new: usr: add Contact page with email sending behaviour #4

assets/css/homepage/_auth.scss

@@ -180,6 +180,41 @@
     input[type="checkbox"] { accent-color: #236f87; }
 }
 
+.auth-checkbox {
+    accent-color: #236f87;
+    cursor: pointer;
+    width: 18px;
+    height: 18px;
+    flex-shrink: 0;
+}
+
+.auth-checkbox-label {
+    display: flex;
+    align-items: flex-start;
+    cursor: pointer;
+    user-select: none;
+    font: 400 14px 'Rajdhani', sans-serif;
+    color: rgba(255, 255, 255, 0.6);
+    line-height: 1.5;
+
+    a {
+        color: #95cff5;
+        text-decoration: none;
+        font-weight: 600;
+        transition: color 180ms;
+
+        &:hover { color: #c5e8ff; }
+    }
+}
+
+textarea.auth-input {
+    padding: 11px 14px;
+    min-height: 120px;
+    resize: vertical;
+    font-family: 'Rajdhani', sans-serif;
+    line-height: 1.5;
+}
+
 .auth-submit {
     display: flex;
     align-items: center;

assets/js/components/ContactForm.jsx

@@ -0,0 +1,83 @@
+/**
+ * This file is part of the SplendidBear Websites' projects.
+ *
+ * Copyright (c) 2026 @ www.splendidbear.org
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+import { useEffect, useRef } from 'react';
+
+/**
+ * ContactForm Component
+ *
+ * Handles reCAPTCHA v3 integration for the contact form.
+ * Intercepts form submission, executes reCAPTCHA, and submits the form with the token.
+ *
+ * @param {string} siteKey - Google reCAPTCHA site key
+ * @param {string} recaptchaFieldId - ID of the hidden recaptcha input field
+ */
+const ContactForm = ({ siteKey, recaptchaFieldId }) => {
+  const formRef = useRef(null);
+  const isSubmittingRef = useRef(false);
+
+  useEffect(() => {
+    const form = document.querySelector('.auth-form');
+
+    if (!form) {
+      console.warn('ContactForm: No .auth-form found');
+      return;
+    }
+
+    formRef.current = form;
+
+    const handleSubmit = e => {
+      e.preventDefault();
+
+      if (isSubmittingRef.current) {
+        return;
+      }
+
+      isSubmittingRef.current = true;
+
+      if ('undefined' !== typeof grecaptcha) {
+        grecaptcha.ready(() => {
+          grecaptcha
+            .execute(siteKey, { action: 'contact' })
+            .then(token => {
+              const recaptchaField = document.getElementById(recaptchaFieldId);
+
+              if (recaptchaField) {
+                recaptchaField.value = token;
+              } else {
+                console.error(`ContactForm: Recaptcha field with ID "${recaptchaFieldId}" not found`);
+              }
+
+              isSubmittingRef.current = false;
+              form.submit();
+            })
+            .catch(error => {
+              console.error('ContactForm: reCAPTCHA execution failed', error);
+              isSubmittingRef.current = false;
+            });
+        });
+      } else {
+        console.error('ContactForm: grecaptcha is not loaded');
+        isSubmittingRef.current = false;
+      }
+    };
+
+    form.addEventListener('submit', handleSubmit);
+
+    return () => {
+      if (formRef.current) {
+        formRef.current.removeEventListener('submit', handleSubmit);
+      }
+    };
+  }, [siteKey, recaptchaFieldId]);
+
+  return null;
+};
+
+export default ContactForm;

assets/js/contact.jsx

@@ -0,0 +1,31 @@
+/**
+ * This file is part of the SplendidBear Websites' projects.
+ *
+ * Copyright (c) 2026 @ www.splendidbear.org
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+import React from 'react';
+import { createRoot } from 'react-dom/client';
+import ContactForm from './components/ContactForm';
+
+const wrapper = document.getElementById('contact-form-wrapper');
+
+if (wrapper) {
+  const siteKey = wrapper.dataset.siteKey;
+  const recaptchaFieldId = wrapper.dataset.recaptchaFieldId;
+
+  if (siteKey && recaptchaFieldId) {
+    createRoot(wrapper).render(
+      <ContactForm
+        siteKey={siteKey}
+        recaptchaFieldId={recaptchaFieldId}
+      />
+    );
+  } else {
+    console.error('ContactForm: Missing siteKey or recaptchaFieldId in data attributes');
+  }
+}
+