bluebey-studio: public/ の外へ移動し非公開化

1 files changed, 3144 insertions, 0 deletions

diff --git a/bluebey-studio/src/panel.js b/bluebey-studio/src/panel.js
new file mode 100644
index 0000000..0ee94ac
--- /dev/null
+++ b/bluebey-studio/src/panel.js
@@ -0,0 +1,3144 @@
+import {
+  h, section as uiSection, subhead, hint, slider, check, segmented, buttons,
+  colorField, xyPad, tailPad, selectField, controlRow, tabs, details, toast, icon, svgIcon,
+} from './ui.js';
+import {
+  FACE_PRESETS, POSE_PRESETS, THEMES, BUBBLE_STYLES, CAPTION_PRESETS,
+  defaultState, applyPatch, BEARD_KIND_DEFAULTS, HEAD_MARK_KIND_DEFAULTS,
+} from './presets.js';
+import { STYLE_DEFS } from './styles.js';
+import { ENVIRONMENTS } from './look.js';
+import { BACKGROUND_PRESETS, EFFECT_PRESETS } from './background.js';
+import { PROP_LIBRARY, applyPropFaceScale, applyPropText } from './props.js';
+import { HAT_LIBRARY } from './hats.js';
+import {
+  GION_SHEETS, gionSheetUrl, cropFromMarquee, fitSheet, normalizeRect, clamp, DEFAULT_STAMP_WIDTH,
+} from './gion.js';
+
+/**
+ * A small icon for each section heading, so the list a tab shows can be scanned
+ * at a glance. Keyed by the section title; a title with no icon just shows text.
+ */
+const SECTION_ICONS = {
+  'ポーズ例': 'M12 3.6a2.1 2.1 0 1 1 0 4.2 2.1 2.1 0 1 1 0-4.2ZM12 7.8v6.4M12 10.3 8.4 12.5M12 10.3l3.6 2.2M12 14.2 9 20.4M12 14.2l3 6.2',
+  '全身とボーンのスライダー': 'M4 7h16M4 12h16M4 17h16M8 7h.01M15 12h.01M11 17h.01',
+  '操作': 'M7 4l10 6-4.3 1.3L10.8 16 7 4Z',
+  'うごき': 'M8 5l10 7-10 7V5Z',
+  'プリセット': 'M12 3.6a8.4 8.4 0 1 1 0 16.8 8.4 8.4 0 1 1 0-16.8ZM8.9 9.8v1M15.1 9.8v1M8.3 13.9a4.7 4.7 0 0 0 7.4 0',
+  '目': 'M2.5 12s3.6-6 9.5-6 9.5 6 9.5 6-3.6 6-9.5 6-9.5-6-9.5-6ZM12 14.6a2.6 2.6 0 1 0 0-5.2 2.6 2.6 0 0 0 0 5.2Z',
+  '眉': 'M4 11q3.2-3.2 7-2M13 9q3.8-1.2 7 2',
+  '眼鏡・サングラス': 'M8 10.2a3.2 3.2 0 1 0 0 6.4 3.2 3.2 0 0 0 0-6.4ZM16 10.2a3.2 3.2 0 1 0 0 6.4 3.2 3.2 0 0 0 0-6.4ZM11.2 13h1.6M4.8 11.7 3 10.3M19.2 11.7 21 10.3',
+  '髪': 'M4 14c0-4.8 3.6-7.6 8-7.6s8 2.8 8 7.6M4 14c2.6-1.4 5.3-1.9 8-1.8M20 14c-2.6-1.4-5.3-1.9-8-1.8',
+  'ほっぺ': 'M6.4 14.6a2 1.4 0 1 0 0 .01ZM17.6 14.6a2 1.4 0 1 0 0 .01ZM12 4a8 8 0 1 0 0 16 8 8 0 0 0 0-16Z',
+  '鼻ちょうちん': 'M15 4.6a4.6 4.6 0 1 0 0 9.2 4.6 4.6 0 0 0 0-9.2ZM10.6 9.6 4.8 11.4',
+  'ひげ': 'M4.4 11.2c2.6-1.2 5.2-.6 7.6 2 2.4-2.6 5-3.2 7.6-2',
