Club come entità principale, branding e fix infrastruttura streaming.

Introduce clubs con abbonamento, branding Active Storage e flusso registrazione società; corregge healthcheck MediaMTX (immagine distroless) e allinea dominio produzione matchlivetv.it.

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

backend/app/views/public/teams/edit.html.erb

@@ -0,0 +1,23 @@
+<% content_for :title, "Modifica squadra — #{@team.name}" %>
+<% content_for :robots, "noindex, nofollow" %>
+
+<div class="wrap" style="padding-top:20px;max-width:560px">
+  <h1><%= @team.name %></h1>
+  <p style="color:#888">Società: <%= link_to @club.name, public_club_path(@club) %></p>
+  <div class="card">
+    <%= form_with url: public_team_path(@team), method: :patch, multipart: true do %>
+      <%= label_tag "team[name]", "Nome squadra" %>
+      <%= text_field_tag "team[name]", @team.name, required: true %>
+      <%= label_tag "team[sport]", "Sport" %>
+      <%= select_tag "team[sport]", options_for_select([["Pallavolo", "volleyball"], ["Calcio", "football"], ["Basket", "basketball"]], @team.sport) %>
+      <%= render "shared/branding_fields", record: @team, show_inherit_hint: true, legend: "Branding squadra (override)" %>
+      <p class="branding-hint">
+        Colori società: 
+        <span class="color-swatch" style="background:<%= @club.effective_primary_color %>"></span>
+        <span class="color-swatch" style="background:<%= @club.effective_secondary_color %>"></span>
+      </p>
+      <%= submit_tag "Salva squadra", class: "btn btn-primary" %>
+    <% end %>
+  </div>
+  <p><%= link_to "← Dashboard squadra", public_team_dashboard_path(@team) %></p>
+</div>