Ask the terminal before using Kitty graphics; no fontconfig-based sextants on macOS

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019reK4DUGYqDUjniWYJvwUW

internal/ui/app.go

@@ -117,6 +117,12 @@ func New(cfg *config.Config) *App {
 	}
 
 	blocks, graphics := resolveCovers(cfg.UI.CoverStyle, os.Getenv)
+	coverNote := "Posters: " + blocks.name + " block characters"
+	if graphics {
+		coverNote = "Posters: real images (the terminal confirmed the Kitty graphics protocol)"
+	} else if cfg.UI.CoverStyle == "kitty" || kittyTerminal(os.Getenv) {
+		coverNote += " (the terminal did not confirm the Kitty graphics protocol)"
+	}
 	a.coverStyle = blocks
 	if graphics {
 		a.gfx = a.newGraphics()
@@ -127,6 +133,9 @@ func New(cfg *config.Config) *App {
 	sonarrClient := sonarr.NewClient(cfg.Sonarr.URL, cfg.Sonarr.APIKey)
 	a.radarr, a.sonarr = radarrClient, sonarrClient
 	a.logs = newLogView(a)
+	if a.covers {
+		a.logs.add(levelInfo, coverNote)
+	}
 	sabClient := sabnzbd.NewClient(cfg.SABnzbd.URL, cfg.SABnzbd.APIKey)
 	a.sab = sabClient
 	a.probes = []probe{