diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
new file mode 100644
index 0000000..064770e
--- /dev/null
+++ b/.github/workflows/e2e.yml
@@ -0,0 +1,53 @@
+name: e2e tests
+
+on:
+  deployment_status:
+  workflow_dispatch:
+    inputs:
+      base_url:
+        description: 'Base URL for e2e tests (e.g. https://smpl-app.vercel.app)'
+        required: true
+        type: string
+
+jobs:
+  e2e:
+    name: e2e tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    if: >
+      (github.event_name == 'deployment_status' &&
+       github.event.deployment_status.state == 'success' &&
+       github.event.deployment.environment == 'Preview') ||
+      github.event_name == 'workflow_dispatch'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm i --frozen-lockfile
+
+      - name: Install Playwright browsers
+        run: npx playwright install --with-deps chromium
+
+      - name: Run e2e tests
+        run: pnpm test:e2e
+        env:
+          BASE_URL: ${{ github.event_name == 'deployment_status' && github.event.deployment_status.target_url || inputs.base_url }}
+          VERCEL_AUTOMATION_BYPASS_SECRET: ${{ secrets.VERCEL_AUTOMATION_BYPASS_SECRET }}
+
+      - name: Upload Playwright report
+        uses: actions/upload-artifact@v4
+        if: ${{ !cancelled() }}
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 14
diff --git a/.gitignore b/.gitignore
index df2f158..be48381 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,9 @@ package-lock.json
 
 # testing
 /coverage
+/playwright-report/
+/blob-report/
+/test-results/
 
 # next.js
 /.next/
diff --git a/AGENTS.md b/AGENTS.md
index 8bbf017..2e3f2ca 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -147,7 +147,19 @@ Enum `TaskType` в Prisma генерирует TypeScript тип в `@/generated
 
 ### Тесты
 
-Для каждой функции (кроме совсем тривиальных) должны быть написаны unit-тесты. Они пишутся ишутся на vitest. Файлы тестов рядом с кодом, название *.spec.ts. Названия тестов всегда на английском, комментарии не нужны кроме неочевидных случаев. Для каждой функции свой describe, внутри несколько it с различными тесткейсами. Они должны тестировать разные вещи: не пиши несколько повторяющихся тестов.
+**Unit-тесты** — для каждой функции (кроме совсем тривиальных) должны быть написаны unit-тесты. Они пишутся на vitest. Файлы тестов рядом с кодом, название *.spec.ts. Названия тестов всегда на английском, комментарии не нужны кроме неочевидных случаев. Для каждой функции свой describe, внутри несколько it с различными тесткейсами. Они должны тестировать разные вещи: не пиши несколько повторяющихся тестов.
+
+**E2E-тесты** — написаны на Playwright, лежат в `e2e/`. Покрывают:
+- `pages.spec.ts` — загрузка страниц, отсутствие console errors
+- `api.spec.ts` — формат ответов API (tasks_info, tasks_count, progress и тд)
+- `performance.spec.ts` — таймауты API (< 3s), время загрузки страниц (< 5s), CLS (< 0.25)
+
+Запуск:
+- `pnpm test:e2e` — против локального сервера (нужен запущенный `pnpm dev`)
+- `BASE_URL=https://preview.vercel.app pnpm test:e2e` — против Vercel preview deployment
+- `pnpm test:e2e:ui` — с визуальным интерфейсом Playwright
+
+`MOCK_TELEGRAM_ID` в тестах должен совпадать с `USER_ID_MOCK` из `src/shared/constants/index.ts`.
 
 ### Работа с git
 
@@ -293,3 +305,13 @@ const user = await withDbTiming('user.findByTelegramId', () =>
 **Instrumentation** (`src/instrumentation.ts`) — серверный мониторинг. Функция `register()` выполняется при старте сервера, `onRequestError()` ловит необработанные ошибки рендеринга и роутинга.
 
