- Fix critical bug: TabsContent unmounted inactive panels, so the project
form only submitted the active tab's fields and could never save; add an
opt-in forceMount that keeps panels mounted (hidden) and use it on all
four project-form tabs
- Make Sections and Assets optional: a project saves with just Basics and
Localized Content; new projects start with no sections/assets, and the
last one can now be removed
- Update wizard progress so empty sections/assets steps count as complete
- Update save hint copy and step labels to reflect the optional steps
- Correct .claude/launch.json dev port to 3014
- Update portfolio-form-progress tests for the optional-steps behaviour