Updates tab (apt list/refresh/upgrade/changelog, reboot flag) on a new background tasks package with live WS streaming; header power button with hostname confirmation

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

cmd/hamlab/main.go

@@ -25,7 +25,9 @@ import (
 	"hamlab/internal/metrics"
 	"hamlab/internal/services"
 	"hamlab/internal/store"
+	"hamlab/internal/tasks"
 	hterm "hamlab/internal/term"
+	"hamlab/internal/updates"
 	"hamlab/internal/web"
 )
 
@@ -145,7 +147,9 @@ func serve(cfg *config.Config) error {
 
 	svc := services.New()
 	cr := cron.New(svc.Sudo(), svc.JournalSudo())
-	srv := api.New(cfg, sessions, mgr, col, st, svc, cr, web.FS(), version)
+	tm := tasks.New()
+	up := updates.New(svc.Sudo(), tm)
+	srv := api.New(cfg, sessions, mgr, col, st, svc, cr, tm, up, web.FS(), version)
 	hs := &http.Server{
 		Addr:              cfg.Listen,
 		Handler:           srv.Handler(),