Merge branch 'feature/adaptive-bitrate' into collaudo

Integra bitrate adattivo e telemetria, con il mute audio come icona nella toolbar della regia.

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

backend/app/channels/session_channel.rb

@@ -59,6 +59,8 @@ class SessionChannel < ApplicationCable::Channel
       Sessions::SetAudioMute.new(session, muted: true).call
     when "unmute_audio"
       Sessions::SetAudioMute.new(session, muted: false).call
+    when "set_min_quality"
+      Sessions::SetMinQuality.new(session, preset: data["min_quality_preset"]).call
     end
   end
 

backend/app/controllers/api/v1/stream_sessions_controller.rb

@@ -74,6 +74,7 @@ module Api
           current_bitrate: params[:current_bitrate],
           target_bitrate: params[:target_bitrate],
           fps: params[:fps],
+          thermal_state: sanitized_thermal_state,
           last_seen_at: Time.current
         )
         sync_publisher_when_streaming!(params[:fps].to_f)
@@ -147,6 +148,13 @@ module Api
         }
       end
 
+      def min_quality
+        Sessions::SetMinQuality.new(@session, preset: params[:min_quality_preset]).call
+        render json: session_json(@session)
+      rescue ArgumentError => e
+        render json: { error: e.message }, status: :unprocessable_entity
+      end
+
       def youtube_stats
         count = if @session.platform == "youtube" && @session.youtube_broadcast_id.present?
                   Youtube::BroadcastService.new(@session.match.team)
@@ -166,6 +174,11 @@ module Api
                                 .find(params[:id])
       end
 
+      def sanitized_thermal_state
+        value = params[:thermal_state].to_s.downcase.presence
+        value if value.in?(%w[nominal fair serious critical])
+      end
+
       def session_params
         params.permit(:platform, :privacy_status, :quality_preset, :target_bitrate, :target_fps, :youtube_channel)
       end
@@ -194,6 +207,7 @@ module Api
           youtube_ready: session.youtube_ready?,
           privacy_status: session.privacy_status,
           quality_preset: session.quality_preset,
+          min_quality_preset: session.min_quality_preset,
           target_bitrate: session.target_bitrate,
           started_at: session.started_at,
           disconnection_count: session.disconnection_count,

backend/app/controllers/public/regia_controller.rb

@@ -7,7 +7,7 @@ module Public
     layout "regia"
 
     protect_from_forgery with: :null_session
-    skip_before_action :verify_authenticity_token, only: %i[score pause resume stop audio_mute]
+    skip_before_action :verify_authenticity_token, only: %i[score pause resume stop audio_mute min_quality]
 
     before_action :set_session_from_token
 
@@ -67,8 +67,20 @@ module Public
       render json: status_payload
     end
 
+    def min_quality
+      Sessions::SetMinQuality.new(@session, preset: params[:min_quality_preset]).call
+      render json: status_payload
+    rescue ArgumentError => e
+      render json: status_payload.merge(error: e.message), status: :unprocessable_entity
+    end
+
     private
 
+    def camera_telemetry_payload(publisher_online)
+      cam = @session.device_states.find_by(device_role: "camera")
+      (cam&.as_regia_payload || {}).merge(publisher_online: publisher_online)
+    end
+
     def set_session_from_token
       @session = Sessions::RegiaAccess.find_session_by_token(params[:token])
       return if @session
@@ -93,7 +105,10 @@ module Public
         home_name: @session.match.team.name,
         away_name: @session.match.opponent_name,
         points_target: Scoring::Rules.points_target_for_match(@session.match, current_set: score&.current_set || 1),
-        score: score&.as_cable_payload
+        score: score&.as_cable_payload,
+        min_quality_preset: @session.min_quality_preset,
+        min_quality_options: Sessions::SelectQuality.allowed_min_ids(@session.quality_preset),
+        telemetry: camera_telemetry_payload(publisher_online)
       }
     end
   end

backend/app/helpers/public/regia_helper.rb

@@ -57,8 +57,14 @@ module Public
         copyPrompt: t("regia.js.copy_prompt"),
         shareRegiaText: t("regia.js.share_regia_text"),
         shareLiveText: t("regia.js.share_live_text"),
+        minQualityUpdated: t("regia.js.min_quality_updated"),
+        minQualityError: t("regia.js.min_quality_error"),
+        minQualityAuto: t("regia.min_quality.auto"),
         previewWaiting: t("regia.preview_waiting"),
         streamEnded: t("regia.preview_ended"),
+        previewHide: t("regia.preview_hide"),
+        previewShow: t("regia.preview_show"),
+        previewOffHint: t("regia.preview_off_hint"),
         resumeLabel: t("regia.resume"),
         pauseLabel: t("regia.pause"),
         muteLabel: t("regia.mute"),
@@ -67,7 +73,20 @@ module Public
         pausedBadge: t("regia.status.paused"),
         liveBadge: t("regia.status.live"),
         waitingBadge: t("regia.status.waiting"),
-        subtitlePrefix: t("regia.subtitle_prefix")
+        subtitlePrefix: t("regia.subtitle_prefix"),
+        telemetryWaiting: t("regia.telemetry.waiting"),
+        telemetryStale: t("regia.telemetry.stale"),
+        telemetryJustNow: t("regia.telemetry.just_now"),
+        telemetrySecondsAgo: t("regia.telemetry.seconds_ago"),
+        telemetryPublisherOn: t("regia.telemetry.publisher_on"),
+        telemetryPublisherOff: t("regia.telemetry.publisher_off"),
+        telemetryThermalNominal: t("regia.telemetry.thermal_nominal"),
+        telemetryThermalFair: t("regia.telemetry.thermal_fair"),
+        telemetryThermalSerious: t("regia.telemetry.thermal_serious"),
+        telemetryThermalCritical: t("regia.telemetry.thermal_critical"),
+        telemetryBitrateMax: t("regia.telemetry.bitrate_max"),
+        telemetryBitrateTitle: t("regia.telemetry.bitrate_title"),
+        telemetryBitrateTap: t("regia.telemetry.bitrate_tap")
       }.to_json
     end
 

backend/app/models/device_state.rb

@@ -16,4 +16,17 @@ class DeviceState < ApplicationRecord
       status: stream_session.status
     }
   end
+
+  def as_regia_payload
+    {
+      battery: battery_level,
+      network: network_type,
+      signal: signal_strength,
+      bitrate: current_bitrate,
+      target_bitrate: target_bitrate,
+      fps: fps,
+      thermal_state: thermal_state,
+      last_seen_at: last_seen_at&.iso8601
+    }
+  end
 end

backend/app/models/stream_session.rb

@@ -15,6 +15,7 @@ class StreamSession < ApplicationRecord
   validates :platform, inclusion: { in: PLATFORMS }
   validates :status, inclusion: { in: STATUSES }
   validates :privacy_status, inclusion: { in: PRIVACY_STATUSES }
+  validates :min_quality_preset, inclusion: { in: Sessions::SelectQuality::MIN_QUALITY_IDS }
 
   before_validation :normalize_privacy_status
   before_validation :ensure_publish_token, on: :create

backend/app/services/sessions/pause.rb

@@ -9,11 +9,12 @@ module Sessions
       @session.pause! if @session.may_pause?
       Mediamtx::PublisherSync.forget_recording_state!(@session.id)
       begin
-        Mediamtx::Client.for_session(@session).set_path_recording(@session, enabled: false)
+        mtx = Mediamtx::Client.for_session(@session)
+        mtx.set_path_recording(@session, enabled: false)
+        mtx.set_always_available(@session, enabled: true)
       rescue Mediamtx::Client::Error => e
-        Rails.logger.warn("[Sessions::Pause] disable recording: #{e.message}")
+        Rails.logger.warn("[Sessions::Pause] MediaMTX: #{e.message}")
       end
-      Mediamtx::Client.for_session(@session).set_always_available(@session, enabled: true)
       # Slate su path per HLS in pausa; RTMP telefono si ferma via comando app.
       log_event("paused")
       SessionChannel.broadcast_message(@session, { type: "command", action: "pause_stream" })

backend/app/services/sessions/select_quality.rb

@@ -3,6 +3,8 @@ module Sessions
   class SelectQuality
     UPLOAD_HEADROOM = 0.8
     UPLOAD_HEADROOM_1080P = 1.0
+    AUTO_ID = "auto"
+    AUTO_FLOOR_BITRATE = 800_000
 
     PRESETS = [
       { id: "1080p_30_4.5mbps", target_bitrate: 4_500_000, target_fps: 30 },
@@ -11,6 +13,32 @@ module Sessions
       { id: "720p_30_1.5mbps", target_bitrate: 1_500_000, target_fps: 30 }
     ].freeze
 
