ...devices['Desktop Chrome'] } },
+        { name: 'firefox', use: { ...devices['Desktop Firefox'] } },
+    ],
+    // Pre-built server must be started before tests. In CI the step does this
+    // explicitly. Locally: build types+server+client, cp -r client/dist server/public,
+    // then `cd e2e && yarn test` OR let webServer below do it if reuseExistingServer=true
+    // is set and the server is already running.
+    webServer: {
+        command: 'node dist/server/src/index.js',
+        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`,
+        timeout: 15_000,
+        reuseExistingServer: !process.env.CI,
+        env: serverEnv,
+        stdout: 'pipe',
+        stderr: 'pipe',
+    },
+});
diff --git a/e2e/tests/helpers.ts b/e2e/tests/helpers.ts
new file mode 100644
index 0000000..5835a83
--- /dev/null
+++ b/e2e/tests/helpers.ts
@@ -0,0 +1,21 @@
+import { Page, APIRequestContext } from '@playwright/test';
+
+/** Přihlásí uživatele přes POST /api/login a uloží JWT do localStorage. */
+export async function loginViaApi(page: Page, login: string): Promise<void> {
+    const response = await page.request.post('/api/login', {
+        headers: { 'Content-Type': 'application/json', 'remote-user': login },
+        data: {},
+    });
+    const token = await response.json() as string;
+    await page.goto('/');
+    await page.evaluate((t) => localStorage.setItem('token', t), token);
+}
+
+/** Vyčistí stav pizza dne pro zadaný dayIndex (0=pondělí…4=pátek) přes dev API. */
+export async function clearPizzaDay(request: APIRequestContext): Promise<void> {
+    const today = new Date('2025-01-10'); // MOCK_DATA pins to Friday = dayIndex 4
+    await request.post('/api/dev/clear', {
+        headers: { 'Content-Type': 'application/json', 'remote-user': 'e2e-user' },
+        data: { dayIndex: 4 },
+    });
+}
diff --git a/e2e/tests/login.spec.ts b/e2e/tests/login.spec.ts
new file mode 100644
index 0000000..0df71d0
--- /dev/null
+++ b/e2e/tests/login.spec.ts
@@ -0,0 +1,50 @@
+import { test, expect } from '@playwright/test';
+
+// Tento test záměrně NEPOUŽÍVÁ trusted-header – testuje reálný login formulář.
+test.use({ extraHTTPHeaders: {} });
+
+test('uživatel se přihlásí formulářem a uvidí obsah aplikace', async ({ page }) => {
+    // Server běží s HTTP_REMOTE_USER_ENABLED=true, takže POST /api/login vždy vyžaduje
+    // hlavičku remote-user. Zachytíme požadavky z formuláře (mají tělo s polem login)
+    // a přidáme hlavičku; požadavek auto-loginu (bez těla) projde bez hlavičky a selže,
+    // čímž formulář zůstane viditelný.
+    await page.route('**/api/login', async (route) => {
+        const body = route.request().postData();
+        let login: string | undefined;
+        try { login = body ? JSON.parse(body)?.login : undefined; } catch {}
+        await route.continue({
+            headers: login
+                ? { ...route.request().headers(), 'remote-user': login }
+                : route.request().headers(),
+        });
+    });
+
+    await page.goto('/');
+
+    // Formulář musí být viditelný – auto-login selhal (nepřišla hlavička)
+    const loginInput = page.locator('#login-input');
+    await expect(loginInput).toBeVisible({ timeout: 10_000 });
+
+    // Vyplnění loginu a odeslání Enterem
+    await loginInput.fill('testuser');
+    await loginInput.press('Enter');
+
+    // Po přihlášení musí zmizet login formulář
+    await expect(loginInput).not.toBeVisible({ timeout: 10_000 });
+
+    // JWT musí být uloženo v localStorage jako 3-dílný token
+    const token = await page.evaluate(() => localStorage.getItem('token'));
+    expect(token).toBeTruthy();
+    expect((token as string).split('.')).toHaveLength(3);
+});
+
+test('trusted-header přihlášení proběhne automaticky bez formuláře', async ({ page, context }) => {
+    // Obnoví trusted header (přepíše prázdný extraHTTPHeaders z test.use výše)
+    await context.setExtraHTTPHeaders({ 'remote-user': 'e2e-auto-user' });
+    await page.goto('/');
+
+    // Login formulář by se neměl nikdy zobrazit, nebo se ihned schová
+    await page.waitForLoadState('networkidle');
+    const loginInput = page.locator('#login-input');
+    await expect(loginInput).not.toBeVisible({ timeout: 5_000 });
+});
diff --git a/e2e/tests/pick-food.spec.ts b/e2e/tests/pick-food.spec.ts
new file mode 100644
index 0000000..090ee20
--- /dev/null
+++ b/e2e/tests/pick-food.spec.ts
@@ -0,0 +1,70 @@
+import { test, expect } from '@playwright/test';
+import { clearPizzaDay } from './helpers';
+
+test.beforeEach(async ({ page, request }) => {
+    // Vyčistíme volby dne, aby testy neovlivnily navzájem
+    await request.post('/api/dev/clear', {
+        data: { dayIndex: 4 },
+    });
+    await page.goto('/');
+    await page.waitForLoadState('networkidle');
+    // Počkáme, až se zobrazí volba stravování
+    await expect(page.locator('.choice-section select').first()).toBeVisible({ timeout: 10_000 });
+});
+
+test('výběr restaurace zobrazí seznam jídel', async ({ page }) => {
+    const locationSelect = page.locator('.choice-section select').first();
+
+    // Vybereme Sladovnickou – mock menu existuje
+    await locationSelect.selectOption('SLADOVNICKA');
+
+    // Po výběru restaurace se zobrazí druhý select s jídly
+    const foodSelect = page.locator('.choice-section select').nth(1);
+    await expect(foodSelect).toBeVisible({ timeout: 5_000 });
+
+    // Select musí obsahovat alespoň 2 možnosti (empty + ≥1 jídlo)
+    const options = foodSelect.locator('option');
+    expect(await options.count()).toBeGreaterThan(1);
+});
+
+test('výběr jídla se uloží a přetrvá po reload', async ({ page }) => {
+    const locationSelect = page.locator('.choice-section select').first();
+    await locationSelect.selectOption('SLADOVNICKA');
+
+    const foodSelect = page.locator('.choice-section select').nth(1);
