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<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
    <title>Reachy Mini - Pollen Robotics</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link rel="preconnect" href="https://cdn.jsdelivr.net" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="style.css">
    <link rel="icon" href="https://raw.githubusercontent.com/pollen-robotics/reachy-mini-desktop-app/develop/src-tauri/icons/128x128.png" />

    <!-- Modern host-shell SDK entries. The standalone path loads
         `host/auto` (exports `mountHost`); the embed path loads
         `host/embed` (`connectToHost`). Same package, two entries,
         picked at runtime by the dispatcher at the bottom of <body>.
         Pinned to the exact tarball the three Pollen reference apps
         ship against — see APP_CREATION_GUIDE §10 (mixing SDK / host /
         daemon versions causes silent protocol drift). -->
    <link rel="modulepreload" href="https://cdn.jsdelivr.net/npm/@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c/host/dist/entry/auto.js" crossorigin>
    <link rel="modulepreload" href="https://cdn.jsdelivr.net/npm/@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c/host/dist/entry/embed.js" crossorigin>

    <!-- HF Spaces helper variables. In production (sdk: static +
         hf_oauth: true), HF substitutes these placeholders at file-
         serve time and the SDK reads them off `window.huggingface.variables`.
         Locally the placeholders stay raw (the leading `__` gives them
         away) — we drop the global so `mountHost()` falls back to a
         devToken or a manually-passed clientId. -->
    <script>
        (function () {
            var clientId = "__OAUTH_CLIENT_ID__";
            var scopes = "__OAUTH_SCOPES__";
            var spaceHost = "__SPACE_HOST__";
            var spaceId = "__SPACE_ID__";
            var looksSubstituted = clientId && clientId.indexOf("__") !== 0;
            if (looksSubstituted) {
                window.huggingface = window.huggingface || {};
                window.huggingface.variables = {
                    OAUTH_CLIENT_ID: clientId,
                    OAUTH_SCOPES: scopes && scopes.indexOf("__") !== 0 ? scopes : "openid profile",
                    SPACE_HOST: spaceHost && spaceHost.indexOf("__") !== 0 ? spaceHost : "",
                    SPACE_ID: spaceId && spaceId.indexOf("__") !== 0 ? spaceId : "",
                };
            }
        })();
    </script>

    <!-- `process` shim for CDN-loaded ESM.
         The host bundle (`host/dist/entry/auto.js`) was built expecting
         a downstream bundler (Vite/Rollup) to substitute `process.env.NODE_ENV`
         at build time. Loaded raw from jsdelivr that substitution never
         happens, and the chunk crashes on first reference with
         `ReferenceError: process is not defined`. A tiny shim assigned
         BEFORE the module imports run resolves it. The double-`??=` keeps
         us a polite citizen in case any later loader brings a real `process`.
         (We DON'T need this when using a bundler — see the `dashboard/`
         sibling app, where Vite handles the substitution.) -->
    <script>
        globalThis.process ??= { env: {} };
        globalThis.process.env ??= {};
        globalThis.process.env.NODE_ENV ??= 'production';
    </script>

    <!-- Pre-paint visibility gate. Both paths start with #mainApp hidden:
           - Standalone: mountHost() owns the page; #mainApp stays hidden.
           - Embed: #mainApp is revealed by the embed handler once
             connectToHost() resolves. While the handshake is in flight
             we seed a "Connecting…" status pill so the eventual paint
             reads as "almost there" rather than "broken". -->
    <script>
        (function () {
            try {
                document.addEventListener('DOMContentLoaded', function () {
                    var main = document.getElementById('mainApp');
                    if (main) main.classList.add('hidden');
                    var params = new URLSearchParams(window.location.search);
                    if (params.get('embedded') === '1' || params.get('embed') === '1') {
                        var statusText = document.getElementById('statusText');
                        var statusIndicator = document.getElementById('statusIndicator');
                        if (statusIndicator) statusIndicator.className = 'status-indicator connecting';
                        if (statusText) statusText.textContent = 'Connecting…';
                    }
                });
            } catch (e) { /* best-effort polish */ }
        })();
    </script>
</head>
<body>
    <!--
      Host shell mount point. On a standalone visit, `mountHost()` from
      the SDK's `host/auto` entry renders the full host UI (sign-in,
      robot picker, top bar, leave button) into this div, owns OAuth
      + connection lifecycle, and iframes back into THIS page with
      `?embedded=1` once a robot is awake. We no longer hand-roll the
      sign-in screen, picker, or Stop button — the host owns them.
    -->
    <div id="root"></div>

    <!-- Main App — the post-connect surface. Hidden until either the
         host shell shows us (standalone path, in-iframe) or the embed
         dispatcher resolves connectToHost() (embed path). Everything
         below this point is unchanged feature-wise vs the original
         single-file demo. -->
    <div id="mainApp" class="hidden">
        <header class="header">
            <div class="logo">
                <img src="https://raw.githubusercontent.com/pollen-robotics/reachy-mini-desktop-app/develop/src-tauri/icons/128x128.png" alt="Reachy Mini">
                <div class="logo-text">Reachy Mini <span>by Pollen Robotics</span></div>
            </div>
            <div class="user-section">
                <!-- Daemon version is filled in once the WebRTC data channel
                     is open (via reachy.getVersion()). Hidden until then so
                     we don't show a stale/empty badge during connect. The
                     host shell's top bar shows the signed-in user + sign-out
                     menu, so we no longer duplicate them here. -->
                <div id="daemonVersion" class="user-badge hidden" title="Daemon version"></div>
            </div>
        </header>

