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/OnboardMeetingSetupView.vue

@@ -204,7 +204,8 @@
         class="inline-block text-blue-600"
         target="_blank"
       >
-        &bull; Open shortcut page for members <font-awesome icon="external-link" />
+        &bull; Open shortcut page for members
+        <font-awesome icon="external-link" />
       </router-link>
 
       <MembersList