Confirm Password UI implemented.

src/main/resources/org/to/telegramfinalproject/Fxml/check_password.fxml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.layout.*?>
+<?import javafx.scene.control.*?>
+<?import javafx.scene.image.ImageView?>
+<?import javafx.geometry.Insets?>
+
+<StackPane fx:id="overlayRoot" xmlns:fx="http://javafx.com/fxml"
+           fx:controller="org.to.telegramfinalproject.UI.CheckPasswordController"
+           styleClass="overlay-root">
+
+    <!-- Dimmed background -->
+    <Pane fx:id="overlayBackground" styleClass="overlay-background"/>
+
+    <!-- Password card -->
+    <VBox fx:id="checkPasswordCard"
+          styleClass="privacy-card"
+          spacing="16"
+          alignment="CENTER"
+          prefWidth="350" maxWidth="350"
+          prefHeight="200" maxHeight="200">
+
+        <!-- ===== Header ===== -->
+        <HBox alignment="CENTER_LEFT" spacing="10" styleClass="privacy-header">
+            <!-- Back -->
+            <Button fx:id="backButton" styleClass="icon-button"/>
+            <Label text="Confirm Password" styleClass="privacy-title"/>
+            <Pane HBox.hgrow="ALWAYS"/>
+            <!-- Close -->
+            <Button fx:id="closeButton" styleClass="icon-button" text="✕"/>
+        </HBox>
+
+        <Separator/>
+
+        <!-- ===== Form ===== -->
+        <VBox spacing="10" alignment="CENTER_LEFT" styleClass="privacy-form">
+            <Label fx:id="passwordLabel" text="Enter your current password"
+                   styleClass="password-label"/>
+            <HBox alignment="CENTER_LEFT" spacing="4" styleClass="privacy-item">
+                <PasswordField fx:id="passwordField"
+                               promptText="Current password"
+                               styleClass="privacy-input"
+                               HBox.hgrow="ALWAYS"/>
+                <TextField fx:id="visiblePasswordField"
+                           promptText="Current password"
+                           styleClass="privacy-input"
+                           visible="false"
+                           managed="false"
+                           HBox.hgrow="ALWAYS"/>
+                <Button fx:id="toggleVisibilityBtn"
+                        text="👁"
+                        styleClass="toggle-visibility-btn"/>
+            </HBox>
+        </VBox>
+
+        <!-- ===== Actions ===== -->
+        <HBox alignment="CENTER_RIGHT" spacing="10">
+            <Button fx:id="cancelButton" text="Cancel" styleClass="footer-button"/>
+            <Button fx:id="confirmButton" text="Next" styleClass="action-button"/>
+        </HBox>
+    </VBox>
+</StackPane>