feat: render dashboard data reports without iframes (#139306)

feat: render dashboard data reports without iframes (#139306)

* feat: render dashboard reports without iframes

Expose bounded native report data through show_widget and dashboard authoring. Reuse the shared widget loader and progress owner, and move mock dashboard fixtures out of production.

Closes #139263

* chore(ui): refresh generated boot module inventory

* test: remove obsolete board mock URL setup