more refactors

internal/handlers/admin_dashboard.go

@@ -13,7 +13,7 @@ import (
 
 func AdminDashboard(s *hws.Server, conn *bun.DB) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		var users *db.Users
+		var users *db.List[db.User]
 		if ok := db.WithReadTx(s, w, r, conn, func(ctx context.Context, tx bun.Tx) (bool, error) {
 			var err error
 			users, err = db.GetUsers(ctx, tx, nil)