- Existing ``test_patch_drag_drop_move_todo_to_ready`` now asserts the
enriched 409 detail names the blocking parent (id, quoted title, and
current status), so the dashboard always has something actionable to
render.
- New bundle-assertion test ``test_dashboard_surfaces_ready_blocked_error_inline``
pins the frontend wiring: the ``parseApiErrorMessage`` helper exists,
the drag/drop banner runs through it, and the drawer maintains a
visible ``patchErr`` state that's cleared between PATCHes and tasks.
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