Ajoute un avertissement sonore pour la phase cube

app.js

@@ -9,6 +9,7 @@ const DEFAULT_MOVE_LIMIT_MS = 20000;
 const TIME_MODE_INITIAL_CLOCK_MS = 600000;
 const CUBE_TIME_CAP_MS = 120000;
 const CUBE_START_HOLD_MS = 2000;
+const CUBE_PHASE_ALERT_NAVIGATION_DELAY_MS = 700;
 
 const PRESETS = {
   fast: {
@@ -56,6 +57,8 @@ window.requestAnimationFrame(() => {
 
 let match = readStoredMatch();
 let dirty = false;
+let audioContext = null;
+let cubePhaseAlertRetryCleanup = null;
 
 if (match) {
   if (normalizeRecoveredMatch(match)) {
@@ -67,6 +70,8 @@ if (match) {
 }
 
 window.addEventListener("beforeunload", flushState);
+document.addEventListener("pointerdown", tryUnlockAudioContext, { passive: true });
+document.addEventListener("keydown", tryUnlockAudioContext);
 document.addEventListener("visibilitychange", () => {
   if (document.hidden) {
     if (match) {
@@ -110,6 +115,120 @@ function syncViewportHeight() {
   document.documentElement.style.setProperty("--app-viewport-height", `${Math.round(viewportHeight)}px`);
 }
 
+function getAudioContext() {
+  const AudioContextClass = window.AudioContext || window.webkitAudioContext;
+  if (!AudioContextClass) {
+    return null;
+  }
+
+  if (!audioContext) {
+    try {
+      audioContext = new AudioContextClass();
+    } catch {
+      return null;
+    }
+  }
+
+  return audioContext;
+}
+
+function tryUnlockAudioContext() {
+  const context = getAudioContext();
+  if (!context || context.state === "running") {
+    return;
+  }
+
+  context.resume().catch(() => undefined);
+}
+
+function playCubePhaseAlert() {
+  const context = getAudioContext();
+  if (!context || context.state !== "running") {
+    return false;
+  }
+
+  const pattern = [
+    { frequency: 740, offset: 0, duration: 0.12, gain: 0.035 },
+    { frequency: 988, offset: 0.18, duration: 0.12, gain: 0.04 },
+    { frequency: 1318, offset: 0.36, duration: 0.2, gain: 0.05 },
+  ];
+  const startAt = context.currentTime + 0.02;
+
+  pattern.forEach(({ frequency, offset, duration, gain }) => {
+    const oscillator = context.createOscillator();
+    const envelope = context.createGain();
+    const toneStartAt = startAt + offset;
+
+    oscillator.type = "triangle";
+    oscillator.frequency.setValueAtTime(frequency, toneStartAt);
+    envelope.gain.setValueAtTime(0.0001, toneStartAt);
+    envelope.gain.exponentialRampToValueAtTime(gain, toneStartAt + 0.02);
+    envelope.gain.exponentialRampToValueAtTime(0.0001, toneStartAt + duration);
+
+    oscillator.connect(envelope);
+    envelope.connect(context.destination);
+    oscillator.start(toneStartAt);
+    oscillator.stop(toneStartAt + duration + 0.03);
+  });
+
+  return true;
+}
+
+function clearCubePhaseAlertRetry() {
+  if (typeof cubePhaseAlertRetryCleanup === "function") {
+    cubePhaseAlertRetryCleanup();
+    cubePhaseAlertRetryCleanup = null;
+  }
+}
+
+function scheduleCubePhaseAlertRetry(storedMatch) {
+  if (!storedMatch?.cube?.phaseAlertPending || cubePhaseAlertRetryCleanup) {
+    return;
+  }
+
+  const tryPlayOnGesture = () => {
+    tryUnlockAudioContext();
+    if (!playCubePhaseAlert()) {
+      return;
+    }
+
+    storedMatch.cube.phaseAlertPending = false;
+    dirty = true;
+    persistMatch();
+    clearCubePhaseAlertRetry();
+  };
+
+  const events = ["pointerdown", "keydown"];
+  cubePhaseAlertRetryCleanup = () => {
+    events.forEach((eventName) => {
+      document.removeEventListener(eventName, tryPlayOnGesture);
+    });
+  };
+
+  events.forEach((eventName) => {
+    document.addEventListener(eventName, tryPlayOnGesture, { passive: eventName === "pointerdown" });
+  });
+}
+
+function maybePlayPendingCubePhaseAlert(storedMatch) {
+  if (!storedMatch?.cube?.phaseAlertPending) {
+    clearCubePhaseAlertRetry();
+    return false;
+  }
+
+  tryUnlockAudioContext();
+  if (!playCubePhaseAlert()) {
+    scheduleCubePhaseAlertRetry(storedMatch);
+    return false;
+  }
+
+  storedMatch.cube.phaseAlertPending = false;
+  dirty = true;
+  persistMatch();
+  clearCubePhaseAlertRetry();
+  return true;
+}
+
 function initSetupPage() {
   const form = document.querySelector("#setupForm");
   const summary = document.querySelector("#setupSummary");
@@ -325,7 +444,25 @@ function initChronoPage() {
     return;
   }
 
