Refactor project files for improved readability and structure

- Cleaned up whitespace in Directory.Build.props and Directory.Packages.props for consistency.
- Reformatted project file references in PnvPanel.Api.csproj for better clarity.
- Enhanced code readability in various endpoint files by adjusting line breaks and indentation.
- Standardized method signatures and improved formatting in ResultExtensions and multiple endpoint classes for better maintainability.

backend/src/PnvPanel.Api/Endpoints/AdminStatsEndpoints.cs

@@ -27,7 +27,12 @@ public static class AdminStatsEndpoints
         return result.ToHttpResult();
     }
 
-    private static async Task<IResult> GetAudit(int page, int pageSize, ISender sender, CancellationToken cancellationToken)
+    private static async Task<IResult> GetAudit(
+        int page,
+        int pageSize,
+        ISender sender,
+        CancellationToken cancellationToken
+    )
     {
         var query = new ListAuditLogsQuery(page <= 0 ? 1 : page, pageSize <= 0 ? 50 : pageSize);
         var result = await sender.Send(query, cancellationToken);