diff --git a/webclient/.gitignore b/webclient/.gitignore
index ed0268c3b..fc4e6b035 100644
--- a/webclient/.gitignore
+++ b/webclient/.gitignore
@@ -15,6 +15,7 @@
 
 # testing
 /coverage
+/test-results
 
 # production
 /build
diff --git a/webclient/README.md b/webclient/README.md
index 774b84ffe..4cf461f33 100644
--- a/webclient/README.md
+++ b/webclient/README.md
@@ -15,6 +15,7 @@ React 19 + TypeScript, built with [Vite](https://vite.dev/) 8. State via Redux T
 ## Prerequisites
 
 - Node.js and npm
+- Docker Desktop — only required for `npm run test:e2e` (spins up servatrice + MySQL via docker compose)
 - Run every command below from the `webclient/` directory
 
 ## Getting started
@@ -40,11 +41,18 @@ npm start
 - `npm run test:watch` — Vitest in watch mode
 - `npm run test:integration` — integration specs via `vitest.integration.config.ts`
 - `npm run test:coverage` / `npm run test:integration:coverage` — the above with v8 coverage
+- `npm run test:e2e` — full Playwright e2e pipeline (requires Docker Desktop): `test:e2e:up` → `test:e2e:run` → `test:e2e:down`, preserving the run's exit code
+- `npm run test:e2e:run` — run specs against an already-running stack (use this in dev loops)
+- `npm run test:e2e:open` — Playwright UI mode for debugging specs interactively
+- `npm run test:e2e:up` / `npm run test:e2e:down` — bring the dockerized servatrice + MySQL stack up / down (volumes are wiped on `down`)
+
+The `pretest:e2e` hook runs `playwright install --with-deps chromium` automatically on first invocation, so no manual browser install is needed.
 
 ### Quality
 
 - `npm run lint` / `npm run lint:fix` — ESLint over `src/`
-- `npm run golden` — `lint` + `test` + `test:integration`; the CI-equivalent gate to run before declaring work done
+- `npm run golden` — `lint` + `test` + `test:integration`; the fast CI-equivalent gate to run before declaring work done
+- `npm run golden:full` — `golden` + `test:e2e`; the full pre-merge gate (requires Docker Desktop)
 
 ### Codegen & i18n
 
diff --git a/webclient/e2e/docker/docker-compose.e2e.yml b/webclient/e2e/docker/docker-compose.e2e.yml
new file mode 100644
index 000000000..62c5c6f39
--- /dev/null
+++ b/webclient/e2e/docker/docker-compose.e2e.yml
@@ -0,0 +1,41 @@
+# Standalone compose used by the webclient e2e harness.
+# Paths are relative to THIS file's directory (webclient/e2e/docker/), so the
+# file must be invoked with `-f webclient/e2e/docker/docker-compose.e2e.yml`
+# from anywhere — Docker Compose resolves relative mounts / build contexts
+# against the compose file's own directory.
+services:
+  mysql:
+    image: mysql:8
+    command: --sql_mode=
+    environment:
+      MYSQL_ROOT_PASSWORD: root-password
+      MYSQL_DATABASE: servatrice
+      MYSQL_USER: servatrice
+      MYSQL_PASSWORD: password
+    volumes:
+      - ../../../servatrice/servatrice.sql:/docker-entrypoint-initdb.d/servatrice.sql:ro
+      - cockatrice_e2e_mysql:/var/lib/mysql
+
+  servatrice:
+    build:
+      # Build context is the repo root so the Dockerfile can see the full
+      # C++ source tree (three levels up from this file).
+      context: ../../..
+      dockerfile: Dockerfile
+    image: cockatrice/servatrice:e2e
+    depends_on:
+      - mysql
+    ports:
+      - "4748:4748"
+    # Wait for MySQL's TCP port to accept connections before launching
+    # servatrice. The first-time `up --build` has to load servatrice.sql, which
+    # takes longer than any fixed sleep — without this wait, servatrice exits
+    # silently with code 0 when it can't reach the DB. The trailing `sleep 2`
+    # gives mysqld a moment after the port opens to finish accepting auth.
