Details pane: director and cast from Trakt

With a Trakt client ID, the details of a movie or series show the
director(s) or creators and up to 8 cast members with their roles below
the plot, in every view. The title is found on Trakt by its TMDb/TVDB
(else IMDb) id, then its people are read. Casts are cached and, like
posters, only loaded once the selection rests.

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

internal/ui/detail.go

@@ -40,6 +40,12 @@ type detailPane struct {
 	lastShow time.Time   // when the shown title last changed
 	settle   *time.Timer // shows the poster once the selection rests
 
+	// The cast from Trakt, below the plot (see people.go).
+	castKey    string // the title it belongs to
+	cast       string // rendered; "" while loading or when there is none
+	castShown  time.Time
+	castSettle *time.Timer
+
 	// What the text was last wrapped for.
 	laidOut struct {
 		width, narrow, rows int
@@ -65,6 +71,7 @@ func newDetailPane(app *App) *detailPane {
 func (d *detailPane) Show(text detailText, ref coverRef) {
 	d.detail, d.lastRef = text, ref
 	d.laidOut.valid = false
+	d.showPeople(text.people)
 	if !d.app.covers || ref.fetch == nil {
 		d.want, d.hasCover = "", false
 		d.cover.setImage(nil)
@@ -137,7 +144,11 @@ func (d *detailPane) Draw(screen tcell.Screen) {
 	}
 	if !d.laidOut.valid || d.laidOut.width != w || d.laidOut.narrow != narrow || d.laidOut.rows != rows {
 		d.laidOut.width, d.laidOut.narrow, d.laidOut.rows, d.laidOut.valid = w, narrow, rows, true
-		d.text.SetText(strings.Join(flowWrap(d.detail.String(), narrow, w, rows), "\n"))
+		text := d.detail.String()
+		if d.cast != "" {
+			text += "\n\n" + d.cast
+		}
+		d.text.SetText(strings.Join(flowWrap(text, narrow, w, rows), "\n"))
 	}
 
 	d.Flex.Draw(screen)