Improve highlighting and add QoL changes

main.go

@@ -12,17 +12,24 @@ import (
 
 func main() {
 	var (
-		repo     = flag.String("repo", os.Getenv("GH_REPO"), "GitHub repository as owner/name (or GH_REPO)")
+		repo     = flag.String("repo", os.Getenv("GH_REPO"), "optional GitHub repository filter as owner/name (or GH_REPO)")
 		poll     = flag.Duration("poll", 10*time.Second, "refresh interval")
-		showAll  = flag.Bool("all", false, "show all open PRs, not only PRs authored by you")
+		showAll  = flag.Bool("all", false, "show all open PRs in --repo, not only PRs assigned to you")
 		limit    = flag.Int("limit", 50, "maximum open PRs to load (1-100)")
 		endpoint = flag.String("endpoint", "https://api.github.com/graphql", "GitHub GraphQL endpoint")
 	)
 	flag.Parse()
 
-	parts := strings.Split(*repo, "/")
-	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
-		exitf("--repo owner/name (or GH_REPO) is required")
+	var owner, name string
+	if *repo != "" {
+		parts := strings.Split(*repo, "/")
+		if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+			exitf("--repo must be owner/name")
+		}
+		owner, name = parts[0], parts[1]
+	}
+	if *showAll && owner == "" {
+		exitf("--all requires --repo")
 	}
 	if *limit < 1 || *limit > 100 {
 		exitf("--limit must be between 1 and 100")
@@ -36,7 +43,7 @@ func main() {
 	}
 
 	client := NewGitHubClient(*endpoint, token)
-	app := NewApp(client, parts[0], parts[1], *showAll, *limit, *poll)
+	app := NewApp(client, owner, name, *showAll, *limit, *poll)
 	if _, err := tea.NewProgram(app, tea.WithAltScreen()).Run(); err != nil {
 		exitf("run TUI: %v", err)
 	}