Fix vCard output #31958 (#31959)

Fix #31958 - avoid messing up ENCODIGN & add CHARSET

Workaround by limiting the too generic replacement for social networks.
Add CHARSET for proper decoding.

htdocs/core/class/vcard.class.php

@@ -2,6 +2,7 @@
 /* Copyright (C)           Kai Blankenhorn      <[email protected]>
  * Copyright (C) 2005-2017 Laurent Destailleur  <[email protected]>
  * Copyright (C) 2020		Tobias Sekan		<[email protected]>
+ * Copyright (C) 2024		MDW							<[email protected]>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -100,7 +101,7 @@ class vCard
 	/**
 	 * @var string encoding
 	 */
-	public $encoding = "ENCODING=QUOTED-PRINTABLE";
+	public $encoding = "CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE";
 
 
 	/**
@@ -163,7 +164,7 @@ public function setFormattedName($name)
 	public function setName($family = "", $first = "", $additional = "", $prefix = "", $suffix = "")
 	{
 		//$this->properties["N;".$this->encoding] = encode($family).";".encode($first).";".encode($additional).";".encode($prefix).";".encode($suffix);
-		$this->properties["N"] = encode($family).";".encode($first).";".encode($additional).";".encode($prefix).";".encode($suffix);
+		$this->properties["N;".$this->encoding] = encode($family).";".encode($first).";".encode($additional).";".encode($prefix).";".encode($suffix);
 		$this->filename = "$first%20$family.vcf";
 		if (empty($this->properties["FN"])) {
 			$this->setFormattedName(trim("$prefix $first $additional $family $suffix"));
@@ -211,7 +212,7 @@ public function setAddress($postoffice = "", $extended = "", $street = "", $city
 		$this->properties[$key] = encode($postoffice).";".encode($extended).";".encode($street).";".encode($city).";".encode($region).";".encode($zip).";".encode($country);
 
 		//if ($this->properties["LABEL;".$type.";".$this->encoding] == '') {
-			//$this->setLabel($postoffice, $extended, $street, $city, $region, $zip, $country, $type);
+		//$this->setLabel($postoffice, $extended, $street, $city, $region, $zip, $country, $type);
 		//}
 	}
 
@@ -362,7 +363,7 @@ public function getVCard()
 		$text .= "VERSION:4.0\r\n";		// With V4, all encoding are UTF-8
 		//$text.= "VERSION:2.1\r\n";
 		foreach ($this->properties as $key => $value) {
-			$newkey = preg_replace('/-.*$/', '', $key);	// remove suffix -twitter, -facebook, ...
+			$newkey = preg_replace('/(?<!QUOTED|UTF)-.*$/', '', $key);	// remove suffix -twitter, -facebook, ...
 			$text .= $newkey.":".$value."\r\n";
 		}
 		$text .= "REV:".date("Ymd")."T".date("His")."Z\r\n";