+  '口': 'M4.6 10c3 4.8 11.8 4.8 14.8 0',
+  '口パク（声は出ません）': 'M4 9v6h3l4 3V6L7 9H4ZM15.5 9.5l4 5M19.5 9.5l-4 5',
+  '見る先': 'M12 3.5v3M12 17.5v3M3.5 12h3M17.5 12h3M12 8.2a3.8 3.8 0 1 0 0 7.6 3.8 3.8 0 0 0 0-7.6Z',
+  'スタイル': 'M4 20l3.4-.8L20 6.6 17.4 4 4.8 16.6 4 20Z',
+  '体の色': 'M12 3.4s6 6.2 6 10.1a6 6 0 0 1-12 0C6 9.6 12 3.4 12 3.4Z',
+  '見た目の調整': 'M4 8h16M4 16h16M9.5 8h.01M15 16h.01',
+  '背景': 'M4 4.5h16a1.5 1.5 0 0 1 1.5 1.5v12a1.5 1.5 0 0 1-1.5 1.5H4A1.5 1.5 0 0 1 2.5 18V6A1.5 1.5 0 0 1 4 4.5ZM3 16l4-3.5 3.6 3 3.1-2.8 4.3 3.7M15.8 8.8h.01',
+  '舞台': 'M4 20V9l8-5 8 5v11M4 20h16M9.5 20v-5h5v5',
+  'セリフ（フキダシ）': 'M4 5h16v10H9l-4 4v-4H4V5Z',
+  '画面・光': 'M12 7.5a4.5 4.5 0 1 0 0 9 4.5 4.5 0 0 0 0-9ZM12 2.5v2M12 19.5v2M2.5 12h2M19.5 12h2M5.2 5.2l1.4 1.4M17.4 17.4l1.4 1.4M18.8 5.2l-1.4 1.4M6.6 17.4 5.2 18.8',
+  '画面の情報': 'M12 4a8 8 0 1 0 0 16 8 8 0 0 0 0-16ZM12 11v5M12 8h.01',
+  '画像': 'M4 5h16v14H4zM4 15l5-4 4 3 4-3.5 3 2.5M15.5 9h.01',
+  'まんが': 'M4 4h7v7H4zM13 4h7v7h-7zM4 13h7v7H4zM13 13h7v7h-7z',
+  '共有': 'M8.2 10.6a2 2 0 1 0 0-3.2 2 2 0 0 0 0 3.2ZM17 6.4a2 2 0 1 0 0-3.2 2 2 0 0 0 0 3.2ZM17 20.8a2 2 0 1 0 0-3.2 2 2 0 0 0 0 3.2ZM10 10.4l5-2.6M10 13.6l5 2.6',
+  'テクスチャの下地を書き出す': 'M4 4h16v16H4zM4 9.3h16M4 14.7h16M9.3 4v16M14.7 4v16',
+  '設定': 'M12 8.6a3.4 3.4 0 1 0 0 6.8 3.4 3.4 0 0 0 0-6.8ZM12 2.6v2.4M12 19v2.4M2.6 12H5M19 12h2.4M5.2 5.2l1.7 1.7M17.1 17.1l1.7 1.7M18.8 5.2l-1.7 1.7M6.9 17.1l-1.7 1.7',
+};
+
+/** `section`, with the heading icon looked up from its title. */
+const section = (parent, title, options) => uiSection(parent, title, { icon: SECTION_ICONS[title], ...options });
+
+/** Fallbacks for the fields an older settings file may predate. */
+const BODY_COLOR_FALLBACKS = {
+  body: '#c8b0f0', accent: '#8a4fe0', nose: '#7a4fb0',
+  leaf: '#a6dd6a', vein: '#7fbf3f', feet: '#7a4fb0',
+};
+const CAPTION_SLIDER_FALLBACKS = {
+  fontSize: 34, lineHeight: 1.42, padding: 18, radius: 24, borderWidth: 4,
+};
+const CAPTION_COLOR_FALLBACKS = { textColor: '#3f2b52', bubbleColor: '#ffffff', borderColor: '#55386e' };
+const MOUTH_FLAP_FALLBACKS = { rate: 1, mouthGain: 1 };
+const LOOK_AT_FALLBACKS = { x: 0, y: 2.6, z: 3, amount: 1 };
+
+/**
+ * The licence reminder the three image-import buttons show before they open the
+ * file picker. Kept in one place so the wording can change without hunting for
+ * each button.
