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

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

backend/app/services/tournaments/generate_slug.rb

@@ -0,0 +1,30 @@
+module Tournaments
+  class GenerateSlug
+    def self.call(tournament)
+      new(tournament).call
+    end
+
+    def initialize(tournament)
+      @tournament = tournament
+    end
+
+    def call
+      base = @tournament.name.to_s.parameterize.presence || "torneo"
+      slug = base
+      n = 2
+      while conflict?(slug)
+        slug = "#{base}-#{n}"
+        n += 1
+      end
+      slug
+    end
+
+    private
+
+    def conflict?(slug)
+      scope = Tournament.where(slug: slug)
+      scope = scope.where.not(id: @tournament.id) if @tournament.persisted?
+      scope.exists?
+    end
+  end
+end