Show poster thumbnails in the detail panes

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

internal/ui/app.go

@@ -42,6 +42,9 @@ type App struct {
 	services *tview.TextView
 	state    map[string]serviceState // keyed by service name
 	probes   []probe
+
+	covers     bool // poster thumbnails enabled
+	coverCache *coverCache
 }
 
 // probe checks that one service answers; it returns its version.
@@ -84,6 +87,9 @@ func New(cfg *config.Config) *App {
 
 		services: tview.NewTextView().SetDynamicColors(true).SetTextAlign(tview.AlignRight),
 		state:    map[string]serviceState{},
+
+		covers:     cfg.UI.ShowCovers(),
+		coverCache: newCoverCache(),
 	}
 
 	radarrClient := radarr.NewClient(cfg.Radarr.URL, cfg.Radarr.APIKey)