refactor(tests): use getByRole instead of getByText for interactive elements

- Refactor ~47 test cases across 7 test files to use getByRole
- Improve accessibility testing coverage following Testing Library best practices
- Make tests more robust against text changes (i18n, copy updates)
- Test elements as users (especially screen readers) interact with them

__test__/components/RepeatEvent.test.tsx

@@ -103,7 +103,7 @@ async function setupEventPopover(
   fireEvent.change(titleInput, { target: { value: "Meeting" } });
 
   // Click More options to expand the dialog
-  const showMoreButton = screen.getByText("More options");
+  const showMoreButton = screen.getByRole("button", { name: /More options/i });
   fireEvent.click(showMoreButton);
 
   // Check Repeat checkbox to show repeat options