+    await expect(foodSelect).toBeVisible({ timeout: 5_000 });
+
+    // Vybereme první nenulovou možnost
+    const options = await foodSelect.locator('option:not([value=""])').all();
+    if (options.length === 0) {
+        test.skip(); // Mock data nejsou dostupná pro tuto restauraci
+    }
+    const firstValue = await options[0].getAttribute('value');
+    await foodSelect.selectOption({ value: firstValue! });
+
+    // Počkáme, až se volba přenese na server
+    await page.waitForLoadState('networkidle');
+
+    // Po reload musí volba přetrvat v tabulce choices
+    await page.reload();
+    await page.waitForLoadState('networkidle');
+    const choicesTable = page.locator('.choices-table');
+    await expect(choicesTable).toBeVisible({ timeout: 5_000 });
+    await expect(choicesTable.locator('text=Sladovnická')).toBeVisible();
+});
+
+test('přepnutí na NEOBEDVAM odstraní výběr restaurace', async ({ page }) => {
+    // Nejprve zvolíme restauraci
+    const locationSelect = page.locator('.choice-section select').first();
+    await locationSelect.selectOption('SLADOVNICKA');
+    await page.waitForLoadState('networkidle');
+
+    // Přepneme na "Neobědvám"
+    await locationSelect.selectOption('NEOBEDVAM');
+    await page.waitForLoadState('networkidle');
+
+    // Tabulka choices musí zobrazovat "Neobědvám"
+    const choicesTable = page.locator('.choices-table');
+    await expect(choicesTable).toBeVisible({ timeout: 5_000 });
+    await expect(choicesTable.locator('text=Neobědvám')).toBeVisible();
+});
diff --git a/e2e/tests/pizza-day.spec.ts b/e2e/tests/pizza-day.spec.ts
new file mode 100644
index 0000000..792dd89
--- /dev/null
+++ b/e2e/tests/pizza-day.spec.ts
@@ -0,0 +1,65 @@
+import { test, expect } from '@playwright/test';
+
+// Pizza day testy musí běžet sekvenčně (sdílejí stav mock dne)
+test.describe.serial('pizza day životní cyklus', () => {
+
+    test.beforeEach(async ({ request }) => {
+        // Vyčistíme data mock dne před každým testem
+        await request.post('/api/dev/clear', { data: { dayIndex: 4 } });
+    });
+
+    test('zobrazí sekci Pizza Day bez aktivního dne', async ({ page }) => {
+        await page.goto('/');
+        await page.waitForLoadState('networkidle');
+        const pizzaSection = page.locator('.pizza-section');
+        await expect(pizzaSection).toBeVisible({ timeout: 10_000 });
+        await expect(pizzaSection.locator('text=není aktuálně založen')).toBeVisible();
+    });
+
+    test('vytvoří, uzamkne a dokončí pizza day', async ({ page }) => {
+        await page.goto('/');
+        await page.waitForLoadState('networkidle');
+
+        // --- CREATED ---
+        const createBtn = page.locator('.pizza-section button', { hasText: 'Založit Pizza day' });
+        await expect(createBtn).toBeVisible({ timeout: 10_000 });
+        await createBtn.click();
+        await page.waitForLoadState('networkidle');
+        await expect(page.locator('.pizza-section')).toContainText('spravován uživatelem', { timeout: 5_000 });
+
+        // Přidáme pizzu přes API (obejde komplex SelectSearch)
+        const token = await page.evaluate(() => localStorage.getItem('token'));
+        const addResp = await page.request.post('/api/pizza/add', {
+            headers: { 'Authorization': `Bearer ${token}`, 'Content-Type': 'application/json' },
+            data: { pizzaIndex: 0, pizzaSizeIndex: 0 },
+        });
+        expect(addResp.ok()).toBeTruthy();
+
+        // Reload – server aktualizoval data přes WebSocket, ale reload je jistější
+        await page.reload();
+        await page.waitForLoadState('networkidle');
+
+        // --- LOCK ---
+        const lockBtn = page.locator('.pizza-section button', { hasText: 'Uzamknout' });
+        await expect(lockBtn).toBeEnabled({ timeout: 5_000 });
+        await lockBtn.click();
+        await page.waitForLoadState('networkidle');
+        await expect(page.locator('.pizza-section')).toContainText('uzamčeny', { timeout: 5_000 });
+
+        // --- ORDERED ---
+        const orderBtn = page.locator('.pizza-section button', { hasText: 'Objednáno' });
+        await expect(orderBtn).toBeEnabled({ timeout: 5_000 });
+        await orderBtn.click();
+        await page.waitForLoadState('networkidle');
+        await expect(page.locator('.pizza-section')).toContainText('objednány', { timeout: 5_000 });
+
+        // --- DELIVERED ---
+        const deliverBtn = page.locator('.pizza-section button', { hasText: 'Doručeno' });
+        await expect(deliverBtn).toBeVisible({ timeout: 5_000 });
+        // window.confirm dialog − Playwright automaticky potvrdí
+        page.on('dialog', dialog => dialog.accept());
+        await deliverBtn.click();
+        await page.waitForLoadState('networkidle');
+        await expect(page.locator('.pizza-section')).toContainText('doručeny', { timeout: 5_000 });
+    });
+});
diff --git a/e2e/tests/qr.spec.ts b/e2e/tests/qr.spec.ts
new file mode 100644
index 0000000..b8a0ceb
--- /dev/null
+++ b/e2e/tests/qr.spec.ts
@@ -0,0 +1,77 @@
+import { test, expect } from '@playwright/test';
+
+test.beforeEach(async ({ page, request }) => {
+    // Naseedujeme 5 uživatelů pro dnešní den – GenerateQrModal pracuje se stávajícími choices
+    await request.post('/api/dev/generate', { data: { dayIndex: 4, count: 5 } });
+
+    // Přednastavíme bankovní účet v localStorage (SettingsContext čte z LS při inicializaci)
+    await page.goto('/');
+    await page.evaluate(() => {
+        localStorage.setItem('bank_account_number', '2400000000/2010');
+        localStorage.setItem('bank_account_holder_name', 'Test User');
+    });
+    // Reload tak, aby SettingsContext načetl nové hodnoty z localStorage
+    await page.reload();
+    await page.waitForLoadState('networkidle');
+});
+
+test('Nastavení ukládají číslo účtu a jméno do localStorage', async ({ page }) => {
+    // Otevření nastavení
