Search results and counts are not announced to screen readers #3989

Initial Checklist

• I understand this is a bug report and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Bug Description

Search results are only shown visually, screen readers don't hear them (WCAG 4.1.3):

• Top bar search: "Searching...", "No results" and "Show N results" in the preview (SearchBar.vue)
• Text editor search and replace: the "2 of 5" counter (TextEditorSearchAndReplacePanel.vue)

Reproduction Steps

1. Turn on a screen reader
2. Type in the top bar search or in the text editor's search and replace

Expected Outcome

The result count, "No results" and the current match are announced (polite, debounced).

Actual Outcome

Nothing is announced.