feat: add claim confirmation functionality to activity feed

- Add confirm button functionality to ActivityListItem
- Implement confirmation logic in HomeView
- Add proper button state handling and validation

Technical Changes:
- Add canConfirm computed property to validate confirmation ability
- Add handleConfirmClick method with proper error handling
- Pass required props (isRegistered, activeDid, confirmerIdList)
- Add confirmation dialog with user verification
- Implement claim submission with proper cleanup
- Add visual feedback for button states
- Update feed after successful confirmation

UI/UX Improvements:
- Add disabled state styling for confirm button
- Show proper error messages for invalid confirmation attempts
- Add loading and success notifications
- Improve button accessibility with proper states

Bug Fixes:
- Make apiServer optional in settings type
- Fix settings update during registration
- Add proper type checking for claim confirmation

This adds the ability to confirm claims directly from the
activity feed with proper validation, error handling, and
user feedback. The confirmation flow matches the existing
claim view confirmation functionality.

src/db/tables/settings.ts

@@ -20,7 +20,7 @@ export type Settings = {
   // active Decentralized ID
   activeDid?: string; // only used in the MASTER_SETTINGS_KEY entry
 
-  apiServer: string; // API server URL
+  apiServer?: string; // API server URL
 
   filterFeedByNearby?: boolean; // filter by nearby
   filterFeedByVisible?: boolean; // filter by visible users ie. anyone not hidden