Aggiunge bitrate adattivo con qualità minima da regia e telemetria del telefono.

L'encoder scende in congestione e risale piano; la regia imposta il pavimento, mostra lo stato del telefono e apre il selettore dal bitrate colorato.

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

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