+    await page.locator('#basic-nav-dropdown').click();
+    await page.locator('text=Nastavení').click();
+
+    // Modal musí být viditelný
+    await expect(page.locator('.modal-title')).toContainText('Nastavení', { timeout: 5_000 });
+
+    // Změníme číslo účtu
+    const accountInput = page.getByPlaceholder('123456-1234567890/1234');
+    await accountInput.clear();
+    await accountInput.fill('1234567890/5500');
+
+    // Změníme jméno
+    const nameInput = page.getByPlaceholder('Jan Novák');
+    await nameInput.clear();
+    await nameInput.fill('Nové Jméno');
+
+    // Uložíme
+    await page.locator('.modal-footer button', { hasText: 'Uložit' }).click();
+
+    // Ověříme v localStorage
+    const bankAccount = await page.evaluate(() => localStorage.getItem('bank_account_number'));
+    const holderName = await page.evaluate(() => localStorage.getItem('bank_account_holder_name'));
+    expect(bankAccount).toBe('1234567890/5500');
+    expect(holderName).toBe('Nové Jméno');
+});
+
+test('otevře modal Generování QR kódů pokud je nastaven účet', async ({ page }) => {
+    // Otevření dropdown menu
+    await page.locator('#basic-nav-dropdown').click();
+    await page.locator('text=Generování QR kódů').click();
+
+    // Modal se otevře
+    await expect(page.locator('.modal')).toBeVisible({ timeout: 5_000 });
+    // Modal musí obsahovat seznam uživatelů nebo prázdný stav
+    await expect(page.locator('.modal-body')).toBeVisible();
+});
+
+test('upozorní pokud není nastaven bankovní účet', async ({ page }) => {
+    // Odebereme nastavení účtu
+    await page.evaluate(() => {
+        localStorage.removeItem('bank_account_number');
+        localStorage.removeItem('bank_account_holder_name');
+    });
+    await page.reload();
+    await page.waitForLoadState('networkidle');
+
+    // Dialog místo modalu
+    page.on('dialog', async dialog => {
+        expect(dialog.message()).toContain('číslo účtu');
+        await dialog.accept();
+    });
+
+    await page.locator('#basic-nav-dropdown').click();
+    await page.locator('text=Generování QR kódů').click();
+
+    // Modal se NESMÍ otevřít
+    await expect(page.locator('.modal')).not.toBeVisible({ timeout: 3_000 });
+});
diff --git a/e2e/tests/view-menus.spec.ts b/e2e/tests/view-menus.spec.ts
new file mode 100644
index 0000000..a8f6b8e
--- /dev/null
+++ b/e2e/tests/view-menus.spec.ts
@@ -0,0 +1,39 @@
+import { test, expect } from '@playwright/test';
+
+test.beforeEach(async ({ page }) => {
+    // Trusted-header login runs automatically when Login mounts.
+    // networkidle zaručí, že fetch('/api/data') byl dokončen.
+    await page.goto('/');
+    await page.waitForLoadState('networkidle');
+});
+
+test('zobrazí mock datum 10.01.2025', async ({ page }) => {
+    // MOCK_DATA=true pins today to 2025-01-10
+    await expect(page.locator('text=10.01')).toBeVisible({ timeout: 10_000 });
+});
+
+test('zobrazí čtyři restaurační karty z mock dat', async ({ page }) => {
+    // Každá restaurace je obalena v .restaurant-card
+    const cards = page.locator('.restaurant-card');
+    await expect(cards).toHaveCount(4, { timeout: 10_000 });
+});
+
+test('zobrazí alespoň jedno jídlo v menu každé restaurace', async ({ page }) => {
+    await expect(page.locator('.restaurant-card').first()).toBeVisible({ timeout: 10_000 });
+
+    // Každá karta musí mít aspoň jeden řádek v .food-table
+    const cards = page.locator('.restaurant-card');
+    const count = await cards.count();
+    for (let i = 0; i < count; i++) {
+        const card = cards.nth(i);
+        const rows = card.locator('.food-table tr');
+        expect(await rows.count()).toBeGreaterThan(0);
+    }
+});
+
+test('zobrazí volbu stravování před menu', async ({ page }) => {
+    // Sekce .choice-section obsahuje select pro výběr stravování
+    const choiceSection = page.locator('.choice-section');
+    await expect(choiceSection).toBeVisible({ timeout: 10_000 });
+    await expect(choiceSection.locator('select').first()).toBeVisible();
+});
diff --git a/e2e/tsconfig.json b/e2e/tsconfig.json
new file mode 100644
index 0000000..9b8b996
--- /dev/null
+++ b/e2e/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "CommonJS",
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "strict": true,
+    "skipLibCheck": true
+  },
+  "include": ["**/*.ts"]
+}
diff --git a/e2e/yarn.lock b/e2e/yarn.lock
new file mode 100644
index 0000000..91d4403
--- /dev/null
+++ b/e2e/yarn.lock
@@ -0,0 +1,46 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@playwright/test@^1.50.0":
+  version "1.59.1"
+  resolved "https://registry.yarnpkg.com/@playwright/test/-/test-1.59.1.tgz#5c4d38eac84a61527af466602ae20277685a02d6"
+  integrity sha512-PG6q63nQg5c9rIi4/Z5lR5IVF7yU5MqmKaPOe0HSc0O2cX1fPi96sUQu5j7eo4gKCkB2AnNGoWt7y4/Xx3Kcqg==
+  dependencies:
+    playwright "1.59.1"
+
+"@types/node@^22.0.0":
+  version "22.19.17"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-22.19.17.tgz#09c71fb34ba2510f8ac865361b1fcb9552b8a581"
+  integrity sha512-wGdMcf+vPYM6jikpS/qhg6WiqSV/OhG+jeeHT/KlVqxYfD40iYJf9/AE1uQxVWFvU7MipKRkRv8NSHiCGgPr8Q==
+  dependencies:
+    undici-types "~6.21.0"
+
+fsevents@2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.2.tgz#8a526f78b8fdf4623b709e0b975c52c24c02fd1a"
+  integrity sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==
+
+playwright-core@1.59.1:
+  version "1.59.1"
+  resolved "https://registry.yarnpkg.com/playwright-core/-/playwright-core-1.59.1.tgz#d8a2b28bcb8f2bd08ef3df93b02ae83c813244b2"
+  integrity sha512-HBV/RJg81z5BiiZ9yPzIiClYV/QMsDCKUyogwH9p3MCP6IYjUFu/MActgYAvK0oWyV9NlwM3GLBjADyWgydVyg==
+
+playwright@1.59.1:
+  version "1.59.1"
+  resolved "https://registry.yarnpkg.com/playwright/-/playwright-1.59.1.tgz#f7b0ca61637ae25264cec370df671bbe1f368a4a"
+  integrity sha512-C8oWjPR3F81yljW9o5OxcWzfh6avkVwDD2VYdwIGqTkl+OGFISgypqzfu7dOe4QNLL2aqcWBmI3PMtLIK233lw==