        <div class="app-container">
            <!-- Video -->
            <div class="video-container">
                <video id="remoteVideo" autoplay playsinline muted></video>

                <div class="video-overlay-top">
                    <div class="connection-badge">
                        <div class="status-indicator" id="statusIndicator"></div>
                        <span id="statusText">Disconnected</span>
                    </div>
                    <div class="robot-name" id="robotName"></div>
                    <div class="latency-badge hidden" id="latencyBadge">
                        <span id="latencyValue">--</span>
                    </div>
                </div>

                <div class="video-overlay-bottom">
                    <div class="video-controls">
                        <!--
                          Connect / Stop are gone — the host shell's top
                          bar owns "leave session", and the iframe boots
                          already-connected via connectToHost(). Only the
                          per-direction audio toggles remain on the video,
                          since they're local-mute settings, not session
                          lifecycle.
                        -->
                        <button class="btn btn-mute muted" id="muteBtn" onclick="toggleMute()" disabled>
                            <svg id="speakerOffIcon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                                <polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5"></polygon>
                                <line x1="23" y1="9" x2="17" y2="15"></line>
                                <line x1="17" y1="9" x2="23" y2="15"></line>
                            </svg>
                            <svg id="speakerOnIcon" class="hidden" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                                <polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5"></polygon>
                                <path d="M19.07 4.93a10 10 0 0 1 0 14.14M15.54 8.46a5 5 0 0 1 0 7.07"></path>
                            </svg>
                            <span id="muteText">Unmute</span>
                        </button>
                        <button class="btn btn-mute muted" id="micBtn" onclick="toggleMic()" disabled>
                            <svg id="micOffIcon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                                <line x1="1" y1="1" x2="23" y2="23"></line>
                                <path d="M9 9v3a3 3 0 0 0 5.12 2.12M15 9.34V4a3 3 0 0 0-5.94-.6"></path>
                                <path d="M17 16.95A7 7 0 0 1 5 12v-2m14 0v2c0 .76-.13 1.49-.35 2.17"></path>
                                <line x1="12" y1="19" x2="12" y2="23"></line>
                                <line x1="8" y1="23" x2="16" y2="23"></line>
                            </svg>
                            <svg id="micOnIcon" class="hidden" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                                <path d="M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z"></path>
                                <path d="M19 10v2a7 7 0 0 1-14 0v-2"></path>
                                <line x1="12" y1="19" x2="12" y2="23"></line>
                                <line x1="8" y1="23" x2="16" y2="23"></line>
                            </svg>
                            <span id="micText">Mic Off</span>
                        </button>
                    </div>
                </div>
            </div>


            <!-- Robot Selector removed — the host shell owns robot
                 picking. By the time the embed handler runs, the
                 session is already up against the chosen robot. -->

            <!-- Head Control - RPY Sliders -->
            <div class="panel">
                <div class="panel-header">Head Orientation</div>
                <div class="panel-content">
                    <div class="slider-row">
                        <span class="slider-label">Roll</span>
                        <input type="range" class="slider" id="rollSlider" min="-20" max="20" value="0" step="0.5">
                        <span class="slider-value" id="rollValue">0.0°</span>
                    </div>
                    <div class="slider-row">
                        <span class="slider-label">Pitch</span>
                        <input type="range" class="slider" id="pitchSlider" min="-30" max="30" value="0" step="0.5">
                        <span class="slider-value" id="pitchValue">0.0°</span>
                    </div>
                    <div class="slider-row">
                        <span class="slider-label">Yaw</span>
                        <input type="range" class="slider" id="yawSlider" min="-160" max="160" value="0" step="0.5">
                        <span class="slider-value" id="yawValue">0.0°</span>
                    </div>
                </div>
            </div>

            <!-- Body / Base Yaw -->
            <div class="panel">
                <div class="panel-header">Body</div>
                <div class="panel-content">
                    <div class="slider-row">
                        <span class="slider-label">Yaw</span>
                        <input type="range" class="slider" id="bodyYawSlider" min="-160" max="160" value="0" step="1">
                        <span class="slider-value" id="bodyYawValue"></span>
                    </div>
                </div>
            </div>

            <!-- Antennas -->
            <div class="panel">
                <div class="panel-header">Antennas</div>
                <div class="panel-content">
                    <div class="slider-row">
                        <span class="slider-label">Right</span>
                        <input type="range" class="slider" id="rightAntSlider" min="-175" max="175" value="0">
                        <span class="slider-value" id="rightAntValue"></span>
                    </div>
                    <div class="slider-row">
                        <span class="slider-label">Left</span>
                        <input type="range" class="slider" id="leftAntSlider" min="-175" max="175" value="0">
                        <span class="slider-value" id="leftAntValue"></span>
                    </div>
                </div>
            </div>