+    # global-setup.ts additionally polls the WebSocket port to avoid races.
+    entrypoint: "/bin/bash -c 'until (echo > /dev/tcp/mysql/3306) 2>/dev/null; do sleep 1; done; sleep 2; servatrice --config /tmp/servatrice.ini --log-to-console'"
+    volumes:
+      - ./servatrice-e2e.ini:/tmp/servatrice.ini:ro
+
+volumes:
+  cockatrice_e2e_mysql:
diff --git a/webclient/e2e/docker/servatrice-e2e.ini b/webclient/e2e/docker/servatrice-e2e.ini
new file mode 100644
index 000000000..6979ef290
--- /dev/null
+++ b/webclient/e2e/docker/servatrice-e2e.ini
@@ -0,0 +1,54 @@
+; Servatrice config used only by the webclient e2e harness.
+; Mounted into the servatrice container at /tmp/servatrice.ini by
+; docker-compose.e2e.yml. Differs from servatrice-docker.ini by enabling
+; registration, skipping email activation, and relaxing per-host rate limits
+; so parallel Playwright workers from one machine don't trip them.
+
+[server]
+name="Cockatrice E2E"
+logfile=server.log
+writelog=0
+
+[authentication]
+; sql → registration + login hits the real accounts table, so the full
+; register-then-login flow is exercised end-to-end.
+method=sql
+regonly=false
+
+[users]
+; Our test usernames are "e2e_" + 6 hex chars = 10 chars. Lower the min so
+; that fits with room to spare if we ever shorten the prefix.
+minnamelength=4
+maxnamelength=12
+allowlowercase=true
+allowuppercase=true
+allownumerics=true
+allowedpunctuation=_.-
+allowpunctuationprefix=false
+disallowedwords="admin"
+minpasswordlength=6
+
+[registration]
+enabled=true
+requireemail=false
+requireemailactivation=false
+maxaccountsperemail=0
+
+[database]
+type=mysql
+prefix=cockatrice
+hostname=mysql
+database=servatrice
+user=servatrice
+password=password
+
+[security]
+trusted_sources="127.0.0.1,::1"
+enable_max_user_limit=false
+max_users_per_address=0
+max_tcp_users_per_address=0
+max_websocket_users_per_address=0
+
+[game]
+store_replays=false
+max_game_inactivity_time=120
diff --git a/webclient/e2e/global-setup.ts b/webclient/e2e/global-setup.ts
new file mode 100644
index 000000000..4cf06e08d
--- /dev/null
+++ b/webclient/e2e/global-setup.ts
@@ -0,0 +1,8 @@
+import { waitForServatriceReady } from './helpers/servatrice';
+
+export default async function globalSetup(): Promise<void> {
+  // The compose entrypoint sleeps 10s waiting for MySQL. On cold CI runs
+  // building the image on top of that can push the first WS frame well past
+  // 30s, so poll for up to 60s before giving up.
+  await waitForServatriceReady(60_000);
+}
diff --git a/webclient/e2e/helpers/seedLocalHost.ts b/webclient/e2e/helpers/seedLocalHost.ts
new file mode 100644
index 000000000..eae63d698
--- /dev/null
+++ b/webclient/e2e/helpers/seedLocalHost.ts
@@ -0,0 +1,48 @@
+import type { Page } from '@playwright/test';
+import { E2E_WS_URL } from './servatrice';
+
+// Points the running webclient at the local servatrice without touching any
+// webclient source. Strategy: navigate to the app once (which lets Dexie open
+// the Webatrice IndexedDB at schema v1 and seed DefaultHosts), then wipe the
+// `hosts` store and insert a single "Local E2E" row with lastSelected=true,
+// then reload so useKnownHosts re-reads. On a fresh Playwright context the
+// IDB is empty, so our seed is the only known host after reload — the Login
+// form auto-selects it and fires its test-connection against :4748.
