Docs: Add Preview-Stable variable to document context

resolves https://github.com/abpframework/abp/issues/8429

modules/docs/src/Volo.Docs.Web/Models/VersionInfoViewModel.cs

@@ -8,6 +8,8 @@ namespace Volo.Docs.Models
 
         public bool IsSelected { get; set; }
 
+        public bool IsPreview { get; set; }
+
         public VersionInfoViewModel(string displayText, string version, bool isSelected = false)
         {
             DisplayText = displayText;
@@ -15,4 +17,4 @@ namespace Volo.Docs.Models
             IsSelected = isSelected;
         }
     }
-}
+}

modules/docs/src/Volo.Docs.Web/Pages/Documents/Project/Index.cshtml.cs

@@ -66,6 +66,8 @@ namespace Volo.Docs.Pages.Documents.Project
 
         public bool ShowProjectsCombobox { get; set; }
 
+        public bool IsVersionPreview { get; set; }
+
         public string DocumentLanguageCode { get; set; }
 
         public DocumentParametersDto DocumentPreferences { get; set; }
@@ -283,6 +285,7 @@ namespace Volo.Docs.Pages.Documents.Project
                     if (versionFromUrl != null)
                     {
                         versionFromUrl.IsSelected = true;
+                        IsVersionPreview = versionFromUrl.IsPreview;
                         Version = versionFromUrl.Version;
                     }
                     else
@@ -321,8 +324,9 @@ namespace Volo.Docs.Pages.Documents.Project
                     {
                         return version;
                     }
-                    
+
                     version.DisplayText = $"{version.DisplayText} ({L["Preview"].Value})";
+                    version.IsPreview = true;
 
                 }
             }
@@ -530,6 +534,7 @@ namespace Volo.Docs.Pages.Documents.Project
         {
             UserPreferences.Add("Document_Language_Code", DocumentLanguageCode);
             UserPreferences.Add("Document_Version", Version);
+            UserPreferences.Add("Release_Status", IsVersionPreview ? "preview" : "stable");
 
             var cookie = Request.Cookies["AbpDocsPreferences"];