+    MIN_QUALITY_IDS = ([AUTO_ID] + PRESETS.map { |preset| preset[:id] }).freeze
+
+    def self.floor_bitrate(preset_id)
+      return AUTO_FLOOR_BITRATE if preset_id.blank? || preset_id == AUTO_ID
+
+      PRESETS.find { |preset| preset[:id] == preset_id }&.fetch(:target_bitrate) || AUTO_FLOOR_BITRATE
+    end
+
+    def self.allowed_min_ids(session_preset)
+      ids = [AUTO_ID] + PRESETS.reject { |preset| preset[:id].start_with?("1080p") }.reverse.map { |preset| preset[:id] }
+      ids << "1080p_30_4.5mbps" if session_preset.to_s.start_with?("1080p")
+      ids
+    end
+
+    def self.display_name(preset_id)
+      return AUTO_ID if preset_id.blank? || preset_id == AUTO_ID
+
+      preset = PRESETS.find { |item| item[:id] == preset_id }
+      return preset_id unless preset
+
+      resolution = preset[:id].start_with?("1080p") ? "1080p" : "720p"
+      mbps = preset[:target_bitrate] / 1_000_000.0
+      mbps_text = (mbps == mbps.to_i) ? mbps.to_i.to_s : format("%.1f", mbps)
+      "#{resolution} · #{mbps_text} Mbps"
+    end
+
     def self.call(upload_mbps:)
       new(upload_mbps: upload_mbps).call
     end

backend/app/services/sessions/set_min_quality.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Sessions
+  class SetMinQuality
+    def initialize(session, preset:)
+      @session = session
+      @preset = preset.to_s.strip
+    end
+
+    def call
+      id = normalize
+      unless SelectQuality.allowed_min_ids(@session.quality_preset).include?(id)
+        raise ArgumentError, "Qualità minima non valida"
+      end
+
+      return @session if @session.min_quality_preset == id
+
+      @session.update!(min_quality_preset: id)
+      @session.stream_events.create!(
+        event_type: "quality_changed",
+        occurred_at: Time.current,
+        metadata: { "min_quality_preset" => id }
+      )
+      SessionChannel.broadcast_message(
+        @session,
+        { type: "command", action: "set_min_quality", min_quality_preset: id }
+      )
+      @session
+    end
+
+    private
+
+    def normalize
+      return SelectQuality::AUTO_ID if @preset.blank? || @preset == SelectQuality::AUTO_ID
+
+      @preset
+    end
+  end
+end

backend/app/views/layouts/regia.html.erb

@@ -7,7 +7,7 @@
     <meta name="theme-color" content="#0a0a0e">
     <title><%= content_for?(:title) ? yield(:title) : t("regia.meta_title_fallback") %></title>
     <%= render "shared/meta_tags" %>
-    <link rel="stylesheet" href="/regia.css?v=1">
+    <link rel="stylesheet" href="/regia.css?v=11">
     <%= yield :head %>
   </head>
   <body class="regia-body">

backend/app/views/public/regia/_volley.html.erb

@@ -21,4 +21,4 @@
     <button type="button" class="regia-btn regia-btn--minus" data-action="away_undo" style="width:100%;margin-top:6px">−</button>
   </div>
 </div>
-<button type="button" class="regia-btn regia-btn--yellow" data-action="close_set" style="margin-top:12px"><%= t("regia.board.close_set") %></button>
+<button type="button" class="regia-btn regia-btn--yellow" data-action="close_set"><%= t("regia.board.close_set") %></button>

backend/app/views/public/regia/show.html.erb

@@ -17,6 +17,8 @@
      data-resume-url="<%= j public_regia_resume_path(params[:token]) %>"
      data-audio-mute-url="<%= j public_regia_audio_mute_path(params[:token]) %>"
      data-stop-url="<%= j public_regia_stop_path(params[:token]) %>"
+     data-min-quality-url="<%= j public_regia_min_quality_path(params[:token]) %>"
+     data-min-quality="<%= j @session.min_quality_preset %>"
      data-cable-url="<%= j "/cable?regia_token=#{params[:token]}" %>"
      data-hls-url="<%= j @session.hls_playback_url %>"
      data-home-name="<%= j @team.name %>"
@@ -31,56 +33,122 @@
      data-initial-audio-muted="<%= @session.audio_muted %>">
 
   <header class="regia-header">
-    <h1><%= @team.name %> vs <%= @match.opponent_name %></h1>
-    <p id="regia-subtitle"><%= t("regia.subtitle_prefix") %> <%= regia_header_subtitle(@match, @score) %></p>
+    <div class="regia-header__text">
+      <h1><%= @team.name %> vs <%= @match.opponent_name %></h1>
+      <p id="regia-subtitle"><%= t("regia.subtitle_prefix") %> <%= regia_header_subtitle(@match, @score) %></p>
+    </div>
     <span id="regia-badge" class="regia-badge <%= @stream_closed ? 'regia-badge--ended' : (@session.paused? ? 'regia-badge--wait' : (@on_air ? 'regia-badge--live' : 'regia-badge--wait')) %>">
       <%= @stream_closed ? t("regia.status.ended") : (@session.paused? ? t("regia.status.paused") : (@on_air ? t("regia.status.live") : t("regia.status.waiting"))) %>
     </span>
   </header>
 
-  <% if @live_share_url.present? %>
-    <div class="regia-share-group">
-      <p class="regia-share-label"><%= t("regia.live_share_label") %></p>
-      <div class="regia-share">
-        <button type="button" class="regia-btn regia-btn--outline" id="btn-share-live" style="margin:0">
-          <%= t("regia.share_live") %>
+  <nav class="regia-toolbar" aria-label="<%= t("regia.links_nav") %>">
+    <% if @live_share_url.present? %>
+      <div class="regia-tool-group" role="group" aria-label="<%= t("regia.live_share_label") %>">
+        <span class="regia-tool-group__label"><%= t("regia.live_share_label") %></span>
+        <div class="regia-tool-group__btns">
+          <button type="button" class="regia-icon-btn" id="btn-share-live" aria-label="<%= t("regia.share_live") %>" title="<%= t("regia.share_live") %>">
+            <svg class="icon-outline" viewBox="0 0 24 24" aria-hidden="true"><circle cx="18" cy="5" r="3"/><circle cx="6" cy="12" r="3"/><circle cx="18" cy="19" r="3"/><line x1="8.59" y1="13.51" x2="15.42" y2="17.49"/><line x1="15.41" y1="6.51" x2="8.59" y2="10.49"/></svg>
+          </button>
+          <button type="button" class="regia-icon-btn" id="btn-copy-live" aria-label="<%= t("regia.copy_live") %>" title="<%= t("regia.copy_live") %>">
+            <svg class="icon-outline" viewBox="0 0 24 24" aria-hidden="true"><rect x="9" y="9" width="13" height="13" rx="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>
+          </button>
+        </div>
+      </div>
+    <% end %>
+    <div class="regia-tool-group" role="group" aria-label="<%= t("regia.regia_share_label") %>">
+      <span class="regia-tool-group__label"><%= t("regia.regia_share_label") %></span>
+      <div class="regia-tool-group__btns">
+        <button type="button" class="regia-icon-btn" id="btn-share-regia" aria-label="<%= t("regia.share_regia") %>" title="<%= t("regia.share_regia") %>">
+          <svg class="icon-outline" viewBox="0 0 24 24" aria-hidden="true"><circle cx="18" cy="5" r="3"/><circle cx="6" cy="12" r="3"/><circle cx="18" cy="19" r="3"/><line x1="8.59" y1="13.51" x2="15.42" y2="17.49"/><line x1="15.41" y1="6.51" x2="8.59" y2="10.49"/></svg>
         </button>
-        <button type="button" class="regia-btn regia-btn--outline" id="btn-copy-live" style="margin:0">
-          <%= t("regia.copy_link") %>
+        <button type="button" class="regia-icon-btn" id="btn-copy-regia" aria-label="<%= t("regia.copy_regia") %>" title="<%= t("regia.copy_regia") %>">
+          <svg class="icon-outline" viewBox="0 0 24 24" aria-hidden="true"><rect x="9" y="9" width="13" height="13" rx="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>
         </button>
       </div>
     </div>
-  <% end %>
-
-  <div class="regia-share-group">
-    <p class="regia-share-label"><%= t("regia.regia_share_label") %></p>
-    <div class="regia-share">
-      <button type="button" class="regia-btn regia-btn--outline" id="btn-share-regia" style="margin:0">
-        <%= t("regia.share_regia") %>
-      </button>
-      <button type="button" class="regia-btn regia-btn--outline" id="btn-copy-regia" style="margin:0">
-        <%= t("regia.copy_link") %>
-      </button>
-    </div>
-  </div>
-
-  <div class="regia-preview">
     <% unless @stream_closed %>
-      <video id="regia-preview" playsinline muted autoplay></video>
+      <div class="regia-tool-group regia-tool-group--stream" role="group" aria-label="<%= t("regia.stream_controls_label") %>">
+        <span class="regia-tool-group__label" aria-hidden="true">&nbsp;</span>
+        <div class="regia-tool-group__btns">
+          <button type="button" class="regia-icon-btn" id="btn-toggle-preview" aria-label="<%= t("regia.preview_hide") %>" title="<%= t("regia.preview_hide") %>" aria-pressed="true">
+            <svg class="icon-fill icon-eye" viewBox="0 0 24 24" aria-hidden="true"><path d="M12 4.5C7 4.5 2.73 7.61 1 12c1.73 4.39 6 7.5 11 7.5s9.27-3.11 11-7.5c-1.73-4.39-6-7.5-11-7.5zM12 17c-2.76 0-5-2.24-5-5s2.24-5 5-5 5 2.24 5 5-2.24 5-5 5zm0-8c-1.66 0-3 1.34-3 3s1.34 3 3 3 3-1.34 3-3-1.34-3-3-3z"/></svg>
+            <svg class="icon-fill icon-eye-off" viewBox="0 0 24 24" aria-hidden="true"><path d="M12 7c2.76 0 5 2.24 5 5 0 .65-.13 1.26-.36 1.83l2.92 2.92c1.51-1.26 2.7-2.89 3.43-4.75-1.73-4.39-6-7.5-11-7.5-1.4 0-2.74.25-3.98.7l2.16 2.16C10.74 7.13 11.35 7 12 7zM2 4.27l2.28 2.28.46.46C3.08 8.3 1.78 10.02 1 12c1.73 4.39 6 7.5 11 7.5 1.55 0 3.03-.3 4.38-.84l.42.42L19.73 22 21 20.73 3.27 3 2 4.27zM7.53 9.8l1.55 1.55c-.05.21-.08.43-.08.65 0 1.66 1.34 3 3 3 .22 0 .44-.03.65-.08l1.55 1.55c-.67.33-1.41.53-2.2.53-2.76 0-5-2.24-5-5 0-.79.2-1.53.53-2.2zm4.31-.78 3.15 3.15.02-.16c0-1.66-1.34-3-3-3l-.17.01z"/></svg>
+          </button>
+          <button type="button" class="regia-icon-btn<%= " is-paused" if @session.paused? %>" id="btn-pause" aria-label="<%= @session.paused? ? t("regia.resume") : t("regia.pause") %>" title="<%= @session.paused? ? t("regia.resume") : t("regia.pause") %>">
+            <svg class="icon-fill icon-pause" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z"/></svg>
+            <svg class="icon-fill icon-play" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 5v14l11-7z"/></svg>
+          </button>
+          <button type="button" class="regia-icon-btn<%= " is-muted" if @session.audio_muted %>" id="btn-audio-mute" aria-label="<%= @session.audio_muted ? t("regia.unmute") : t("regia.mute") %>" title="<%= @session.audio_muted ? t("regia.unmute") : t("regia.mute") %>">
+            <svg class="icon-fill icon-mic" viewBox="0 0 24 24" aria-hidden="true"><path d="M12 14c1.66 0 3-1.34 3-3V5c0-1.66-1.34-3-3-3S9 3.34 9 5v6c0 1.66 1.34 3 3 3zm5-3c0 2.76-2.24 5-5 5s-5-2.24-5-5H5c0 3.53 2.61 6.43 6 6.92V21h2v-3.08c3.39-.49 6-3.39 6-6.92h-2z"/></svg>
+            <svg class="icon-fill icon-mic-off" viewBox="0 0 24 24" aria-hidden="true"><path d="M19 11h-1.7c0 .74-.16 1.43-.43 2.05l1.23 1.23c.56-.98.9-2.09.9-3.28zm-4.02.17c0-.06.02-.11.02-.17V5c0-1.66-1.34-3-3-3S9 3.34 9 5v.18l5.98 5.99zM4.27 3L3 4.27l6.01 6.01V11c0 1.66 1.33 3 2.99 3 .22 0 .44-.03.65-.08l1.66 1.66c-.71.33-1.5.52-2.31.52-2.76 0-5.3-2.1-5.3-5.1H5c0 3.41 2.72 6.23 6 6.72V21h2v-3.28c.91-.13 1.77-.45 2.54-.9L19.73 21 21 19.73 4.27 3z"/></svg>
+          </button>
+          <button type="button" class="regia-icon-btn regia-icon-btn--danger" id="btn-stop" aria-label="<%= t("regia.stop") %>" title="<%= t("regia.stop") %>">
+            <svg class="icon-fill" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 6h12v12H6z"/></svg>
+          </button>
+        </div>
+      </div>
     <% end %>
-    <div id="regia-preview-placeholder" class="regia-preview__placeholder">
-      <%= @stream_closed ? t("regia.preview_ended") : t("regia.preview_waiting") %>
+  </nav>
+
+  <section class="regia-preview-wrap" id="regia-preview-wrap">
+    <div class="regia-preview" id="regia-preview-box">
+      <% unless @stream_closed %>
+        <video id="regia-preview" playsinline muted autoplay></video>
+      <% end %>
+      <div id="regia-preview-placeholder" class="regia-preview__placeholder">
+        <%= @stream_closed ? t("regia.preview_ended") : t("regia.preview_waiting") %>
+      </div>
     </div>
-  </div>
+  </section>
 