 **Важно:** `@vercel/analytics`, `@vercel/speed-insights` и `web-vitals` должны быть в `dependencies` (не `devDependencies`), иначе они не попадут в production build.
+
+### Оптимизация производительности БД
+
+**DB connection warmup** — в `instrumentation.ts` при старте сервера выполняется `SELECT 1`, чтобы прогреть TCP-соединение с БД. Без этого первый запрос пользователя тратит ~1000ms на установление соединения.
+
+**Индексы на FK** — в `schema.prisma` добавлены `@@index` на все foreign key поля (`owner_id`, `workspace_id`, `project_id`, `type`). PostgreSQL не создаёт индексы на FK автоматически. После изменения индексов нужно запустить `pnpm migrate`.
+
+**Лёгкие запросы к воркспейсам** — методы `findUnique`, `findMany`, `findByUser`, `findMyWorkspace` в `prismaClient.ts` загружают только `{ type: true }` из задач вместо полных объектов. Этого достаточно для подсчёта completed/total. Если нужны полные задачи — использовать `db.task.findByWorkspace` или `db.task.findByUser`.
+
+**`findMyWorkspaceId`** — лёгкий метод, возвращающий только `{ id }` воркспейса. Используется в `/api/task?project=my`, где нужен только ID воркспейса, а не все его задачи и тиммейты.
diff --git a/MONITORING.md b/MONITORING.md
index 5d88e45..c3c57ed 100644
--- a/MONITORING.md
+++ b/MONITORING.md
@@ -185,6 +185,8 @@ Both are mounted in `src/app/layout.tsx`:
 
 ## Tests
 
+### Unit tests
+
 Logger utilities are covered by unit tests:
 