+ */
+const IMAGE_LICENSE_NOTICE = '読み込む画像は、ご自身で権利をお持ちか、利用許諾のあるものに限ります。ライセンスをご確認ください。';
+
+/** True when the user confirmed they have the right to use the image. */
+function confirmImageLicense() {
+  return window.confirm(IMAGE_LICENSE_NOTICE);
+}
+
+/**
+ * The panel had no multi-line field, and the two features that take free prose
+ * (the caption and the spoken text) want the same shape, so it is built once
+ * here rather than growing the widget kit for a single caller.
+ */
+function textArea({ label, value = '', rows = 3, onChange }) {
+  const input = h('textarea', {
+    rows,
+    style: {
+      width: '100%',
+      boxSizing: 'border-box',
+      resize: 'vertical',
+      font: 'inherit',
+      fontFamily: 'ui-monospace, "Hiragino Kaku Gothic ProN", "Noto Sans JP", monospace',
+      fontSize: '11.5px',
+      lineHeight: '1.5',
+      padding: '6px 8px',
+      border: '1px solid #e4dff0',
+      borderRadius: '8px',
+      background: '#fff',
+      color: '#2b2433',
+    },
+  });
+  input.value = value ?? '';
+  input.addEventListener('input', () => onChange?.(input.value));
+  return {
+    el: controlRow(label, input, { wide: true }),
+    // Assigning the same text again would jump the caret to the end, so only
+    // write when the value actually differs.
+    set(v) { const next = v ?? ''; if (input.value !== next) input.value = next; },
+    get: () => input.value,
+  };
+}
+
+/**
+ * The placed prop groups, in state order.
+ *
+ * WHY this climbs the scene: the app owns the prop rebuild (see `applyProps` in
+ * src/main.js) and hands `props.js` only the whole-prop scale, so a sign's
+ * per-item `faceScale` has to be re-applied to the freshly built mesh by the one
+ * place that knows that value - this panel. There is no direct scene reference
+ * here, so this walks up from the model's container and collects the props: they
+ * are the only objects tagged `userData.propId`, and the app adds them in order.
+ */
+function placedPropGroups(app) {
+  const scene = app.container?.parent;
+  if (!scene) return [];
+  const groups = [];
+  scene.traverse((object) => {
+    if (object.userData?.propId) groups.push(object);
+  });
+  return groups;
+}
+
+/**
+ * Builds the whole control panel and wires it to the app state.
+ *
+ * Widgets never call the heavy "apply everything" path while they are being
+ * dragged; they patch one scope and ask the app to refresh just that part.
+ */
+export function buildPanel(app, root) {
+  const state = app.state;
+  const model = app.model;
+  const rig = app.rig;
+
+  const syncers = [];
+  const boneSyncers = [];
+  const sync = () => { for (const fn of syncers) fn(); };
+  const syncBones = () => { for (const fn of boneSyncers) fn(); };
+
+  /**
+   * Grey out (and disable) a control whose setting has no effect in the current
+   * mode - e.g. the brow's angle while the brow is a loaded picture.
+   */
+  const setRowEnabled = (widget, on) => {
+    const row = widget.el.closest?.('.row') ?? widget.el;
+    const input = row.querySelector?.('input, select, button');
+    if (input) input.disabled = !on;
+    row.classList?.toggle('is-off', !on);
+  };
+
+  /** Patch one scope of the state without re-reading the whole UI. */
+  /** Replace the state and re-read every widget (used by presets and loads). */
+  const replace = (value, scope = 'all') => app.actions.applyState(value, { scope, sync: true });
+
+  root.replaceChildren();
+
+  // --- randomising ----------------------------------------------------------
+  // Shared by 「顔をランダムに」 (face tab) and 「すべてをランダムに」 (the top bar).
