fix: contact form — email fallback + non-fatal Telegram

- Always send email to info@sag24.ru (via server mail())
- Return success even if Telegram is unreachable (ТСПУ blocks 45.10.53.x)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/api/contact.php

@@ -56,9 +56,15 @@ $result = curl_exec($ch);
 $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 curl_close($ch);
 
-if ($httpCode === 200) {
+// Email fallback (always send, regardless of Telegram result)
+$subject  = "Заявка с сag24.ru от {$name}";
+$body     = "Имя: {$name}\n";
+if ($phone)   $body .= "Телефон: {$phone}\n";
+if ($email)   $body .= "Email: {$email}\n";
+$body .= "\nСообщение:\n{$message}\n";
+$body .= "\n" . date('d.m.Y H:i', time() + 3 * 3600) . " MSK";
+$headers  = "From: noreply@sag24.ru\r\nContent-Type: text/plain; charset=UTF-8";
+mail('info@sag24.ru', $subject, $body, $headers);
+
+// Return success regardless of Telegram result
 echo json_encode(['success' => true]);
-} else {
-    http_response_code(500);
-    echo json_encode(['error' => 'Failed to send notification']);
-}