Improved the placeholder of the chat search to say what it searches (#1118)

app/MindWork AI Studio/Components/Workspaces.razor

@@ -18,7 +18,7 @@ else
                 <MudTextField T="string"
                               Text="@this.searchText"
                               TextChanged="@this.OnSearchTextChanged"
-                              Placeholder="@T("Search chats")"
+                              Placeholder="@this.SearchPlaceholder"
                               Variant="Variant.Outlined"
                               Margin="Margin.Dense"
                               Immediate="@true"

app/MindWork AI Studio/Components/Workspaces.razor.cs

@@ -115,6 +115,8 @@ public partial class Workspaces : MSGComponentBase
 
     private bool HasSearchQuery => this.SearchVisible && !string.IsNullOrWhiteSpace(this.searchText);
 
+    private string SearchPlaceholder => this.includeThreadContents ? T("Search chat names and contents") : T("Search chat names");
+
     private string GetAddChatToWorkspaceTooltip(string workspaceName) => string.Format(T("Start a new chat in workspace '{0}'"), workspaceName);
 
     private async Task<Func<string?, string?>> CreateWorkspaceNameValidationAsync(Guid excludedWorkspaceId = default, string? originalWorkspaceName = null)