Dashboard customize mode: reorder/hide modules and individual rows, layout saved server-side (GET/PUT /api/prefs/dashboard)

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

cmd/hamlab/main.go

@@ -141,7 +141,7 @@ func serve(cfg *config.Config) error {
 	col := metrics.NewCollector()
 	go col.Run(context.Background())
 
-	srv := api.New(cfg, sessions, mgr, col, web.FS(), version)
+	srv := api.New(cfg, sessions, mgr, col, st, web.FS(), version)
 	hs := &http.Server{
 		Addr:              cfg.Listen,
 		Handler:           srv.Handler(),