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/components/MembersList.vue

@@ -192,6 +192,10 @@ import * as libsUtil from "../libs/util";
 import { NotificationIface } from "../constants/app";
 import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 import { createNotifyHelpers, TIMEOUTS } from "@/utils/notify";
+import {
+  NOTIFY_ADD_CONTACT_FIRST,
+  NOTIFY_CONTINUE_WITHOUT_ADDING,
+} from "@/constants/notifications";
 
 interface Member {
   admitted: boolean;
@@ -378,10 +382,10 @@ export default class MembersList extends Vue {
         {
           group: "modal",
           type: "confirm",
-          title: "Add as Contact First?",
-          text: "This person is not in your contacts. Would you like to add them as a contact first?",
-          yesText: "Add as Contact",
-          noText: "Skip Adding Contact",
+          title: NOTIFY_ADD_CONTACT_FIRST.title,
+          text: NOTIFY_ADD_CONTACT_FIRST.text,
+          yesText: NOTIFY_ADD_CONTACT_FIRST.yesText,
+          noText: NOTIFY_ADD_CONTACT_FIRST.noText,
           onYes: async () => {
             await this.addAsContact(decrMember);
             // After adding as contact, proceed with admission
@@ -393,9 +397,9 @@ export default class MembersList extends Vue {
               {
                 group: "modal",
                 type: "confirm",
-                title: "Continue Without Adding?",
-                text: "Are you sure you want to proceed with admission? If they are not a contact, you will not know their name after this meeting.",
-                yesText: "Continue",
+                title: NOTIFY_CONTINUE_WITHOUT_ADDING.title,
+                text: NOTIFY_CONTINUE_WITHOUT_ADDING.text,
+                yesText: NOTIFY_CONTINUE_WITHOUT_ADDING.yesText,
                 onYes: async () => {
                   await this.toggleAdmission(decrMember);
                 },