+export async function seedLocalHostAndReload(page: Page, wsUrl: string = E2E_WS_URL): Promise<void> {
+  const parsed = new URL(wsUrl);
+  const host = parsed.hostname;
+  const port = parsed.port || '4748';
+
+  await page.goto('/');
+
+  await page.evaluate(async ({ host, port }) => {
+    await new Promise<void>((resolve, reject) => {
+      const open = indexedDB.open('Webatrice');
+      open.onerror = () => reject(open.error ?? new Error('failed to open Webatrice DB'));
+      open.onsuccess = () => {
+        const db = open.result;
+        if (!db.objectStoreNames.contains('hosts')) {
+          db.close();
+          reject(new Error('hosts object store missing — did Dexie finish opening?'));
+          return;
+        }
+        const tx = db.transaction('hosts', 'readwrite');
+        const store = tx.objectStore('hosts');
+        store.clear();
+        store.add({
+          name: 'Local E2E',
+          host,
+          port,
+          localHost: host,
+          localPort: port,
+          editable: false,
+          lastSelected: true,
+        });
+        tx.oncomplete = () => { db.close(); resolve(); };
+        tx.onerror = () => { db.close(); reject(tx.error ?? new Error('hosts write failed')); };
+      };
+    });
+  }, { host, port });
+
+  await page.reload();
+}
diff --git a/webclient/e2e/helpers/servatrice.ts b/webclient/e2e/helpers/servatrice.ts
new file mode 100644
index 000000000..a4dc0b895
--- /dev/null
+++ b/webclient/e2e/helpers/servatrice.ts
@@ -0,0 +1,37 @@
+import { WebSocket } from 'ws';
+
+// The e2e docker-compose.yml publishes servatrice on localhost:4748.
+export const E2E_WS_URL = 'ws://localhost:4748';
+
+// Opens a WS to servatrice and resolves once the server sends *anything* back
+// (ServerIdentification is the first frame). Used by global-setup to wait out
+// the `sleep 10` in the docker-compose entrypoint before any spec runs.
+export async function waitForServatriceReady(timeoutMs = 60_000): Promise<void> {
+  const deadline = Date.now() + timeoutMs;
+
+  while (Date.now() < deadline) {
+    const ok = await tryConnect(E2E_WS_URL).catch(() => false);
+    if (ok) {
+      return;
+    }
+    await sleep(1000);
+  }
+  throw new Error(`servatrice did not become ready at ${E2E_WS_URL} within ${timeoutMs}ms`);
+}
+
+function tryConnect(url: string): Promise<boolean> {
+  return new Promise((resolve, reject) => {
+    const ws = new WebSocket(url);
+    const done = (value: boolean, err?: Error) => {
+      try { ws.removeAllListeners(); ws.close(); } catch { /* ignore */ }
+      err ? reject(err) : resolve(value);
+    };
+    ws.once('message', () => done(true));
+    ws.once('error', (err) => done(false, err));
+    ws.once('close', () => done(false));
+  });
+}
+
+function sleep(ms: number): Promise<void> {
+  return new Promise((r) => setTimeout(r, ms));
+}
diff --git a/webclient/e2e/helpers/testUser.ts b/webclient/e2e/helpers/testUser.ts
new file mode 100644
index 000000000..3c35eebee
--- /dev/null
+++ b/webclient/e2e/helpers/testUser.ts
@@ -0,0 +1,47 @@
+import { randomBytes } from 'node:crypto';
+import { expect, type Page } from '@playwright/test';
+
+export interface TestUser {
+  userName: string;
+  password: string;
+}
+
+// Servatrice [users] rules (see webclient/e2e/docker/servatrice-e2e.ini):
+//   - 4-12 chars, lowercase/uppercase/numerics + "_.-", no leading punctuation
+//   - "admin" is blacklisted
+// "e2e_" + 6 hex chars = 10 chars — fits comfortably and is unique per call.
