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.Application/Configs/VpnConfigDto.cs

@@ -10,10 +10,29 @@ namespace PnvPanel.Application.Configs;
 /// (сверка конфига с записью в панели у админа).
 /// </summary>
 public sealed record VpnConfigDto(
-    Guid Id, string? Label, string ClientEmail, VpnProtocol Protocol, string Location,
-    long UsedUpBytes, long UsedDownBytes, DateTimeOffset? ExpiresAt, ConfigStatus Status, DateTimeOffset CreatedAt)
+    Guid Id,
+    string? Label,
+    string ClientEmail,
+    VpnProtocol Protocol,
+    string Location,
+    long UsedUpBytes,
+    long UsedDownBytes,
+    DateTimeOffset? ExpiresAt,
+    ConfigStatus Status,
+    DateTimeOffset CreatedAt
+)
 {
-    public static VpnConfigDto FromDomain(VpnConfig config, Inbound inbound) => new(
-        config.Id, config.Label, config.ClientEmail, config.Protocol, inbound.DisplayName ?? inbound.Remark,
-        config.UsedUpBytes, config.UsedDownBytes, config.ExpiresAt, config.Status, config.CreatedAt);
+    public static VpnConfigDto FromDomain(VpnConfig config, Inbound inbound) =>
+        new(
+            config.Id,
+            config.Label,
+            config.ClientEmail,
+            config.Protocol,
+            inbound.DisplayName ?? inbound.Remark,
+            config.UsedUpBytes,
+            config.UsedDownBytes,
+            config.ExpiresAt,
+            config.Status,
+            config.CreatedAt
+        );
 }