- Completed rewrite of `element_ae_obj_field_editor.svelte` to Svelte 5 + Tailwind v4
- Set `display_modal = true`, `modal_blocking = false`, and `modal_placement = 'center'` as new defaults
- Implemented trigger-relative modal positioning with automatic viewport boundary clamping to prevent off-screen rendering
- Migrated all 12 call sites across core and events modules (Session, Presenter, Location, Exhibit, etc.)
- Removed legacy datetime-to-local manual conversion logic from views as the component now handles it natively
- Retired Skeleton-based legacy component
- Updated testing page and documentation to reflect the new standardized primitive
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