[Fix] [Studio]: Disable auto-sync when logged out

[dicnunz]

Summary

• disable the Auto-Sync switch for logged-out users and force it visually off
• show the logged-out helper text requested in [BUG]: Disable Auto-Sync toggle when user is logged out in settings #64
• keep the saved Auto-Sync state intact once a user is logged in

Closes #64

Tests

• npm run test:contracts -w @veriworkly/studio
• NEXT_PUBLIC_BACKEND_URL=http://localhost:8080/api/v1 npm run build -w @veriworkly/studio
• git diff --check

[Gautam25Raj]

Hi @dicnunz, thank you for the PR!

The core changes for disabling auto-sync when logged out look great and work perfectly.

However, we would like to keep our test suite focused and want to omit the test contract file (sync-settings.contract.test.ts) at this time.

Could you please remove the test file apps/studio/tests/contracts/sync-settings.contract.test.ts? Once that's done, we'll be ready to approve and merge this!