Fix duplicate export declarations and migrate ContactsView with sub-components

- Remove duplicate NOTIFY_INVITE_MISSING and NOTIFY_INVITE_PROCESSING_ERROR exports
- Update InviteOneAcceptView.vue to use correct NOTIFY_INVITE_TRUNCATED_DATA constant
- Migrate ContactsView to PlatformServiceMixin and extract into modular sub-components
- Resolves TypeScript compilation errors preventing web build

src/types/global.d.ts

@@ -77,5 +77,7 @@ declare global {
 declare module 'vue' {
   interface ComponentCustomProperties {
     $notify: (notification: any, timeout?: number) => void;
+    $route: import('vue-router').RouteLocationNormalizedLoaded;
+    $router: import('vue-router').Router;
   }
 }