fix: update test cases to match new UI labels

- Update RepeatEvent.test.tsx to use correct selectors and text matching
- Update EventDisplay.test.tsx to use 'Notification' instead of 'Alarm'
- Update EventModal.test.tsx to use new label names and fix description input tests
- Update Calendar.test.tsx to use new placeholder text 'Start typing a name or email'
- Fix EventDisplay.tsx to use 'Notification' label consistently

src/components/Calendar/CalendarSelection.tsx

@@ -9,7 +9,6 @@ import CalendarPopover from "./CalendarModal";
 import { Calendars } from "../../features/Calendars/CalendarTypes";
 import MoreVertIcon from "@mui/icons-material/MoreVert";
 import ArrowDropDownIcon from "@mui/icons-material/ArrowDropDown";
-import CalendarSearch from "./CalendarSearch";
 import IconButton from "@mui/material/IconButton";
 import Checkbox from "@mui/material/Checkbox";
 import ExpandMoreIcon from "@mui/icons-material/ExpandMore";