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

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

backend/app/controllers/public/tournament_groups_controller.rb

@@ -0,0 +1,32 @@
+module Public
+  class TournamentGroupsController < WebBaseController
+    before_action :require_login!
+    before_action :set_tournament
+
+    def create
+      Tournaments::Entitlements.new(@club).assert_writable!
+      position = @tournament.groups.maximum(:position).to_i + 1
+      name = params.dig(:tournament_group, :name).presence || "Girone #{('A'.ord + position).chr}"
+      @tournament.groups.create!(name: name, position: position)
+      redirect_to public_tournament_path(@tournament, tab: "struttura"), notice: t("flash.tournaments.group_added")
+    rescue Tournaments::EntitlementError => e
+      redirect_to public_club_billing_path(@club), alert: e.message
+    end
+
+    def destroy
+      Tournaments::Entitlements.new(@club).assert_writable!
+      @tournament.groups.find(params[:group_id]).destroy!
+      redirect_to public_tournament_path(@tournament, tab: "struttura"), notice: t("flash.tournaments.group_removed")
+    rescue Tournaments::EntitlementError => e
+      redirect_to public_club_billing_path(@club), alert: e.message
+    end
+
+    private
+
+    def set_tournament
+      @tournament = Tournament.find(params[:id])
+      @club = @tournament.club
+      require_club_owner!(@club)
+    end
+  end
+end