+  dependencies:
+    playwright-core "1.59.1"
+  optionalDependencies:
+    fsevents "2.3.2"
+
+typescript@^5.9.3:
+  version "5.9.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
+
+undici-types@~6.21.0:
+  version "6.21.0"
+  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-6.21.0.tgz#691d00af3909be93a7faa13be61b3a5b50ef12cb"
+  integrity sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==
diff --git a/server/jest.config.js b/server/jest.config.js
new file mode 100644
index 0000000..81185ff
--- /dev/null
+++ b/server/jest.config.js
@@ -0,0 +1,5 @@
+module.exports = {
+    testEnvironment: 'node',
+    testMatch: ['<rootDir>/src/tests/**/*.test.ts'],
+    setupFiles: ['<rootDir>/src/tests/helpers/setupEnv.ts'],
+};
diff --git a/server/src/index.ts b/server/src/index.ts
index 59c2533..4fce188 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -10,6 +10,7 @@ import { getIsWeekend, InsufficientPermissions, PizzaDayConflictError, parseToke
 import { getPendingQrs } from "./pizza";
 import { initWebsocket } from "./websocket";
 import { startReminderScheduler } from "./pushReminder";
+import { storageReady } from "./storage";
 import pizzaDayRoutes from "./routes/pizzaDayRoutes";
 import foodRoutes, { refreshMetoda } from "./routes/foodRoutes";
 import votingRoutes from "./routes/votingRoutes";
@@ -56,6 +57,10 @@ if (HTTP_REMOTE_USER_ENABLED) {
 
 // ----------- Metody nevyžadující token --------------
 
+app.get("/api/health", (_req, res) => {
+    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' });
@@ -189,9 +194,11 @@ app.use((err: any, req: any, res: any, next: any) => {
 const PORT = process.env.PORT ?? 3001;
 const HOST = process.env.HOST ?? '0.0.0.0';
 
-server.listen(PORT, () => {
-    console.log(`Server listening on ${HOST}, port ${PORT}`);
-    startReminderScheduler();
+storageReady.then(() => {
+    server.listen(PORT, () => {
+        console.log(`Server listening on ${HOST}, port ${PORT}`);
+        startReminderScheduler();
+    });
 });
 
 // Umožníme vypnutí serveru přes SIGINT, jinak Docker čeká než ho sestřelí
diff --git a/server/src/mock.ts b/server/src/mock.ts
index 6620fbf..db57404 100644
--- a/server/src/mock.ts
+++ b/server/src/mock.ts
@@ -1458,26 +1458,17 @@ export const getSalatListMock = () => {
 }
 
 export const getStatsMock = (): WeeklyStats => {
+    const mkDay = (date: string, di: number) => ({
+        date,
+        locations: Object.keys(LunchChoice).reduce((prev, cur, ci) => (
+            { ...prev, [cur]: (di * 7 + ci * 3) % 10 }
+        ), {} as Record<string, number>),
+    });
     return [
-        {
-            date: '24.02.',
-            locations: { ...Object.keys(LunchChoice).reduce((prev, cur) => ({ ...prev, [cur]: Math.floor(Math.random() * 10) }), {}) }
-        },
-        {
-            date: '25.02.',
-            locations: { ...Object.keys(LunchChoice).reduce((prev, cur) => ({ ...prev, [cur]: Math.floor(Math.random() * 10) }), {}) }
-        },
-        {
-            date: '26.02.',
-            locations: { ...Object.keys(LunchChoice).reduce((prev, cur) => ({ ...prev, [cur]: Math.floor(Math.random() * 10) }), {}) }
-        },
-        {
-            date: '27.02.',
-            locations: { ...Object.keys(LunchChoice).reduce((prev, cur) => ({ ...prev, [cur]: Math.floor(Math.random() * 10) }), {}) }
-        },
-        {
-            date: '28.02.',
-            locations: { ...Object.keys(LunchChoice).reduce((prev, cur) => ({ ...prev, [cur]: Math.floor(Math.random() * 10) }), {}) }
-        }
+        mkDay('24.02.', 0),
+        mkDay('25.02.', 1),
+        mkDay('26.02.', 2),
+        mkDay('27.02.', 3),
+        mkDay('28.02.', 4),
     ];
 }
\ No newline at end of file
diff --git a/server/src/restaurants.ts b/server/src/restaurants.ts
index eeb311c..2eb0d1e 100644
--- a/server/src/restaurants.ts
+++ b/server/src/restaurants.ts
@@ -40,7 +40,7 @@ const SENKSERIKOVA_URL = 'https://www.menicka.cz/6561-pivovarsky-senk-serikova.h
  * @param text vstupní text
  * @returns true, pokud text představuje polévku
  */
-const isTextSoupName = (text: string): boolean => {
+export const isTextSoupName = (text: string): boolean => {
     for (const name of SOUP_NAMES) {
         if (text.toLowerCase().includes(name)) {
             return true;
@@ -49,11 +49,11 @@ const isTextSoupName = (text: string): boolean => {
     return false;
 }
 
-const capitalize = (word: string): string => {
+export const capitalize = (word: string): string => {
     return word.charAt(0).toUpperCase() + word.slice(1);
 }
 
-const sanitizeText = (text: string): string => {
+export const sanitizeText = (text: string): string => {
     return text.replace('\t', '').replace(' , ', ', ').trim();
 }
 
@@ -64,7 +64,7 @@ const sanitizeText = (text: string): string => {
  * @param name původní název jídla
  * @returns objekt obsahující vyčištěný název a pole alergenů
  */
-const parseAllergens = (name: string): { cleanName: string, allergens: number[] } => {
+export const parseAllergens = (name: string): { cleanName: string, allergens: number[] } => {
     // Regex pro nalezení čísel na konci řetězce oddělených čárkami a případnými mezerami
     const regex = /\s+(\d+(?:\s*,\s*\d+)*)\s*$/;
     const match = regex.exec(name);
diff --git a/server/src/routes/devRoutes.ts b/server/src/routes/devRoutes.ts
index b717b5f..631684a 100644
--- a/server/src/routes/devRoutes.ts
+++ b/server/src/routes/devRoutes.ts
@@ -42,7 +42,7 @@ const RESTAURANTS_WITH_MENU = [
  * Middleware pro kontrolu DEV režimu
  */
 function requireDevMode(req: any, res: any, next: any) {
-    if (ENVIRONMENT !== 'development') {
+    if (ENVIRONMENT !== 'development' && ENVIRONMENT !== 'test') {
         return res.status(403).json({ error: 'Tento endpoint je dostupný pouze ve vývojovém režimu' });
     }
     next();
diff --git a/server/src/service.ts b/server/src/service.ts
