[Bug]: "Copy from Team" → Assign opens an empty Assign Owner form (selected member not passed)

[mvkonchits-db]

Area: Data Products → Owners panel (OwnershipPanel). Affects any entity that renders the shared ownership panel.
Version: v1.0.0 (09b2b31)

Summary

When a data product has an Owner Team assigned, the Owners panel shows a "Copy from Team" button. It lists the team's members; clicking Assign on a member is meant to hand off to the "Assign Owner" flow pre-filled with that member. Instead, the Assign Owner dialog opens empty, so each member must be re-typed by hand — which defeats the purpose of the feature.

Steps to reproduce

1. Open a Data Product that has an Owner Team assigned (with permission to assign owners).
2. In the Owners panel, click Copy from Team.
3. The team members are listed. Click Assign next to one.
4. The Copy-from-Team dialog closes and the Assign Owner dialog opens — but the User field is blank (no email/name pre-filled).

Expected

The Assign Owner dialog opens pre-populated with the selected member's identifier/name (role still chosen by the user), matching the dialog's own copy: "They will be assigned via the 'Assign Owner' flow where you can choose a role."

Root cause

src/frontend/src/components/common/ownership-panel.tsx — the per-member Assign handler only toggles dialog visibility and passes no member context:

onClick={() => {
  setCopyFromTeamOpen(false);
  setAssignDialogOpen(true);
}}

src/frontend/src/components/common/assign-owner-dialog.tsx — AssignOwnerDialog exposes no prop to seed the owner (open, onOpenChange, objectType, objectId, onSuccess) and resets its internal email/name state to empty whenever it opens.

Suggested fix

• Add optional initialEmail / initialName (and optionally initialType) props to AssignOwnerDialog; seed the form fields from them on open instead of always clearing.
• In OwnershipPanel, capture the clicked member in state (e.g. pendingMember) and pass initialEmail={pendingMember?.member_identifier} / initialName={pendingMember?.member_name} into AssignOwnerDialog.

Related

PRD #431 (Consolidate Team and Ownership Model).