Fix routing removed-children memory leak on JavaFX 25

gradle.properties

@@ -1,6 +1,6 @@
 
 JPRO_VERSION = 2026.2.0
-JAVAFX_BUILD_VERSION = 17.0.18
+JAVAFX_BUILD_VERSION = 25.0.2
 JAVAFX_EXAMPLES_VERSION = 23.0.2
 JAVAFX_25_VERSION = 25.0.2
 SIMPLEFX_VERSION = 3.3.3
@@ -34,7 +34,7 @@ ASSERTJ_VERSION = 3.27.7
 HAMCREST_VERSION = 3.0
 MOCKITO_VERSION = 5.21.0
 TESTFX_VERSION = 4.0.18-jpms
-MONOCLE_VERSION = jfx-21-sandec
+MONOCLE_VERSION = jfx-25-sandec
 SLF4J_API_VERSION = 2.0.17
 LOGBACK_VERSION = 1.5.32
 

jpro-routing/core-test/src/test/scala/one/jpro/platform/routing/crawl/TestMemoryTester.scala

@@ -51,6 +51,25 @@ class TestMemoryTester {
   }
 
 
+  // Mirrors jpro-website CheckForLeaks.routeWithLeaf: same shape, only the "/x" leaf differs.
+  private def routeWithLeaf(leaf: () => javafx.scene.Node): () => Route = () =>
+    Route.empty()
+      .and(Route.get("/", r => {
+        val link = new javafx.scene.control.Label("to x")
+        one.jpro.platform.routing.LinkUtil.setLink(link, "/x", "desc")
+        Response.node(new javafx.scene.layout.VBox(link))
+      }))
+      .and(Route.get("/x", r => Response.node(leaf())))
+
+  private def crawlAndCheck(route: () => Route): Unit = {
+    val result = AppCrawler.crawlRoute("http://localhost", () => route())
+    MemoryTester.testForLeaks(result, () => route())
+  }
+
+  @Test
+  def textFlowLeakTest(): Unit =
+    crawlAndCheck(routeWithLeaf(() => new javafx.scene.text.TextFlow(new javafx.scene.text.Text("hello world"))))
+
   @Test
   def simpleFailingTest3(): Unit = {
 

jpro-routing/core/src/main/scala/one/jpro/platform/routing/sessionmanager/SessionManagerDesktop.scala

@@ -39,7 +39,12 @@ class SessionManagerDesktop(val webApp: RouteNode) extends SessionManager { THIS
         page.url = url
 
         isFullscreen = page.fullscreen
+        // JFX removed-children retention workaround: swap while the container is not tree-visible
+        // so Parent skips adding the old page to the NG peer's removed-list (which a broken/absent
+        // render pulse would otherwise never clear).
+        container.setVisible(false)
         container.children = List(page.realContent)
+        container.setVisible(true)
         scrollpane.vvalue = 0.0
         if(oldView != null && oldView != page) {
           oldView.onClose()