migrate login page for javascript to java

[vaneck237]

we migrated the login page from javascript to java to improve some UI design and effects

• A window no longer opens in case of an error; the message is now displayed directly on the page.
• The borders of the required fields are displayed in red if they are missing.
• A loading spinner is displayed instead of a window.

[zikani03]

@vaneck237 please resolve merge conflicts

[vaneck237]

@zikani03 conflicts fixed

[zikani03]

@vaneck237 seems these changes cause the CI to fail when gradle and android tools plugin are upgraded. I fixed CI by downgraded gradle back to 8.3 (8.1.4 for pluging) for the CI and tests to pass on develop.

This change resulted in another merge conflict which after resolving breaks this PR.