 | File | Tests | Coverage |
@@ -192,3 +194,24 @@ Logger utilities are covered by unit tests:
 | `src/shared/utils/logger/logger.spec.ts` | 9 | JSON format, log levels, context serialization |
 | `src/shared/utils/logger/withLogging.spec.ts` | 5 | Response passthrough, log levels by status, error handling, context forwarding |
 | `src/shared/utils/logger/withDbTiming.spec.ts` | 5 | Return values, timing measurement, slow query threshold, error propagation |
+
+### E2E tests (Playwright)
+
+Located in `e2e/`. Can run against local dev server or Vercel preview deployments.
+
+| File | Tests | Coverage |
+|------|-------|----------|
+| `e2e/pages.spec.ts` | 5 | Page loading (home, my-workspace, profile, workspace), console errors |
+| `e2e/api.spec.ts` | 7 | API response shapes (workspace tasks_info, project tasks_count/progress, task grouping, teammate list, error handling) |
+| `e2e/performance.spec.ts` | 5 | API response times (<3s), page load time (<5s), CLS (<0.25) |
+
+```bash
+# Run against local server (requires pnpm dev)
+pnpm test:e2e
+
+# Run against Vercel preview deployment
+BASE_URL=https://your-preview.vercel.app pnpm test:e2e
+
+# Interactive UI mode
+pnpm test:e2e:ui
+```
diff --git a/e2e/api.spec.ts b/e2e/api.spec.ts
new file mode 100644
index 0000000..f1a02fc
--- /dev/null
+++ b/e2e/api.spec.ts
@@ -0,0 +1,159 @@
+import { test, expect } from '@playwright/test';
+
+
+const MOCK_TELEGRAM_ID = '862381667';
+
+test.describe('API: /api/workspace', () => {
+    test('GET /api/workspace?userId returns workspaces with tasks_info', async ({ request }) => {
+        const response = await request.get(`/api/workspace?userId=${MOCK_TELEGRAM_ID}`);
+
+        expect(response.status()).toBe(200);
+
+        const data = await response.json();
+
+        expect(data).toHaveProperty('workspaces');
+        expect(Array.isArray(data.workspaces)).toBe(true);
+
+        if (data.workspaces.length > 0) {
+            const ws = data.workspaces[0];
+
+            expect(ws).toHaveProperty('id');
+            expect(ws).toHaveProperty('title');
+            expect(ws).toHaveProperty('tasks_info');
+            expect(ws.tasks_info).toHaveProperty('total');
+            expect(ws.tasks_info).toHaveProperty('completed');
+            expect(typeof ws.tasks_info.total).toBe('number');
+            expect(typeof ws.tasks_info.completed).toBe('number');
+            expect(ws.tasks_info.completed).toBeLessThanOrEqual(ws.tasks_info.total);
+        }
+    });
+
+    test('GET /api/workspace/my returns workspace with tasks_info', async ({ request }) => {
+        const response = await request.get(`/api/workspace/my?userId=${MOCK_TELEGRAM_ID}`);
+
+        expect(response.status()).toBe(200);
+
+        const data = await response.json();
+
+        expect(data).toHaveProperty('id');
+        expect(data).toHaveProperty('tasks_info');
+        expect(data.tasks_info).toHaveProperty('total');
+        expect(data.tasks_info).toHaveProperty('completed');
+        expect(typeof data.tasks_info.total).toBe('number');
+        expect(typeof data.tasks_info.completed).toBe('number');
+    });
+});
+
+test.describe('API: /api/project', () => {
+    test('GET /api/project?workspace returns projects with tasks_count and progress', async ({ request }) => {
+        const wsResponse = await request.get(`/api/workspace/my?userId=${MOCK_TELEGRAM_ID}`);
+        const ws = await wsResponse.json();
+
+        const response = await request.get(`/api/project?workspace=${ws.id}`);
+
+        expect(response.status()).toBe(200);
+
+        const data = await response.json();
+
+        expect(Array.isArray(data)).toBe(true);
+
+        if (data.length > 0) {
+            const project = data[0];
+
+            expect(project).toHaveProperty('id');
+            expect(project).toHaveProperty('title');
+            expect(project).toHaveProperty('tasks_count');
+            expect(project).toHaveProperty('progress');
+            expect(typeof project.tasks_count).toBe('number');
+            expect(typeof project.progress).toBe('number');
+            expect(project.progress).toBeGreaterThanOrEqual(0);
+            expect(project.progress).toBeLessThanOrEqual(100);
+        }
+    });
+});
+
+test.describe('API: /api/task', () => {
+    test('GET /api/task?project=my returns grouped tasks', async ({ request }) => {
+        const response = await request.get(
+            `/api/task?project=my&userId=${MOCK_TELEGRAM_ID}`
+        );
+
+        expect(response.status()).toBe(200);
+
+        const data = await response.json();
+
+        expect(data).toHaveProperty('workspace_id');
+        expect(data).toHaveProperty('todo');
+        expect(data).toHaveProperty('progress');
+        expect(data).toHaveProperty('review');
+        expect(data).toHaveProperty('done');
+        expect(Array.isArray(data.todo)).toBe(true);
+        expect(Array.isArray(data.progress)).toBe(true);
+        expect(Array.isArray(data.review)).toBe(true);
+        expect(Array.isArray(data.done)).toBe(true);
+    });
+
+    test('task objects have required fields', async ({ request }) => {
