test(ui): add E2E tests document for user sign-up flow

- Documented test case details including flow steps, expected results, and key verification points.
- Enhanced existing sign-up test specifications to include relevant tags for better categorization and tracking.

ui/tests/sign-up/sign-up.md

@@ -0,0 +1,41 @@
+### E2E Tests: User Sign-Up
+
+**Suite ID:** `SIGNUP-E2E`
+**Feature:** New user registration flow.
+
+---
+
+## Test Case: `SIGNUP-E2E-001` - Successful new user registration and login
+
+**Priority:** `critical`
+
+**Tags:**
+- type → @e2e
+- feature → @signup
+
+**Description/Objetive:** Registers a new user with valid data, verifies redirect to Login (OSS), and confirms the user can authenticate.
+
+**Preconditions:**
+- Application is running, email domain & password is acceptable for sign-up.
+- No existing data in Prowler is required; the test can run on a clean state.
+
+### Flow Steps:
+1. Navigate to the Sign up page.
+2. Fill the form with valid data (unique email, valid password, terms accepted).
+3. Submit the form.
+4. Verify redirect to the Login page.
+5. Log in with the newly created credentials.
+
+### Expected Result:
+- Sign-up succeeds and redirects to Login.
+- User can log in successfully using the created credentials and reach the home page.
+
+### Key verification points:
+- After submitting sign-up, the URL changes to `/sign-in`.
+- The newly created credentials can be used to sign in successfully.
+- After login, the user lands on the home (`/`) and main content is visible.
+
+### Notes:
+- Test data uses a random base36 suffix to avoid collisions with email.
+
+

ui/tests/sign-up/sign-up.spec.ts

@@ -4,7 +4,7 @@ import { SignInPage } from "../sign-in/sign-in-page";
 import { makeSuffix } from "../helpers";
 
 test.describe("Sign Up Flow", () => {
-  test("should register a new user successfully", { tag: ['@critical'] }, async ({ page }) => {
+  test("should register a new user successfully", { tag: ['@critical', '@e2e', '@signup', '@SIGNUP-E2E-001'] }, async ({ page }) => {
     // Initialize page objects for sign-up and sign-in flows
     const signUpPage = new SignUpPage(page);
     await signUpPage.goto();