Billing Stripe, link regia mobile e staff solo trasmissione.

Aggiunge fatturazione club, pagina regia condivisibile senza account, roster squadre e rimuove la modalità controller dall'app (v1.1.0).

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

backend/app/services/teams/staff_coverage.rb

@@ -0,0 +1,35 @@
+module Teams
+  class StaffCoverage
+    def initialize(team)
+      @team = team
+    end
+
+    def assigned_count(_kind = "transmission")
+      members_count + pending_invitations_count
+    end
+
+    def covered_count(_kind = "transmission")
+      assigned_count.positive? ? 1 : 0
+    end
+
+    def role_label_for(membership)
+      return "Trasmissione" if membership.staff_kind.present?
+
+      nil
+    end
+
+    def open_slot_for_invite?(_kind = "transmission")
+      assigned_count < 1
+    end
+
+    private
+
+    def members_count
+      @team.user_teams.where.not(staff_kind: nil).count
+    end
+
+    def pending_invitations_count
+      @team.team_invitations.pending.count
+    end
+  end
+end