+        const response = await request.get(
+            `/api/task?project=my&userId=${MOCK_TELEGRAM_ID}`
+        );
+        const data = await response.json();
+
+        const allTasks = [
+            ...data.todo,
+            ...data.progress,
+            ...data.review,
+            ...data.done,
+        ];
+
+        if (allTasks.length > 0) {
+            const task = allTasks[0];
+
+            expect(task).toHaveProperty('id');
+            expect(task).toHaveProperty('title');
+            expect(task).toHaveProperty('type');
+            expect(task).toHaveProperty('date');
+            expect(task).toHaveProperty('serial');
+        }
+    });
+});
+
+test.describe('API: /api/teammate', () => {
+    test('GET /api/teammate/:workspaceId returns teammates', async ({ request }) => {
+        const wsResponse = await request.get(`/api/workspace?userId=${MOCK_TELEGRAM_ID}`);
+        const wsData = await wsResponse.json();
+
+        if (wsData.workspaces?.length > 0) {
+            const workspaceId = wsData.workspaces[0].id;
+            const response = await request.get(`/api/teammate/${workspaceId}`);
+
+            expect(response.status()).toBe(200);
+
+            const data = await response.json();
+
+            expect(data).toHaveProperty('workspaceId');
+            expect(data).toHaveProperty('teammates');
+            expect(Array.isArray(data.teammates)).toBe(true);
+        }
+    });
+});
+
+test.describe('API: error handling', () => {
+    test('GET /api/workspace/my without userId returns 400', async ({ request }) => {
+        const response = await request.get('/api/workspace/my');
+
+        expect(response.status()).toBe(400);
+    });
+
+    test('GET /api/workspace/999999 returns 404', async ({ request }) => {
+        const response = await request.get('/api/workspace/999999');
+
+        expect(response.status()).toBe(404);
+    });
+
+    test('GET /api/task?project=my without userId returns valid response', async ({ request }) => {
+        const response = await request.get('/api/task?project=my');
+
+        expect(response.ok()).toBe(true);
+    });
+});
diff --git a/e2e/pages.spec.ts b/e2e/pages.spec.ts
new file mode 100644
index 0000000..3b38e6a
--- /dev/null
+++ b/e2e/pages.spec.ts
@@ -0,0 +1,53 @@
+import { test, expect } from '@playwright/test';
+
+
+test.describe('Page loading', () => {
+    test('homepage loads and redirects', async ({ page }) => {
+        const response = await page.goto('/');
+
+        expect(response?.status()).toBeLessThan(400);
+    });
+
+    test('my-workspace page loads', async ({ page }) => {
+        const response = await page.goto('/my-workspace');
+
+        expect(response?.status()).toBeLessThan(400);
+        await expect(page).toHaveURL(/my-workspace/);
+    });
+
+    test('profile page loads', async ({ page }) => {
+        const response = await page.goto('/profile');
+
+        expect(response?.status()).toBeLessThan(400);
+    });
+
+    test('workspace page loads', async ({ page }) => {
+        const workspaces = await page.request.get('/api/workspace');
+        const data = await workspaces.json();
+
+        if (Array.isArray(data) && data.length > 0) {
+            const response = await page.goto(`/workspace/${data[0].id}`);
+
+            expect(response?.status()).toBeLessThan(400);
+        }
+    });
+
+    test('no console errors on my-workspace', async ({ page }) => {
+        const errors: string[] = [];
+
+        page.on('console', (msg) => {
+            if (msg.type() === 'error') {
+                errors.push(msg.text());
+            }
+        });
+
+        await page.goto('/my-workspace');
+        await page.waitForTimeout(2000);
+
+        const criticalErrors = errors.filter(
+            (e) => !e.includes('favicon') && !e.includes('hydration')
+        );
+
+        expect(criticalErrors).toHaveLength(0);
+    });
+});
diff --git a/e2e/performance.spec.ts b/e2e/performance.spec.ts
new file mode 100644
index 0000000..ae0858c
--- /dev/null
+++ b/e2e/performance.spec.ts
@@ -0,0 +1,90 @@
+import { test, expect } from '@playwright/test';
+
+
+const MOCK_TELEGRAM_ID = '862381667';
+const API_TIMEOUT_MS = 3000;
+
+test.describe('API performance', () => {
+    test('GET /api/workspace responds within timeout', async ({ request }) => {
+        const start = Date.now();
+        const response = await request.get(`/api/workspace?userId=${MOCK_TELEGRAM_ID}`);
+        const duration = Date.now() - start;
+
+        expect(response.status()).toBe(200);
+        expect(duration).toBeLessThan(API_TIMEOUT_MS);
+    });
+
+    test('GET /api/workspace/my responds within timeout', async ({ request }) => {
+        const start = Date.now();
+        const response = await request.get(`/api/workspace/my?userId=${MOCK_TELEGRAM_ID}`);
+        const duration = Date.now() - start;
+
+        expect(response.status()).toBe(200);
+        expect(duration).toBeLessThan(API_TIMEOUT_MS);
+    });
+
+    test('GET /api/task?project=my responds within timeout', async ({ request }) => {
+        const start = Date.now();
+        const response = await request.get(
