US: Revoke a role from a library member

[MaferMazu]

As a Library Admin, I want to revoke a role from a library member, so that I can reduce their access when needed.

Figma: https://www.figma.com/design/q3Knq0BKoVTBbtaxb81n9R/RBAC---Console---Wireframes?node-id=2750-12293&t=71PeX22gyABqxnHu-4
https://www.figma.com/design/q3Knq0BKoVTBbtaxb81n9R/RBAC---Console---Wireframes?node-id=2750-13331&t=71PeX22gyABqxnHu-4

Acceptance criteria

• Placement
  In the User View, each assigned role is shown as a Role Card. The card header includes a Delete control for that role.

• Access
  Visible and usable only for users with manage team permission.

• Behavior
  Clicking Delete opens a confirmation modal that warns about loss of access.
  Confirming removes that role from the member.
  If the member has no roles left after removal, redirect to the Team Members list and the user no longer appears there.
  If I am viewing my own user and the role is Library Admin, I cannot remove it, show a brief message explaining the rule.
  On success, close the modal and refresh the User View or Team Members list as applicable, show a success toast, "Role removed successfully."

• States and feedback
  While saving, disable controls and show a saving state.
  Errors are shown as an error message in the modal, design to be defined.

Notes, out of scope for this card

• API and detailed error views are defined in a separate card.

[gviedma-aulasneo]

@MaferMazu please, add the test cases:

Test Cases

Setup

• Admin A has the manage team permission for the target library.
• Member X belongs to the library and has at least one role assigned.
• Start on Libraries → Library Team Management → User View for Member X.

Scenarios

• 1) Placement, each Role Card shows a Delete control
  Given: I am logged in as Admin A on User View for Member X
  When: I scan the assigned Role Cards
  Then: I see a Delete control in the header of each Role Card

• 2) Clicking Delete opens a confirmation modal, member still has other roles
  Given: I am on User View for Member X as Admin A
  And: Member X will still have at least one other role after this removal
  When: I click Delete on a Role Card
  Then: a confirmation modal opens warning that removing this role will reduce Member X access
  And: I see Close, Cancel, Confirm controls

• 3) Clicking Delete opens a confirmation modal, this is the member's last role
  Given: I am on User View for Member X as Admin A
  And: this role is Member X last role in the library
  When: I click Delete on that Role Card
  Then: a confirmation modal opens warning that Member X will be removed from the team and lose access to the library
  And: I see Close, Cancel, Confirm controls

• 4) Confirming removes the role, refreshes the view, shows success toast
  Given: the confirmation modal is open for a role that Member X holds
  When: I click Confirm
  Then: the modal controls disable while saving
  And: when the request succeeds
  Then: the modal closes, the User View refreshes to remove that role's Role Card, and I see a success toast, Role removed successfully

• 5) Removing the last role redirects to Team Members
  Given: Member X has only one role in this library
  When: I confirm Delete for that role and the request succeeds
  Then: I am redirected to the Team Members list
  And: Member X no longer appears in that list

• 6) Self protection, cannot remove my own Library Admin role
  Given: I am viewing my own user in User View
  And: I have the Library Admin role
  When: I attempt to Delete the Library Admin role
  Then: I am blocked and I see a brief message explaining that this role cannot be removed from my own user

• 7) Cancel closes the confirmation modal without changes
  Given: the confirmation modal is open
  When: I click Cancel
  Then: the modal closes and no changes are made to Member X roles