fix(platform): remove auto-fix identity selection and fix feed loading race condition

- Remove problematic $ensureActiveIdentityPopulated() that auto-selected identities
- Add user-friendly $needsActiveIdentitySelection() and $getAvailableAccountDids() methods
- Fix missing updateActiveDid implementation in CapacitorPlatformService
- Resolve race condition in HomeView initialization causing feed loading failures
- Improve TypeScript error handling in ContactsView invite processing

Addresses team concerns about data consistency and user control for identity selection.

src/views/HomeView.vue

@@ -478,7 +478,7 @@ export default class HomeView extends Vue {
 
       await this.initializeIdentity();
       // Settings already loaded in initializeIdentity()
-      await this.loadContacts();
+      // Contacts already loaded in initializeIdentity()
       // Registration check already handled in initializeIdentity()
       await this.loadFeedData();
 
@@ -600,7 +600,7 @@ export default class HomeView extends Vue {
 
       // Load contacts with graceful fallback
       try {
-        this.loadContacts();
+        await this.loadContacts();
       } catch (error) {
         this.$logAndConsole(
           `[HomeView] Failed to retrieve contacts: ${error}`,