refactor: Improve settings and feed handling in HomeView

- Split feed initialization into separate methods
- Add registration status verification
- Improve error handling and notifications
- Add JSDoc comments for better code documentation
- Make apiServer optional in settings type

The changes improve code organization by:
1. Breaking down monolithic initialization into focused methods
2. Adding proper type safety for optional settings
3. Improving error handling and user feedback
4. Adding clear documentation for methods
5. Separating concerns for feed, contacts and registration

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