Add JavaFX US House cross-platform installer GUI

Author: mearvk

installer/src/main/java/us/house/installer/USHouseInstaller.java

@@ -0,0 +1,56 @@
+package us.house.installer;
+
+import javafx.application.Application;
+import javafx.geometry.Insets;
+import javafx.scene.Scene;
+import javafx.scene.control.*;
+import javafx.scene.layout.*;
+import javafx.stage.Stage;
+
+/** Cross-platform JavaFX installer UI for Windows, macOS and Linux. */
+public final class USHouseInstaller extends Application {
+    private final CheckBox core = new CheckBox("1 — Core US House runtime");
+    private final CheckBox tools = new CheckBox("2 — Software-house tools and conveniences");
+    private final CheckBox configure = new CheckBox("3 — Configure after installation");
+    private final CheckBox microsoft = new CheckBox("Microsoft software integration");
+    private final CheckBox apple = new CheckBox("Apple software integration");
+    private final CheckBox launch = new CheckBox("Launch after installation");
+    private final TextArea log = new TextArea();
+
+    @Override public void start(Stage stage) {
+        core.setSelected(true); tools.setSelected(true); configure.setSelected(true);
+        Label title = new Label("US House — Installation");
+        title.setStyle("-fx-font-size:22px;-fx-font-weight:bold;");
+        Label platform = new Label("Platform: " + System.getProperty("os.name") + " / " + System.getProperty("os.arch"));
+        VBox order = new VBox(8, core, tools, configure);
+        TitledPane integrations = new TitledPane("Software integrations", new VBox(8, microsoft, apple, launch));
+        integrations.setExpanded(true);
+        Button install = new Button("Install");
+        Button close = new Button("Close");
+        install.setDefaultButton(true); install.setOnAction(e -> plan()); close.setOnAction(e -> stage.close());
+        log.setEditable(false); log.setPrefRowCount(10);
+        log.setText("Select installation stages and configuration options.\n");
+        VBox root = new VBox(14, title, platform, new Label("Installation order"), order,
+                integrations, new Label("Installer output"), log, new HBox(8, install, close));
+        root.setPadding(new Insets(18));
+        stage.setTitle("US House Installer"); stage.setScene(new Scene(root, 620, 560)); stage.show();
+    }
+
+    private void plan() {
+        log.clear();
+        log.appendText("US House installation plan\n");
+        log.appendText("1. Origin: installation request\n");
+        if (core.isSelected()) log.appendText("  • Core runtime selected\n");
+        if (tools.isSelected()) log.appendText("  • Tools/conveniences selected\n");
+        if (configure.isSelected()) log.appendText("  • Post-install configuration selected\n");
+        if (microsoft.isSelected()) log.appendText("  • Microsoft integration selected\n");
+        if (apple.isSelected()) log.appendText("  • Apple integration selected\n");
+        if (launch.isSelected()) log.appendText("  • Launch-after-install selected\n");
+        log.appendText("2. Custody: selected installation targets\n");
+        log.appendText("3. Production: platform launcher actions\n");
+        log.appendText("4. Release: installation result and verification\n");
+        log.appendText("\nGUI plan prepared. Privileged platform changes require the corresponding OS launcher.\n");
+    }
+
+    public static void main(String[] args) { launch(args); }
+}