* Add holdings tab to account view
* Basic portfolio UI
* Cleanup
* Handle missing holding data
* Remove synced at (implemented in separate pr)
* translations
* Tweak post sync streams
* Remove stale methods from merge conflict
* Add sync model
* Fresh fixtures for sync tests
* Sync tests overhaul
* Fix entry tests
* Complete remaining model test updates
* Update system tests
* Update demo data task
* Add system tests back to PR checks
* More simplifications, add empty family to fixtures for easier testing