Add the Config view: edit and save the settings, applied without a restart

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

internal/ui/detail.go

@@ -27,8 +27,9 @@ type detailPane struct {
 	cover       *coverView
 
 	detail   detailText
-	want     string // key of the poster that should be shown
-	hasCover bool   // a poster (or its loading note) is part of the content
+	lastRef  coverRef // the poster of the current detail, to fetch it again after a style change
+	want     string   // key of the poster that should be shown
+	hasCover bool     // a poster (or its loading note) is part of the content
 
 	// What the text was last wrapped for.
 	laidOut struct {
@@ -47,12 +48,13 @@ func newDetailPane(app *App) *detailPane {
 	}
 	d.AddItem(d.text, 0, 1, false)
 	d.SetBorder(true).SetTitle(" Details ")
+	app.panes = append(app.panes, d)
 	return d
 }
 
 // Show displays the text and, if there is one, the poster.
 func (d *detailPane) Show(text detailText, ref coverRef) {
-	d.detail = text
+	d.detail, d.lastRef = text, ref
 	d.laidOut.valid = false
 	if !d.app.covers || ref.fetch == nil {
 		d.want, d.hasCover = "", false