            <!-- Animations -->
            <div class="panel">
                <div class="panel-header">Animations</div>
                <div class="panel-content">
                    <div class="sound-row">
                        <button class="btn btn-primary" id="btnWakeUp" onclick="playWakeUp()" disabled>Wake up</button>
                        <button class="btn btn-secondary" id="btnGotoSleep" onclick="playGotoSleep()" disabled>Go to sleep</button>
                    </div>
                </div>
            </div>

            <!-- Torque -->
            <div class="panel">
                <div class="panel-header">Torque</div>
                <div class="panel-content">
                    <div class="sound-row">
                        <!-- Label and action flip based on the current motor
                             mode, which is surfaced via the 'state' event. -->
                        <button class="btn btn-primary" id="btnTorqueToggle" onclick="toggleTorque()" disabled>Torque …</button>
                    </div>
                </div>
            </div>

            <!-- Sound -->
            <div class="panel">
                <div class="panel-header">Sound</div>
                <div class="panel-content">
                    <div class="sound-row">
                        <input type="text" class="sound-input" id="soundInput" placeholder="Sound file...">
                        <button class="btn btn-primary" id="btnPlaySound" onclick="playSound()" disabled>Play</button>
                    </div>
                    <div class="sound-presets">
                        <span class="preset-chip" onclick="playSoundPreset('wake_up.wav')">wake_up</span>
                        <span class="preset-chip" onclick="playSoundPreset('go_sleep.wav')">go_sleep</span>
                        <span class="preset-chip" onclick="playSoundPreset('yes.wav')">yes</span>
                        <span class="preset-chip" onclick="playSoundPreset('no.wav')">no</span>
                    </div>
                </div>
            </div>

            <!-- Volume -->
            <div class="panel">
                <div class="panel-header">Volume</div>
                <div class="panel-content">
                    <div class="slider-row">
                        <span class="slider-label">Speaker</span>
                        <input type="range" class="slider" id="volumeSlider" min="0" max="100" value="50" disabled>
                        <span class="slider-value" id="volumeValue">--</span>
                    </div>
                </div>
            </div>

            <!-- Daemon logs -->
            <div class="panel">
                <div class="panel-header">
                    Daemon logs
                    <button class="btn btn-secondary" id="btnClearLogs" onclick="clearLogs()" style="margin-left:auto;font-size:0.8em;padding:4px 8px;">Clear</button>
                </div>
                <div class="panel-content">
                    <pre id="logsView" style="max-height:240px;overflow:auto;background:#0b0b0b;color:#c8c8c8;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;padding:8px;margin:0;white-space:pre-wrap;word-break:break-word;border-radius:6px;">Waiting for stream...</pre>
                </div>
            </div>

        </div>
    </div>

    <script type="module">
        // ===== SDK imports (modern host-shell pattern) =====
        //
        // Three entry points from the same npm pin
        // (@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c — the
        // exact tarball the three Pollen reference apps ship against;
        // see APP_CREATION_GUIDE §10 on version drift):
        //
        //   - host/dist/entry/auto.js    → `mountHost`     (standalone path)
        //   - host/dist/entry/embed.js   → `connectToHost` (embed path)
        //   - root (/+esm bundled by jsdelivr)             math helpers
        //
        // jsdelivr's `/+esm` endpoint inlines the SDK's bare npm deps
        // (notably `@huggingface/hub`) into a single self-contained
        // ESM bundle so the browser doesn't choke on the bare specifier.
        // The host bundles are already Vite-built and self-contained, so
        // they load straight from `host/dist/entry/*.js`.
        import { mountHost } from "https://cdn.jsdelivr.net/npm/@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c/host/dist/entry/auto.js";
        import { connectToHost } from "https://cdn.jsdelivr.net/npm/@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c/host/dist/entry/embed.js";
        import { matrixToRpy, radToDeg, rpyToMatrix, degToRad } from "https://cdn.jsdelivr.net/npm/@pollen-robotics/reachy-mini-sdk@1.8.0-rc1-main.fd4354c/+esm";

        // Live SDK instance for the running session. Set on the embed
        // path by `connectToHost().reachy`. All callbacks below read
        // `robot` at call time, so the late assignment is invisible to
        // them.
        let robot = null;

        // ===== Module-scope state (unchanged from the legacy demo) =====
        let headSlidersActive = false;
        let bodyYawSliderActive = false;
        // Last body yaw the user *committed* via the slider, in degrees.
        // The baseline for the tank-coupled head counter-rotation must
        // be the last COMMANDED value (this variable), never telemetry —
        // telemetry lags one WebRTC RTT, so cumulative deltas computed
        // against it stall under rapid drags.
        let lastBodyYawDeg = 0;
        let detachVideo = null;
        let latencyIntervalId = null;
        // Returned by reachy.subscribeLogs(); call to stop the daemon-side
        // journalctl stream. Reset on every leave.
        let logsUnsub = null;
        // Cap the logs panel so a long session doesn't grow without bound.
        const LOGS_MAX_LINES = 500;