   <section class="regia-scoreboard">
     <%= render regia_board_partial(@match) %>
   </section>
 
   <% unless @stream_closed %>
-    <button type="button" class="regia-btn regia-btn--outline" id="btn-pause"><%= @session.paused? ? t("regia.resume") : t("regia.pause") %></button>
-    <button type="button" class="regia-btn regia-btn--outline<%= @session.audio_muted ? ' is-muted' : '' %>" id="btn-audio-mute"><%= @session.audio_muted ? t("regia.unmute") : t("regia.mute") %></button>
-    <button type="button" class="regia-btn regia-btn--danger" id="btn-stop"><%= t("regia.stop") %></button>
+    <section class="regia-telemetry" id="regia-telemetry" aria-label="<%= t("regia.telemetry.label") %>">
+      <div class="regia-telemetry__row">
+        <span class="regia-chip" id="tel-battery" title="<%= t("regia.telemetry.battery") %>">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M16 4h-1V3h-6v1H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 16H8V6h8v14z"/></svg>
+          <span class="regia-chip__label"><%= t("regia.telemetry.battery") %></span>
+          <span class="regia-chip__value">—</span>
+        </span>
+        <span class="regia-chip" id="tel-network" title="<%= t("regia.telemetry.network") %>">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M1 9l2 2c4.97-4.97 13.03-4.97 18 0l2-2C16.93 2.93 7.08 2.93 1 9zm8 8l3 3 3-3c-1.65-1.66-4.34-1.66-6 0zm-4-4l2 2c2.76-2.76 7.24-2.76 10 0l2-2C15.14 9.14 8.87 9.14 5 13z"/></svg>
+          <span class="regia-chip__label"><%= t("regia.telemetry.network") %></span>
+          <span class="regia-chip__value">—</span>
+        </span>
+        <button type="button" class="regia-chip regia-chip--action" id="tel-bitrate" aria-expanded="false" aria-controls="regia-quality" title="<%= t("regia.telemetry.bitrate_tap") %>">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M3 13h2v-2H3v2zm4 4h2v-6H7v6zm4 4h2V7h-2v14zm4-8h2V9h-2v4zm4-4h2V5h-2v4z"/></svg>
+          <span class="regia-chip__label"><%= t("regia.telemetry.bitrate") %></span>
+          <span class="regia-chip__value">—</span>
+          <span class="regia-chip__hint" hidden></span>
+        </button>
+        <span class="regia-chip" id="tel-fps" title="<%= t("regia.telemetry.fps") %>">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M17 10.5V7c0-.55-.45-1-1-1H4c-.55 0-1 .45-1 1v10c0 .55.45 1 1 1h12c.55 0 1-.45 1-1v-3.5l4 4v-11l-4 4z"/></svg>
+          <span class="regia-chip__label"><%= t("regia.telemetry.fps") %></span>
+          <span class="regia-chip__value">—</span>
+        </span>
+        <span class="regia-chip" id="tel-thermal" title="<%= t("regia.telemetry.thermal") %>">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M15 13V5c0-1.66-1.34-3-3-3S9 3.34 9 5v8c-1.21.91-2 2.37-2 4 0 2.76 2.24 5 5 5s5-2.24 5-5c0-1.63-.79-3.09-2-4zm-3 8c-1.66 0-3-1.34-3-3 0-1.19.7-2.23 1.71-2.72L11 14.73V5c0-.55.45-1 1-1s1 .45 1 1v9.73l.29.18C14.3 15.77 15 16.81 15 18c0 1.66-1.34 3-3 3z"/></svg>
+          <span class="regia-chip__label"><%= t("regia.telemetry.thermal") %></span>
+          <span class="regia-chip__value">—</span>
+        </span>
+      </div>
+      <div class="regia-quality" id="regia-quality" hidden>
+        <p class="regia-quality__hint"><%= t("regia.min_quality.recommend") %></p>
+        <label for="min-quality"><%= t("regia.min_quality.label") %></label>
+        <select id="min-quality" title="<%= t("regia.min_quality.hint") %>">
+          <% Sessions::SelectQuality.allowed_min_ids(@session.quality_preset).each do |id| %>
+            <option value="<%= id %>" <%= "selected" if @session.min_quality_preset == id %>>
+              <%= id == Sessions::SelectQuality::AUTO_ID ? t("regia.min_quality.auto") : Sessions::SelectQuality.display_name(id) %>
+            </option>
+          <% end %>
+        </select>
+      </div>
+      <p class="regia-telemetry__meta" id="tel-meta"><%= t("regia.telemetry.waiting") %></p>
+    </section>
   <% end %>
 </div>
 
@@ -97,4 +165,4 @@
   </div>
 </div>
 
-<script src="/regia.js?v=9"></script>
+<script src="/regia.js?v=19"></script>

backend/config/environments/development.rb

@@ -62,8 +62,8 @@ Rails.application.configure do
   # Annotate rendered view with file names.
   config.action_view.annotate_rendered_view_with_filenames = true
 
-  # Uncomment if you wish to allow Action Cable access from any origin.
-  # config.action_cable.disable_request_forgery_protection = true
+  # Permette Action Cable dall'emulatore Android (10.0.2.2) e da altri host locali.
+  config.action_cable.disable_request_forgery_protection = true
 
