feat(ui): add microphone mute control

s2s-client/index.html

@@ -256,7 +256,7 @@
              - Blue mic circular button (116 px, deep blue, white mic)
              - Two waveform banks left + right (audio-reactive CSS bars)
              - Listening status text
-             - Stop pill button below.
+             - Mute and stop controls below.
              Mirrors the screenshot center UI exactly. -->
         <div class="white-mic-stage" hidden data-theme-only="white" aria-label="Control de voz">
           <!-- Waveform left side: 7 bars mirror right side, heights driven by JS vars -->
@@ -302,16 +302,26 @@
           <p id="white-mic-caption" class="white-mic-caption" role="status">Toca para empezar</p>
           <p id="white-mic-subcaption" class="white-mic-subcaption" hidden></p>
 
-          <!-- Secondary stop pill below caption, with a dark stop-square icon. -->
+          <div id="white-session-controls" class="white-session-controls" role="group" aria-label="Controles de la conversación" hidden>
-          <button id="white-stop-btn"
+            <button id="white-mute-btn" class="white-mute-btn" type="button" hidden disabled aria-label="Silenciar micrófono" title="Silenciar micrófono">
-                  class="white-stop-btn"
+              <svg class="mic-on" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
-                  type="button"
+                <rect x="9" y="2" width="6" height="12" rx="3"/><path d="M5 10a7 7 0 0 0 14 0"/><line x1="12" y1="19" x2="12" y2="22"/>
-                  hidden
+              </svg>
-                  aria-label="Detener"
+              <svg class="mic-off" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
-                  title="Detener sesión de voz">
+                <line x1="2" y1="2" x2="22" y2="22"/><path d="M9 5a3 3 0 0 1 6 0v4"/><path d="M9 10v1a3 3 0 0 0 5.1 2.1"/><path d="M19 10a7 7 0 0 1-1.24 3.97"/><path d="M5 10a7 7 0 0 0 11 5.67"/><line x1="12" y1="19" x2="12" y2="22"/>
-            <svg viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><rect x="6" y="6" width="12" height="12" rx="2"/></svg>
+              </svg>
-            <span>Detener</span>
+              <span id="white-mute-label">Silenciar micrófono</span>
-          </button>
+            </button>
+            <button id="white-stop-btn"
+                    class="white-stop-btn"
+                    type="button"
+                    hidden
+                    aria-label="Detener"
+                    title="Detener sesión de voz">
+              <svg viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><rect x="6" y="6" width="12" height="12" rx="2"/></svg>
+              <span>Detener</span>
+            </button>
+          </div>
         </div>
 
         <p id="circle-caption" class="circle-caption" role="status">Toca para empezar</p>

s2s-client/main.js

@@ -670,6 +670,12 @@ const stopBtn = $("#stop-btn");
 const whiteMicBtn = $("#white-mic-circle");
 /** @type {HTMLButtonElement} */
 const whiteStopBtn = $("#white-stop-btn");
+/** @type {HTMLButtonElement} */
+const whiteMuteBtn = $("#white-mute-btn");
+/** @type {HTMLElement} */
+const whiteMuteLabel = $("#white-mute-label");
+/** @type {HTMLElement} */
+const whiteSessionControls = $("#white-session-controls");
 /** @type {HTMLParagraphElement} */
 const whiteMicCaption = $("#white-mic-caption");
 /** @type {HTMLParagraphElement} */
@@ -1917,12 +1923,28 @@ let micMuted = false;
 /** @type {Promise<void> | null} */
 let teardownPromise = null;
 
+function syncMicControls() {
+  const live = LIVE_STATES.has(currentState);
+  const canMute = live && !!micStream && !!client && !teardownPromise;
+  const label = micMuted ? "Activar micrófono" : "Silenciar micrófono";
+  for (const button of [micBtn, whiteMuteBtn]) {
+    button.disabled = !canMute;
+    button.classList.toggle("muted", micMuted);
+    button.setAttribute("aria-label", label);
+    button.title = label;
+  }
+  whiteMuteBtn.hidden = !live || s2sTheme !== "white";
+  whiteMuteLabel.textContent = label;
+}
+
 function syncVoiceControls() {
   const view = STATE_VIEWS[currentState];
   const live = LIVE_STATES.has(currentState);
   const disabled = view.disabled || !!teardownPromise;
+  const mutedWhileListening = micMuted && (currentState === "listening" || currentState === "user-speaking");
   const label = currentState === "error" ? "Reintentar conversación de voz"
-    : currentState === "idle" ? "Iniciar conversación de voz" : view.caption;
+    : currentState === "idle" ? "Iniciar conversación de voz"
+    : mutedWhileListening ? "Micrófono silenciado" : view.caption;
   circleBtn.disabled = disabled;
   circleBtn.setAttribute("aria-label", label);
   whiteMicBtn.disabled = disabled;
@@ -1930,6 +1952,8 @@ function syncVoiceControls() {
   whiteMicBtn.className = `white-mic-circle ${STATE_CLASS[currentState]}`;
   whiteStopBtn.hidden = !live || s2sTheme !== "white";
   whiteStopBtn.disabled = !live || !!teardownPromise;
+  whiteSessionControls.hidden = !live || s2sTheme !== "white";
+  syncMicControls();
 