index 2c02c81..4774662 100644
--- a/server/src/service.ts
+++ b/server/src/service.ts
@@ -29,7 +29,7 @@ export const getDateForWeekIndex = (index: number) => {
 }
 
 /** Vrátí "prázdná" (implicitní) data pro předaný den. */
-function getEmptyData(date?: Date): ClientData {
+export function getEmptyData(date?: Date): ClientData {
     const usedDate = date || getToday();
     return {
         todayDayIndex: getDayOfWeekIndex(getToday()),
@@ -61,7 +61,7 @@ export async function getData(date?: Date): Promise<ClientData> {
  * @param date datum
  * @returns databázový klíč
  */
-function getMenuKey(date: Date) {
+export function getMenuKey(date: Date) {
     const weekNumber = getWeekNumber(date);
     return `${MENU_PREFIX}_${date.getFullYear()}_${weekNumber}`;
 }
diff --git a/server/src/storage/index.ts b/server/src/storage/index.ts
index 3ac8483..bdb31f7 100644
--- a/server/src/storage/index.ts
+++ b/server/src/storage/index.ts
@@ -19,12 +19,9 @@ if (!process.env.STORAGE || process.env.STORAGE?.toLowerCase() === JSON_KEY) {
     throw Error("Nepodporovaná hodnota proměnné STORAGE: " + process.env.STORAGE + ", podporované jsou 'json' nebo 'redis'");
 }
 
-(async () => {
-    if (storage.initialize) {
-        await storage.initialize();
-    }
-})();
-
+export const storageReady: Promise<void> = storage.initialize
+    ? storage.initialize()
+    : Promise.resolve();
 
 export default function getStorage(): StorageInterface {
     return storage;
diff --git a/server/src/storage/redis.ts b/server/src/storage/redis.ts
index f92720e..bd158c7 100644
--- a/server/src/storage/redis.ts
+++ b/server/src/storage/redis.ts
@@ -14,7 +14,7 @@ export default class RedisStorage implements StorageInterface {
     }
 
     async initialize() {
-        client.connect();
+        await client.connect();
     }
 
     async hasData(key: string) {
diff --git a/server/src/tests/auth.test.ts b/server/src/tests/auth.test.ts
new file mode 100644
index 0000000..afbea8e
--- /dev/null
+++ b/server/src/tests/auth.test.ts
@@ -0,0 +1,79 @@
+import { generateToken, verify, getLogin, getTrusted } from '../auth';
+
+const VALID_SECRET = 'test-secret-min-32-chars-aaaaaaa!';
+
+beforeEach(() => {
+    process.env.JWT_SECRET = VALID_SECRET;
+});
+
+afterEach(() => {
+    delete process.env.JWT_SECRET;
+});
+
+describe('generateToken', () => {
+    test('vrátí token pro platný login', () => {
+        const token = generateToken('alice');
+        expect(typeof token).toBe('string');
+        expect(token.length).toBeGreaterThan(0);
+    });
+
+    test('vyhodí chybu bez JWT_SECRET', () => {
+        delete process.env.JWT_SECRET;
+        expect(() => generateToken('alice')).toThrow('JWT_SECRET');
+    });
+
+    test('vyhodí chybu pro příliš krátký JWT_SECRET', () => {
+        process.env.JWT_SECRET = 'short';
+        expect(() => generateToken('alice')).toThrow('32');
+    });
+
+    test('vyhodí chybu pro prázdný login', () => {
+        expect(() => generateToken('')).toThrow('login');
+        expect(() => generateToken('   ')).toThrow('login');
+    });
+
+    test('vyhodí chybu pro chybějící login', () => {
+        expect(() => generateToken(undefined)).toThrow('login');
+    });
+});
+
+describe('verify', () => {
+    test('vrátí true pro platný token', () => {
+        const token = generateToken('alice');
+        expect(verify(token)).toBe(true);
+    });
+
+    test('vrátí false pro podvrženou signaturu', () => {
+        const token = generateToken('alice');
+        const tampered = token.slice(0, -5) + 'XXXXX';
+        expect(verify(tampered)).toBe(false);
+    });
+
+    test('vrátí false pro token podepsaný jiným secret', () => {
+        process.env.JWT_SECRET = 'other-secret-min-32-chars-bbbbb!';
+        const tokenOther = generateToken('alice');
+        process.env.JWT_SECRET = VALID_SECRET;
+        expect(verify(tokenOther)).toBe(false);
+    });
+});
+
+describe('getLogin / getTrusted', () => {
+    test('round-trip: getLogin vrátí správný login', () => {
+        const token = generateToken('bob');
+        expect(getLogin(token)).toBe('bob');
+    });
+
+    test('trusted=false je výchozí hodnota', () => {
+        const token = generateToken('alice');
+        expect(getTrusted(token)).toBe(false);
+    });
+
+    test('trusted=true je zachováno', () => {
+        const token = generateToken('alice', true);
+        expect(getTrusted(token)).toBe(true);
+    });
+
+    test('getLogin vyhodí chybu pro chybějící token', () => {
+        expect(() => getLogin(undefined)).toThrow('token');
+    });
+});
diff --git a/server/src/tests/helpers/setupEnv.ts b/server/src/tests/helpers/setupEnv.ts
new file mode 100644
index 0000000..174392a
--- /dev/null
+++ b/server/src/tests/helpers/setupEnv.ts
@@ -0,0 +1,4 @@
+process.env.NODE_ENV = 'test';
+process.env.JWT_SECRET = 'test-secret-min-32-chars-aaaaaaa!';
+process.env.MOCK_DATA = 'true';
+process.env.STORAGE = 'json';
diff --git a/server/src/tests/pizza.test.ts b/server/src/tests/pizza.test.ts
new file mode 100644
index 0000000..383833f
--- /dev/null
+++ b/server/src/tests/pizza.test.ts
@@ -0,0 +1,148 @@
+import { PizzaDayState, PizzaSize } from '../../../types/gen/types.gen';
+
+const mockStorageData = new Map<string, any>();
+jest.mock('../storage', () => ({
+    __esModule: true,
+    default: () => ({
+        hasData: async (key: string) => mockStorageData.has(key),
+        getData: async <T>(key: string) => mockStorageData.get(key) as T,
+        setData: async <T>(key: string, val: T) => void mockStorageData.set(key, val),
+    }),
+    storageReady: Promise.resolve(),
+}));
+
+jest.mock('../notifikace', () => ({ callNotifikace: jest.fn() }));
+jest.mock('../qr', () => ({ generateQr: jest.fn().mockResolvedValue(undefined) }));
+jest.mock('../chefie', () => ({
+    downloadPizzy: jest.fn().mockResolvedValue([
