E2E test suite: auth, contacts, companies, deals, chat, settings

[Baba-2001]

Summary

This PR adds and refactors end-to-end (E2E) tests for the web app using Playwright.

What's included

• Auth – Setup spec and auth flow tests; auth redirect (and related) behaviour updated.
• Contacts – E2E spec for contacts list and flows.
• Companies – Companies E2E spec and CompanyDetailPage page object updates.
• Contact activities – Refactored contact-activities E2E tests.
• Deals – Refactored deals E2E spec.
• Chat – Refactored chat E2E spec.
• Settings – Refactored settings E2E spec.
• Data – New data.spec.ts for data-related E2E coverage.
• Config – Playwright config updates and apps/web-e2e/.env.example for E2E env.