+export function generateUniqueUser(): TestUser {
+  return {
+    userName: 'e2e_' + randomBytes(3).toString('hex'),
+    password: 'TestPw123!',
+  };
+}
+
+export async function registerViaUi(page: Page, user: TestUser): Promise<void> {
+  await page.getByRole('button', { name: /register/i }).first().click();
+
+  const dialog = page.getByRole('dialog');
+  await expect(dialog).toBeVisible();
+
+  await dialog.locator('input[name="userName"]').fill(user.userName);
+  await dialog.locator('input[name="password"]').fill(user.password);
+  await dialog.locator('input[name="passwordConfirm"]').fill(user.password);
+
+  await dialog.getByRole('button', { name: /register/i }).click();
+
+  // With requireemailactivation=false the server returns RegistrationAccepted
+  // and the dialog closes. If activation were required an AccountActivation
+  // dialog would replace it — that's out of scope for this spec.
+  await expect(dialog).toBeHidden();
+}
+
+export async function loginViaUi(page: Page, user: TestUser): Promise<void> {
+  await page.locator('input[name="userName"]').fill(user.userName);
+  await page.locator('input[name="password"]').fill(user.password);
+
+  const loginButton = page.locator('button.loginForm-submit');
+  // The Login button is gated on a successful test-connection (fired
+  // automatically when the host loads). Wait it out rather than racing it.
+  await expect(loginButton).toBeEnabled();
+  await loginButton.click();
+}
diff --git a/webclient/e2e/playwright.config.ts b/webclient/e2e/playwright.config.ts
new file mode 100644
index 000000000..2f81593dd
--- /dev/null
+++ b/webclient/e2e/playwright.config.ts
@@ -0,0 +1,28 @@
+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './specs',
+  fullyParallel: true,
+  workers: 2,
+  timeout: 60_000,
+  expect: { timeout: 15_000 },
+  reporter: [['list'], ['html', { outputFolder: '../coverage/e2e', open: 'never' }]],
+  globalSetup: './global-setup.ts',
+  use: {
+    baseURL: 'http://localhost:5173',
+    headless: true,
+    trace: 'on-first-retry',
+    screenshot: 'only-on-failure',
+  },
+  webServer: {
+    // Run from the webclient root so Vite picks up its own vite.config.ts and
+    // `prestart` proto generation. Specs point the app at local servatrice by
+    // seeding IndexedDB via helpers/seedLocalHost.ts — no source changes needed.
+    command: 'npm run start',
+    cwd: '..',
+    url: 'http://localhost:5173',
+    reuseExistingServer: !process.env.CI,
+    timeout: 120_000,
+  },
+  projects: [{ name: 'chromium', use: { ...devices['Desktop Chrome'] } }],
+});
diff --git a/webclient/e2e/specs/register-and-login.spec.ts b/webclient/e2e/specs/register-and-login.spec.ts
new file mode 100644
index 000000000..1b72846f3
--- /dev/null
+++ b/webclient/e2e/specs/register-and-login.spec.ts
@@ -0,0 +1,19 @@
+import { test, expect } from '@playwright/test';
+import { seedLocalHostAndReload } from '../helpers/seedLocalHost';
+import { generateUniqueUser, loginViaUi, registerViaUi } from '../helpers/testUser';
+
+test('a fresh user can register, then log in against local servatrice', async ({ page }) => {
+  const user = generateUniqueUser();
+
+  // Seed IndexedDB so the Login form auto-selects our Local E2E host instead
+  // of one of the production defaults. After this returns the app has been
+  // reloaded; AppShell uses MemoryRouter, so the address bar never reflects
+  // the active route — assert on DOM markers unique to each screen instead.
