Add browser timezone retrieval and update timezone handling logic

framework/src/Volo.Abp.AspNetCore.Components.Web/wwwroot/libs/abp/js/abp.js

@@ -252,4 +252,7 @@ var abp = abp || {};
         abp.utils.setCookieValue('__timezone', Intl.DateTimeFormat().resolvedOptions().timeZone, new Date(new Date().setFullYear(new Date().getFullYear() + 1)), '/');
     }
 
+    abp.clock.getBrowserTimeZone = function () {
+        return Intl.DateTimeFormat().resolvedOptions().timeZone
+    }
 })();

framework/src/Volo.Abp.AspNetCore.Components.WebAssembly/Volo/Abp/AspNetCore/Components/WebAssembly/WebAssemblyCachedApplicationConfigurationClient.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
 using Microsoft.JSInterop;
 using Volo.Abp.AspNetCore.Components.Web.Security;
 using Volo.Abp.AspNetCore.Mvc.ApplicationConfigurations;
@@ -79,11 +80,13 @@ public class WebAssemblyCachedApplicationConfigurationClient : ICachedApplicatio
             configurationDto.CurrentTenant.Name
         );
 
-        CurrentTimezoneProvider.TimeZone = configurationDto.Timing.TimeZone.Iana.TimeZoneName;
+        if (Clock.SupportsMultipleTimezone)
-
-        if (Clock.SupportsMultipleTimezone && !configurationDto.CurrentUser.IsAuthenticated)
         {
-            await JSRuntime.InvokeVoidAsync("abp.clock.setBrowserTimeZoneToCookie");
+            CurrentTimezoneProvider.TimeZone = !configurationDto.Timing.TimeZone.Iana.TimeZoneName.IsNullOrWhiteSpace()
+                ? configurationDto.Timing.TimeZone.Iana.TimeZoneName
+                : await JSRuntime.InvokeAsync<string>("abp.clock.getBrowserTimeZone");
+
+            await JSRuntime.InvokeAsync<string>("abp.clock.setBrowserTimeZoneToCookie");
         }
     }