[Bug]: new Sync now button should be disabled when client is not connected

[mgallien]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

The Sync now button should be disabled when syncing is not possible because the desktop client is not connected with the server instance.

Steps to reproduce

1. Setup a sync account
2. Get the client unable to reach the server
3. Start the client and see the button is enabled

Expected behavior

Sync now is only enabled when sync is effectively possible

Which files are affected by this bug

n/a

Operating system

Linux

Which version of the operating system you are running.

debian sid

Package

Compiled it myself

Nextcloud Server version

25.0.0

Nextcloud Desktop Client version

master branch

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

No response

Additional info

No response