[SDUI] Support compact embedded object views inside pages

[xuyushun441-sys]

Problem

SDUI pages need to compose real object-backed slices of the application, not static cards or hand-written Cloud-specific widgets. Today ObjectUI has an object-view renderer and a lower-level list-view, but neither is a clean fit for a compact home-page widget.

For ObjectStack Cloud, the home page should show a customer journey: My environments, create environment, templates, members, and usage. The "My environments" section should reuse the existing sys_environment.my_environments view in a compact card/section, not duplicate list config or expose the full object-management surface.

Current Observations

• object-view exists and can be rendered from schema, but it behaves like a full object management interface.
• list-view can be embedded directly, but authors must duplicate object/view fields, filters, empty state, permissions, row actions, and view semantics.
• Pages need a way to reference an existing object view by objectName + viewName and render it as a page section.

Proposed Direction

Enhance the existing object-view renderer, or add a generic object-view-embed wrapper, with compact page-embedding semantics.

Suggested schema shape:

{
  type: 'object-view',
  objectName: 'sys_environment',
  viewName: 'my_environments',
  variant: 'compact',
  maxRows: 5,
  showToolbar: false,
  showViewSwitcher: false,
  showCreate: false,
  emptyState: { ... },
  actions: [...]
}

The component should resolve the named view from metadata and preserve its filters, fields, empty state, permissions, row actions, and navigation behavior.

Acceptance Criteria

• A page schema can embed an object-backed section by referencing objectName and viewName.
• Compact mode suppresses full object-management chrome while keeping useful row rendering and row actions.
• Authors do not need to duplicate columns/filters from the named object view.
• Empty states and loading states are suitable for a home page section.
• Embedded lists can cap rows with maxRows and optionally expose a "View all" navigation affordance.
• Works with field permissions, row actions, and view-specific filters.
• Add tests covering view resolution, compact rendering, empty state, and maxRows behavior.

Related

• Parent SDUI runtime work: [SDUI] Epic: complete the Server-Driven UI runtime #1549
• Home page rendering work: [SDUI][P2] Home page rendering + assignment + default synthesis #1546
• Cloud customer home page use case: embed sys_environment.my_environments on the Cloud home page.