CodeIgniter 3.1.11 -> 3.4.5 (pocketarc fork) en PHP 8.3-fixes

- system/ vervangen door CodeIgniter 3.4.5 (pocketarc/codeigniter, PHP 8.2-8.5 compatibel)
- config.php, mimes.php, user_agents.php en error-views bijgewerkt naar 3.4.5
- composer.json: php-constraint "^7.4 || ^8.0" zodat composer install op 8.3 werkt
- PHP 8-fatals opgelost: count()/array-functies op FALSE/null, rekenen met lege
  strings, delen door nul, property zetten op FALSE, curly-brace string offsets,
  ongedefinieerde constanten, foute curl_setopt in Phantom_model::create_img
- dynamic properties gedeclareerd in libraries, optionele parameters voor verplichte opgelost
- vergelijkingen waar '' == 0 in PHP 8 anders uitvalt gecast naar (int)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

application/config/user_agents.php

@@ -61,7 +61,8 @@ $platforms = array(
 $browsers = array(
 	'OPR'			=> 'Opera',
 	'Flock'			=> 'Flock',
-	'Edge'			=> 'Edge',
+	'Edge'			=> 'Edge Legacy',
+	'Edg'			=> 'Edge',
 	'Chrome'		=> 'Chrome',
 	// Opera 10+ always reports Opera/9.80 and appends Version/<real version> to the user agent string
 	'Opera.*?Version'	=> 'Opera',
@@ -87,7 +88,8 @@ $browsers = array(
 	'amaya'			=> 'Amaya',
 	'IBrowse'		=> 'IBrowse',
 	'Maxthon'		=> 'Maxthon',
-	'Ubuntu'		=> 'Ubuntu Web Browser'
+	'Ubuntu'		=> 'Ubuntu Web Browser',
+	'Vivaldi'		=> 'Vivaldi'
 );
 
 $mobiles = array(
@@ -152,6 +154,11 @@ $mobiles = array(
 	'open web'		=> 'Open Web',
 	'openweb'		=> 'OpenWeb',
 	'meizu'                 => 'Meizu',
+	'huawei'                => 'Huawei',
+	'xiaomi'                => 'Xiaomi',
+	'oppo'                  => 'Oppo',
+	'vivo'                  => 'Vivo',
+	'infinix'               => 'Infinix',
 
 	// Operating Systems
 	'android'		=> 'Android',
@@ -212,5 +219,6 @@ $robots = array(
 	'curious george'	=> 'Curious George',
 	'ia_archiver'		=> 'Alexa Crawler',
 	'MJ12bot'		=> 'Majestic-12',
-	'Uptimebot'		=> 'Uptimebot'
+	'Uptimebot'		=> 'Uptimebot',
+	'UptimeRobot'		=> 'UptimeRobot'
 );