location: last_run.location,
            waiting: null,
            beats: last_run.beats,
            ticks: last_run.ticks,
            time: last_run.time,
            depth: 0,
            label: null,
            actors: [],
            choices: [],
            text: '',
            auto: runtime.auto,
            flags: api && api.store && api.store.all ? api.store.all() : {},
        };
    }
    const frame = run.frames[run.frames.length - 1];
    const actors = [];
    for (const [who, rig] of run.rigs) {
        actors.push({
            who,
            pose: rig.pose,
            visible: !!rig.el.visible,
            x: Math.round(rig.el.x),
            y: Math.round(rig.el.y),
            alpha: Number(rig.alpha.toFixed(3)),
            scale: Number(rig.scale.toFixed(3)),
        });
    }
    return {
        running: true,
        id: run.def.id,
        scene: run.def.scene,
        ending: run.ending ? run.ending.id : null,
        ended: run.ended,
        location: run.location,
        waiting: run.wait ? run.wait.kind : null,
        wait_left: run.wait && run.wait.left !== undefined ? Math.round(run.wait.left) : (run.wait ? run.wait.ms : null),
        timers: run.timers.length,
        beats: run.beats,
        ticks: run.ticks,
        time: Math.round(run.time),
        depth: run.frames.length,
        label: labelAt(run, frame),
        actors,
        choices: api && api.dialog && api.dialog.choices ? api.dialog.choices() : [],
        text: api && api.dialog && api.dialog.text ? api.dialog.text() : '',
        auto: runtime.auto,
        flags: api && api.store && api.store.all ? api.store.all() : {},
    };
}

/** Ближайшая метка позади текущей позиции — читаемое «где мы в сценарии». */
function labelAt(state, frame) {
    if (!frame) return null;
    let best = null;
    for (const [name, beat] of state.def.labels) {
        const index = state.def.script.indexOf(beat);
        if (index >= 0 && index < frame.index && (best === null || index > best.index)) best = { name, index };
    }
    return best ? best.name : null;
}

function playTimeline(id, opts) {
    const def = definitions.get(id);
    if (!def) {
        if (ctx && typeof ctx.log === 'function') ctx.log(`$.timeline.play: таймлайн "${id}" не объявлен — см. $.timeline.list()`);
        return false;
    }
    const transition = opts && opts.transition !== undefined ? opts.transition : 'fade';
    if (api.scene && api.scene.current && api.scene.current() !== def.scene) {
        def.pending = { opts: opts || {} };
        api.scene.load(def.scene, { transition });
        return true;
    }
    startRun(def, opts || {});
    return true;
}