Method CreateBoardAsync

backend/Services/BoardService.cs:322–370

(CreateBoardDto dto, int userId)

    }

    public async Task<BoardSummaryDto> CreateBoardAsync(CreateBoardDto dto, int userId)
    {
        // Check if user is workspace owner or admin
        var workspaceMember = await _db.WorkspaceMembers
            .FirstOrDefaultAsync(wm => wm.WorkspaceId == dto.WorkspaceId && wm.UserId == userId && wm.Status == "Accepted");

        var workspace = await _db.Workspaces.FindAsync(dto.WorkspaceId);

        bool isAuthorized = (workspace != null && workspace.OwnerId == userId) ||
                          (workspaceMember != null && workspaceMember.Role == "Admin");

        if (!isAuthorized)
            throw new UnauthorizedAccessException("Only workspace owners or admins can create new boards.");

        var board = new Board
        {
            Name = dto.Name,
            OwnerId = userId,
            WorkspaceId = dto.WorkspaceId,
            ThemeColor = dto.ThemeColor ?? "blue"
        };

        _db.Boards.Add(board);
        await _db.SaveChangesAsync();

        if (!dto.SkipDefaultColumns)
        {
            // Create 3 default columns
            var defaultColumns = new List<Column>
            {
                new() { Name = "To Do", Order = 0, BoardId = board.Id },
                new() { Name = "In Progress", Order = 1, BoardId = board.Id },
                new() { Name = "Done", Order = 2, BoardId = board.Id }
            };

            _db.Columns.AddRange(defaultColumns);
            await _db.SaveChangesAsync();
        }

        return new BoardSummaryDto
        {
            Id = board.Id,
            Name = board.Name,
            CreatedAt = board.CreatedAt,
            Role = "Owner",
            ThemeColor = board.ThemeColor,
            WorkspaceId = board.WorkspaceId
        };
    }

    public async Task<List<BoardMemberDto>> GetBoardMembersAsync(int boardId, int userId)
    {