        // Inline-onclick handlers. Sign-in / sign-out / connect / stop
        // are gone — the host shell owns them now.
        window.playSound = playSound;
        window.playSoundPreset = playSoundPreset;
        window.playWakeUp = playWakeUp;
        window.playGotoSleep = playGotoSleep;
        window.toggleTorque = toggleTorque;
        window.toggleMute = toggleMute;
        window.toggleMic = toggleMic;
        window.clearLogs = clearLogs;

        // ===== Dispatcher =====
        //
        // Standalone visit (no `?embedded=1`): mountHost() renders the
        // full host shell into #root. The shell handles HF OAuth + robot
        // picker + the leave button, and once a robot is awake it iframes
        // THIS page at `?embedded=1`. No further JS in this module runs
        // in the outer document.
        //
        // Embed visit: connectToHost() decodes the hash creds, brings
        // the WebRTC session up, wakes the robot, and resolves with a
        // typed handle. We replay its video+audio into our <video>, then
        // wire the legacy slider / sound / log / latency UI exactly as
        // before.
        document.addEventListener('DOMContentLoaded', async () => {
            const params = new URLSearchParams(window.location.search);
            const isEmbed = params.get('embedded') === '1' || params.get('embed') === '1';

            if (!isEmbed) {
                mountHost({
                    appName: 'Reachy Mini WebRTC Demo',
                    appIconUrl: 'https://raw.githubusercontent.com/pollen-robotics/reachy-mini-desktop-app/develop/src-tauri/icons/128x128.png',
                    appEmoji: '🤖',
                    // We use the robot's mic in the audio toggles; the host
                    // needs to know so it negotiates an inbound audio track.
                    enableMicrophone: true,
                });
                return;
            }

            try {
                const handle = await connectToHost();
                robot = handle.reachy;
                // The host bridge captured the inbound video+audio tracks
                // during boot; replay them into our <video>. attachVideo
                // returns a cleanup we hold for the onLeave teardown.
                detachVideo = handle.media.attachVideo(document.getElementById('remoteVideo'));

                // Wire all the post-connect UI. Order matters: bind the
                // event listeners FIRST so we don't miss the `state` /
                // `micSupported` ticks that fire right after the session
                // is already up.
                initRobotEvents();
                initSliders();
                showMainApp();
                updateStatus('connected', 'Connected');
                enableControls(true);
                startLatencyDisplay();
                fetchDaemonVersionOnce();
                syncVolumeSlider();
                startLogsStream();

                // Host-requested leave (user clicks the top-bar leave
                // button, or page lifecycle tears down). Best-effort
                // cleanup — the iframe is about to be unmounted anyway.
                handle.onLeave(() => {
                    try { if (detachVideo) detachVideo(); } catch (_) {}
                    detachVideo = null;
                    stopLatencyDisplay();
                    stopLogsStream();
                });
            } catch (err) {
                console.error('[embed] connectToHost failed:', err);
                updateStatus('', 'Embed connect failed: ' + (err?.message || err));
            }
        });

        function showMainApp() {
            document.getElementById('mainApp').classList.remove('hidden');
        }

        // ===================== Robot Events =====================
        //
        // We only bind the events that drive *in-iframe* UI (state echo,
        // mic-support gate, telemetry-driven slider sync, server-initiated
        // session-stop messages). Sign-in / picker / connect-button state
        // events are gone — the host shell handles them outside the iframe.
        function initRobotEvents() {
            robot.addEventListener('sessionStopped', (e) => {
                enableControls(false);
                // e.detail.message is set when the stop was server-initiated
                // (e.g. a local Python app took over the robot). Surfaced in
                // the in-iframe status pill so the user has a reason for the
                // sudden silence.
                updateStatus('connected', e.detail?.message || 'Session ended');
                updateMicButton();
                stopLatencyDisplay();
                // Disable the volume slider and clear the version pill —
                // they only make sense while the data channel is open.
                document.getElementById('volumeSlider').disabled = true;
                document.getElementById('volumeValue').textContent = '--';
                document.getElementById('daemonVersion').classList.add('hidden');
                // Reset the torque button label so it doesn't claim a stale
                // state between sessions.
                const tb = document.getElementById('btnTorqueToggle');
                tb.textContent = 'Torque …';
                delete tb.dataset.currentMode;
                stopLogsStream();
            });

            robot.addEventListener('state', (e) => updateStateDisplay(e.detail));

            robot.addEventListener('micSupported', () => {
                enableControls(robot.state === 'streaming');
            });

            robot.addEventListener('error', (e) => {
                console.error(`[${e.detail.source}]`, e.detail.error);
                if (e.detail.source === 'webrtc') {
                    updateStatus('', 'Connection lost');
                }
            });
        }

        // ===================== Connection =====================
        function updateStatus(status, text) {
            document.getElementById('statusIndicator').className = 'status-indicator ' + status;
            document.getElementById('statusText').textContent = text;
        }

        // Wake-on-stream is handled inside autoConnect() now (it calls
        // robot.ensureAwake() after startSession resolves), so no
        // ensureAwakeOnce() wrapper lives here any more.

