Enhance documentation with new features: added dark/light/system theme support, instructions page, and application catalog. Updated API and domain model for app management and automatic migrations on startup. Improved frontend structure with new routes and features for user instructions and app management.

backend/src/PnvPanel.Application/Common/Interfaces/IRoleService.cs

@@ -0,0 +1,18 @@
+using PnvPanel.Application.Common.Models;
+
+namespace PnvPanel.Application.Common.Interfaces;
+
+public sealed record RoleDto(Guid Id, string Name, int MaxConfigs, bool IsSystem);
+
+public interface IRoleService
+{
+    Task<Result<RoleDto>> CreateRoleAsync(string name, int maxConfigs, CancellationToken cancellationToken);
+
+    Task<Result<RoleDto>> UpdateRoleAsync(Guid roleId, int maxConfigs, CancellationToken cancellationToken);
+
+    Task<Result> DeleteRoleAsync(Guid roleId, CancellationToken cancellationToken);
+
+    Task<IReadOnlyList<RoleDto>> ListRolesAsync(CancellationToken cancellationToken);
+
+    Task<Result> ChangeUserRoleAsync(Guid userId, Guid roleId, CancellationToken cancellationToken);
+}