+  const rnd = (min, max) => min + (max - min) * Math.random();
+  const pick = (list) => list[Math.floor(Math.random() * list.length)];
+  const randomEye = () => ({
+    open: +rnd(0.4, 1).toFixed(2),
+    lookX: +rnd(-0.35, 0.35).toFixed(2),
+    lookY: +rnd(-0.25, 0.25).toFixed(2),
+    eyeX: Math.round(rnd(-16, 16)),
+  });
+  const randomGlasses = () => {
+    const kind = pick(['glasses', 'sunglasses']);
+    const dark = kind === 'sunglasses';
+    return {
+      enabled: true,
+      kind,
+      frameColor: pick(['#2a1e33', '#12101a', '#7a5c2e', '#c9c2d6']),
+      lensColor: pick(['#2b2433', '#1a1620', '#3a2f4a', '#7a3b1e']),
+      lensOpacity: dark ? +rnd(0.85, 1).toFixed(2) : +rnd(0, 0.35).toFixed(2),
+      lensGap: Math.round(rnd(-24, 56)),
+      frameWidth: +rnd(0.6, 1.8).toFixed(2),
+      scale: +rnd(0.9, 1.15).toFixed(2),
+      offsetY: Math.round(rnd(-18, 18)),
+      tilt: Math.round(rnd(-12, 12)),
+    };
+  };
+  const randomBeard = (shape) => {
+    const base = BEARD_KIND_DEFAULTS[shape] ?? { size: 1, offsetY: 0, spacing: 0 };
+    if (shape === 'off') return { shape };
+    return {
+      shape,
+      ...base,
+      size: +((base.size ?? 1) * rnd(0.8, 1.25)).toFixed(2),
+      offsetY: Math.round((base.offsetY ?? 0) + rnd(-16, 16)),
+    };
+  };
+  const randomHeadMark = () => {
+    const shape = pick(['off', 'cap', 'fringe', 'fringe-up', 'curve']);
+    return { shape, ...(HEAD_MARK_KIND_DEFAULTS[shape] ?? {}) };
+  };
+  const randomFacePatch = () => {
+    const beardShape = pick(['off', 'scotch', 'kaiser', 'cat']);
+    return {
+      eyes: {
+        left: randomEye(),
+        right: randomEye(),
+        cheeks: { enabled: Math.random() < 0.5 },
+        // 眼鏡・サングラスも要素に含める（かける／かけない、各種設定）。
+        glasses: Math.random() < 0.5 ? { enabled: false } : randomGlasses(),
+        beard: randomBeard(beardShape),
+        headMark: randomHeadMark(),
+      brow: {
+        enabled: true,
+        // Random brows are line drawings, never ゴル風's loaded picture.
+        image: false,
+        angle: Math.round(rnd(-30, 40)),
+        height: Math.round(rnd(-10, 50)),
+        length: +rnd(0.6, 2.6).toFixed(2),
+        thickness: +rnd(1.2, 3.4).toFixed(2),
+        curve: +rnd(0, 0.3).toFixed(2),
+        spacing: Math.round(rnd(-120, 30)),
+        taper: +rnd(0, 1).toFixed(2),
+      },
+    },
+    // The mouth takes the height and the tilt too, so the face really changes.
+    mouth: {
+      smile: +rnd(-1, 1.2).toFixed(2),
+      // ときどき丸く開く口（O）にする。
+      round: Math.random() < 0.3 ? +rnd(0.35, 1).toFixed(2) : 0,
+      open: +rnd(0, 0.5).toFixed(2),
+      width: +rnd(0.7, 1.3).toFixed(2),
+      thickness: +rnd(0.7, 1.6).toFixed(2),
+      tilt: Math.round(rnd(-12, 12)),
+      offsetY: Math.round(rnd(-16, 16)),
+    },
+    };
+  };
+  const randomFace = () => replace({ face: randomFacePatch() }, 'face');
+  const randomAll = () => {
+    // 後ろを向く（180°）や大きく傾くポーズは避ける。見える顔が変わる範囲だけ。
+    const poses = POSE_PRESETS.filter((preset) => {
+      const m = preset.pose?.bones?.master ?? [0, 0, 0];
+      return Math.abs(m[0]) <= 45 && Math.abs(m[1]) <= 40 && Math.abs(m[2]) <= 40;
+    });
+    const pose = pick(poses.length ? poses : POSE_PRESETS);
+    const theme = pick(THEMES);
+    app.actions.applyPosePreset?.(pose.id);
+    app.actions.applyTheme?.(theme.id);
+    // The viewer style (実写／フラット／線画) and 左右反転 are deliberately left alone.