        // ---- Daemon version (fetched once per session over WebRTC) ----
        async function fetchDaemonVersionOnce() {
            try {
                const v = await robot.getVersion();
                if (!v) return;
                const el = document.getElementById('daemonVersion');
                el.textContent = `Daemon v${v}`;
                el.classList.remove('hidden');
            } catch (e) {
                // Data channel closed mid-request, or lib version too old
                // to support get_version. Non-fatal — but log at WARN so
                // a stale CDN-cached lib (missing the method) is visible
                // in the browser console without "Verbose" level turned on.
                console.warn('getVersion failed:', e);
            }
        }

        // ---- Volume slider wiring ----
        //
        // Two events matter:
        //   - 'input'   fires continuously while dragging — used for the
        //               live "75%" label so the UI feels responsive.
        //   - 'change'  fires on release — the only moment we actually
        //               call setVolume over WebRTC. Avoids spamming the
        //               robot with one command per pixel of drag.
        //
        // syncVolumeSlider() runs on streaming-start to pull the robot's
        // real current volume so the slider reflects reality rather than
        // the default "50" in the markup.
        async function syncVolumeSlider() {
            const slider = document.getElementById('volumeSlider');
            const label = document.getElementById('volumeValue');
            // Early detection: if the loaded JS lib predates the volume
            // commands (stale jsdelivr cache, old branch), fail loudly
            // rather than silently rendering "n/a".
            if (typeof robot.getVolume !== 'function') {
                console.warn(
                    'robot.getVolume is not a function — the reachy-mini.js ' +
                    'lib loaded from CDN is older than the webrtc_example UI. ' +
                    'Purge jsdelivr and hard-refresh the page.'
                );
                label.textContent = 'lib';
                return;
            }
            try {
                const v = await robot.getVolume();
                if (v == null) {
                    // Volume control unavailable (unsupported platform or
                    // audio stack down) — keep the slider disabled.
                    label.textContent = 'n/a';
                    return;
                }
                slider.value = v;
                label.textContent = `${v}%`;
                slider.disabled = false;
            } catch (e) {
                // Log at WARN so it's visible without "Verbose" level.
                console.warn('getVolume failed:', e);
                label.textContent = 'n/a';
            }
        }

        // ===================== Daemon log stream =====================
        //
        // The daemon exposes its `journalctl -u reachy-mini-daemon` lines as
        // typed `log_line` messages on the WebRTC data channel. We open the
        // subscription on streaming-start and tear it down on stop so the
        // daemon-side subprocess only runs while a peer is actively viewing.
        // The same SDK call works for the LAN-direct GStreamer signaling
        // path and the Central + WebRTC remote path — both share the typed
        // command surface.
        function appendLogLine({ timestamp, line }) {
            const view = document.getElementById('logsView');
            if (!view) return;
            const wasInitial = view.firstChild && view.firstChild.nodeType === Node.TEXT_NODE
                && view.textContent === 'Waiting for stream...';
            if (wasInitial) view.textContent = '';
            // Auto-scroll only if the user is already pinned to the bottom;
            // otherwise let them browse history without snapping back.
            const stick = view.scrollTop + view.clientHeight >= view.scrollHeight - 4;
            const div = document.createElement('div');
            div.textContent = timestamp ? `${timestamp}  ${line}` : line;
            view.appendChild(div);
            // Trim oldest lines past the cap so the DOM doesn't grow forever.
            while (view.childElementCount > LOGS_MAX_LINES) {
                view.removeChild(view.firstChild);
            }
            if (stick) view.scrollTop = view.scrollHeight;
        }

        function startLogsStream() {
            if (typeof robot.subscribeLogs !== 'function') {
                console.warn(
                    'robot.subscribeLogs is not a function — the reachy-mini.js ' +
                    'lib loaded from CDN predates the daemon log feature. ' +
                    'Purge jsdelivr and hard-refresh the page.'
                );
                document.getElementById('logsView').textContent = 'subscribeLogs not in SDK';
                return;
            }
            stopLogsStream();
            document.getElementById('logsView').textContent = 'Subscribing...';
            try {
                logsUnsub = robot.subscribeLogs({
                    onLine: appendLogLine,
                    onError: (err) => {
                        appendLogLine({ timestamp: '', line: `[log_stream_error] ${err}` });
                    },
                });
            } catch (e) {
                console.warn('subscribeLogs failed:', e);
                document.getElementById('logsView').textContent = `Failed: ${e.message || e}`;
            }
        }

        function stopLogsStream() {
            if (logsUnsub) {
                try { logsUnsub(); } catch (e) { console.warn('logsUnsub threw:', e); }
                logsUnsub = null;
            }
        }

        function clearLogs() {
            const view = document.getElementById('logsView');
            if (view) view.textContent = '';
        }

        (function initVolumeSlider() {
            const slider = document.getElementById('volumeSlider');
            const label = document.getElementById('volumeValue');
            slider.addEventListener('input', () => {
                label.textContent = `${slider.value}%`;
            });
            slider.addEventListener('change', async () => {
                const requested = parseInt(slider.value, 10);
                if (typeof robot.setVolume !== 'function') {
                    console.warn(
                        'robot.setVolume is not a function — old JS lib on CDN; ' +
                        'purge jsdelivr and hard-refresh.'
                    );
                    return;
                }
                try {
                    const applied = await robot.setVolume(requested);
                    if (applied != null) {
                        // Server may clamp/round — reflect the truth back
                        // into the UI so the slider isn't a lie.
                        slider.value = applied;
                        label.textContent = `${applied}%`;
                    }
                } catch (e) {
                    console.warn('setVolume failed:', e);
                }
            });
        })();

        // Connection bring-up (auth, picker, session start, wake) is
        // owned by the host shell now — see `mountHost()` in the
        // dispatcher above. The legacy `connectAndStream` /
        // `presentRobotPicker` / `refreshPickerOnList` helpers are gone.

