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/helpers/roster_helper.rb

@@ -0,0 +1,32 @@
+module RosterHelper
+  def roster_person_avatar(person, team, size: 96)
+    primary = team.effective_primary_color
+    secondary = team.effective_secondary_color
+    style = "--avatar-primary:#{primary};--avatar-secondary:#{secondary};width:#{size}px;height:#{size}px"
+
+    if person.photo_url.present?
+      image_tag person.photo_url, alt: person.full_name, class: "roster-avatar roster-avatar--photo",
+                style: style, width: size, height: size
+    else
+      tag.div(
+        person.initials,
+        class: "roster-avatar roster-avatar--placeholder",
+        style: "#{style};font-size:#{(size * 0.34).round}px",
+        aria: { label: person.full_name }
+      )
+    end
+  end
+
+  def roster_category_options
+    TeamRosterMember::DISPLAY_ORDER.map do |cat|
+      [TeamRosterMember::CATEGORY_LABELS[cat], cat]
+    end
+  end
+
+  def roster_player_role_options(selected = nil)
+    options_for_select(
+      [["— Seleziona ruolo —", ""]] + TeamRosterMember::VOLLEYBALL_PLAYER_ROLES.map { |r| [r, r] },
+      selected
+    )
+  end
+end