   # Raise error when a before_action's only/except options reference missing actions.
   config.action_controller.raise_on_missing_callback_actions = true

backend/config/locales/app.de.yml

@@ -432,18 +432,53 @@ de:
       paused: Pausiert
       live: Live
       waiting: Wartet
-    live_share_label: "Live-Link (Zuschauer)"
+    live_share_label: Live
     share_live: Livestream teilen
+    share_action: Teilen
     copy_link: Link kopieren
-    regia_share_label: "Regie-Link (Punktestand)"
+    copy_action: Kopieren
+    copy_live: Live kopieren
+    copy_regia: Regie kopieren
+    links_nav: Schnellaktionen
+    regia_share_label: Regie
+    stream_controls_label: Live
     share_regia: Regie-Link teilen
     preview_ended: Livestream beendet
     preview_waiting: Vorschau wartet auf Signal…
+    preview_hide: Vorschau ausblenden
+    preview_show: Vorschau anzeigen
+    preview_off_hint: Vorschau aus · kein Video-Download
     pause: Pausieren
     resume: Livestream fortsetzen
     mute: Audio stummschalten
     unmute: Audio einschalten
     stop: Livestream beenden
+    min_quality:
+      label: Minimale Übertragungsqualität
+      summary: Qualität
+      hint: Der Encoder fällt nicht unter dieses Niveau. Automatisch passt die Bitrate an, um Aussetzer zu reduzieren.
+      recommend: "Automatisch wird empfohlen: passt sich an Netz und Telefon an, ohne das Maximum zu erzwingen."
+      auto: Automatisch
+    telemetry:
+      label: Telefon
+      waiting: Warte auf das Telefon…
+      stale: Telefon antwortet nicht
+      just_now: jetzt
+      seconds_ago: "vor %{n}s"
+      publisher_on: RTMP ok
+      publisher_off: RTMP fehlt
+      battery: Akku
+      network: Netz
+      bitrate: Bitrate
+      bitrate_max: "max %{n}"
+      bitrate_title: "%{current} Mbps aktuell · max. %{target} Mbps"
+      bitrate_tap: Tippen, um die Mindestqualität festzulegen
+      fps: FPS
+      thermal: Temp.
+      thermal_nominal: OK
+      thermal_fair: Warm
+      thermal_serious: Heiß
+      thermal_critical: Kritisch
     modal:
       set_won_title: Satz gewonnen
       confirm: Satz beenden
@@ -491,6 +526,8 @@ de:
       copy_prompt: "Link kopieren:"
       share_regia_text: "Öffne diesen Link, um den Live-Spielstand zu verwalten:"
       share_live_text: "Sieh dir die Übertragung auf Match Live TV an:"
+      min_quality_updated: Mindestqualität aktualisiert
+      min_quality_error: Fehler beim Aktualisieren der Mindestqualität
   recordings:
     archive:
       back_prefix: "←"

backend/config/locales/app.en.yml

@@ -427,18 +427,53 @@ en:
       paused: Paused
       live: Live
       waiting: Waiting
-    live_share_label: "Live link (viewers)"
+    live_share_label: Live
     share_live: Share live link
+    share_action: Share
     copy_link: Copy link
-    regia_share_label: "Control room link (score)"
+    copy_action: Copy
+    copy_live: Copy live
+    copy_regia: Copy room
+    links_nav: Quick actions
+    regia_share_label: Control
+    stream_controls_label: Live
     share_regia: Share control room link
     preview_ended: Stream ended
     preview_waiting: Waiting for signal…
+    preview_hide: Hide preview
+    preview_show: Show preview
+    preview_off_hint: Preview off · no video download
     pause: Pause stream
     resume: Resume stream
     mute: Mute audio
     unmute: Unmute audio
     stop: End stream
+    min_quality:
+      label: Minimum streaming quality
+      summary: Quality
+      hint: The encoder will not go below this level. Automatic adapts bitrate to reduce stalls.
+      recommend: "Automatic is recommended: it adapts to the network and the phone, without forcing maximum quality."
+      auto: Automatic
+    telemetry:
+      label: Phone
+      waiting: Waiting for the phone…
+      stale: Phone not responding
+      just_now: now
+      seconds_ago: "%{n}s ago"
+      publisher_on: RTMP ok
+      publisher_off: RTMP down
+      battery: Battery
+      network: Network
+      bitrate: Bitrate
+      bitrate_max: "max %{n}"
+      bitrate_title: "%{current} Mbps current · max %{target} Mbps"
+      bitrate_tap: Tap to set the minimum quality
+      fps: FPS
+      thermal: Temp.
+      thermal_nominal: OK
+      thermal_fair: Warm
+      thermal_serious: Hot
+      thermal_critical: Critical
     modal:
       set_won_title: Set won
       confirm: Close set
@@ -486,6 +521,8 @@ en:
       copy_prompt: "Copy the link:"
       share_regia_text: "Open this link to manage the live score:"
       share_live_text: "Watch the live stream on Match Live TV:"
+      min_quality_updated: Minimum quality updated
+      min_quality_error: Error updating minimum quality
   recordings:
     archive:
       back_prefix: "←"

backend/config/locales/app.es.yml

@@ -432,18 +432,53 @@ es:
       paused: En pausa
       live: En directo
       waiting: En espera
-    live_share_label: "Enlace del directo (espectadores)"
+    live_share_label: Directo
     share_live: Compartir directo
+    share_action: Compartir
     copy_link: Copiar enlace
-    regia_share_label: "Enlace de control (marcador)"
+    copy_action: Copiar
+    copy_live: Copiar directo
+    copy_regia: Copiar control
+    links_nav: Acciones rápidas
+    regia_share_label: Control
+    stream_controls_label: Live
     share_regia: Compartir enlace de control
     preview_ended: Directo finalizado
     preview_waiting: Vista previa a la espera de señal…
+    preview_hide: Ocultar vista previa
+    preview_show: Mostrar vista previa
+    preview_off_hint: Vista previa apagada · sin descarga de vídeo
     pause: Pausar directo
     resume: Reanudar directo
     mute: Silenciar audio
     unmute: Reactivar audio
     stop: Finalizar directo
+    min_quality:
+      label: Calidad mínima de transmisión
+      summary: Calidad
+      hint: El encoder no baja de este nivel. Automática adapta el bitrate para reducir los cortes.
+      recommend: "Se recomienda Automática: se adapta a la red y al teléfono, sin forzar el máximo."
+      auto: Automática
+    telemetry:
+      label: Teléfono
+      waiting: Esperando al teléfono…
+      stale: El teléfono no responde
+      just_now: ahora
+      seconds_ago: "hace %{n}s"
+      publisher_on: RTMP ok
+      publisher_off: RTMP ausente
+      battery: Batería
+      network: Red
+      bitrate: Bitrate
+      bitrate_max: "máx %{n}"
+      bitrate_title: "%{current} Mbps actuales · máximo %{target} Mbps"
+      bitrate_tap: Toca para definir la calidad mínima
+      fps: FPS
+      thermal: Temp.
+      thermal_nominal: OK
+      thermal_fair: Caliente
+      thermal_serious: Muy caliente
+      thermal_critical: Crítica
     modal:
       set_won_title: Set ganado
       confirm: Cerrar set
@@ -491,6 +526,8 @@ es:
       copy_prompt: "Copia el enlace:"
       share_regia_text: "Abre este enlace para gestionar el marcador en directo:"
       share_live_text: "Mira la retransmisión en Match Live TV:"
+      min_quality_updated: Calidad mínima actualizada
+      min_quality_error: Error al actualizar la calidad mínima
   recordings:
     archive:
       back_prefix: "←"

backend/config/locales/app.fr.yml

@@ -432,18 +432,53 @@ fr:
       paused: En pause
       live: En direct
       waiting: En attente
-    live_share_label: "Lien direct (spectateurs)"
+    live_share_label: Direct
     share_live: Partager le direct
+    share_action: Partager
     copy_link: Copier le lien
-    regia_share_label: "Lien régie (score)"
+    copy_action: Copier
+    copy_live: Copier live
+    copy_regia: Copier régie
+    links_nav: Actions rapides
+    regia_share_label: Régie
+    stream_controls_label: Live
     share_regia: Partager le lien régie
     preview_ended: Direct terminé
     preview_waiting: Aperçu en attente du signal…
+    preview_hide: Masquer l'aperçu
+    preview_show: Afficher l'aperçu
+    preview_off_hint: Aperçu désactivé · aucun téléchargement vidéo
     pause: Mettre en pause
     resume: Reprendre le direct
     mute: Couper l'audio
     unmute: Réactiver l'audio
     stop: Terminer le direct
+    min_quality:
+      label: Qualité minimale de transmission
+      summary: Qualité
+      hint: L'encodeur ne descend pas en dessous de ce niveau. Automatique adapte le débit pour limiter les coupures.
+      recommend: "Automatique est conseillé : s'adapte au réseau et au téléphone, sans forcer le maximum."
+      auto: Automatique
+    telemetry:
+      label: Téléphone
+      waiting: En attente du téléphone…
+      stale: Téléphone sans réponse
+      just_now: maintenant
+      seconds_ago: "il y a %{n}s"
+      publisher_on: RTMP ok
+      publisher_off: RTMP absent
+      battery: Batterie
+      network: Réseau
+      bitrate: Débit
+      bitrate_max: "max %{n}"
+      bitrate_title: "%{current} Mbps actuels · max %{target} Mbps"
+      bitrate_tap: Touchez pour définir la qualité minimale
+      fps: FPS
+      thermal: Temp.
+      thermal_nominal: OK
+      thermal_fair: Chaude
+      thermal_serious: Très chaude
+      thermal_critical: Critique
     modal:
       set_won_title: Set gagné
       confirm: Terminer le set
@@ -491,6 +526,8 @@ fr:
       copy_prompt: "Copiez le lien :"
       share_regia_text: "Ouvrez ce lien pour gérer le score du direct :"
       share_live_text: "Regardez le direct sur Match Live TV :"
+      min_quality_updated: Qualité minimale mise à jour
+      min_quality_error: Erreur de mise à jour de la qualité minimale
   recordings:
     archive:
       back_prefix: "←"