   const waiting = currentState === "queued" || currentState === "your-turn";
   chatStatus.dataset.status = live ? "online" : currentState === "error" ? "error"
@@ -2017,7 +2041,8 @@ function updateRestartAvailability() {
  * @param {"" | "error" | "muted"} [kind]
  */
 function setCaption(text, kind = "") {
-  const trimmed = text.trim();
+  const mutedWhileListening = micMuted && (currentState === "listening" || currentState === "user-speaking") && kind !== "error";
+  const trimmed = mutedWhileListening ? "Micrófono silenciado" : text.trim();
   circleCaption.textContent = trimmed;
   // .idle-cta is the JS-based fallback (adds gradient CTA style) for browsers
   // that don't support :has(). The primary selector is .stage:has(.state-idle) .circle-caption.
@@ -2028,7 +2053,7 @@ function setCaption(text, kind = "") {
   if (addIdleCta) parts.push("idle-cta");
   circleCaption.className = parts.join(" ");
   whiteMicCaption.textContent = trimmed;
-  whiteMicCaption.classList.toggle("muted", kind === "muted");
+  whiteMicCaption.classList.toggle("muted", kind === "muted" || mutedWhileListening);
   whiteMicCaption.classList.toggle("error", kind === "error");
 }
 
@@ -3012,17 +3037,21 @@ async function handleStartError(err) {
   onFatalError(err);
 }
 
-micBtn.addEventListener("click", () => {
+function toggleMicMute() {
-  if (!micStream || !client) return;
+  if (!micStream || !client || !LIVE_STATES.has(currentState) || teardownPromise) return;
   micMuted = !micMuted;
   for (const track of micStream.getAudioTracks()) {
     track.enabled = !micMuted;
   }
   client.setMuted(micMuted);
-  micBtn.classList.toggle("muted", micMuted);
+  syncVoiceControls();
-  micBtn.setAttribute("aria-label", micMuted ? "Activar micrófono" : "Silenciar micrófono");
+  if ((currentState === "listening" || currentState === "user-speaking") && !whiteMicCaption.classList.contains("error")) {
-  micBtn.title = micMuted ? "Activar micrófono" : "Silenciar micrófono";
+    setCaption(STATE_VIEWS[currentState].caption);
-});
+  }
+}
+
+micBtn.addEventListener("click", toggleMicMute);
+whiteMuteBtn.addEventListener("click", toggleMicMute);
 
 stopBtn.addEventListener("click", async () => {
   await teardown();
@@ -3440,7 +3469,6 @@ async function finishTeardown(closingClient, finalState) {
     micStream = null;
   }
   micMuted = false;
-  micBtn.classList.remove("muted");
   setState(finalState);
   // Refresh the chip's remaining-today after the budget moved.
   if (limiterOn) void account.refresh();

s2s-client/style.css

@@ -542,6 +542,8 @@ a:hover {
     0 0 34px -6px color-mix(in srgb, var(--brand) 60%, transparent);
 }
 #ident-user-name[hidden],
+#white-session-controls[hidden],
+#white-mute-btn[hidden],
 #white-stop-btn[hidden],
 #white-mic-subcaption[hidden] {
   display: none !important;
@@ -4623,6 +4625,7 @@ html[data-theme="white"] .white-mic-circle:disabled {
   cursor: default;
 }
 html[data-theme="white"] .white-mic-circle:focus-visible,
+html[data-theme="white"] .white-mute-btn:focus-visible,
 html[data-theme="white"] .white-stop-btn:focus-visible {
   outline: 3px solid #1d4ed8;
   outline-offset: 4px;
@@ -4706,6 +4709,60 @@ html[data-theme="white"] .white-mic-subcaption {
   text-align: center;
 }
 
+/* ── Active conversation controls ──────────────────────────────────── */
+html[data-theme="white"] .white-session-controls {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  max-width: 100%;
+}
+html[data-theme="white"] .white-mute-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  min-height: 44px;
+  padding: 10px 16px;
+  border: 1px solid #cbd5e1;
+  border-radius: 999px;
+  background: #ffffff;
+  color: #1d4ed8;
+  font: inherit;
+  font-size: clamp(14px, 3.4vw, 16px);
+  font-weight: 600;
+  cursor: pointer;
+  transition: background 160ms ease, border-color 160ms ease;
+}
+html[data-theme="white"] .white-mute-btn:hover:not(:disabled) {
+  background: #eff6ff;
+  border-color: #93c5fd;
+}
+html[data-theme="white"] .white-mute-btn.muted {
+  background: #fffbeb;
+  border-color: #fcd34d;
+  color: #92400e;
+}
+html[data-theme="white"] .white-mute-btn.muted:hover:not(:disabled) {
+  background: #fef3c7;
+}
+html[data-theme="white"] .white-mute-btn:disabled {
+  cursor: default;
+}
+html[data-theme="white"] .white-mute-btn svg {
+  flex: none;
+  width: 18px;
+  height: 18px;
+}
+html[data-theme="white"] .white-mute-btn .mic-off,
+html[data-theme="white"] .white-mute-btn.muted .mic-on {
+  display: none;
+}
+html[data-theme="white"] .white-mute-btn.muted .mic-off {
+  display: block;
+}
+
 /* ── "Detener" pill ─────────────────────────────────────────────────── */
 html[data-theme="white"] .white-stop-btn {
   display: inline-flex;