+  let cubeNavigationTimeoutId = null;
   const goToCubePage = () => {
+    if (cubeNavigationTimeoutId !== null) {
+      return;
+    }
+
+    if (match?.cube?.phaseAlertPending) {
+      tryUnlockAudioContext();
+      if (playCubePhaseAlert()) {
+        match.cube.phaseAlertPending = false;
+        dirty = true;
+        persistMatch();
+        cubeNavigationTimeoutId = window.setTimeout(() => {
+          replaceTo("cube.html");
+        }, CUBE_PHASE_ALERT_NAVIGATION_DELAY_MS);
+        return;
+      }
+    }
+
     dirty = true;
     persistMatch();
     replaceTo("cube.html");
@@ -681,6 +818,8 @@ function initCubePage() {
     return;
   }
 
+  maybePlayPendingCubePhaseAlert(match);
+
   const refs = {
     title: document.querySelector("#cubeTitle"),
     subtitle: document.querySelector("#cubeSubtitle"),
@@ -790,6 +929,7 @@ function initCubePage() {
       resultModalKey = null;
       replayCubePhase(match);
       dirty = true;
+      maybePlayPendingCubePhaseAlert(match);
       render();
       return;
     }
@@ -806,6 +946,7 @@ function initCubePage() {
     resultModalKey = null;
     replayCubePhase(match);
     dirty = true;
+    maybePlayPendingCubePhaseAlert(match);
     render();
   });
 
@@ -1303,6 +1444,7 @@ function createMatch(config) {
       running: false,
       startedAt: null,
       elapsedMs: 0,
+      phaseAlertPending: false,
       times: {
         white: null,
         black: null,
@@ -1405,6 +1547,7 @@ function normalizeRecoveredMatch(storedMatch) {
       running: false,
       startedAt: null,
       elapsedMs: 0,
+      phaseAlertPending: false,
       times: { white: null, black: null },
       playerState: {
         white: createCubePlayerState(),
@@ -1424,6 +1567,11 @@ function normalizeRecoveredMatch(storedMatch) {
     changed = true;
   }
 
+  if (typeof storedMatch.cube.phaseAlertPending !== "boolean") {
+    storedMatch.cube.phaseAlertPending = false;
+    changed = true;
+  }
+
   storedMatch.cube.playerState.white = normalizeCubePlayerState(storedMatch.cube.playerState.white);
   storedMatch.cube.playerState.black = normalizeCubePlayerState(storedMatch.cube.playerState.black);
   storedMatch.cube.running = isAnyCubeTimerRunning(storedMatch);
@@ -1537,6 +1685,7 @@ function openCubePhase(storedMatch, reason = "") {
   storedMatch.cube.running = false;
   storedMatch.cube.startedAt = null;
   storedMatch.cube.elapsedMs = 0;
+  storedMatch.cube.phaseAlertPending = true;
   storedMatch.cube.times = { white: null, black: null };
   storedMatch.cube.playerState = {
     white: createCubePlayerState(),
@@ -1730,6 +1879,7 @@ function replayCubePhase(storedMatch) {
   storedMatch.cube.running = false;
   storedMatch.cube.startedAt = null;
   storedMatch.cube.elapsedMs = 0;
+  storedMatch.cube.phaseAlertPending = true;
   storedMatch.cube.times = { white: null, black: null };
   storedMatch.cube.playerState = {
     white: createCubePlayerState(),