Fix RTL: properly extract culture code from cookie format 'c=ar|uic=ar'

wwwroot/index.html

@@ -36,9 +36,11 @@
             const value = "; " + document.cookie;
             const parts = value.split("; .AspNetCore.Culture=");
             if (parts.length == 2) {
-                const culture = decodeURIComponent(parts.pop().split(";").shift());
+                const cookieValue = decodeURIComponent(parts.pop().split(";").shift());
+                // Extract just the culture code (format: "c=en|uic=en")
+                const culture = cookieValue.split('|')[0].split('=')[1];
                 const rtlLanguages = ['ar', 'he', 'fa', 'ur'];
-                document.documentElement.dir = rtlLanguages.some(lang => culture.startsWith(lang)) ? 'rtl' : 'ltr';
+                document.documentElement.dir = rtlLanguages.some(lang => culture === lang) ? 'rtl' : 'ltr';
                 document.documentElement.lang = culture;
             }
         })();
@@ -54,7 +56,7 @@
                 document.cookie = `.AspNetCore.Culture=${cookieValue}; path=/; max-age=31536000`;
                 // Set RTL direction for Arabic and other RTL languages
                 const rtlLanguages = ['ar', 'he', 'fa', 'ur'];
-                document.documentElement.dir = rtlLanguages.some(lang => value.startsWith(lang)) ? 'rtl' : 'ltr';
+                document.documentElement.dir = rtlLanguages.some(lang => value === lang) ? 'rtl' : 'ltr';
                 document.documentElement.lang = value;
             }
         };