        // ===================== Latency =====================
        function startLatencyDisplay() {
            const badge = document.getElementById('latencyBadge');
            const label = document.getElementById('latencyValue');
            badge.classList.remove('hidden');

            latencyIntervalId = setInterval(async () => {
                const video = document.getElementById('remoteVideo');
                let bufLagMs = null;
                let rttMs = null;
                let vidJitterMs = null;
                let audJitterMs = null;

                // Buffer lag (how far behind live edge)
                if (video && video.buffered && video.buffered.length > 0) {
                    const end = video.buffered.end(video.buffered.length - 1);
                    bufLagMs = Math.round((end - video.currentTime) * 1000);
                }

                // WebRTC stats: RTT + jitter buffer delay (video & audio)
                if (robot._pc) {
                    try {
                        const stats = await robot._pc.getStats();
                        stats.forEach(report => {
                            if (report.type === 'candidate-pair' && report.currentRoundTripTime != null) {
                                rttMs = Math.round(report.currentRoundTripTime * 1000);
                            }
                            if (report.type === 'inbound-rtp' && report.jitterBufferDelay != null && report.jitterBufferEmittedCount > 0) {
                                const jMs = Math.round((report.jitterBufferDelay / report.jitterBufferEmittedCount) * 1000);
                                if (report.kind === 'video') vidJitterMs = jMs;
                                if (report.kind === 'audio') audJitterMs = jMs;
                            }
                        });
                    } catch (_) { /* no stats yet */ }
                }

                // Display
                const parts = [];
                if (bufLagMs != null) parts.push(`buf ${bufLagMs}ms`);
                if (rttMs != null) parts.push(`rtt ${rttMs}ms`);
                if (vidJitterMs != null) parts.push(`v-jit ${vidJitterMs}ms`);
                if (audJitterMs != null) parts.push(`a-jit ${audJitterMs}ms`);
                label.textContent = parts.length ? parts.join(' · ') : '--';

                // Color based on buffer lag
                badge.classList.remove('good', 'ok', 'bad');
                if (bufLagMs != null) {
                    if (bufLagMs < 200) badge.classList.add('good');
                    else if (bufLagMs < 500) badge.classList.add('ok');
                    else badge.classList.add('bad');
                }
            }, 1000);
        }

        function stopLatencyDisplay() {
            if (latencyIntervalId) { clearInterval(latencyIntervalId); latencyIntervalId = null; }
            const badge = document.getElementById('latencyBadge');
            badge.classList.add('hidden');
            badge.classList.remove('good', 'ok', 'bad');
        }

        // ===================== Session =====================
        // Session lifecycle (start / stop / wake / sleep on leave) lives
        // in the host shell. The iframe receives an already-connected,
        // already-awake handle via connectToHost(). The `handle.onLeave()`
        // wired in the dispatcher above is our only teardown hook.

        // ===================== Audio =====================
        function toggleMute() {
            robot.setAudioMuted(!robot.audioMuted);
            updateMuteButton();
        }

        function toggleMic() {
            robot.setMicMuted(!robot.micMuted);
            updateMicButton();
        }

        function updateMuteButton() {
            const muted = robot.audioMuted;
            const btn = document.getElementById('muteBtn');
            btn.classList.toggle('muted', muted);
            document.getElementById('speakerOffIcon').classList.toggle('hidden', !muted);
            document.getElementById('speakerOnIcon').classList.toggle('hidden', muted);
            document.getElementById('muteText').textContent = muted ? 'Unmute' : 'Mute';
        }

        function updateMicButton() {
            const muted = robot.micMuted;
            const btn = document.getElementById('micBtn');
            btn.classList.toggle('muted', muted);
            document.getElementById('micOffIcon').classList.toggle('hidden', !muted);
            document.getElementById('micOnIcon').classList.toggle('hidden', muted);
            document.getElementById('micText').textContent = muted ? 'Mic Off' : 'Mic On';
        }

        function enableControls(enabled) {
            document.getElementById('btnPlaySound').disabled = !enabled;
            document.getElementById('btnWakeUp').disabled = !enabled;
            document.getElementById('btnGotoSleep').disabled = !enabled;
            document.getElementById('btnTorqueToggle').disabled = !enabled;
            document.getElementById('muteBtn').disabled = !enabled;
            document.getElementById('micBtn').disabled = !enabled || !robot.micSupported;
        }