+            `/api/task?project=my&userId=${MOCK_TELEGRAM_ID}`
+        );
+        const duration = Date.now() - start;
+
+        expect(response.status()).toBe(200);
+        expect(duration).toBeLessThan(API_TIMEOUT_MS);
+    });
+
+    test('GET /api/project responds within timeout', async ({ request }) => {
+        const wsResponse = await request.get(`/api/workspace/my?userId=${MOCK_TELEGRAM_ID}`);
+        const ws = await wsResponse.json();
+
+        const start = Date.now();
+        const response = await request.get(`/api/project?workspace=${ws.id}`);
+        const duration = Date.now() - start;
+
+        expect(response.status()).toBe(200);
+        expect(duration).toBeLessThan(API_TIMEOUT_MS);
+    });
+});
+
+test.describe('Page performance', () => {
+    test('my-workspace page loads within 5 seconds', async ({ page }) => {
+        const start = Date.now();
+
+        await page.goto('/my-workspace');
+        await page.waitForLoadState('networkidle');
+
+        const duration = Date.now() - start;
+
+        expect(duration).toBeLessThan(5000);
+    });
+
+    test('no layout shifts on my-workspace (CLS check)', async ({ page }) => {
+        await page.goto('/my-workspace');
+        await page.waitForLoadState('networkidle');
+
+        const cls = await page.evaluate(() => {
+            return new Promise<number>((resolve) => {
+                let clsValue = 0;
+                const observer = new PerformanceObserver((list) => {
+                    for (const entry of list.getEntries()) {
+                        // @ts-expect-error LayoutShift API
+                        if (!entry.hadRecentInput) {
+                            // @ts-expect-error LayoutShift API
+                            clsValue += entry.value;
+                        }
+                    }
+                });
+
+                observer.observe({ type: 'layout-shift', buffered: true });
+
+                setTimeout(() => {
+                    observer.disconnect();
+                    resolve(clsValue);
+                }, 3000);
+            });
+        });
+
+        expect(cls).toBeLessThan(0.25);
+    });
+});
diff --git a/package.json b/package.json
index 0de68e8..f04f843 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,8 @@
     "build": "prisma generate && next build",
     "start": "next start",
     "test": "vitest run",
+    "test:e2e": "playwright test",
+    "test:e2e:ui": "playwright test --ui",
     "migrate:deploy": "prisma migrate deploy",
     "lint": "eslint src",
     "stylelint": "stylelint \"**/*.scss\"",
@@ -39,6 +41,7 @@
     "@commitlint/cli": "^20.3.1",
     "@commitlint/config-conventional": "^20.3.1",
     "@eslint/eslintrc": "^3",
+    "@playwright/test": "^1.58.2",
     "@svgr/webpack": "^8.1.0",
     "@types/node": "^20",
     "@types/pg": "^8.16.0",
diff --git a/playwright.config.ts b/playwright.config.ts
new file mode 100644
index 0000000..6e64c55
--- /dev/null
+++ b/playwright.config.ts
@@ -0,0 +1,28 @@
+import { defineConfig } from '@playwright/test';
+
+
+const bypassSecret = process.env.VERCEL_AUTOMATION_BYPASS_SECRET;
+
+export default defineConfig({
+    testDir: './e2e',
+    fullyParallel: true,
+    forbidOnly: !!process.env.CI,
+    retries: process.env.CI ? 2 : 0,
+    workers: process.env.CI ? 1 : undefined,
+    reporter: 'html',
+    use: {
+        baseURL: process.env.BASE_URL || 'http://localhost:3000',
+        trace: 'on-first-retry',
+        ...(bypassSecret && {
+            extraHTTPHeaders: {
+                'x-vercel-protection-bypass': bypassSecret,
+            },
+        }),
+    },
+    projects: [
+        {
+            name: 'chromium',
+            use: { browserName: 'chromium' },
+        },
+    ],
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 969894f..f6c6ab2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -19,13 +19,13 @@ importers:
         version: 7.3.0
       '@vercel/analytics':
         specifier: ^1.6.1
-        version: 1.6.1(next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)
+        version: 1.6.1(next@16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)
       '@vercel/speed-insights':
         specifier: ^1.3.1
-        version: 1.3.1(next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)
+        version: 1.3.1(next@16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)
       next:
         specifier: ^16.1.5
-        version: 16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
+        version: 16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
       next-rspack:
         specifier: ^16.1.6
         version: 16.1.6(@swc/helpers@0.5.15)
@@ -54,6 +54,9 @@ importers:
       '@eslint/eslintrc':
         specifier: ^3
         version: 3.3.3
+      '@playwright/test':
+        specifier: ^1.58.2
+        version: 1.58.2
       '@svgr/webpack':
         specifier: ^8.1.0
         version: 8.1.0(typescript@5.9.3)
@@ -1479,6 +1482,11 @@ packages:
     resolution: {integrity: sha512-tmmZ3lQxAe/k/+rNnXQRawJ4NjxO2hqiOLTHvWchtGZULp4RyFeh6aU4XdOYBFe2KE1oShQTv4AblOs2iOrNnQ==}
     engines: {node: '>= 10.0.0'}
 
