Show posters as real images in kitty and Ghostty (Kitty graphics with Unicode placeholders)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/ui/detail.go

@@ -43,7 +43,7 @@ func newDetailPane(app *App) *detailPane {
 		Flex:  tview.NewFlex(),
 		app:   app,
 		text:  tview.NewTextView().SetDynamicColors(true).SetWrap(false),
-		cover: newCoverView(app.coverStyle),
+		cover: newCoverView(app.coverStyle, app.gfx, func() float64 { return app.cellAspect }),
 	}
 	d.AddItem(d.text, 0, 1, false)
 	d.SetBorder(true).SetTitle(" Details ")
@@ -85,7 +85,7 @@ func (d *detailPane) Draw(screen tcell.Screen) {
 	if d.hasCover {
 		aw, ah := d.cover.aspect()
 		// At most 40% of the width, and the text keeps some rows below.
-		d.coverW, d.coverH = coverCells(aw, ah, w*2/5, h-minTextRows)
+		d.coverW, d.coverH = coverCells(aw, ah, w*2/5, h-minTextRows, d.cover.aspectOfCells())
 		if d.coverH < minCoverRows || d.coverW < minCoverCols {
 			d.coverW, d.coverH = 0, 0
 		}