backend/config/locales/app.it.yml

@@ -427,18 +427,53 @@ it:
       paused: In pausa
       live: In onda
       waiting: In attesa
-    live_share_label: "Link diretta (spettatori)"
+    live_share_label: Diretta
     share_live: Condividi diretta
+    share_action: Condividi
     copy_link: Copia link
-    regia_share_label: "Link regia (punteggio)"
+    copy_action: Copia
+    copy_live: Copia live
+    copy_regia: Copia regia
+    links_nav: Azioni rapide
+    regia_share_label: Regia
+    stream_controls_label: Live
     share_regia: Condividi link regia
     preview_ended: Diretta terminata
     preview_waiting: Anteprima in attesa del segnale…
+    preview_hide: Nascondi anteprima
+    preview_show: Mostra anteprima
+    preview_off_hint: Anteprima spenta · nessun download video
     pause: Metti in pausa
     resume: Riprendi diretta
     mute: Silenzia audio
     unmute: Riattiva audio
     stop: Chiudi diretta
+    min_quality:
+      label: Qualità minima di trasmissione
+      summary: Qualità
+      hint: L'encoder non scende sotto questo livello. Automatica adatta il bitrate per ridurre i salti.
+      recommend: "Consigliata Automatica: si adatta alla rete e al telefono, senza forzare il massimo."
+      auto: Automatica
+    telemetry:
+      label: Telefono
+      waiting: In attesa del telefono…
+      stale: Telefono non risponde
+      just_now: ora
+      seconds_ago: "%{n}s fa"
+      publisher_on: RTMP ok
+      publisher_off: RTMP assente
+      battery: Batteria
+      network: Rete
+      bitrate: Bitrate
+      bitrate_max: "max %{n}"
+      bitrate_title: "%{current} Mbps attuali · massimo %{target} Mbps"
+      bitrate_tap: Tocca per impostare la qualità minima
+      fps: FPS
+      thermal: Temp.
+      thermal_nominal: OK
+      thermal_fair: Calda
+      thermal_serious: Molto calda
+      thermal_critical: Critica
     modal:
       set_won_title: Set vinto
       confirm: Chiudi set
@@ -486,6 +521,8 @@ it:
       copy_prompt: "Copia il link:"
       share_regia_text: "Apri questo link per gestire il punteggio della diretta:"
       share_live_text: "Guarda la diretta su Match Live TV:"
+      min_quality_updated: Qualità minima aggiornata
+      min_quality_error: Errore aggiornamento qualità minima
   recordings:
     archive:
       back_prefix: "←"

backend/config/routes.rb

@@ -56,6 +56,7 @@ Rails.application.routes.draw do
           post :claim_pairing
           post :regia_link
           post :network_test
+          patch :min_quality
           get :youtube_stats
         end
       end
@@ -154,6 +155,7 @@ Rails.application.routes.draw do
   post "regia/:token/resume", to: "public/regia#resume", as: :public_regia_resume
   post "regia/:token/audio_mute", to: "public/regia#audio_mute", as: :public_regia_audio_mute
   post "regia/:token/stop", to: "public/regia#stop", as: :public_regia_stop
+  patch "regia/:token/min_quality", to: "public/regia#min_quality", as: :public_regia_min_quality
 
   root to: "public/pages#home"
   get "sitemap.xml", to: "public/sitemap#show", defaults: { format: :xml }

backend/db/migrate/20260813170000_add_min_quality_preset_to_stream_sessions.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddMinQualityPresetToStreamSessions < ActiveRecord::Migration[7.2]
+  def change
+    add_column :stream_sessions, :min_quality_preset, :string, default: "auto", null: false
+  end
+end

backend/db/migrate/20260813184100_add_thermal_state_to_device_states.rb

@@ -0,0 +1,5 @@
+class AddThermalStateToDeviceStates < ActiveRecord::Migration[7.2]
+  def change
+    add_column :device_states, :thermal_state, :string
+  end
+end

backend/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2026_08_12_220000) do
+ActiveRecord::Schema[7.2].define(version: 2026_08_13_184100) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -138,6 +138,7 @@ ActiveRecord::Schema[7.2].define(version: 2026_08_12_220000) do
     t.datetime "last_seen_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "thermal_state"
     t.index ["stream_session_id", "device_role"], name: "index_device_states_on_stream_session_id_and_device_role", unique: true
     t.index ["stream_session_id"], name: "index_device_states_on_stream_session_id"
   end
@@ -305,6 +306,7 @@ ActiveRecord::Schema[7.2].define(version: 2026_08_12_220000) do
     t.datetime "regia_token_expires_at"
     t.uuid "stream_node_id"
     t.boolean "audio_muted", default: false, null: false
+    t.string "min_quality_preset", default: "auto", null: false
     t.index ["match_id"], name: "index_stream_sessions_on_match_id"
     t.index ["publish_token"], name: "index_stream_sessions_on_publish_token", unique: true
     t.index ["regia_token_digest"], name: "index_stream_sessions_on_regia_token_digest", unique: true

backend/public/regia.css

@@ -4,6 +4,8 @@
   --regia-surface: #14141c;
   --regia-red: #e53935;
   --regia-yellow: #f9a825;
+  --regia-green: #43a047;
+  --regia-orange: #fb8c00;
   --regia-text: #f5f5f5;
   --regia-muted: #9ca3af;
   --regia-safe-bottom: env(safe-area-inset-bottom, 0px);
@@ -22,37 +24,176 @@
 .regia-page {
   max-width: 480px;
   margin: 0 auto;
-  padding: 12px 16px calc(24px + var(--regia-safe-bottom));
+  padding: 8px 12px calc(12px + var(--regia-safe-bottom));
+}
+
+.regia-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 8px;
+}
+
+.regia-header__text {
+  min-width: 0;
+  flex: 1;
 }
 
 .regia-header h1 {
   margin: 0;
-  font-size: 1.1rem;
+  font-size: 1rem;
   font-weight: 700;
+  line-height: 1.25;
 }
 
 .regia-header p {
-  margin: 4px 0 0;
-  font-size: 0.85rem;
+  margin: 2px 0 0;
+  font-size: 0.78rem;
   color: var(--regia-muted);
 }
 
 .regia-badge {
   display: inline-block;
-  margin-top: 8px;
-  padding: 4px 10px;
+  margin-top: 0;
+  padding: 3px 8px;
   border-radius: 999px;
-  font-size: 0.7rem;
+  font-size: 0.65rem;
   font-weight: 700;
   text-transform: uppercase;
+  flex-shrink: 0;
 }
 
 .regia-badge--live { background: #2e7d32; color: #fff; }
 .regia-badge--wait { background: #444; color: #ddd; }
 .regia-badge--ended { background: #374151; color: #ddd; }
 
+.regia-toolbar {
+  margin: 8px 0 6px;
+  display: flex;
+  align-items: flex-end;
+  gap: 8px;
+}
+
+.regia-tool-group {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 3px;
+  min-width: 0;
+}
+
+.regia-tool-group__label {
+  font-size: 0.62rem;
+  font-weight: 700;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+  color: var(--regia-muted);
+  line-height: 1;
+  white-space: nowrap;
+}
+
+.regia-tool-group__btns {
+  display: flex;
+  gap: 3px;
+}
+
+.regia-tool-group--stream {
+  margin-left: auto;
+  padding-left: 8px;
+  border-left: 1px solid #333;
+}
+
+.regia-icon-btn {
+  flex: none;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 40px;
+  height: 40px;
+  margin: 0;
+  padding: 0;
+  border: 1px solid #333;
+  border-radius: 10px;
+  background: #16161f;
+  color: var(--regia-text);
+  cursor: pointer;
+  touch-action: manipulation;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.regia-icon-btn svg {
+  width: 20px;
+  height: 20px;
+  pointer-events: none;
+}
+
+.regia-icon-btn svg.icon-fill {
+  fill: currentColor;
+}
+
+.regia-icon-btn svg.icon-outline {
+  fill: none;
+  stroke: currentColor;
+  stroke-width: 2;
+  stroke-linecap: round;
+  stroke-linejoin: round;
+}
+
+.regia-icon-btn .icon-eye-off,
+.regia-icon-btn .icon-play,
+.regia-icon-btn .icon-mic-off {
+  display: none;
+}
+
+.regia-icon-btn.is-off .icon-eye {
+  display: none;
+}
+
+.regia-icon-btn.is-off .icon-eye-off {
+  display: block;
+}
+
+.regia-icon-btn.is-paused .icon-pause {
+  display: none;
+}
+
+.regia-icon-btn.is-paused .icon-play {
+  display: block;
+}
+
+.regia-icon-btn.is-muted .icon-mic {
+  display: none;
+}
+
+.regia-icon-btn.is-muted .icon-mic-off {
+  display: block;
+}
+
+.regia-icon-btn:active { transform: scale(0.96); }
+
+.regia-icon-btn.is-off,
+.regia-icon-btn.is-muted {
+  color: var(--regia-yellow);
+  border-color: #5a4a1a;
+}
+
+.regia-icon-btn--danger {
+  color: var(--regia-red);
+  border-color: #7a2a28;
+}
+
+.regia-preview-wrap {
+  margin: 6px 0 10px;
+}
+
+.regia-preview-wrap.is-off {
+  margin: 0;
+  height: 0;
+  overflow: hidden;
+}
+
 .regia-preview {
-  margin: 14px 0;
+  margin: 0;
   border-radius: 12px;
   overflow: hidden;
   background: #000;
@@ -90,29 +231,29 @@
 .regia-scoreboard {
   background: var(--regia-surface);
   border-radius: 12px;
-  padding: 16px;
-  margin-bottom: 12px;
+  padding: 10px 12px;
+  margin-bottom: 8px;
 }
 
