refactor: no group list in an account's details, and no Microsoft Graph call for it

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/app.go

@@ -172,12 +172,10 @@ type Model struct {
 	clip      Clipboard
 	clipClear time.Duration
 	openURL   func(string) error
-	// fields is the fourth pane for anything but a secret, with each
-	// account's groups as they load; lastLeft is the left pane it
-	// describes while the fourth has focus (fields.go).
+	// fields is the fourth pane for anything but a secret; lastLeft is
+	// the left pane it describes while the fourth has focus (fields.go).
 	fields   panes.Fields
 	lastLeft pane
-	groups   map[string]groupsState
 	details  map[string]detailsState // by containerKey
 	getenv   func(string) string
 	nvimOpen func(server, path string, line int) error // edit.go
@@ -377,7 +375,6 @@ func New(providers []provider.Provider, opts Options) Model {
 		getenv:        os.Getenv,
 		nvimOpen:      nvimOpen,
 		cache:         newCache(),
-		groups:        map[string]groupsState{},
 		details:       map[string]detailsState{},
 		fields:        panes.NewFields(),
 	}
@@ -590,9 +587,6 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	case persistedMsg:
 		m.handlePersisted(msg)
 
-	case groupsMsg:
-		m.groups[msg.provider] = groupsState{names: msg.names, err: msg.err}
-
 	case detailsMsg:
 		if msg.req == m.reqID[slotDetails] {
 			m.done(slotDetails)