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/NewEditAccountView.vue

@@ -5,7 +5,7 @@
       <h1 class="text-lg text-center font-light relative px-7">
         <!-- Cancel -->
         <button
-          @click="$router.go(-1)"
+          @click="$router.back()"
           class="text-lg text-center px-2 py-1 absolute -left-2 -top-1"
         >
           <font-awesome icon="chevron-left" class="fa-fw"></font-awesome>
@@ -54,6 +54,8 @@ import { MASTER_SETTINGS_KEY } from "../db/tables/settings";
   components: {},
 })
 export default class NewEditAccountView extends Vue {
+  $router!: Router;
+
   givenName = "";
 
   // 'created' hook runs when the Vue instance is first created
@@ -69,11 +71,11 @@ export default class NewEditAccountView extends Vue {
       firstName: this.givenName,
       lastName: "", // deprecated, pre v 0.1.3
     });
-    (this.$router as Router).back();
+    this.$router.back();
   }
 
   onClickCancel() {
-    (this.$router as Router).back();
+    this.$router.back();
   }
 }
 </script>