 .regia-sets {
   text-align: center;
-  font-size: 0.82rem;
+  font-size: 0.78rem;
   color: var(--regia-muted);
-  margin: 0 0 8px;
+  margin: 0 0 4px;
 }
 
 .regia-score-line {
   text-align: center;
-  font-size: 1.5rem;
+  font-size: 1.2rem;
   font-weight: 800;
   margin: 0;
 }
 
 .regia-partials {
   text-align: center;
-  font-size: 0.78rem;
+  font-size: 0.75rem;
   color: var(--regia-muted);
-  margin: 8px 0 0;
+  margin: 4px 0 0;
 }
 
 .regia-team-row {
@@ -120,7 +261,7 @@
   grid-template-columns: 1fr auto 1fr;
   gap: 8px;
   align-items: center;
-  margin-top: 16px;
+  margin-top: 8px;
 }
 
 .regia-team-name {
@@ -131,7 +272,7 @@
 }
 
 .regia-points {
-  font-size: 2rem;
+  font-size: 1.55rem;
   font-weight: 800;
   text-align: center;
 }
@@ -146,7 +287,7 @@
 .regia-btn {
   border: none;
   border-radius: 10px;
-  padding: 16px 12px;
+  padding: 10px 8px;
   font-size: 1rem;
   font-weight: 700;
   cursor: pointer;
@@ -156,8 +297,8 @@
 
 .regia-btn:active { transform: scale(0.98); }
 .regia-btn--point { background: var(--regia-red); color: #fff; }
-.regia-btn--minus { background: #2a2a36; color: #fff; font-size: 0.9rem; padding: 12px; }
-.regia-btn--yellow { background: var(--regia-yellow); color: #111; width: 100%; margin-top: 10px; }
+.regia-btn--minus { background: #2a2a36; color: #fff; font-size: 0.9rem; padding: 8px; }
+.regia-btn--yellow { background: var(--regia-yellow); color: #111; width: 100%; margin-top: 8px; padding: 12px; }
 .regia-btn--outline {
   background: transparent;
   border: 1px solid #444;
@@ -177,26 +318,6 @@
   margin-top: 8px;
 }
 
-.regia-share-group {
-  margin: 12px 0;
-}
-
-.regia-share-label {
-  margin: 0 0 6px;
-  font-size: 0.72rem;
-  font-weight: 600;
-  letter-spacing: 0.04em;
-  text-transform: uppercase;
-  color: var(--regia-muted);
-}
-
-.regia-share {
-  display: flex;
-  gap: 8px;
-}
-
-.regia-share .regia-btn { flex: 1; font-size: 0.9rem; padding: 12px; }
-
 .regia-toast {
   position: fixed;
   bottom: calc(16px + var(--regia-safe-bottom));
@@ -244,7 +365,7 @@
   text-align: center;
   color: var(--regia-muted);
   font-size: 0.72rem;
-  padding-top: 24px;
+  padding-top: 8px;
 }
 
 .regia-clock-line {
@@ -259,3 +380,128 @@
   gap: 8px;
   margin-top: 12px;
 }
+
+.regia-quality {
+  margin: 6px 0 0;
+  padding: 8px 10px 10px;
+  background: var(--regia-surface);
+  border-radius: 10px;
+}
+
+.regia-quality[hidden] { display: none !important; }
+
+.regia-quality__hint {
+  margin: 0 0 8px;
+  font-size: 0.68rem;
+  line-height: 1.35;
+  color: var(--regia-muted);
+}
+
+.regia-quality label {
+  display: block;
+  font-size: 0.68rem;
+  color: var(--regia-muted);
+  margin: 0 0 4px;
+}
+
+.regia-quality select {
+  width: 100%;
+  background: #0a0a0e;
+  color: var(--regia-text);
+  border: 1px solid #2a2a35;
+  border-radius: 8px;
+  padding: 8px 10px;
+  font-size: 0.82rem;
+}
+
+.regia-telemetry {
+  margin-top: 8px;
+}
+
+.regia-telemetry__row {
+  display: grid;
+  grid-template-columns: repeat(5, minmax(0, 1fr));
+  gap: 4px;
+}
+
+.regia-chip {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
+  min-width: 0;
+  text-align: center;
+  padding: 6px 2px 5px;
+  border-radius: 8px;
+  background: var(--regia-surface);
+  color: var(--regia-text);
+  border: 1px solid transparent;
+}
+
+.regia-chip--action {
+  appearance: none;
+  -webkit-appearance: none;
+  font: inherit;
+  cursor: pointer;
+  width: 100%;
+}
+
+.regia-chip--action:focus-visible {
+  outline: 2px solid var(--regia-yellow);
+  outline-offset: 1px;
+}
+
+.regia-chip--action.is-open {
+  border-color: #3a3a48;
+}
+
+.regia-chip svg {
+  width: 14px;
+  height: 14px;
+  fill: currentColor;
+}
+
+.regia-chip__label {
+  font-size: 0.55rem;
+  font-weight: 700;
+  letter-spacing: 0.02em;
+  text-transform: uppercase;
+  color: var(--regia-muted);
+  line-height: 1;
+  white-space: nowrap;
+}
+
+.regia-chip__value {
+  font-size: 0.72rem;
+  font-weight: 800;
+  line-height: 1.15;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.regia-chip__hint {
+  font-size: 0.55rem;
+  font-weight: 600;
+  color: var(--regia-muted);
+  line-height: 1;
+  white-space: nowrap;
+}
+
+.regia-chip__hint[hidden] { display: none; }
+
+.regia-chip.is-ok { color: var(--regia-green); }
+.regia-chip.is-warn { color: var(--regia-orange); }
+.regia-chip.is-bad { color: var(--regia-red); }
+
+.regia-telemetry__meta {
+  margin: 4px 0 0;
+  font-size: 0.65rem;
+  color: var(--regia-muted);
+  text-align: center;
+}
+
+.regia-telemetry.is-stale .regia-telemetry__meta {
+  color: var(--regia-yellow);
+}

backend/public/regia.js

@@ -40,6 +40,9 @@
     shareLiveText: "Guarda la diretta su Match Live TV:",
     previewWaiting: "Anteprima in attesa del segnale…",
     streamEnded: "Diretta terminata",
+    previewHide: "Nascondi anteprima",
+    previewShow: "Mostra anteprima",
+    previewOffHint: "Anteprima spenta · nessun download video",
     resumeLabel: "Riprendi diretta",
     pauseLabel: "Metti in pausa",
     muteLabel: "Silenzia audio",
@@ -48,7 +51,23 @@
     pausedBadge: "In pausa",
     liveBadge: "In onda",
     waitingBadge: "In attesa",
-    subtitlePrefix: "Regia ·"
+    subtitlePrefix: "Regia ·",
+    minQualityUpdated: "Qualità minima aggiornata",
+    minQualityError: "Errore aggiornamento qualità minima",
+    minQualityAuto: "Automatica",
+    telemetryWaiting: "In attesa del telefono…",
+    telemetryStale: "Telefono non risponde",
+    telemetryJustNow: "ora",
+    telemetrySecondsAgo: "%{n}s fa",
+    telemetryPublisherOn: "RTMP ok",
+    telemetryPublisherOff: "RTMP assente",
+    telemetryThermalNominal: "OK",
+    telemetryThermalFair: "Calda",
+    telemetryThermalSerious: "Calda",
+    telemetryThermalCritical: "Critica",
+    telemetryBitrateMax: "max %{n}",
+    telemetryBitrateTitle: "%{current} Mbps attuali · massimo %{target} Mbps",
+    telemetryBitrateTap: "Tocca per impostare la qualità minima"
   };
 