+  await seedLocalHostAndReload(page);
+  await expect(page.locator('.login-content')).toBeVisible();
+
+  await registerViaUi(page, user);
+  await loginViaUi(page, user);
+
+  await expect(page.locator('.serverRoomWrapper')).toBeVisible();
+});
diff --git a/webclient/e2e/tsconfig.json b/webclient/e2e/tsconfig.json
new file mode 100644
index 000000000..ace98ba30
--- /dev/null
+++ b/webclient/e2e/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "types": ["node"],
+    "rootDir": ".",
+    "noEmit": true
+  },
+  "include": ["**/*.ts"]
+}
diff --git a/webclient/package-lock.json b/webclient/package-lock.json
index d36442220..49ce37c9e 100644
--- a/webclient/package-lock.json
+++ b/webclient/package-lock.json
@@ -42,6 +42,7 @@
         "@bufbuild/protoc-gen-es": "^2.11.0",
         "@eslint/js": "^10.0.1",
         "@mui/types": "^9.0.0",
+        "@playwright/test": "^1.51.0",
         "@testing-library/dom": "^10.4.1",
         "@testing-library/jest-dom": "^6.4.0",
         "@testing-library/react": "^16.3.2",
@@ -52,6 +53,7 @@
         "@types/react-dom": "^19.0.0",
         "@types/react-virtualized-auto-sizer": "^1.0.1",
         "@types/react-window": "^1.8.5",
+        "@types/ws": "^8.5.12",
         "@typescript-eslint/eslint-plugin": "^8.58.2",
         "@typescript-eslint/parser": "^8.58.2",
         "@vitejs/plugin-react": "^6.0.1",
@@ -68,7 +70,8 @@
         "typescript": "~6.0",
         "typescript-eslint": "^8.58.2",
         "vite": "^8.0.8",
-        "vitest": "^4.1.4"
+        "vitest": "^4.1.4",
+        "ws": "^8.18.0"
       }
     },
     "node_modules/@adobe/css-tools": {
@@ -1359,6 +1362,22 @@
         "url": "https://github.com/sponsors/Boshen"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.59.1",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.59.1.tgz",
+      "integrity": "sha512-PG6q63nQg5c9rIi4/Z5lR5IVF7yU5MqmKaPOe0HSc0O2cX1fPi96sUQu5j7eo4gKCkB2AnNGoWt7y4/Xx3Kcqg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.59.1"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@popperjs/core": {
       "version": "2.11.8",
       "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.11.8.tgz",
@@ -2159,6 +2178,16 @@
       "integrity": "sha512-zFDAD+tlpf2r4asuHEj0XH6pY6i0g5NeAHPn+15wk3BV6JA69eERFXC1gyGThDkVa1zCyKr5jox1+2LbV/AMLg==",
       "license": "MIT"
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "8.58.2",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.58.2.tgz",
@@ -5044,6 +5073,53 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "node_modules/playwright": {
+      "version": "1.59.1",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.59.1.tgz",
+      "integrity": "sha512-C8oWjPR3F81yljW9o5OxcWzfh6avkVwDD2VYdwIGqTkl+OGFISgypqzfu7dOe4QNLL2aqcWBmI3PMtLIK233lw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.59.1"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.59.1",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.59.1.tgz",
+      "integrity": "sha512-HBV/RJg81z5BiiZ9yPzIiClYV/QMsDCKUyogwH9p3MCP6IYjUFu/MActgYAvK0oWyV9NlwM3GLBjADyWgydVyg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/playwright/node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.5.10",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.10.tgz",
@@ -6154,6 +6230,28 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/ws": {
+      "version": "8.20.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.20.0.tgz",
+      "integrity": "sha512-sAt8BhgNbzCtgGbt2OxmpuryO63ZoDk/sqaB/znQm94T4fCEsy/yV+7CdC1kJhOU9lboAEU7R3kquuycDoibVA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/xml-name-validator": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
diff --git a/webclient/package.json b/webclient/package.json
