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/ContactGiftingView.vue

@@ -71,7 +71,7 @@
 
 <script lang="ts">
 import { Component, Vue } from "vue-facing-decorator";
-import { Router } from "vue-router";
+import { RouteLocationNormalizedLoaded, Router } from "vue-router";
 
 import GiftedDialog from "../components/GiftedDialog.vue";
 import QuickNav from "../components/QuickNav.vue";
@@ -86,6 +86,8 @@ import { GiverReceiverInputInfo } from "../libs/util";
 })
 export default class ContactGiftingView extends Vue {
   $notify!: (notification: NotificationIface, timeout?: number) => void;
+  $route!: RouteLocationNormalizedLoaded;
+  $router!: Router;
 
   activeDid = "";
   allContacts: Array<Contact> = [];
@@ -107,9 +109,8 @@ export default class ContactGiftingView extends Vue {
         (a.name || "").localeCompare(b.name || ""),
       );
 
-      this.projectId = (this.$route as Router).query["projectId"] || "";
-
-      this.prompt = (this.$route as Router).query["prompt"] ?? this.prompt;
+      this.projectId = (this.$route.query["projectId"] as string) || "";
+      this.prompt = (this.$route.query["prompt"] as string) ?? this.prompt;
 
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
     } catch (err: any) {