+    replace({ face: randomFacePatch() }, 'face');
+    sync();
+  };
+
+  // A small action bar above the tabs: undo/redo apply to every tab, so they must
+  // not be buried inside one of them. 「すべてをランダムに」 sits here too.
+  const topBar = h('div', { class: 'panel-topbar' });
+  const iconButton = (label, d, onClick) => {
+    const button = h('button', { type: 'button', class: 'icon-btn', title: label, 'aria-label': label });
+    button.append(icon(d));
+    button.addEventListener('click', onClick);
+    return button;
+  };
+  topBar.append(
+    iconButton('元に戻す', 'M4.8 11.5h9.7a5.2 5.2 0 0 1 0 10.4h-3.6M4.8 11.5 9.6 6.7M4.8 11.5 9.6 16.3', () => app.actions.undo()),
+    iconButton('やり直す', 'M19.2 11.5h-9.7a5.2 5.2 0 0 0 0 10.4h3.6M19.2 11.5 14.4 6.7M19.2 11.5 14.4 16.3', () => app.actions.redo()),
+    iconButton('すべてをランダムに', 'M7.2 9.4a2.6 2.6 0 1 1 3.9 2.3c-.9.5-1.3 1.2-1.3 2.1v.4M9.2 17.4h.01M16.8 6.8v6.1M16.8 15.6h.01', () => randomAll()),
+  );
+  root.append(topBar);
+
+  // Tabs instead of one long scroll: the panel used to be a wall of controls,
+  // and everything is easier to find this way. Each tab is a small stroke icon
+  // (its name is the tooltip and the accessible label) sitting on the top edge
+  // of the content, so the row reads as tabs rather than buttons.
+  const tabBar = tabs(root, [
+    {
+      id: 'pose',
+      label: 'ポーズ',
+      // A standing figure: head, body, arms and legs.
+      icon: 'M12 3.6a2.1 2.1 0 1 1 0 4.2 2.1 2.1 0 1 1 0-4.2ZM12 7.8v6.4M12 10.3 8.4 12.5M12 10.3l3.6 2.2M12 14.2 9 20.4M12 14.2l3 6.2',
+    },
+    {
+      id: 'face',
+      label: '顔',
+      // A smiley face: an outline, two eyes and a smile.
+      icon: 'M12 3.6a8.4 8.4 0 1 1 0 16.8 8.4 8.4 0 1 1 0-16.8ZM8.9 9.8v1M15.1 9.8v1M8.3 13.9a4.7 4.7 0 0 0 7.4 0',
+    },
+    {
+      id: 'view',
+      label: '見た目',
+      // A painter's palette: the outline, the thumb hole and four colour dots.
+      icon: 'M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10c.9 0 1.6-.7 1.6-1.7 0-.4-.2-.8-.4-1.1-.3-.3-.4-.7-.4-1.1a1.6 1.6 0 0 1 1.7-1.7h2c3 0 5.5-2.5 5.5-5.6C22 6 17.5 2 12 2ZM13.5 6.5h.01M17.5 10.5h.01M8.5 7.5h.01M6.5 12.5h.01',
+    },
+    {
+      id: 'scene',
+      label: 'シーン',
+      // A framed picture: background, stage and light all sit inside the frame.
+      icon: 'M4 4.5h16a1.5 1.5 0 0 1 1.5 1.5v12a1.5 1.5 0 0 1-1.5 1.5H4A1.5 1.5 0 0 1 2.5 18V6A1.5 1.5 0 0 1 4 4.5ZM3 16l4-3.5 3.6 3 3.1-2.8 4.3 3.7M15.8 8.8h.01',
+    },
+    {
+      id: 'export',
+      label: '書き出し',
+      // A download arrow dropping into a tray.