        // ===================== State Display =====================
        // The "state" event ships raw wire units (flat 4×4 matrix, radians);
        // the UI works in degrees, so we convert at the boundary.
        function updateStateDisplay(state) {
            // Also gate on bodyYawSliderActive: dragging the body slider
            // mutates yawSlider.value (head/body rotate together), and the
            // daemon's mid-IK present_head_pose lags the target. Without
            // this gate, matrixToRpy of the in-flight pose pumps drifted
            // roll/pitch/yaw back into the head sliders, which the next
            // body-input event reads and re-sends — visible as pitch/roll
            // jitter while the body slider is being dragged.
            if (state.head && !headSlidersActive && !bodyYawSliderActive) {
                // state.head is number[16] (flat row-major 4×4); matrixToRpy
                // wants nested 4×4, so unflatten.
                const m = [
                    state.head.slice(0, 4),
                    state.head.slice(4, 8),
                    state.head.slice(8, 12),
                    state.head.slice(12, 16),
                ];
                const rpy = matrixToRpy(m);
                document.getElementById('rollSlider').value = rpy.roll;
                document.getElementById('rollValue').textContent = rpy.roll.toFixed(1) + '°';
                document.getElementById('pitchSlider').value = rpy.pitch;
                document.getElementById('pitchValue').textContent = rpy.pitch.toFixed(1) + '°';
                document.getElementById('yawSlider').value = rpy.yaw;
                document.getElementById('yawValue').textContent = rpy.yaw.toFixed(1) + '°';
            }
            if (state.antennas) {
                const r = radToDeg(state.antennas[0]).toFixed(0);
                const l = radToDeg(state.antennas[1]).toFixed(0);
                document.getElementById('rightAntSlider').value = r;
                document.getElementById('rightAntValue').textContent = r + '°';
                document.getElementById('leftAntSlider').value = l;
                document.getElementById('leftAntValue').textContent = l + '°';
            }
            if (typeof state.body_yaw === 'number' && !bodyYawSliderActive) {
                const y = radToDeg(state.body_yaw).toFixed(0);
                document.getElementById('bodyYawSlider').value = y;
                document.getElementById('bodyYawValue').textContent = y + '°';
                // Sync the delta baseline so the next drag computes from
                // the robot's actual current yaw, not whatever the slider
                // happened to be at on page load.
                lastBodyYawDeg = parseFloat(y);
            }
            if (state.motor_mode) updateTorqueButton(state.motor_mode);
        }

        function updateTorqueButton(mode) {
            const btn = document.getElementById('btnTorqueToggle');
            if (!btn) return;
            // Normalise: anything other than "disabled" is considered "on"
            // for toggle purposes. gravity_compensation is torque-on too.
            const isOn = mode && mode !== 'disabled';
            btn.textContent = isOn ? 'Torque: On (click to disable)' : 'Torque: Off (click to enable)';
            // Stash the current intent so the click handler knows which
            // direction to flip without rereading _robotState.
            btn.dataset.currentMode = mode;
        }

        // ===================== Sliders =====================
        function initSliders() {
            // Head
            const rollSlider = document.getElementById('rollSlider');
            const pitchSlider = document.getElementById('pitchSlider');
            const yawSlider = document.getElementById('yawSlider');
            const rollValue = document.getElementById('rollValue');
            const pitchValue = document.getElementById('pitchValue');
            const yawValue = document.getElementById('yawValue');

            // Body yaw
            const bodyYawSlider = document.getElementById('bodyYawSlider');
            const bodyYawValue = document.getElementById('bodyYawValue');

            // Antennas
            const rightSlider = document.getElementById('rightAntSlider');
            const leftSlider = document.getElementById('leftAntSlider');
            const rightAntValue = document.getElementById('rightAntValue');
            const leftAntValue = document.getElementById('leftAntValue');

            // Single source of truth: read every slider's DOM state and
            // ship it in one atomic setTarget command. Per-slider input
            // handlers update their label, optionally run cross-slider
            // compensation (body-yaw drag → head-yaw counter-rotation),
            // then call this. One round-trip per gesture, no chance for
            // the daemon to see a half-applied target between components.
            function sendCurrentTarget() {
                robot.setTarget({
                    head: rpyToMatrix(
                        parseFloat(rollSlider.value),
                        parseFloat(pitchSlider.value),
                        parseFloat(yawSlider.value),
                    ).flat(),
                    antennas: [
                        degToRad(parseFloat(rightSlider.value)),
                        degToRad(parseFloat(leftSlider.value)),
                    ],
                    body_yaw: degToRad(parseFloat(bodyYawSlider.value)),
                });
            }

            const onStart = () => { headSlidersActive = true; };
            const onEnd = () => { headSlidersActive = false; };

            for (const s of [rollSlider, pitchSlider, yawSlider]) {
                s.addEventListener('mousedown', onStart);
                s.addEventListener('touchstart', onStart);
                s.addEventListener('mouseup', onEnd);
                s.addEventListener('touchend', onEnd);
            }

            rollSlider.addEventListener('input', () => { rollValue.textContent = parseFloat(rollSlider.value).toFixed(1) + '°'; sendCurrentTarget(); });
            pitchSlider.addEventListener('input', () => { pitchValue.textContent = parseFloat(pitchSlider.value).toFixed(1) + '°'; sendCurrentTarget(); });
            yawSlider.addEventListener('input', () => { yawValue.textContent = parseFloat(yawSlider.value).toFixed(1) + '°'; sendCurrentTarget(); });

