fix: add division by zero check, return zero instead of exception

RELEASE_NOTES.md

@@ -0,0 +1,2 @@
+This is no official release!  
+The Release and the release notes will be generated by github actions

src/structure/components/com_sportsmanager/mathparser.php

@@ -2323,6 +2323,10 @@ function mp_mult_($p1, $p2): float|int
  */
 function mp_div_($p1, $p2): float|int
 {
+    if ($p2 == 0) {
+        Log::add("Division by zero detected in mp_div_: divisor was 0. Returning 0 as fallback.", Log::WARNING, "com_sportsmanager");
+        return 0;
+    }
     return $p1 / $p2;
 }
 

src/structure/components/com_sportsmanager/views/sportsmanager/view_tools.php

@@ -40,7 +40,7 @@ function addOnLoad($function): void
 	<?php
 }
 
-function SportsManagerURL($weitereParameter = null, $ssl = 0): ?string
+function SportsManagerURL($weitereParameter = "", $ssl = 0): ?string
 {
     $urlPath = handleFilter($weitereParameter);
     $joomlaBaseUrl = Uri::getInstance()->toString([