feat: add DID display to Pending Members dialog
- Restructure member display with better visual hierarchy
- Add DID display with responsive truncation for mobile
- Simplify button labels ("Admit + Add Contacts" and "Admit Only")
- Add new AdmitPendingMembersDialog component with checkbox selection
- Support two action modes: "Admit + Add Contacts" and "Admit Only"
- Integrate dialog into MembersList with proper sequencing
- Show admit dialog before visibility dialog when pending members exist
- Fix auto-refresh pause/resume logic for both dialogs
- Ensure consistent dialog behavior between initial load and manual refresh
- Add proper async/await handling for data refresh operations
- Optimize dialog state management and remove redundant code
- Maintain proper flag timing to prevent race conditions
The admit dialog now shows automatically when there are pending members,
allowing organizers to efficiently admit multiple members at once while
optionally adding them as contacts and setting visibility preferences.