+      icon: 'M12 3.8v9.6M8.2 9.8 12 13.6l3.8-3.8M4.5 16.5v1.6a1.8 1.8 0 0 0 1.8 1.8h11.4a1.8 1.8 0 0 0 1.8-1.8v-1.6',
+    },
+  ]);
+  const tabPose = tabBar.panels.pose;
+  const tabFace = tabBar.panels.face;
+  const tabView = tabBar.panels.view;
+  const tabScene = tabBar.panels.scene;
+  const tabExport = tabBar.panels.export;
+
+  /* ------------------------------------------------------------------ pose */
+
+  // ポーズ例: ready-made poses, because most people start by picking one.
+  const posePresetSection = section(tabPose, 'ポーズ例');
+  posePresetSection.add(buttons({
+    items: POSE_PRESETS.map((preset) => ({
+      id: preset.id,
+      label: preset.label,
+      onClick: () => applyPosePreset(preset),
+    })),
+  }));
+
+  // 全身とボーンのスライダー: pick a bone, then turn it on the three axes.
+  const poseSection = section(tabPose, '全身とボーンのスライダー');
+
+  const boneList = h('div', { class: 'bone-list' });
+  const boneButtons = new Map();
+  for (const bone of model.bones) {
+    const button = h('button', { type: 'button', class: 'bone-item' },
+      h('span', { text: bone.label }),
+      h('small', { text: bone.name }));
+    button.addEventListener('click', () => rig.select(bone.name));
+    boneButtons.set(bone.name, button);
+    boneList.append(button);
+  }
+  poseSection.add(controlRow(null, boneList, { wide: true }));
+
+  const axisSliders = {
+    x: slider({ label: 'よこ（X）', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => setAxis('x', v) }),
+    y: slider({ label: 'たて（Y）', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => setAxis('y', v) }),
+    z: slider({ label: 'ねじり（Z）', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => setAxis('z', v) }),
+  };
+  for (const widget of Object.values(axisSliders)) poseSection.add(widget.el);
+
+  function setAxis(axis, value) {
+    const name = rig.selected;
+    if (!name) return;
+    const delta = rig.getDelta(name);
+    delta[axis] = value;
+    rig.setDelta(name, delta);
+    app.actions.capturePose();
+    app.needsRender = true;
+  }
+
+  poseSection.add(hint('ボーンは上の一覧から選びます。スライダーは「休めの姿勢からの差」です。'
+    + 'ビューポートのぶるべーは、ドラッグで移動、Shift＋ドラッグで向きを変えられます。'));
+
+  // こまかい設定: the whole-body nudge and the rotation gizmo are tweaks, not the
+  // main way in, so they stay folded away inside the bone section.
+  const rootSliders = [
+    { label: 'よこ移動', min: -20, max: 20 },
+    { label: 'たて移動', min: -10, max: 20 },
+    { label: 'おくゆき', min: -20, max: 20 },
+  ].map(({ label, min, max }, index) => slider({
+    label, min, max, step: 0.01, value: 0,
+    format: (v) => v.toFixed(2),
+    onInput: (v) => { state.pose.root[index] = v; app.needsRender = true; },
+  }));
+  const poseBox = details(poseSection.body, 'こまかい設定（ぜんたいをずらす・回転ギズモ）');
+  for (const widget of rootSliders) poseBox.add(widget.el);
+
+  const gizmoToggle = check({
+    label: '回転ギズモを表示',
+    // Off by default: the rings belong to the model's surface, so having them
+    // drawn on top of the character is not what you want while composing a
+    // picture. The 'g' key toggles it too.
+    value: false,
+    onChange: (value) => { rig.setGizmoVisible(value); app.needsRender = true; },
+  });
+  poseBox.add(controlRow(null, gizmoToggle.el, { wide: true }));
+
+  // --- 操作 -----------------------------------------------------------------
+  // Deliberately NOT wrapped in a collapsible section: 「ポーズを全部戻す」 and the
+  // undo/redo pair are used often enough that they should be on screen without
+  // opening anything first.