+  '@playwright/test@1.58.2':
+    resolution: {integrity: sha512-akea+6bHYBBfA9uQqSYmlJXn61cTa+jbO87xVLCWbTqbWadRVmhxlXATaOjOgcBaWU4ePo0wB41KMFv3o35IXA==}
+    engines: {node: '>=18'}
+    hasBin: true
+
   '@prisma/adapter-pg@7.3.0':
     resolution: {integrity: sha512-iuYQMbIPO6i9O45Fv8TB7vWu00BXhCaNAShenqF7gLExGDbnGp5BfFB4yz1K59zQ59jF6tQ9YHrg0P6/J3OoLg==}
 
@@ -2854,6 +2862,11 @@ packages:
     resolution: {integrity: sha512-8RipRLol37bNs2bhoV67fiTEvdTrbMUYcFTiy3+wuuOnUog2QBHCZWXDRijWQfAkhBj2Uf5UnVaiWwA5vdd82w==}
     engines: {node: '>= 6'}
 
+  fsevents@2.3.2:
+    resolution: {integrity: sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==}
+    engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
+    os: [darwin]
+
   fsevents@2.3.3:
     resolution: {integrity: sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==}
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
@@ -3623,6 +3636,16 @@ packages:
   pkg-types@2.3.0:
     resolution: {integrity: sha512-SIqCzDRg0s9npO5XQ3tNZioRY1uK06lA41ynBC1YmFTmnY6FjUjVt6s4LoADmwoig1qqD0oK8h1p/8mlMx8Oig==}
 
+  playwright-core@1.58.2:
+    resolution: {integrity: sha512-yZkEtftgwS8CsfYo7nm0KE8jsvm6i/PTgVtB8DL726wNf6H2IMsDuxCpJj59KDaxCtSnrWan2AeDqM7JBaultg==}
+    engines: {node: '>=18'}
+    hasBin: true
+
+  playwright@1.58.2:
+    resolution: {integrity: sha512-vA30H8Nvkq/cPBnNw4Q8TWz1EJyqgpuinBcHET0YVJVFldr8JDNiU9LaWAE1KqSkRYazuaBhTpB5ZzShOezQ6A==}
+    engines: {node: '>=18'}
+    hasBin: true
+
   possible-typed-array-names@1.1.0:
     resolution: {integrity: sha512-/+5VFTchJDoVj3bhoqi6UeymcD00DAwb1nJwamzPvHEszJ4FpF6SNNbUbOS8yI56qHzdV8eK0qEfOSiodkTdxg==}
     engines: {node: '>= 0.4'}
@@ -5843,6 +5866,10 @@ snapshots:
       '@parcel/watcher-win32-x64': 2.5.6
     optional: true
 
