feat: migrate phase 1 critical identity components to active identity façade

- Update ClaimAddRawView, HomeView, IdentitySwitcherView, ImportDerivedAccountView
- Replace settings.activeDid access with () façade method
- Update switchAccount to switchIdentity using
- Add legacy fallback support for backward compatibility
- Ensure proper error handling and logging

Phase 1 completes migration of 12 critical identity-related
components to use the new Active Identity system.

src/views/HomeView.vue

@@ -538,7 +538,8 @@ export default class HomeView extends Vue {
       // **CRITICAL**: Ensure correct API server for platform
       await this.ensureCorrectApiServer();
 
-      this.activeDid = settings.activeDid || "";
+      // Use new façade method with legacy fallback
+      this.activeDid = (await this.$getActiveDid()) || "";
 
       // Load contacts with graceful fallback
       try {