Fix basePath default from "./" to "/" to match test expectations

Agent-Logs-Url: https://github.com/Quafadas/live-server-scala-cli-js/sessions/24a97568-8019-4fbb-83e1-28160ecdcdb2

Co-authored-by: Quafadas <24899792+Quafadas@users.noreply.github.com>

Author: Copilot

plugin/src/refresh_plugin.scala

@@ -46,7 +46,7 @@ trait ScalaJsRefreshModule extends ScalaJSConfigModule:
 
   def titleString: String = "App"
 
-  def bodyHtmlFromReport(report: Report, basePath: String = "./", includeRefresh: Boolean = false): String =
+  def bodyHtmlFromReport(report: Report, basePath: String = "/", includeRefresh: Boolean = false): String =
     val scriptTags = report.publicModules.map(m => script(src := s"$basePath${m.jsFileName}", `type` := "module"))
     body(
       frag(scriptTags.toSeq*),