refactor: improve router type safety and usage

- Add explicit Router type imports across views
- Replace $router type casting with proper typing
- Use $router.back() instead of $router.go(-1) for consistency
- Add proper route and router typings to components
- Clean up router navigation methods
- Fix router push/back method calls

This commit improves type safety and consistency in router usage across
the application's view components.

src/views/ShareMyContactInfoView.vue

@@ -56,6 +56,7 @@ import { generateEndorserJwtUrlForAccount } from "../libs/endorserServer";
 })
 export default class ShareMyContactInfoView extends Vue {
   $notify!: (notification: NotificationIface, timeout?: number) => void;
+  $router!: Router;
 
   mounted() {
     console.log("APP_SERVER in mounted:", APP_SERVER);
@@ -106,7 +107,7 @@ export default class ShareMyContactInfoView extends Vue {
             }, 3000);
           }
         });
-      (this.$router as Router).push({ name: "contacts" });
+      this.$router.push({ name: "contacts" });
     } else {
       this.$notify(
         {