+  tabPose.append(buttons({
+    items: [
+      { id: 'resetBone', label: 'このボーンを戻す', onClick: () => { rig.reset(rig.selected); app.actions.capturePose(); syncBones(); app.needsRender = true; } },
+      { id: 'resetAll', label: 'ポーズを全部戻す', onClick: () => app.actions.resetPose() },
+      { id: 'random', label: '少しランダムに', onClick: () => randomPose() },
+    ],
+  }).el);
+  tabPose.append(hint('「元に戻す」「やり直す」は、パネル上部のアイコンにあります（どのタブでも使えます）。'));
+
+  /** Accepts a preset object (from the buttons) or a preset id (from tools). */
+  function applyPosePreset(presetOrId) {
+    const preset = typeof presetOrId === 'string'
+      ? POSE_PRESETS.find((item) => item.id === presetOrId)
+      : presetOrId;
+    if (!preset) return;
+    // Some poses already raise the arms; leaving the てをふる motion running would
+    // add to the arm the pose just set and fold the flipper over the face, so
+    // switching to any pose stops that motion.
+    if (state.anim.mode === 'wave') {
+      state.anim.mode = 'off';
+      app.animator.reset();
+      app.needsRender = true;
+    }
+    state.pose = { bones: {}, root: [0, 0, 0] };
+    applyPatch(state.pose, preset.pose ?? {});
+    if (!state.pose.root) state.pose.root = [0, 0, 0];
+    replace({}, 'pose');
+    sync();
+  }
+
+  function randomPose() {
+    const names = model.bones.map((bone) => bone.name);
+    for (const name of names) {
+      if (name === 'master') continue;
+      const scale = name.startsWith('arm') ? 22 : 12;
+      rig.setDelta(name, {
+        x: (Math.random() - 0.5) * scale,
+        y: (Math.random() - 0.5) * scale,
+        z: (Math.random() - 0.5) * scale,
+      });
+    }
+    app.actions.capturePose();
+    syncBones();
+    app.needsRender = true;
+  }
+
+  /* ------------------------------------------------------------------ face */
+
+  let faceSection = section(tabFace, 'プリセット');
+
+  // The face tab's sections are created here in the order they should read on
+  // screen (プリセット -> 髪 -> 眉 -> 目 -> 見る先 -> ...), but filled further
+  // down where the widgets are built: the DOM order is fixed at creation.
+  const faceTabSections = {
+    hair: section(tabFace, '髪'),
+    brow: section(tabFace, '眉'),
+    eye: section(tabFace, '目'),
+    look: section(tabFace, '見る先'),
+    glasses: section(tabFace, '眼鏡・サングラス'),
+    cheeks: section(tabFace, 'ほっぺ'),
+    snot: section(tabFace, '鼻ちょうちん'),
+    beard: section(tabFace, 'ひげ'),
+    mouth: section(tabFace, '口'),
+  };
+
+  faceSection.add(buttons({
+    items: FACE_PRESETS.map((preset) => ({
+      id: preset.id,
+      label: preset.label,
+      onClick: () => applyFacePreset(preset.id),
+    })),
+  }));
+
+  function applyFacePreset(id) {
+    const preset = FACE_PRESETS.find((item) => item.id === id);
+    if (!preset) return;
+    state.face = defaultState().face;
+    applyPatch(state.face, preset.face);
+    app.actions.refresh('face');
+    sync();
+  }
+
+  // --- eyes
+  faceSection = faceTabSections.eye;
+
+  /** Tear sliders, which are added to the こまかい設定 box once it exists. */
+  const tearWidgets = [];
+  // The link switch sits directly above the *left* eye's open slider, because that
+  // is the slider it drives - it was previously below both eyes, where it looked
+  // like it belonged to whatever came next.
+  const linkedToggle = check({
+    label: '左右を連動させる',
+    value: true,
+    onChange: (value) => {
+      state.face.eyes.linked = value;
+      if (value) {
+        // Catch the two eyes up with each other, so switching the link on does
+        // something visible even if they had drifted apart.
+        state.face.eyes.right.open = state.face.eyes.left.open;
+        state.face.eyes.right.closed = state.face.eyes.left.closed;
+        state.face.eyes.right.closedLines = state.face.eyes.left.closedLines;
+        state.face.eyes.right.irisShape = state.face.eyes.left.irisShape;
+        state.face.eyes.right.shape = state.face.eyes.left.shape;
+        // The lids are per eye now too, so link them along with the rest.
