A preview tab whose file was moved or deleted rendered "Preview unavailable" with nothing to click, so the only way out was the strip's close glyph. The file read/PDF error states and the missing-artifact state now offer a Close button wired to the tile's own closeTabPane, the same close the strip and Cmd+W run. Adapts the onClose threading from #93194. Co-authored-by: Axl Ibiza, MBA <andrexibiza@gmail.com>