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/constants/notifications.ts

@@ -122,3 +122,37 @@ export const NOTIFY_UNCONFIRMED_HOURS = {
   title: "Unconfirmed Hours",
   message: "Would you like to confirm some of those hours?",
 };
+
+// Complex modal constants (for raw $notify calls with advanced features)
+// MembersList.vue complex modals
+export const NOTIFY_ADD_CONTACT_FIRST = {
+  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",
+};
+
+export const NOTIFY_CONTINUE_WITHOUT_ADDING = {
+  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",
+};
+
+// ContactsView.vue complex modals
+export const NOTIFY_REGISTER_CONTACT = {
+  title: "Register",
+  text: "Do you want to register them?",
+};
+
+export const NOTIFY_ONBOARDING_MEETING = {
+  title: "Onboarding Meeting",
+  text: "Would you like to start a new meeting?",
+  yesText: "Start New Meeting",
+  noText: "Join Existing Meeting",
+};
+
+// ProjectViewView.vue complex modals
+export const NOTIFY_CONFIRM_CLAIM = {
+  title: "Confirm",
+  text: "Do you personally confirm that this is true?",
+};