feat: add Telegram contact form API (PHP) and connect form endpoint

public/api/contact.php

@@ -0,0 +1,64 @@
+<?php
+header('Content-Type: application/json');
+header('Access-Control-Allow-Origin: https://sag24.ru');
+header('Access-Control-Allow-Methods: POST');
+header('Access-Control-Allow-Headers: Content-Type');
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    echo json_encode(['error' => 'Method not allowed']);
+    exit;
+}
+
+$data = json_decode(file_get_contents('php://input'), true);
+if (!$data) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Invalid JSON']);
+    exit;
+}
+
+$name    = htmlspecialchars(trim($data['name'] ?? ''), ENT_QUOTES);
+$phone   = htmlspecialchars(trim($data['phone'] ?? ''), ENT_QUOTES);
+$email   = htmlspecialchars(trim($data['email'] ?? ''), ENT_QUOTES);
+$message = htmlspecialchars(trim($data['message'] ?? ''), ENT_QUOTES);
+
+if (!$name || !$message) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Missing required fields']);
+    exit;
+}
+
+$BOT_TOKEN = '8138813013:AAElH2L5NspRLSdiFjDz6Qf32n4G24P_cj8';
+$CHAT_ID   = '-5230603582';
+
+$text = "🔔 <b>Заявка с sag24.ru</b>\n\n";
+$text .= "👤 <b>Имя:</b> {$name}\n";
+if ($phone) $text .= "📱 <b>Телефон:</b> {$phone}\n";
+if ($email) $text .= "📧 <b>Email:</b> {$email}\n";
+$text .= "\n💬 <b>Сообщение:</b>\n{$message}\n";
+$text .= "\n⏰ " . date('d.m.Y H:i', time() + 3 * 3600) . " MSK";
+
+$payload = json_encode([
+    'chat_id'    => $CHAT_ID,
+    'text'       => $text,
+    'parse_mode' => 'HTML',
+]);
+
+$ch = curl_init("https://api.telegram.org/bot{$BOT_TOKEN}/sendMessage");
+curl_setopt_array($ch, [
+    CURLOPT_POST           => true,
+    CURLOPT_POSTFIELDS     => $payload,
+    CURLOPT_HTTPHEADER     => ['Content-Type: application/json'],
+    CURLOPT_RETURNTRANSFER => true,
+    CURLOPT_TIMEOUT        => 10,
+]);
+$result = curl_exec($ch);
+$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+curl_close($ch);
+
+if ($httpCode === 200) {
+    echo json_encode(['success' => true]);
+} else {
+    http_response_code(500);
+    echo json_encode(['error' => 'Failed to send notification']);
+}