   function loadI18n() {
@@ -83,6 +102,7 @@
     resumeUrl: root.dataset.resumeUrl,
     audioMuteUrl: root.dataset.audioMuteUrl,
     stopUrl: root.dataset.stopUrl,
+    minQualityUrl: root.dataset.minQualityUrl,
     cableUrl: root.dataset.cableUrl,
     hlsUrl: root.dataset.hlsUrl,
     homeName: root.dataset.homeName,
@@ -108,17 +128,30 @@
     modalCancel: document.getElementById("modal-cancel"),
     preview: document.getElementById("regia-preview"),
     previewPlaceholder: document.getElementById("regia-preview-placeholder"),
+    previewWrap: document.getElementById("regia-preview-wrap"),
+    btnTogglePreview: document.getElementById("btn-toggle-preview"),
     btnPause: document.getElementById("btn-pause"),
     btnAudioMute: document.getElementById("btn-audio-mute"),
-    subtitle: document.getElementById("regia-subtitle")
+    minQuality: document.getElementById("min-quality"),
+    subtitle: document.getElementById("regia-subtitle"),
+    telemetry: document.getElementById("regia-telemetry"),
+    telBattery: document.getElementById("tel-battery"),
+    telNetwork: document.getElementById("tel-network"),
+    telBitrate: document.getElementById("tel-bitrate"),
+    telFps: document.getElementById("tel-fps"),
+    telThermal: document.getElementById("tel-thermal"),
+    telMeta: document.getElementById("tel-meta"),
+    qualityPanel: document.getElementById("regia-quality")
   };
 
   let pendingAction = null;
   let hls = null;
   let previewStarted = false;
+  let previewWanted = true;
   let wasPausedPreview = false;
   let streamPaused = root.dataset.initialPaused === "true";
   let audioMuted = root.dataset.initialAudioMuted === "true";
+  const PREVIEW_PREF_KEY = "mltv-regia-preview";
 
   function hlsUrlFresh() {
     const sep = cfg.hlsUrl.includes("?") ? "&" : "?";
@@ -147,8 +180,43 @@
     }
   }
 
+  function readPreviewPref() {
+    try {
+      return localStorage.getItem(PREVIEW_PREF_KEY) !== "0";
+    } catch (_) {
+      return true;
+    }
+  }
+
+  function writePreviewPref(on) {
+    try {
+      localStorage.setItem(PREVIEW_PREF_KEY, on ? "1" : "0");
+    } catch (_) {}
+  }
+
+  function syncPreviewToggleUi() {
+    if (!els.previewWrap || !els.btnTogglePreview) return;
+    const label = previewWanted ? I18N.previewHide : I18N.previewShow;
+    els.previewWrap.classList.toggle("is-off", !previewWanted);
+    els.btnTogglePreview.classList.toggle("is-off", !previewWanted);
+    els.btnTogglePreview.setAttribute("aria-pressed", previewWanted ? "true" : "false");
+    els.btnTogglePreview.setAttribute("aria-label", label);
+    els.btnTogglePreview.title = previewWanted ? I18N.previewHide : I18N.previewOffHint;
+  }
+
+  function setPreviewWanted(on) {
+    previewWanted = !!on;
+    writePreviewPref(previewWanted);
+    syncPreviewToggleUi();
+    if (previewWanted) {
+      startPreview();
+    } else {
+      destroyPreview();
+    }
+  }
+
   function refreshPreviewForCover() {
-    if (!els.preview || !cfg.hlsUrl || cfg.streamClosed) return;
+    if (!els.preview || !cfg.hlsUrl || cfg.streamClosed || !previewWanted) return;
     destroyPreview();
     previewStarted = false;
     startPreview();
@@ -251,7 +319,10 @@
     if (!els.btnPause) return;
     const paused = !!(data.paused || data.status === "paused");
     streamPaused = paused;
-    els.btnPause.textContent = paused ? I18N.resumeLabel : I18N.pauseLabel;
+    const label = paused ? I18N.resumeLabel : I18N.pauseLabel;
+    els.btnPause.classList.toggle("is-paused", paused);
+    els.btnPause.setAttribute("aria-label", label);
+    els.btnPause.title = label;
   }
 
   function syncMuteButton(data) {
@@ -259,8 +330,10 @@
     if (typeof data.audio_muted === "boolean") {
       audioMuted = data.audio_muted;
     }
-    els.btnAudioMute.textContent = audioMuted ? I18N.unmuteLabel : I18N.muteLabel;
+    const label = audioMuted ? I18N.unmuteLabel : I18N.muteLabel;
     els.btnAudioMute.classList.toggle("is-muted", audioMuted);
+    els.btnAudioMute.setAttribute("aria-label", label);
+    els.btnAudioMute.title = label;
   }
 
   function setBadge(data) {
@@ -382,6 +455,11 @@
     }
 
     const paused = data.paused || data.status === "paused";
+    if (!previewWanted) {
+      destroyPreview();
+      wasPausedPreview = paused;
+      return;
+    }
     if (data.on_air) {
       if (!previewStarted) {
         startPreview();
@@ -400,6 +478,119 @@
     wasPausedPreview = paused;
   }
 
+  function mbpsNumber(bps) {
+    const n = Number(bps);
+    if (!n || n <= 0) return null;
+    const mbps = n >= 10_000 ? n / 1e6 : n / 1e3;
+    return mbps >= 10 ? mbps.toFixed(0) : mbps.toFixed(1);
+  }
+
+  function formatAge(iso) {
+    if (!iso) return null;
+    const then = Date.parse(iso);
+    if (!then) return null;
+    const secs = Math.max(0, Math.round((Date.now() - then) / 1000));
+    if (secs < 8) return I18N.telemetryJustNow;
+    return fillTemplate(I18N.telemetrySecondsAgo, { n: secs });
+  }
+
+  function setChip(el, text, level, hint) {
+    if (!el) return;
+    const valueEl = el.querySelector(".regia-chip__value") || el;
+    valueEl.textContent = text;
+    el.classList.toggle("is-ok", level === "ok");
+    el.classList.toggle("is-warn", level === "warn");
+    el.classList.toggle("is-bad", level === "bad");
+    const hintEl = el.querySelector(".regia-chip__hint");
+    if (hintEl) {
+      hintEl.textContent = hint || "";
+      hintEl.hidden = !hint;
+    }
+  }
+
+  function formatThermal(state) {
+    const key = String(state || "").toLowerCase();
+    if (key === "nominal") return { text: I18N.telemetryThermalNominal, level: "ok" };
+    if (key === "fair") return { text: I18N.telemetryThermalFair, level: "warn" };
+    if (key === "serious") return { text: I18N.telemetryThermalSerious, level: "bad" };
+    if (key === "critical") return { text: I18N.telemetryThermalCritical, level: "bad" };
+    return { text: "—", level: null };
+  }
+
+  function bitrateLevel(current, target, paused) {
+    if (paused || !current || current <= 0) return null;
+    if (target && target > 0) {
+      const ratio = current / target;
+      if (ratio >= 0.7) return "ok";
+      if (ratio >= 0.4) return "warn";
+      return "bad";
+    }
+    const mbps = current >= 10_000 ? current / 1e6 : current / 1e3;
+    if (mbps >= 2.5) return "ok";
+    if (mbps >= 1.5) return "warn";
+    return "bad";
+  }
+
+  function bitrateTitle(currentMbps, targetMbps) {
+    const tap = I18N.telemetryBitrateTap;
+    if (currentMbps && targetMbps) {
+      return `${fillTemplate(I18N.telemetryBitrateTitle, { current: currentMbps, target: targetMbps })} · ${tap}`;
+    }
+    if (currentMbps) return `${currentMbps} Mbps · ${tap}`;
+    return tap;
+  }
+
+  function syncTelemetry(data) {
+    if (!els.telemetry) return;
+    const tel = data.telemetry || {};
+    const battery = tel.battery;
+    const fps = tel.fps;
+    const bitrate = tel.bitrate;
+    const target = tel.target_bitrate || tel.targetBitrate;
+    const lastSeen = tel.last_seen_at || tel.lastSeenAt;
+    const ageSecs = lastSeen ? Math.max(0, Math.round((Date.now() - Date.parse(lastSeen)) / 1000)) : null;
+    const stale = ageSecs == null || ageSecs > 25;
+    const publishing = !!tel.publisher_online || !!tel.publisherOnline;
+
+    let battLevel = null;
+    let battText = "—";
+    if (battery != null && battery !== "") {
+      battText = `${battery}%`;
+      if (battery <= 15) battLevel = "bad";
+      else if (battery <= 25) battLevel = "warn";
+    }
+    setChip(els.telBattery, battText, battLevel);
+    setChip(els.telNetwork, tel.network || "—");
+
+    const currentMbps = mbpsNumber(bitrate);
+    const targetMbps = mbpsNumber(target);
+    const rateText = currentMbps || "—";
+    const rateHint = currentMbps && targetMbps
+      ? fillTemplate(I18N.telemetryBitrateMax, { n: targetMbps })
+      : null;
+    if (els.telBitrate) els.telBitrate.title = bitrateTitle(currentMbps, targetMbps);
+    setChip(els.telBitrate, rateText, bitrateLevel(Number(bitrate), Number(target), data.paused), rateHint);
+
+    let fpsLevel = null;
+    if (fps != null && fps !== "" && Number(fps) > 0 && Number(fps) < 20) fpsLevel = "warn";
+    setChip(els.telFps, fps && Number(fps) > 0 ? String(fps) : "—", fpsLevel);
+
+    const thermal = formatThermal(tel.thermal_state || tel.thermalState);
+    setChip(els.telThermal, thermal.text, thermal.level);
+
+    els.telemetry.classList.toggle("is-stale", stale && !data.paused && !data.stream_closed);
+    if (!els.telMeta) return;
+    if (stale && !lastSeen) {
+      els.telMeta.textContent = I18N.telemetryWaiting;
+      return;
+    }
+    const parts = [publishing ? I18N.telemetryPublisherOn : I18N.telemetryPublisherOff];
+    const age = formatAge(lastSeen);
+    if (age) parts.push(age);
+    if (stale && !data.paused && !data.stream_closed) parts.push(I18N.telemetryStale);
+    els.telMeta.textContent = parts.join(" · ");
+  }
+
   async function pollStatus() {
     try {
       const res = await fetch(cfg.statusUrl, { headers: { Accept: "application/json" } });
@@ -407,6 +598,8 @@
       const data = await res.json();
       applyScorePayload(data);
       setBadge(data);
+      syncMinQuality(data);
+      syncTelemetry(data);
       syncPreviewFromStatus(data);
     } catch (_) {}
   }
@@ -419,7 +612,7 @@
   }
 
