Replace hardcoded notification strings with standardized constants

- Replace literal strings with notification constants in ContactsView.vue:
  * "Got an error sending the invite." → NOTIFY_INVITE_ERROR.message
  * "Could not set visibility on the server." → NOTIFY_VISIBILITY_ERROR.message
  * "Unconfirmed Hours" → NOTIFY_UNCONFIRMED_HOURS.title
- Remove unused NOTIFY_REGISTER_PROCESSING import
- Remove unused NOTIFICATION_TIMEOUTS constant in ShareMyContactInfoView.vue
- Fix unused parameter warnings in danger() and warning() methods
- Resolve all notification-related linting errors

src/components/TopMessage.vue

@@ -40,7 +40,7 @@ export default class TopMessage extends Vue {
 
   async mounted() {
     this.notify = createNotifyHelpers(this.$notify);
-    
+
     try {
       // Ultra-concise cached settings loading - replaces 50+ lines of logic!
       const settings = await this.$accountSettings(undefined, {
@@ -62,10 +62,7 @@ export default class TopMessage extends Vue {
         this.message = "You are using prod, user " + didPrefix;
       }
     } catch (err: unknown) {
-      this.notify.error(
-        JSON.stringify(err),
-        TIMEOUTS.MODAL,
-      );
+      this.notify.error(JSON.stringify(err), TIMEOUTS.MODAL);
     }
   }
 }