+        { id: 1, name: 'Margherita', variants: [{ varId: 10, size: 'střední', price: 150 }] },
+    ]),
+    downloadSalaty: jest.fn().mockResolvedValue([]),
+}));
+
+import {
+    createPizzaDay,
+    deletePizzaDay,
+    lockPizzaDay,
+    unlockPizzaDay,
+    finishPizzaOrder,
+    finishPizzaDelivery,
+    addPizzaOrder,
+    removeAllUserPizzas,
+} from '../pizza';
+
+const PIZZA: any = { id: 1, name: 'Margherita', variants: [] };
+const SIZE: PizzaSize = { varId: 10, size: 'střední', price: 150 };
+
+beforeEach(() => mockStorageData.clear());
+
+describe('createPizzaDay', () => {
+    test('vytvoří pizza day ve stavu CREATED', async () => {
+        const data = await createPizzaDay('alice');
+        expect(data.pizzaDay?.state).toBe(PizzaDayState.CREATED);
+        expect(data.pizzaDay?.creator).toBe('alice');
+    });
+
+    test('vyhodí chybu, pokud pizza day již existuje', async () => {
+        await createPizzaDay('alice');
+        await expect(createPizzaDay('alice')).rejects.toThrow('existuje');
+    });
+});
+
+describe('deletePizzaDay', () => {
+    test('smaže pizza day tvůrcem', async () => {
+        await createPizzaDay('alice');
+        const data = await deletePizzaDay('alice');
+        expect(data.pizzaDay).toBeUndefined();
+    });
+
+    test('vyhodí chybu pro jiného uživatele', async () => {
+        await createPizzaDay('alice');
+        await expect(deletePizzaDay('bob')).rejects.toThrow();
+    });
+});
+
+describe('addPizzaOrder', () => {
+    test('přidá objednávku pizzy', async () => {
+        await createPizzaDay('alice');
+        const data = await addPizzaOrder('bob', PIZZA, SIZE);
+        const bobOrder = data.pizzaDay?.orders?.find(o => o.customer === 'bob');
+        expect(bobOrder?.pizzaList?.length).toBe(1);
+        expect(bobOrder?.totalPrice).toBe(150);
+    });
+
+    test('vyhodí chybu bez aktivního pizza day', async () => {
+        await expect(addPizzaOrder('bob', PIZZA, SIZE)).rejects.toThrow('neexistuje');
+    });
+});
+
+describe('lockPizzaDay / unlockPizzaDay', () => {
+    test('tvůrce může zamknout pizza day', async () => {
+        await createPizzaDay('alice');
+        const data = await lockPizzaDay('alice');
+        expect(data.pizzaDay?.state).toBe(PizzaDayState.LOCKED);
+    });
+
+    test('jiný uživatel nemůže zamknout pizza day', async () => {
+        await createPizzaDay('alice');
+        // chybová zpráva obsahuje login volajícího (bob), nikoli tvůrce
+        await expect(lockPizzaDay('bob')).rejects.toThrow('bob');
+    });
+
+    test('zamčený pizza day lze odemknout', async () => {
+        await createPizzaDay('alice');
+        await lockPizzaDay('alice');
+        const data = await unlockPizzaDay('alice');
+        expect(data.pizzaDay?.state).toBe(PizzaDayState.CREATED);
+    });
+
+    test('nelze odemknout nezamčený pizza day', async () => {
+        await createPizzaDay('alice');
+        await expect(unlockPizzaDay('alice')).rejects.toThrow(PizzaDayState.LOCKED);
+    });
+});
+
+describe('finishPizzaOrder', () => {
+    test('přesune pizza day do stavu ORDERED', async () => {
+        await createPizzaDay('alice');
+        await lockPizzaDay('alice');
+        const data = await finishPizzaOrder('alice');
+        expect(data.pizzaDay?.state).toBe(PizzaDayState.ORDERED);
+    });
+
+    test('vyhodí chybu v nesprávném stavu (CREATED)', async () => {
+        await createPizzaDay('alice');
+        await expect(finishPizzaOrder('alice')).rejects.toThrow(PizzaDayState.LOCKED);
+    });
+});
+
+describe('finishPizzaDelivery', () => {
+    test('přesune pizza day do stavu DELIVERED', async () => {
+        await createPizzaDay('alice');
+        await lockPizzaDay('alice');
+        await finishPizzaOrder('alice');
+        const data = await finishPizzaDelivery('alice');
+        expect(data.pizzaDay?.state).toBe(PizzaDayState.DELIVERED);
+    });
+
+    test('vyhodí chybu v nesprávném stavu (LOCKED)', async () => {
+        await createPizzaDay('alice');
+        await lockPizzaDay('alice');
+        await expect(finishPizzaDelivery('alice')).rejects.toThrow(PizzaDayState.ORDERED);
+    });
+});
+
+describe('removeAllUserPizzas', () => {
+    test('odstraní objednávku uživatele', async () => {
+        await createPizzaDay('alice');
+        await addPizzaOrder('bob', PIZZA, SIZE);
+        const data = await removeAllUserPizzas('bob');
+        const bobOrder = data.pizzaDay?.orders?.find(o => o.customer === 'bob');
+        expect(bobOrder).toBeUndefined();
+    });
+
+    test('je no-op bez pizza day', async () => {
+        const data = await removeAllUserPizzas('bob');
+        expect(data.pizzaDay).toBeUndefined();
+    });
+});
diff --git a/server/src/tests/restaurants.test.ts b/server/src/tests/restaurants.test.ts
new file mode 100644
index 0000000..511941c
--- /dev/null
+++ b/server/src/tests/restaurants.test.ts
@@ -0,0 +1,106 @@
+import { isTextSoupName, capitalize, sanitizeText, parseAllergens } from '../restaurants';
+
+describe('isTextSoupName', () => {
+    test('rozpozná "polévka"', () => {
+        expect(isTextSoupName('Polévka dne')).toBe(true);
+    });
+
+    test('rozpozná "česnečka"', () => {
+        expect(isTextSoupName('Česnečka s krutony')).toBe(true);
+    });
+
+    test('rozpozná "vývar"', () => {
+        expect(isTextSoupName('Hovězí vývar s nudlemi')).toBe(true);
+    });
+
+    test('rozpozná "slepičí s " (parciální shoda pro slepičí vývar)', () => {
+        expect(isTextSoupName('Slepičí s nudlemi')).toBe(true);
+    });
+
+    test('neklasifikuje hlavní jídlo jako polévku', () => {
+        expect(isTextSoupName('Svíčková na smetaně s knedlíky')).toBe(false);
+    });
+
+    test('neklasifikuje prázdný řetězec', () => {
+        expect(isTextSoupName('')).toBe(false);
+    });
+
+    test('není case-sensitive', () => {
