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/NewIdentifierView.vue

@@ -62,12 +62,13 @@ import QuickNav from "../components/QuickNav.vue";
 @Component({ components: { QuickNav } })
 export default class NewIdentifierView extends Vue {
   loading = true;
+  $router!: Router;
 
   async mounted() {
     await generateSaveAndActivateIdentity();
     this.loading = false;
     setTimeout(() => {
-      (this.$router as Router).push({ name: "home" });
+      this.$router.push({ name: "home" });
     }, 1000);
   }
 }