fix(plugin-detail): collapse duplicate record-header overflow menus into one

[Copilot]

Record detail header rendered two ⋯ buttons whenever an object defined more record_header actions than action:bar's maxVisible (e.g. todo_task with 4 header actions). Caused by two independent overflow owners:

1. action:bar emits a ⋯ for business-action overflow past maxVisible (3).
2. DetailView hardcoded a separate <DropdownMenu> for Duplicate / Export / View History / Delete (plus mobile Share / Edit / Inline Edit fallbacks).

Neither knew about the other.

Changes

• @object-ui/components · action:bar — adds systemActions?: ActionSchema[]. Entries are always routed into the overflow menu (never inline) and share a single ⋯ trigger with any business-overflow, separator auto-inserted between groups. Schema-only keys (actions, systemActions, location, maxVisible, …) are now stripped before spreading onto the DOM to silence React "unknown attribute" warnings.
• @object-ui/components · action:menu — short-circuits to action.onClick when present, bypassing ActionEngine. Intended for chrome-level callbacks that depend on React state / DOM APIs (clipboard, navigator.share, inline-edit toggle) and are not part of the server-driven action protocol.
• @object-ui/types · ActionSchema — optional onClick?: () => void | Promise<void> UI-local escape hatch (documented as non-serializable).
• @object-ui/plugin-detail · DetailView — removed the hardcoded <DropdownMenu>; Duplicate / Export / View History / Delete and mobile-only Share / Edit / Inline Edit are built as ActionSchema[] and merged into the record-header action:bar via the new systemActions field. If callers already supply an action:bar for record_header, system actions are injected into it; otherwise a bar carrying only system actions is appended.

Invariant

A record-header action:bar renders at most one overflow menu, regardless of how many business actions the object metadata contributes. System actions never appear inline.

Illustration

// todo_task: 4 record_header actions + 4 DetailView system actions
{
  type: 'action:bar',
  location: 'record_header',
  actions: [complete, start, clone, defer],      // maxVisible=3 → 1 overflow
  systemActions: [duplicate, export, history, delete], // always overflow
}
// Renders: [Complete] [Start] [Clone] [⋯]   ← single menu, 5 items + separator

Tests

Four new action:bar tests assert the merged-overflow contract: single ⋯ even when business overflow + systemActions coexist, system actions never inline, overflow rendered when only systemActions are present.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
objectui-demo	Ready	Preview, Comment	Apr 19, 2026 10:33am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
objectui	Ignored		Apr 19, 2026 10:33am