index 2312f5694..c66612ed8 100644
--- a/webclient/package.json
+++ b/webclient/package.json
@@ -3,27 +3,35 @@
   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "prebuild": "npm run proto:generate && node prebuild.js",
-    "prestart": "npm run proto:generate && node prebuild.js",
     "build": "vite build",
-    "start": "vite",
-    "preview": "vite preview",
+    "diagram": "npm run diagram:simple && npm run diagram:detailed && npm run diagram:flow",
+    "diagram:simple": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/simple.mmd -o architecture/simple.png -b white -s 2",
+    "diagram:detailed": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/detailed.mmd -o architecture/detailed.png -b white -s 2",
+    "diagram:flow": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/flow.mmd -o architecture/flow.png -b white -s 2",
+    "golden": "npm run lint && npm run test && npm run test:integration",
+    "golden:coverage": "npm run lint && npm run test:coverage && npm run test:integration:coverage",
+    "golden:full": "npm run golden && npm run test:e2e",
+    "lint": "eslint src",
+    "lint:fix": "eslint src --fix",
     "test": "vitest run",
     "test:coverage": "npm run test -- --coverage",
     "test:watch": "vitest",
     "test:integration": "vitest run --config vitest.integration.config.ts",
     "test:integration:coverage": "npm run test:integration -- --coverage",
-    "lint": "eslint src",
-    "lint:fix": "eslint src --fix",
-    "golden": "npm run lint && npm run test && npm run test:integration",
-    "golden:coverage": "npm run lint && npm run test:coverage && npm run test:integration:coverage",
+    "test:e2e": "bash -c \"npm run test:e2e:up && (npm run test:e2e:run; EC=$?; npm run test:e2e:down; exit $EC)\"",
+    "test:e2e:open": "playwright test --config e2e/playwright.config.ts --ui",
+    "test:e2e:run": "playwright test --config e2e/playwright.config.ts",
+    "test:e2e:up": "docker compose -f e2e/docker/docker-compose.e2e.yml up -d --build",
+    "test:e2e:down": "docker compose -f e2e/docker/docker-compose.e2e.yml down -v",
+    "test:e2e:install-browsers": "npx playwright install --with-deps chromium",
+    "pretest:e2e": "npm run test:e2e:install-browsers",
+    "prebuild": "npm run proto:generate && node prebuild.js",
     "prepare": "cd .. && husky",
-    "translate": "node prebuild.js -i18nOnly",
+    "prestart": "npm run proto:generate && node prebuild.js",
+    "preview": "vite preview",
     "proto:generate": "npx buf generate",
-    "diagram": "npm run diagram:simple && npm run diagram:detailed && npm run diagram:flow",
-    "diagram:simple": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/simple.mmd -o architecture/simple.png -b white -s 2",
-    "diagram:detailed": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/detailed.mmd -o architecture/detailed.png -b white -s 2",
-    "diagram:flow": "npx -y -p @mermaid-js/mermaid-cli -p puppeteer mmdc -i architecture/flow.mmd -o architecture/flow.png -b white -s 2"
+    "start": "vite",
+    "translate": "node prebuild.js -i18nOnly"
   },
   "dependencies": {
     "@bufbuild/protobuf": "^2.11.0",
@@ -59,6 +67,8 @@
     "@bufbuild/buf": "^1.68.1",
     "@bufbuild/protoc-gen-es": "^2.11.0",
     "@eslint/js": "^10.0.1",
+    "@playwright/test": "^1.51.0",
+    "@types/ws": "^8.5.12",
     "@mui/types": "^9.0.0",
     "@testing-library/dom": "^10.4.1",
     "@testing-library/jest-dom": "^6.4.0",
@@ -86,7 +96,8 @@
     "typescript": "~6.0",
     "typescript-eslint": "^8.58.2",
     "vite": "^8.0.8",
-    "vitest": "^4.1.4"
+    "vitest": "^4.1.4",
+    "ws": "^8.18.0"
   },
   "browserslist": {
     "production": [