## Summary

Migrates list-shaped `Primer::Beta::BorderBox` / `border_box_container` usages to the shared `OpenProject::Common::BorderBoxListComponent`. Shipped as a stacked PR train, one child work package per slice: #DREAM-801 (shared API), <mention class="mention" data-id="78249" data-type="work_package" data-text="#DREAM-802" data-display-id="DREAM-802">#DREAM-802</mention> , <mention class="mention" data-id="78250" data-type="work_package" data-text="#DREAM-803" data-display-id="DREAM-803">#DREAM-803</mention> , <mention class="mention" data-id="78251" data-type="work_package" data-text="#DREAM-804" data-display-id="DREAM-804">#DREAM-804</mention> .

## API changes

All exist solely to let the remaining consumers migrate — nothing more:

* `header.with_title` — linked or composed title content inside the configured heading element. Begin of the insertion

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End of the deletion * `header.with_action_icon_button` — icon-only header actions. Begin of the insertion

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End of the deletion * Header/row menus via `BorderBoxListComponent::Menu` — automatic kebab trigger, customisable via `button_arguments:` or `menu.with_show_button`. Begin of the insertion

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End of the deletion * `empty_state_behavior:` policy — `:static` (default) renders the declared or generic blankslate only while a list is empty; `:none` suppresses it (grouped surfaces); `:dynamic` shows it client-side when filtering or drag-and-drop empties a list. Begin of the insertion

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End of the deletion * Headers keep a stable height when filtering hides their action buttons. Begin of the insertion

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End of the deletion ## Screens updated (in merge order)

* #DREAM-802: project phase definitions (admin), PDF export templates (type settings). Begin of the insertion

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End of the deletion * #DREAM-803: wiki page links (work package tab), portfolios, OAuth applications (admin), project life cycle settings, project attributes settings (+ creation wizard), My account notifications. Begin of the insertion

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End of the deletion * #DREAM-804: work package meetings tab, departments (admin), work package relations tab, meeting participants, cost types settings, resource allocations. Begin of the insertion

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End of the deletion * Landed independently earlier: enumerations (admin), workflows type list. Begin of the insertion

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End of the deletion ## Hints for QA

* Migrated screens should look unchanged apart from consistent header/menu styling and the empty-state behavior below. Begin of the insertion

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End of the deletion * Filtering a list to no matches (Project attributes, Project life cycle settings, admin phase definitions) shows a blankslate inside the box — previously a bare box or a floating &quot;No items found&quot; line. Begin of the insertion

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End of the deletion * Administration → Work packages → Types: type groups without variants no longer show a blankslate row per group. Begin of the insertion

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End of the deletion * Headers with &quot;Enable all / Disable all&quot;-style actions keep their height while filtering hides the actions. Begin of the insertion

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End of the deletion * Backlogs sprint/backlog lists still show their drop-target blankslate immediately when the last card is dragged out. Begin of the insertion

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End of the deletion ## Remaining and out of scope

* `MeetingAgendaItems::ListComponent` (the empty-meeting placeholder box) moved to #DREAM-792: it renders only in the empty-meeting state that Work Package reworks, and needs the free-form empty-state slot from the #DREAM-805 follow-up line. No BorderBoxList candidates remain here. Begin of the insertion

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End of the deletion * Multi-column Begin of the insertionBorderBoxEnd of the insertion lists Begin of the insertionare tracked by [DREAM-837](https://community.openproject.org/wp/DREAM-837), using the existing `OpPrimer::BorderBoxTableComponent` and `OpPrimer::BorderBoxRowComponent`. The follow-ups cover status administration [DREAM-839](https://community.openproject.org/wp/DREAM-839), document types [DREAM-840](https://community.openproject.org/wp/DREAM-840), storages [DREAM-841](https://community.openproject.org/wp/DREAM-841),End of the insertion Begin of the deletion (document types, storages,End of the deletion wiki Begin of the insertionproviders [DREAM-842](https://community.openproject.org/wp/DREAM-842), and project documents [DREAM-843](https://community.openproject.org/wp/DREAM-843). Shared sortable-table integration is [DREAM-838](https://community.openproject.org/wp/DREAM-838), coordinated with #DREAM-671. A new DataTable is notEnd of the insertion Begin of the deletion providers, documents) wait forEnd of the deletion a Begin of the insertionprerequisite.

End of the insertion Begin of the deletion future BorderBoxTable/DataTable.

End of the deletion * Rich-header surfaces (admin project attributes sections, form-configuration groups, meeting sections) belong to the #DREAM-671 migration line — no further header-API growth here. Begin of the insertion

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End of the deletion * Begin of the deletion #DREAM-789 followsEnd of the deletion #DREAM-802 Begin of the insertionis closed, satisfying #DREAM-789's list-markup prerequisite. Document-type reordering remains in #DREAM-789; its subsequent semantic-table migration is [DREAM-840](https://community.openproject.org/wp/DREAM-840). This parent and all four list-migration children remain closed.
End of the insertion Begin of the deletion (the only remaining #DREAM-671 dependency on this effort).End of the deletion