            // Body yaw — the head pose in setTarget is interpreted in world
            // frame (see look_at_world in the Python SDK), so the IK splits
            // the requested world yaw between body rotation and the stewart
            // platform. Mechanical limit: |head_yaw_world − body_yaw| ≤ 65°.
            //
            // To keep that relative yaw constant as the user drags the body
            // slider, we move the head's commanded world yaw by the same
            // delta — head and body rotate together (tank-style). The
            // per-component values are then shipped atomically by
            // sendCurrentTarget().
            const onBodyStart = () => { bodyYawSliderActive = true; };
            const onBodyEnd = () => { bodyYawSliderActive = false; };
            bodyYawSlider.addEventListener('mousedown', onBodyStart);
            bodyYawSlider.addEventListener('touchstart', onBodyStart);
            bodyYawSlider.addEventListener('mouseup', onBodyEnd);
            bodyYawSlider.addEventListener('touchend', onBodyEnd);

            const yawMin = parseFloat(yawSlider.min);
            const yawMax = parseFloat(yawSlider.max);
            bodyYawSlider.addEventListener('input', () => {
                const newBodyDeg = parseFloat(bodyYawSlider.value);
                const delta = newBodyDeg - lastBodyYawDeg;
                // Add the body-yaw delta to the head-yaw slider, clamped
                // to its range. Once the head slider saturates, the head's
                // world yaw stops keeping up with the body, the relative
                // yaw starts to grow, and beyond ~65° the daemon's safe-IK
                // will modulate body_yaw to stay within mechanical limits.
                const newHeadYaw = Math.max(yawMin, Math.min(yawMax,
                    parseFloat(yawSlider.value) + delta));
                yawSlider.value = newHeadYaw;
                yawValue.textContent = newHeadYaw.toFixed(1) + '°';
                bodyYawValue.textContent = newBodyDeg.toFixed(0) + '°';
                sendCurrentTarget();
                lastBodyYawDeg = newBodyDeg;
            });

            rightSlider.addEventListener('input', () => {
                rightAntValue.textContent = rightSlider.value + '°';
                sendCurrentTarget();
            });
            leftSlider.addEventListener('input', () => {
                leftAntValue.textContent = leftSlider.value + '°';
                sendCurrentTarget();
            });
        }

        // ===================== Sound =====================
        function playSound() {
            const file = document.getElementById('soundInput').value.trim();
            if (file) robot.playSound(file);
        }

        function playSoundPreset(file) {
            document.getElementById('soundInput').value = file;
            robot.playSound(file);
        }

        // ===================== Animations =====================
        //
        // Fire-and-forget: the robot plays the full trajectory (~2 s) and
        // we don't await completion. The buttons are briefly disabled
        // during the motion to prevent the user from spamming the same
        // animation on top of itself, using is_move_running from the
        // state event as the authoritative "busy" signal.
        //
        // Staleness detection: if the lib loaded from CDN predates these
        // methods (typeof check), warn instead of silently failing. Same
        // pattern as the volume controls.
        function playWakeUp() {
            // Click receipt log: present so that "no log at all" definitively
            // means the click event never reached this function (button still
            // disabled, stale HTML in browser cache, or redeploy not live).
            console.log('[animations] playWakeUp clicked; robot.state=', robot.state,
                '; robot.wakeUp typeof=', typeof robot.wakeUp);
            if (typeof robot.wakeUp !== 'function') {
                console.warn('robot.wakeUp is not a function — stale JS lib; purge jsdelivr + hard-refresh.');
                return;
            }
            const ok = robot.wakeUp();
            console.log('[animations] robot.wakeUp() returned', ok);
        }

        function playGotoSleep() {
            console.log('[animations] playGotoSleep clicked; robot.state=', robot.state,
                '; robot.gotoSleep typeof=', typeof robot.gotoSleep);
            if (typeof robot.gotoSleep !== 'function') {
                console.warn('robot.gotoSleep is not a function — stale JS lib; purge jsdelivr + hard-refresh.');
                return;
            }
            const ok = robot.gotoSleep();
            console.log('[animations] robot.gotoSleep() returned', ok);
        }

        // ===================== Torque =====================
        //
        // The "current mode" read from the button's dataset is populated by
        // updateTorqueButton() on every state-event. If a user clicks before
        // the first state tick arrives, currentMode is falsy and we default
        // to enabling — the safe-ish choice that matches what wakeUp() would
        // do. The label then self-corrects on the next state tick.
        function toggleTorque() {
            if (typeof robot.setMotorMode !== 'function') {
                console.warn('robot.setMotorMode is not a function — stale JS lib; purge jsdelivr + hard-refresh.');
                return;
            }
            const btn = document.getElementById('btnTorqueToggle');
            const currentMode = btn.dataset.currentMode;
            const next = (currentMode && currentMode !== 'disabled') ? 'disabled' : 'enabled';
            console.log('[torque] toggle click; currentMode=', currentMode, '→ sending', next);
            robot.setMotorMode(next);
            // Optimistic UI update. If the robot rejects or differs, the
            // next state tick (within ~500 ms) will overwrite.
            updateTorqueButton(next);
        }
    </script>
</body>
</html>