improvement(access-control): polish group detail filters, tooltips, and details fields

Follows the cleanup review:
- reconcile the post-save baseline from the server response instead of
  local values, matching the scope/default writes
- pin the status-filter dropdown width so the search field stops resizing
- restore flex-1 on the block-name button and move the row hover surface
  to the wrapper so Info badges align in a column
- add empty states for filter-empty lists and neutralize Select All there
- surface a 'Name is required' message next to the disabled Save
- align hint text on the field-hint tokens and drop a redundant TSDoc

Author: waleedlatif1