Stabilizza regia, live web e sync punteggi app nativa.

Corregge scadenza token regia oltre le 8h, tabellone HTML sulla pagina live,
pulsanti pausa/ripresa in regia, link admin e broadcast ActionCable diretto.
App Android: overlay branding, sync score da regia via WebSocket con reconnect e poll.

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

backend/app/models/match.rb

@@ -2,11 +2,16 @@ class Match < ApplicationRecord
   belongs_to :team
   has_many :stream_sessions, dependent: :destroy
 
+  has_one_attached :opponent_logo_file
+
   ACTIVE_SESSION_STATUSES = %w[live connecting reconnecting paused].freeze
+  DEFAULT_OPPONENT_COLOR = "#1E3A8A"
 
   validates :opponent_name, presence: true
   validates :sets_to_win, numericality: { greater_than: 0, less_than: 6 }
+  validates :opponent_primary_color, format: { with: Brandable::HEX_COLOR }, allow_blank: true
   validate :scoring_rules_shape, if: -> { scoring_rules.present? }
+  validate :opponent_logo_file_type, if: -> { opponent_logo_file.attached? }
 
   # category: campionato / descrizione torneo (facoltativo, es. "Serie C").
 
@@ -63,6 +68,16 @@ class Match < ApplicationRecord
     stream_sessions.where(status: %w[ended error]).exists?
   end
 
+  def opponent_logo_url
+    return unless opponent_logo_file.attached?
+
+    Rails.application.routes.url_helpers.rails_blob_path(opponent_logo_file, only_path: true)
+  end
+
+  def effective_opponent_primary_color
+    opponent_primary_color.presence || DEFAULT_OPPONENT_COLOR
+  end
+
   # Hub app coach: dirette da riprendere o partite programmate future.
   # Le bozze «Avversario» abbandonate (senza sessione) non compaiono.
   def coach_hub_visible?
@@ -77,6 +92,12 @@ class Match < ApplicationRecord
 
   private
 
+  def opponent_logo_file_type
+    return if opponent_logo_file.content_type.in?(%w[image/png image/jpeg image/webp])
+
+    errors.add(:opponent_logo_file, "deve essere PNG, JPEG o WebP")
+  end
+
   def scoring_rules_shape
     rules = scoring_rules.is_a?(Hash) ? scoring_rules : {}
     %w[points_per_set points_deciding_set min_point_lead].each do |key|