Aggiunge i tornei con hub, pagina pubblica e tabellone per semifinali e finali.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/models/tournament_broadcast_invitation.rb

@@ -0,0 +1,55 @@
+class TournamentBroadcastInvitation < ApplicationRecord
+  SCOPE_KINDS = %w[matches court_day].freeze
+
+  belongs_to :tournament
+  belongs_to :accepted_by, class_name: "User", optional: true
+  has_many :assignments, class_name: "TournamentBroadcastAssignment",
+           foreign_key: :invitation_id, dependent: :destroy
+
+  validates :email, presence: true, format: { with: URI::MailTo::EMAIL_REGEXP }
+  validates :token_digest, presence: true, uniqueness: true
+  validates :scope_kind, inclusion: { in: SCOPE_KINDS }
+  validates :court, presence: true, if: -> { scope_kind == "court_day" }
+  validates :on_date, presence: true, if: -> { scope_kind == "court_day" }
+  validates :note, length: { maximum: 2000 }, allow_blank: true
+
+  scope :pending, -> { where(accepted_at: nil).where("expires_at > ?", Time.current) }
+  scope :accepted, -> { where.not(accepted_at: nil) }
+
+  def self.generate_token
+    SecureRandom.urlsafe_base64(32)
+  end
+
+  def expired?
+    expires_at.past?
+  end
+
+  def covers_match?(match)
+    return false if match.blank? || match.tournament_id != tournament_id
+
+    case scope_kind
+    when "court_day"
+      return false if court.blank? || on_date.blank? || match.scheduled_at.blank?
+
+      court.to_s == match.court.to_s && on_date == match.scheduled_at.in_time_zone.to_date
+    else
+      Array(match_ids).map(&:to_s).include?(match.id.to_s)
+    end
+  end
+
+  def accept!(user)
+    transaction do
+      update!(accepted_at: Time.current, accepted_by: user)
+      Tournaments::GrantBroadcastAccess.call(invitation: self, user: user)
+      Tournaments::SyncAssignments.call(invitation: self)
+    end
+  end
+
+  def scope_label
+    if scope_kind == "court_day"
+      "#{court} · #{I18n.l(on_date)}"
+    else
+      "#{Array(match_ids).size} partite"
+    end
+  end
+end