v5.1.2

Tax invoices & cash receipts — VAT is now reflected in payment amounts, and you can issue tax invoices and cash receipts.
Diagram preview in documents — Preview Mermaid diagrams written in the document body while you edit.
co CLI commands — Added activity-timeline commands for issues, CRs, and projects (activity), milestone management (project milestone), and workspace custom issue status groups (status-group), plus friendlier API error messages. (v1.0.3)

Separated settings screens — Settings that were all in one place are now split into account, workspace, and repository, so the setting you want is easier to find.
Desktop app search — You can now use search in the desktop app.
Better pipeline workflow selection — Pick multiple categories for starter workflows, and the workflow's file name now appears in the sidebar.
Member profile preview — Hover over a mention or name to see that member's profile right away.
Clearer error messages — Error messages shown when something goes wrong are now easier to understand.

Fixed an issue where merging was blocked when there was no linked issue, regardless of repository settings.
Fixed an issue where rules had to be re-checked after linking an issue to a change request.
Fixed several desktop app notification issues (duplicate notifications, notifications not marked as read when clicked, missing unread indicator, and read sync when the web and app are open at the same time).
Fixed the desktop app so you can type as soon as you click the search box.
Fixed an issue where clicking 'Open CollabOps' on the landing page did not take you to your most recent workspace.
Fixed an issue where the same request was submitted twice on rapid clicks or Enter presses.
Fixed issues where the last line of a long pipeline log was not shown automatically and steps disappeared while scrolling the log.
Fixed flickering in the pipeline log viewer the moment a run finishes.
Fixed an issue where the second mention dropdown did not open when typing mentions one after another in a document.
Fixed an issue where tabs disappeared in the notification panel.
Fixed the awkward position of the unread notification indicator.
Fixed the missing copy-link button in the issue expanded view and the notification screen.
Fixed an issue in the dashboard recent activity where the assignee name always showed as 'You' instead of the actual name.