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

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

backend/app/views/public/tournaments/index.html.erb

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+<% content_for :title, t("tournaments.index.title", name: @club.name) %>
+<% content_for :robots, "noindex, nofollow" %>
+
+<div class="wrap wrap--portal tournament-hub" style="padding-top:20px">
+  <nav class="team-dashboard-nav">
+    <%= link_to "← #{@club.name}", public_club_path(@club), class: "team-dashboard-nav__club" %>
+  </nav>
+
+  <header style="margin:16px 0 20px;display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start;justify-content:space-between">
+    <div>
+      <h1><%= t("tournaments.index.heading") %></h1>
+      <p style="color:#888;margin:8px 0 0"><%= t("tournaments.index.lead") %></p>
+    </div>
+    <% if @can_create %>
+      <%= link_to t("tournaments.index.new"), public_new_club_tournament_path(@club), class: "btn btn-primary" %>
+    <% end %>
+  </header>
+
+  <% unless @can_create %>
+    <div class="flash alert"><%= t("tournaments.index.upgrade") %> <%= link_to t("club.dashboard.subscription"), public_club_billing_path(@club) %></div>
+  <% end %>
+
+  <div class="card">
+    <% if @tournaments.any? %>
+      <div class="tournament-table-wrap">
+        <table class="data">
+          <thead>
+            <tr>
+              <th><%= t("tournaments.index.col_name") %></th>
+              <th><%= t("tournaments.index.col_dates") %></th>
+              <th><%= t("tournaments.index.col_status") %></th>
+              <th></th>
+            </tr>
+          </thead>
+          <tbody>
+            <% @tournaments.each do |tournament| %>
+              <tr>
+                <td><strong><%= tournament.name %></strong></td>
+                <td><%= l(tournament.starts_on) %> – <%= l(tournament.ends_on) %></td>
+                <td><%= t("tournaments.status.#{tournament.status}") %></td>
+                <td>
+                  <div class="tournament-index-actions">
+                    <%= link_to t("tournaments.index.open"), public_tournament_path(tournament), class: "btn btn-secondary", style: "padding:8px 14px;font-size:0.9rem" %>
+                    <% if tournament.published? %>
+                      <%= link_to t("tournaments.hub.public_page"), public_tournament_page_path(tournament.slug), class: "btn btn-secondary", style: "padding:8px 14px;font-size:0.9rem", target: "_blank", rel: "noopener" %>
+                    <% end %>
+                    <%= button_to t("tournaments.index.delete"), public_tournament_path(tournament), method: :delete,
+                          class: "btn btn-secondary", style: "padding:8px 14px;font-size:0.9rem",
+                          form: { data: { turbo_confirm: t("tournaments.hub.delete_confirm", name: tournament.name), confirm_kind: "delete" } } %>
+                  </div>
+                </td>
+              </tr>
+            <% end %>
+          </tbody>
+        </table>
+      </div>
+    <% else %>
+      <p style="color:#888;margin:0"><%= t("tournaments.index.empty") %></p>
+    <% end %>
+  </div>
+</div>