+  '@playwright/test@1.58.2':
+    dependencies:
+      playwright: 1.58.2
+
   '@prisma/adapter-pg@7.3.0':
     dependencies:
       '@prisma/driver-adapter-utils': 7.3.0
@@ -6355,14 +6382,14 @@ snapshots:
   '@unrs/resolver-binding-win32-x64-msvc@1.11.1':
     optional: true
 
-  '@vercel/analytics@1.6.1(next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)':
+  '@vercel/analytics@1.6.1(next@16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)':
     optionalDependencies:
-      next: 16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
+      next: 16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
       react: 19.2.4
 
-  '@vercel/speed-insights@1.3.1(next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)':
+  '@vercel/speed-insights@1.3.1(next@16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3))(react@19.2.4)':
     optionalDependencies:
-      next: 16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
+      next: 16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3)
       react: 19.2.4
 
   '@vitest/expect@4.0.18':
@@ -7369,6 +7396,9 @@ snapshots:
       hasown: 2.0.2
       mime-types: 2.1.35
 
+  fsevents@2.3.2:
+    optional: true
+
   fsevents@2.3.3:
     optional: true
 
@@ -7927,7 +7957,7 @@ snapshots:
     transitivePeerDependencies:
       - '@swc/helpers'
 
-  next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3):
+  next@16.1.6(@babel/core@7.28.6)(@playwright/test@1.58.2)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(sass@1.97.3):
     dependencies:
       '@next/env': 16.1.6
       '@swc/helpers': 0.5.15
@@ -7946,6 +7976,7 @@ snapshots:
       '@next/swc-linux-x64-musl': 16.1.6
       '@next/swc-win32-arm64-msvc': 16.1.6
       '@next/swc-win32-x64-msvc': 16.1.6
+      '@playwright/test': 1.58.2
       sass: 1.97.3
       sharp: 0.34.5
     transitivePeerDependencies:
@@ -8129,6 +8160,14 @@ snapshots:
       exsolve: 1.0.8
       pathe: 2.0.3
 
+  playwright-core@1.58.2: {}
+
+  playwright@1.58.2:
+    dependencies:
+      playwright-core: 1.58.2
+    optionalDependencies:
+      fsevents: 2.3.2
+
   possible-typed-array-names@1.1.0: {}
 
   postcss-media-query-parser@0.2.3: {}
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 3a82d2c..14ad070 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -35,6 +35,9 @@ model Workspace {
     projects        Project[]
     tasks           Task[]
     teammates       UserWorkspace[]
+
+    @@index([owner_id])
+    @@index([owner_id, is_my_workspace])
 }
 
 model UserWorkspace {
@@ -45,6 +48,7 @@ model UserWorkspace {
     workspace    Workspace @relation(fields: [workspace_id], references: [id])
 
     @@unique([user_id, workspace_id])
+    @@index([workspace_id])
 }
 
 model Project {
@@ -56,6 +60,8 @@ model Project {
     alias        String
     workspace    Workspace @relation(fields: [workspace_id], references: [id])
     tasks        Task[]
+
+    @@index([workspace_id])
 }
 
 model Task {
@@ -71,4 +77,8 @@ model Task {
     serial       String
     workspace    Workspace  @relation(fields: [workspace_id], references: [id])
     project      Project?   @relation(fields: [project_id], references: [id])
+
+    @@index([workspace_id])
+    @@index([project_id])
+    @@index([type])
 }
diff --git a/src/app/api/task/route.ts b/src/app/api/task/route.ts
index 0454d0d..099251d 100644
--- a/src/app/api/task/route.ts
+++ b/src/app/api/task/route.ts
@@ -130,8 +130,8 @@ export const GET = withLogging(async (req: NextRequest) => {
                 );
             }
 
