Extract literal strings from complex modals to notification constants

Replace hardcoded text in raw $notify calls with centralized constants:
- MembersList.vue: 2 complex modals (contact admission workflow)
- ContactsView.vue: 2 complex modals (registration, onboarding meeting)
- ProjectViewView.vue: 1 complex modal (claim confirmation)

Preserves advanced modal features (promptToStopAsking, custom buttons,
nested workflows) while standardizing text through constants for
maintainability and future localization support.

src/views/ProjectViewView.vue

@@ -610,6 +610,7 @@ import { useClipboard } from "@vueuse/core";
 import { transformImageUrlForCors } from "../libs/util";
 import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 import { createNotifyHelpers, TIMEOUTS } from "@/utils/notify";
+import { NOTIFY_CONFIRM_CLAIM } from "@/constants/notifications";
 /**
  * Project View Component
  * @author Matthew Raymer
@@ -1339,8 +1340,8 @@ export default class ProjectViewView extends Vue {
       {
         group: "modal",
         type: "confirm",
-        title: "Confirm",
-        text: "Do you personally confirm that this is true?",
+        title: NOTIFY_CONFIRM_CLAIM.title,
+        text: NOTIFY_CONFIRM_CLAIM.text,
         onYes: async () => {
           await this.confirmClaim(give);
         },