+        expect(isTextSoupName('POLÉVKA DNEŠKA')).toBe(true);
+    });
+});
+
+describe('capitalize', () => {
+    test('zformátuje první písmeno na velké', () => {
+        expect(capitalize('svíčková')).toBe('Svíčková');
+    });
+
+    test('nechá velká písmena beze změny', () => {
+        expect(capitalize('ABC')).toBe('ABC');
+    });
+
+    test('prázdný řetězec zůstane prázdný', () => {
+        expect(capitalize('')).toBe('');
+    });
+
+    test('jednoznakový řetězec', () => {
+        expect(capitalize('a')).toBe('A');
+    });
+});
+
+describe('sanitizeText', () => {
+    test('odstraní tabulátor (první výskyt)', () => {
+        // replace('\t', '') odstraní tab bez přidání mezery
+        expect(sanitizeText('\tKnedlíky')).toBe('Knedlíky');
+    });
+
+    test('nahradí první " , " za ", "', () => {
+        // replace(' , ', ', ') nahrazuje pouze první výskyt
+        expect(sanitizeText('Knedlíky , zelí')).toBe('Knedlíky, zelí');
+    });
+
+    test('ořízne okrajové mezery', () => {
+        expect(sanitizeText('  Jídlo  ')).toBe('Jídlo');
+    });
+
+    test('kombinace: tab + mezera okolo čárky', () => {
+        expect(sanitizeText('\tKnedlíky , zelí  ')).toBe('Knedlíky, zelí');
+    });
+});
+
+describe('parseAllergens', () => {
+    test('extrahuje alergeny na konci řetězce', () => {
+        const result = parseAllergens('Svíčková 1,3,7');
+        expect(result.cleanName).toBe('Svíčková');
+        expect(result.allergens).toEqual([1, 3, 7]);
+    });
+
+    test('toleruje mezery okolo čárek v alergenech', () => {
+        const result = parseAllergens('Řízek 1, 3, 7');
+        expect(result.allergens).toEqual([1, 3, 7]);
+    });
+
+    test('vrátí prázdná pole pro jídlo bez alergenů', () => {
+        const result = parseAllergens('Ovocný salát');
+        expect(result.cleanName).toBe('Ovocný salát');
+        expect(result.allergens).toEqual([]);
+    });
+
+    test('nesplete se s číslem uprostřed názvu', () => {
+        const result = parseAllergens('Jídlo č. 5 bez alergenů');
+        expect(result.cleanName).toBe('Jídlo č. 5 bez alergenů');
+        expect(result.allergens).toEqual([]);
+    });
+
+    test('single alergen', () => {
+        const result = parseAllergens('Houby 7');
+        expect(result.cleanName).toBe('Houby');
+        expect(result.allergens).toEqual([7]);
+    });
+
+    test('prázdný řetězec vrátí prázdné výsledky', () => {
+        const result = parseAllergens('');
+        expect(result.cleanName).toBe('');
+        expect(result.allergens).toEqual([]);
+    });
+});
diff --git a/server/src/tests/service.test.ts b/server/src/tests/service.test.ts
new file mode 100644
index 0000000..9428d51
--- /dev/null
+++ b/server/src/tests/service.test.ts
@@ -0,0 +1,78 @@
+const mockStorageData = new Map<string, any>();
+jest.mock('../storage', () => ({
+    __esModule: true,
+    default: () => ({
+        hasData: async (key: string) => mockStorageData.has(key),
+        getData: async <T>(key: string) => mockStorageData.get(key) as T,
+        setData: async <T>(key: string, val: T) => void mockStorageData.set(key, val),
+    }),
+    storageReady: Promise.resolve(),
+}));
+
+import { getDateForWeekIndex, getMenuKey, getEmptyData } from '../service';
+import { formatDate } from '../utils';
+
+// MOCK_DATA=true pins "today" to 2025-01-10 (Friday, week 2)
+// Monday of that week = 2025-01-06, ..., Friday = 2025-01-10
+
+describe('getDateForWeekIndex', () => {
+    test('index 0 (pondělí) vrátí 2025-01-06', () => {
+        expect(formatDate(getDateForWeekIndex(0))).toBe('2025-01-06');
+    });
+
+    test('index 4 (pátek) vrátí 2025-01-10', () => {
+        expect(formatDate(getDateForWeekIndex(4))).toBe('2025-01-10');
+    });
+
+    test('index 2 (středa) vrátí 2025-01-08', () => {
+        expect(formatDate(getDateForWeekIndex(2))).toBe('2025-01-08');
+    });
+
+    test('neplatný index (-1) vrátí dnešek bez vyhození chyby', () => {
+        const result = getDateForWeekIndex(-1);
+        expect(result).toBeInstanceOf(Date);
+    });
+
+    test('neplatný index (5) vrátí dnešek bez vyhození chyby', () => {
+        const result = getDateForWeekIndex(5);
+        expect(result).toBeInstanceOf(Date);
+    });
+});
+
+describe('getMenuKey', () => {
+    test('vrátí klíč ve tvaru menu_RRRR_TT', () => {
+        const date = new Date('2025-01-10');
+        const key = getMenuKey(date);
+        expect(key).toMatch(/^menu_\d{4}_\d+$/);
+    });
+
+    test('dvě data ve stejném týdnu mají stejný klíč', () => {
+        expect(getMenuKey(new Date('2025-01-06'))).toBe(getMenuKey(new Date('2025-01-10')));
+    });
+
+    test('dvě data z různých týdnů mají různé klíče', () => {
+        expect(getMenuKey(new Date('2025-01-06'))).not.toBe(getMenuKey(new Date('2025-01-13')));
+    });
+});
+
+describe('getEmptyData', () => {
+    test('vrátí strukturu s prázdnými choices', () => {
+        const data = getEmptyData(new Date('2025-01-10'));
+        expect(data.choices).toEqual({});
+    });
+
+    test('vrátí dayIndex=4 pro pátek', () => {
+        const data = getEmptyData(new Date('2025-01-10'));
+        expect(data.dayIndex).toBe(4);
+    });
+
+    test('isWeekend=false pro pracovní den', () => {
+        const data = getEmptyData(new Date('2025-01-10'));
+        expect(data.isWeekend).toBe(false);
+    });
+
+    test('isWeekend=true pro víkend', () => {
+        const data = getEmptyData(new Date('2025-01-11'));
+        expect(data.isWeekend).toBe(true);
+    });
+});
diff --git a/server/src/tests/utils.test.ts b/server/src/tests/utils.test.ts
new file mode 100644
index 0000000..b5d4846
--- /dev/null
+++ b/server/src/tests/utils.test.ts
@@ -0,0 +1,90 @@
+import { formatDate, getUsersByLocation, parseToken, checkQueryParams, checkBodyParams, getIsWeekend } from '../utils';
+
+describe('formatDate', () => {
+    const d = new Date('2025-01-10');
+