   function startPreview() {
-    if (cfg.streamClosed || !els.preview || !cfg.hlsUrl || previewStarted) return;
+    if (cfg.streamClosed || !previewWanted || !els.preview || !cfg.hlsUrl || previewStarted) return;
 
     previewStarted = true;
     const url = hlsUrlFresh();
@@ -472,6 +665,8 @@
     const wasPaused = streamPaused;
     applyScorePayload(data);
     setBadge(data);
+    syncMinQuality(data);
+    syncTelemetry(data);
     syncPreviewFromStatus(data);
     toast(wasPaused ? I18N.resumed : I18N.pausedCover);
   }
@@ -510,6 +705,70 @@
   els.btnAudioMute?.addEventListener("click", () => toggleMuteAudio().catch((e) => toast(e.message)));
   document.getElementById("btn-stop")?.addEventListener("click", () => stopStream().catch((e) => toast(e.message)));
 
+  let minQualityBusy = false;
+
+  function setQualityPanelOpen(open) {
+    if (!els.qualityPanel || !els.telBitrate) return;
+    els.qualityPanel.hidden = !open;
+    els.telBitrate.setAttribute("aria-expanded", open ? "true" : "false");
+    els.telBitrate.classList.toggle("is-open", open);
+    if (open && els.minQuality) {
+      window.requestAnimationFrame(() => els.minQuality.focus());
+    }
+  }
+
+  function syncMinQuality(data) {
+    if (!els.minQuality || minQualityBusy) return;
+    const value = data.min_quality_preset || "auto";
+    if (els.minQuality.value !== value) els.minQuality.value = value;
+  }
+
+  async function setMinQuality(preset) {
+    if (!cfg.minQualityUrl) return;
+    minQualityBusy = true;
+    try {
+      const res = await fetch(cfg.minQualityUrl, {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json", Accept: "application/json" },
+        body: JSON.stringify({ min_quality_preset: preset })
+      });
+      const data = await res.json().catch(() => ({}));
+      if (!res.ok) throw new Error(data.error || I18N.minQualityError);
+      minQualityBusy = false;
+      syncMinQuality(data);
+      toast(I18N.minQualityUpdated);
+    } catch (e) {
+      toast(e.message || I18N.minQualityError);
+    } finally {
+      minQualityBusy = false;
+    }
+  }
+
+  els.minQuality?.addEventListener("change", () => {
+    setMinQuality(els.minQuality.value);
+  });
+
+  els.telBitrate?.addEventListener("click", (e) => {
+    e.stopPropagation();
+    const opening = !!(els.qualityPanel && els.qualityPanel.hidden);
+    setQualityPanelOpen(opening);
+  });
+
+  document.addEventListener("click", (e) => {
+    if (!els.qualityPanel || els.qualityPanel.hidden) return;
+    if (els.qualityPanel.contains(e.target) || els.telBitrate?.contains(e.target)) return;
+    setQualityPanelOpen(false);
+  });
+
+  document.addEventListener("keydown", (e) => {
+    if (e.key === "Escape") setQualityPanelOpen(false);
+  });
+
+  els.btnTogglePreview?.addEventListener("click", () => setPreviewWanted(!previewWanted));
+  previewWanted = readPreviewPref();
+  syncPreviewToggleUi();
+  if (!previewWanted) destroyPreview();
+
   async function shareLink(url, title, text) {
     if (!url) {
       toast(I18N.linkUnavailable);

backend/spec/requests/public/regia_spec.rb

@@ -12,7 +12,18 @@ RSpec.describe "Public regia", type: :request do
     get public_regia_path(token)
     expect(response).to have_http_status(:ok)
     expect(response.body).to include("Condividi diretta")
+    expect(response.body).to include("Copia live")
     expect(response.body).to include("Condividi link regia")
+    expect(response.body).to include("Copia regia")
+    expect(response.body).to include(">Diretta<")
+    expect(response.body).to include(">Regia<")
+    expect(response.body).to include("regia-tool-group")
+    expect(response.body).to include("Nascondi anteprima")
+    expect(response.body).to include('id="btn-pause"')
+    expect(response.body).to include('id="btn-stop"')
+    expect(response.body).to include("Qualità minima di trasmissione")
+    expect(response.body).to include('id="tel-bitrate"')
+    expect(response.body).to include('aria-controls="regia-quality"')
     expect(response.body).to include("/live/#{session.id}")
     expect(response.body).not_to include("Aruba")
   end
@@ -179,4 +190,39 @@ RSpec.describe "Public regia", type: :request do
     get public_regia_path(token)
     expect(response).to have_http_status(:ok)
   end
+
+  it "aggiorna la qualità minima di trasmissione" do
+    token = Sessions::RegiaAccess.new(session).issue_token!
+    patch public_regia_min_quality_path(token), params: { min_quality_preset: "720p_30_1.5mbps" }
+    expect(response).to have_http_status(:ok)
+    expect(session.reload.min_quality_preset).to eq("720p_30_1.5mbps")
+    json = JSON.parse(response.body)
+    expect(json["min_quality_preset"]).to eq("720p_30_1.5mbps")
+  end
+
+  it "espone la telemetria della camera nello status" do
+    session.device_states.create!(
+      device_role: "camera",
+      battery_level: 81,
+      network_type: "WiFi",
+      current_bitrate: 2_400_000,
+      target_bitrate: 4_500_000,
+      fps: 30,
+      thermal_state: "nominal",
+      last_seen_at: Time.current
+    )
+    token = Sessions::RegiaAccess.new(session).issue_token!
+    get public_regia_path(token)
+    expect(response.body).to include('id="regia-telemetry"')
+
+    get public_regia_status_path(token)
+    expect(response).to have_http_status(:ok)
+    tel = response.parsed_body["telemetry"]
+    expect(tel["battery"]).to eq(81)
+    expect(tel["network"]).to eq("WiFi")
+    expect(tel["fps"]).to eq(30)
+    expect(tel["bitrate"]).to eq(2_400_000)
+    expect(tel["thermal_state"]).to eq("nominal")
+    expect(tel).to have_key("publisher_online")
+  end
 end

backend/spec/services/sessions/select_quality_spec.rb

@@ -11,4 +11,11 @@ RSpec.describe Sessions::SelectQuality do
 
     expect(preset[:id]).to eq("1080p_30_4.5mbps")
   end
+
+  it "offre 1080p come qualità minima solo se la sessione è 1080p" do
+    expect(described_class.allowed_min_ids("720p_30_2.5mbps")).to eq(
+      %w[auto 720p_30_1.5mbps 720p_30_2.5mbps 720p_30_4mbps]
+    )
+    expect(described_class.allowed_min_ids("1080p_30_4.5mbps")).to include("1080p_30_4.5mbps")
+  end
 end

backend/spec/services/sessions/set_min_quality_spec.rb

@@ -0,0 +1,41 @@
+require "rails_helper"
+
+RSpec.describe Sessions::SetMinQuality do
+  let!(:user) { User.create!(email: "abr@test.it", name: "U", password: "Password123", role: "coach") }
+  let!(:club) { Club.create!(name: "C", sport: "volleyball", primary_color: "#e53935", secondary_color: "#ffffff") }
+  let!(:team) { club.teams.create!(name: "T", sport: "volleyball") }
+  let!(:match) { team.matches.create!(opponent_name: "Opp", sport: "volleyball") }
+  let!(:session) do
+    StreamSession.create!(
+      match: match,
+      user: user,
+      platform: "matchlivetv",
+      status: "live",
+      quality_preset: "720p_30_2.5mbps"
+    )
+  end
+
+  it "salva il pavimento e notifica i client" do
+    expect(SessionChannel).to receive(:broadcast_message).with(
+      session,
+      hash_including(action: "set_min_quality", min_quality_preset: "720p_30_1.5mbps")
+    )
+
+    described_class.new(session, preset: "720p_30_1.5mbps").call
+
+    expect(session.reload.min_quality_preset).to eq("720p_30_1.5mbps")
+    expect(session.stream_events.where(event_type: "quality_changed")).to exist
+  end
+
+  it "rifiuta 1080p se la sessione è 720p" do
+    expect {
+      described_class.new(session, preset: "1080p_30_4.5mbps").call
+    }.to raise_error(ArgumentError)
+  end
+
+  it "accetta auto come qualità minima" do
+    session.update!(min_quality_preset: "720p_30_1.5mbps")
+    described_class.new(session, preset: "auto").call
+    expect(session.reload.min_quality_preset).to eq("auto")
+  end
+end