Implement support ticket system with role request and bug report functionalities

- Introduced a new support ticket system allowing users to submit bug reports and role requests.
- Implemented endpoints for creating, updating, and managing support tickets, including file attachments.
- Enhanced Telegram bot integration to handle role requests directly within the bot, enabling admins to approve or reject requests without accessing the website.
- Updated database schema to include support ticket entities and their relationships.
- Improved API documentation to reflect new support ticket endpoints and their usage.
- Added necessary localization for support ticket features in both Russian and English.

backend/tests/PnvPanel.Application.Tests/Support/ReopenTicketCommandHandlerTests.cs

@@ -0,0 +1,65 @@
+using PnvPanel.Application.Support;
+using PnvPanel.Application.Support.Reopen;
+using PnvPanel.Application.Tests.TestSupport;
+using PnvPanel.Domain.Support;
+using Xunit;
+
+namespace PnvPanel.Application.Tests.Support;
+
+public class ReopenTicketCommandHandlerTests
+{
+    [Fact]
+    public async Task Handle_WhenResolved_SetsOpen()
+    {
+        using var dbContext = InMemoryDbContextFactory.Create();
+        var userId = Guid.NewGuid();
+        var ticket = SupportTicket.CreateBugReport(userId);
+        ticket.Resolve();
+        dbContext.SupportTickets.Add(ticket);
+        await dbContext.SaveChangesAsync(CancellationToken.None);
+
+        var currentUser = FakeCurrentUser.Authenticated(userId);
+        var handler = new ReopenTicketCommandHandler(dbContext, currentUser);
+
+        var result = await handler.Handle(new ReopenTicketCommand(ticket.Id), CancellationToken.None);
+
+        Assert.True(result.IsSuccess);
+        Assert.Equal(TicketStatus.Open, ticket.Status);
+    }
+
+    [Fact]
+    public async Task Handle_WhenOpen_ReturnsNotResolved()
+    {
+        using var dbContext = InMemoryDbContextFactory.Create();
+        var userId = Guid.NewGuid();
+        var ticket = SupportTicket.CreateBugReport(userId);
+        dbContext.SupportTickets.Add(ticket);
+        await dbContext.SaveChangesAsync(CancellationToken.None);
+
+        var currentUser = FakeCurrentUser.Authenticated(userId);
+        var handler = new ReopenTicketCommandHandler(dbContext, currentUser);
+
+        var result = await handler.Handle(new ReopenTicketCommand(ticket.Id), CancellationToken.None);
+
+        Assert.False(result.IsSuccess);
+        Assert.Equal(SupportErrors.NotResolved, result.Error);
+    }
+
+    [Fact]
+    public async Task Handle_WhenNotOwner_ReturnsNotFound()
+    {
+        using var dbContext = InMemoryDbContextFactory.Create();
+        var ticket = SupportTicket.CreateBugReport(Guid.NewGuid());
+        ticket.Resolve();
+        dbContext.SupportTickets.Add(ticket);
+        await dbContext.SaveChangesAsync(CancellationToken.None);
+
+        var currentUser = FakeCurrentUser.Authenticated(Guid.NewGuid());
+        var handler = new ReopenTicketCommandHandler(dbContext, currentUser);
+
+        var result = await handler.Handle(new ReopenTicketCommand(ticket.Id), CancellationToken.None);
+
+        Assert.False(result.IsSuccess);
+        Assert.Equal(SupportErrors.NotFound, result.Error);
+    }
+}