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.Infrastructure/Persistence/MigrationExtensions.cs

@@ -0,0 +1,17 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace PnvPanel.Infrastructure.Persistence;
+
+/// <summary>
+/// Применение EF Core-миграций при старте приложения (стратегия MVP — авто-миграции).
+/// </summary>
+public static class MigrationExtensions
+{
+    public static async Task ApplyMigrationsAsync(this IServiceProvider services, CancellationToken cancellationToken = default)
+    {
+        await using var scope = services.CreateAsyncScope();
+        var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+        await dbContext.Database.MigrateAsync(cancellationToken);
+    }
+}