Accounting entries created from uploaded documents now show a smart button that opens the related document. This makes it easier for finance users to verify the original file without searching in Documents, while the button only appears when an uploaded document exists.

**Spec:**
Implementing the smart (stat) button for documents sent to Accounting, 
which leads back to the document.

**After this PR:**
The stat button will be added in accounting which will lead back to the
document. (This button will only be seen if the document is uploaded)

Task-3856956

The spreadsheet app has been updated to a newer version, bringing improvements to pivot tables, lists, and global filter handling. Users should see smoother spreadsheet interactions, including better keyboard navigation for pivot dimensions and updated side panels that support the latest spreadsheet experience.

The Appointment app now supports checking whether calendar integrations are synchronized, helping the calendar controls work correctly. The appointment calendar header was also adjusted so sharing availability and synchronization buttons fit together better.

This commit adds the route for checking the synchronization status of calendar integration modules in order to fix the current QUnit tests.

related: odoo/odoo#150186
task-3570379

When an approval request is created, the person who owns the related record is automatically added as a follower. This helps ensure the owner stays informed and receives notifications about the approval process without manual setup.

When an approval request is created, the owner of the record is added as a follower of the approval request. This way, the owner will receive notifications about the approval request.

task-3672542