-            const myWorkspace = await withDbTiming('workspace.findMyWorkspace', () =>
-                db.workspace.findMyWorkspace(user.id)
+            const myWorkspace = await withDbTiming('workspace.findMyWorkspaceId', () =>
+                db.workspace.findMyWorkspaceId(user.id)
             );
 
             if (!myWorkspace) {
diff --git a/src/instrumentation.ts b/src/instrumentation.ts
index 9c77482..28b6986 100644
--- a/src/instrumentation.ts
+++ b/src/instrumentation.ts
@@ -1,11 +1,38 @@
 export async function register() {
     if (process.env.NEXT_RUNTIME === 'nodejs') {
-        const { loggerInfoCtx } = await import('@/shared/utils/logger/logger');
+        const { loggerInfoCtx, loggerWarnCtx } = await import('@/shared/utils/logger/logger');
+        const { Pool } = await import('pg');
 
         loggerInfoCtx(
             { runtime: 'nodejs', node_version: process.version },
             'Instrumentation registered'
         );
+
+        const connectionString = process.env.DATABASE_URL;
+
+        if (connectionString) {
+            const start = performance.now();
+            const pool = new Pool({ connectionString });
+
+            try {
+                await pool.query('SELECT 1');
+                const duration = Math.round(performance.now() - start);
+
+                loggerInfoCtx(
+                    { duration_ms: duration },
+                    'DB connection warmup completed'
+                );
+            } catch (error) {
+                const duration = Math.round(performance.now() - start);
+
+                loggerWarnCtx(
+                    { duration_ms: duration, error: String(error) },
+                    'DB connection warmup failed'
+                );
+            } finally {
+                await pool.end();
+            }
+        }
     }
 }
 
diff --git a/src/shared/utils/prisma/prismaClient.ts b/src/shared/utils/prisma/prismaClient.ts
index 6d6e12d..0de21c4 100644
--- a/src/shared/utils/prisma/prismaClient.ts
+++ b/src/shared/utils/prisma/prismaClient.ts
@@ -45,7 +45,7 @@ export const db = {
             return prisma.workspace.findUnique({
                 where: { id },
                 include: {
-                    tasks: true,
+                    tasks: { select: { type: true } },
                     teammates: { select: { user_id: true } },
                 },
             });
@@ -54,7 +54,7 @@ export const db = {
         findMany: async () => {
             return prisma.workspace.findMany({
                 include: {
-                    tasks: true,
+                    tasks: { select: { type: true } },
                     teammates: { select: { user_id: true } },
                 },
             });
@@ -69,7 +69,7 @@ export const db = {
                     ],
                 },
                 include: {
-                    tasks: true,
+                    tasks: { select: { type: true } },
                     teammates: { select: { user_id: true } },
                 },
             });
@@ -82,12 +82,22 @@ export const db = {
                     is_my_workspace: true,
                 },
                 include: {
-                    tasks: true,
+                    tasks: { select: { type: true } },
                     teammates: { select: { user_id: true } },
                 },
             });
         },
 
+        findMyWorkspaceId: async (userId: number) => {
+            return prisma.workspace.findFirst({
+                where: {
+                    owner_id: userId,
+                    is_my_workspace: true,
+                },
+                select: { id: true },
+            });
+        },
+
         create: async (data: {
             title: string;
             description?: string | null;
@@ -133,20 +143,20 @@ export const db = {
         findUnique: async (id: number) => {
             return prisma.project.findUnique({
                 where: { id },
-                include: { tasks: true },
+                include: { tasks: { select: { type: true } } },
             });
         },
 
         findMany: async () => {
             return prisma.project.findMany({
-                include: { tasks: true },
+                include: { tasks: { select: { type: true } } },
             });
         },
 
         findByWorkspace: async (workspaceId: number) => {
             return prisma.project.findMany({
                 where: { workspace_id: workspaceId },
-                include: { tasks: true },
+                include: { tasks: { select: { type: true } } },
             });
         },
 
diff --git a/vitest.config.ts b/vitest.config.ts
index cb5e801..c8cf765 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -3,7 +3,8 @@ import path from 'node:path';
 
 export default defineConfig({
     test: {
-        environment: 'jsdom'
+        environment: 'jsdom',
+        exclude: ['e2e/**', 'node_modules/**'],
     },
     resolve: {
         alias: {