feat: implement Save & Taste flow in CameraCapture

tests/e2e/auth.test.ts

@@ -0,0 +1,15 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Authentication', () => {
+    test('should show error on invalid login', async ({ page }) => {
+        await page.goto('/');
+
+        await page.getByPlaceholder('name@beispiel.de').fill('wrong@example.com');
+        await page.getByPlaceholder('••••••••').fill('wrongpassword');
+        await page.getByRole('button', { name: 'Einloggen' }).click();
+
+        // Expect error message
+        // Note: This content depends on Supabase error message
+        await expect(page.locator('div:has-text("Invalid login credentials")')).toBeVisible();
+    });
+});

tests/e2e/collection.test.ts

@@ -0,0 +1,22 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Collection View', () => {
+    test('should show empty state message if no bottles found', async ({ page }) => {
+        // This test assumes a clean or specific state. 
+        // In a real environment, we'd use a test user with 0 bottles.
+        await page.goto('/');
+
+        // If we can't control the user, we at least check that we don't see the technical error message
+        const errorBox = page.locator('text=Hoppla');
+        await expect(errorBox).not.toBeVisible();
+
+        // Check for either the grid or the empty state message
+        const emptyMessage = page.locator('text=Noch keine Flaschen im Vault');
+        const bottleGrid = page.locator('.grid');
+
+        const isGridVisible = await bottleGrid.isVisible();
+        if (!isGridVisible) {
+            await expect(emptyMessage).toBeVisible();
+        }
+    });
+});

tests/e2e/landing.test.ts

@@ -0,0 +1,12 @@
+import { test, expect } from '@playwright/test';
+
+test('has title and login form', async ({ page }) => {
+    await page.goto('/');
+
+    // Expect a title "to contain" a substring.
+    await expect(page.locator('h1')).toContainText('WHISKYVAULT');
+
+    // Expect login form to be visible
+    await expect(page.getByPlaceholder('name@beispiel.de')).toBeVisible();
+    await expect(page.getByRole('button', { name: 'Einloggen' })).toBeVisible();
+});