+    test('výchozí formát YYYY-MM-DD', () => {
+        expect(formatDate(d)).toBe('2025-01-10');
+    });
+
+    test('vlastní formát DD.MM.YYYY', () => {
+        expect(formatDate(d, 'DD.MM.YYYY')).toBe('10.01.2025');
+    });
+
+    test('nulové doplnění dne a měsíce', () => {
+        expect(formatDate(new Date('2025-03-05'))).toBe('2025-03-05');
+    });
+});
+
+describe('getIsWeekend', () => {
+    test('pondělí není víkend', () => {
+        expect(getIsWeekend(new Date('2025-01-06'))).toBe(false);
+    });
+    test('pátek není víkend', () => {
+        expect(getIsWeekend(new Date('2025-01-10'))).toBe(false);
+    });
+    test('sobota je víkend', () => {
+        expect(getIsWeekend(new Date('2025-01-11'))).toBe(true);
+    });
+    test('neděle je víkend', () => {
+        expect(getIsWeekend(new Date('2025-01-12'))).toBe(true);
+    });
+});
+
+describe('getUsersByLocation', () => {
+    const choices = {
+        SLADOVNICKA: { alice: { trusted: false, selectedFoods: [] } },
+        TECHTOWER: { bob: { trusted: true, selectedFoods: [] } },
+    } as any;
+
+    test('vrátí spolužáky ze stejného místa', () => {
+        expect(getUsersByLocation(choices, 'alice')).toEqual(['alice']);
+    });
+
+    test('vrátí prázdné pole pro neznámý login', () => {
+        expect(getUsersByLocation(choices, 'charlie')).toEqual([]);
+    });
+
+    test('vrátí prázdné pole pro chybějící login', () => {
+        expect(getUsersByLocation(choices, undefined)).toEqual([]);
+    });
+});
+
+describe('parseToken', () => {
+    test('vrátí token z Authorization hlavičky', () => {
+        const req = { headers: { authorization: 'Bearer mytoken' } };
+        expect(parseToken(req)).toBe('mytoken');
+    });
+
+    test('vrátí undefined pro chybějící hlavičku', () => {
+        expect(parseToken({ headers: {} })).toBeUndefined();
+    });
+
+    test('vrátí undefined pro chybějící req', () => {
+        expect(parseToken(undefined)).toBeUndefined();
+    });
+});
+
+describe('checkQueryParams', () => {
+    test('nevyhodí chybu pro přítomné parametry', () => {
+        const req = { query: { date: '2025-01-10', location: 'SLADOVNICKA' } };
+        expect(() => checkQueryParams(req, ['date', 'location'])).not.toThrow();
+    });
+
+    test('vyhodí chybu pro chybějící parametr', () => {
+        const req = { query: { date: '2025-01-10' } };
+        expect(() => checkQueryParams(req, ['date', 'location'])).toThrow("'location'");
+    });
+});
+
+describe('checkBodyParams', () => {
+    test('nevyhodí chybu pro přítomné parametry', () => {
+        const req = { body: { login: 'alice' } };
+        expect(() => checkBodyParams(req, ['login'])).not.toThrow();
+    });
+
+    test('vyhodí chybu pro chybějící parametr', () => {
+        const req = { body: {} };
+        expect(() => checkBodyParams(req, ['login'])).toThrow("'login'");
+    });
+});
diff --git a/server/src/tests/voting.test.ts b/server/src/tests/voting.test.ts
new file mode 100644
index 0000000..2c6d8ab
--- /dev/null
+++ b/server/src/tests/voting.test.ts
@@ -0,0 +1,66 @@
+import { FeatureRequest } from '../../../types/gen/types.gen';
+
+const mockStorageData = new Map<string, any>();
+jest.mock('../storage', () => ({
+    __esModule: true,
+    default: () => ({
+        hasData: async (key: string) => mockStorageData.has(key),
+        getData: async <T>(key: string) => mockStorageData.get(key) as T,
+        setData: async <T>(key: string, val: T) => void mockStorageData.set(key, val),
+    }),
+    storageReady: Promise.resolve(),
+}));
+
+import { updateFeatureVote, getVotingStats } from '../voting';
+
+beforeEach(() => mockStorageData.clear());
+
+describe('updateFeatureVote', () => {
+    const feat = 'FEATURE_A' as FeatureRequest;
+
+    test('přidá hlas pro nového uživatele', async () => {
+        const result = await updateFeatureVote('alice', feat, true);
+        expect(result['alice']).toContain(feat);
+    });
+
+    test('vyhodí chybu při duplicitním hlasování', async () => {
+        await updateFeatureVote('alice', feat, true);
+        await expect(updateFeatureVote('alice', feat, true)).rejects.toThrow('hlasovali');
+    });
+
+    test('odebere hlas', async () => {
+        await updateFeatureVote('alice', feat, true);
+        await updateFeatureVote('alice', feat, false);
+        const stats = await getVotingStats();
+        expect(stats[feat] ?? 0).toBe(0);
+    });
+
+    test('odebrání neexistujícího hlasu je no-op', async () => {
+        await expect(updateFeatureVote('alice', feat, false)).resolves.not.toThrow();
+    });
+
+    test('vyhodí chybu po 4 hlasech', async () => {
+        const features = ['FA', 'FB', 'FC', 'FD'] as FeatureRequest[];
+        for (const f of features) {
+            await updateFeatureVote('alice', f, true);
+        }
+        await expect(updateFeatureVote('alice', 'FE' as FeatureRequest, true)).rejects.toThrow('4');
+    });
+});
+
+describe('getVotingStats', () => {
+    test('vrátí agregované počty hlasů', async () => {
+        await updateFeatureVote('alice', 'FA' as FeatureRequest, true);
+        await updateFeatureVote('bob', 'FA' as FeatureRequest, true);
+        await updateFeatureVote('bob', 'FB' as FeatureRequest, true);
+
+        const stats = await getVotingStats();
+        expect(stats['FA']).toBe(2);
+        expect(stats['FB']).toBe(1);
+    });
+
+    test('vrátí prázdný objekt bez hlasů', async () => {
+        const stats = await getVotingStats();
+        expect(stats).toEqual({});
+    });
+});
diff --git a/server/tsconfig.json b/server/tsconfig.json
index 49e80bb..813b1b1 100644
--- a/server/tsconfig.json
+++ b/server/tsconfig.json
@@ -3,6 +3,9 @@
         "src/**/*",
         "../types/**/*"
     ],
+    "exclude": [
+        "src/tests/**/*"
+    ],
     "compilerOptions": {
         "target": "ES2022",
         "module": "Node16",