feat(ui): add in-document search to the Markdown file preview
Ctrl/Cmd+F (and a toolbar button) opens a compact find bar over the rendered Markdown preview, with match highlighting, a live count, and next/previous navigation that scrolls the current match into view. Escape closes the bar and returns focus where it was. Merge follow-ups on top of the contribution: mount the bar in the fullscreen viewer as well as the inline preview, combine it with the FilePreviewCommentMenu wrapper that landed on main, debounce the highlight pass so typing does not re-walk the whole document on every keystroke, use the status-warning theme utilities instead of raw CSS variables for the highlights, and add the Turkish strings for the locale added after the branch was cut. Closes #2401
This commit is contained in: