Fix unstable QMS login tests

[ArtyomSavchenko]

3. [QMS] › tests/documents/ES-40.2.spec.ts:27:7 › login test › TESTS-397 - Wrong email and correct password: I cannot log in

Error: expect(locator).toContainText(expected) failed

Locator: getByText('Account not found or the provided credentials are incorrect')
Expected substring: "Account not found or the provided credentials are incorrect"
Timeout: 5000ms

[huly-github-staging]

Connected to Huly®: UBERF-14059

[Copilot]

Pull Request Overview

This PR addresses flaky QMS login tests by implementing loading state management and adding a wait mechanism before button interaction. The changes introduce an isLoading flag to prevent form validation from interfering with the login process, and add a timeout in tests to ensure form validation completes.

• Added isLoading state to LoginPasswordForm to track login progress
• Modified Form validation to skip when isLoading is true
• Added 1-second wait in test login method before checking button state

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
qms-tests/sanity/tests/model/login-page.ts	Added a 1-second timeout before button interaction to allow form validation to complete
plugins/login-resources/src/components/LoginPasswordForm.svelte	Introduced isLoading state with try-finally block to properly track login progress and pass to Form component
plugins/login-resources/src/components/Form.svelte	Modified validation logic to skip validation when isLoading is true, preventing status changes during login