Mark UserProfileView.vue as human tested, update migration tracker

- Human testing confirmed UserProfileView.vue works correctly
- Updated testing tracker with 21 complete migrations (88% success)
- Added ImportAccountView.vue to ready-for-testing list
- Migration progress: 4 components human tested, 17 ready for testing

src/constants/notifications.ts

@@ -156,3 +156,9 @@ export const NOTIFY_CONFIRM_CLAIM = {
   title: "Confirm",
   text: "Do you personally confirm that this is true?",
 };
+
+// UserProfileView.vue constants
+export const NOTIFY_PROFILE_LOAD_ERROR = {
+  title: "Profile Load Error", 
+  message: "There was a problem loading the profile.",
+};