+        state.face.eyes.right.lowerLid = state.face.eyes.left.lowerLid;
+        state.face.eyes.right.lidShape = state.face.eyes.left.lidShape;
+        state.face.eyes.right.lidWidth = state.face.eyes.left.lidWidth;
+        state.face.eyes.right.lidTilt = state.face.eyes.left.lidTilt;
+        state.face.eyes.right.lashes = state.face.eyes.left.lashes;
+        state.face.eyes.right.lashAngle = state.face.eyes.left.lashAngle;
+        state.face.eyes.right.lashPos = state.face.eyes.left.lashPos;
+        state.face.eyes.right.white = state.face.eyes.left.white ?? null;
+        state.face.eyes.right.highlight = state.face.eyes.left.highlight ?? null;
+        state.face.eyes.right.lookX = state.face.eyes.left.lookX;
+        state.face.eyes.right.lookY = state.face.eyes.left.lookY;
+        // The tears mirror as a pair: the size and the height match, while the
+        // sideways position and the tilt flip sign.
+        state.face.eyes.right.tear = state.face.eyes.left.tear ?? 0;
+        state.face.eyes.right.tearY = state.face.eyes.left.tearY ?? 0;
+        state.face.eyes.right.tearX = -(state.face.eyes.left.tearX ?? 0);
+        state.face.eyes.right.tearTilt = -(state.face.eyes.left.tearTilt ?? 0);
+      }
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  // The eye "shape" folds the old 閉じ方 (line/3/わらう) and the heart pupil into
+  // one menu. `open`/`closed`/`irisShape` stay the stored fields; this reads and
+  // writes them together so the menu always shows the current look.
+  const eyeShapeOf = (eye) => {
+    const shape = eye.shape;
+    const explicitShut = shape === 'three' || shape === 'arch'
+      || (typeof shape === 'string' && shape.startsWith('line'));
+    if (explicitShut) return shape;
+    if ((eye.open ?? 1) <= 0.02) {
+      if (!shape) {
+        if (eye.closed === 'three') return 'three';
+        if (eye.closed === 'arch') return 'arch';
+        return `line${Math.min(3, Math.max(1, Math.round(eye.closedLines ?? 1)))}`;
+      }
+      // An open/heart eye whose lid is all the way down is just a blink.
+      return 'line1';
+    }
+    if (shape) return shape;
+    return (eye.irisShape ?? 'circle') === 'heart' ? 'heart' : 'open';
+  };
+  const applyEyeShape = (eye, value) => {
+    eye.shape = value;
+    eye.irisShape = value === 'heart' ? 'heart' : 'circle';
+    if (value === 'open' || value === 'heart') {
+      eye.open = 1;
+      // Clear any stale shut fields so a blink (open -> 0) shows a plain line and
+      // never the 3 or the arch that was picked before.
+      eye.closed = 'line';
+      eye.closedLines = 1;
+      return;
+    }
+    // A shut artwork is drawn as the eye's content with the lids open; the lid
+    // height is its own slider (上まぶたの高さ), so selecting one opens the lid.
+    eye.open = 1;
+    if (value.startsWith('line')) {
+      eye.closed = 'line';
+      eye.closedLines = Number(value.slice(4)) || 1;
+      return;
+    }
+    eye.closed = value;
+  };
+  const eyeWhiteOf = (eye) => {
+    if (eye.white != null) return eye.white === true;
+    // The usual: an open eye shows its white; a shut eye or a heart does not.
+    return eyeShapeOf(eye) === 'open';
+  };
+  const eyeHighlightOf = (eye) => (eye.highlight != null
+    ? eye.highlight === true
+    : state.face.eyes.highlight !== false);
+
+  const EYE_ICONS = {
+    both: '<circle cx="7" cy="12" r="3.8"/><circle cx="17" cy="12" r="3.8"/><circle cx="7" cy="12" r="1.3" fill="currentColor" stroke="none"/><circle cx="17" cy="12" r="1.3" fill="currentColor" stroke="none"/>',
+    left: '<path d="M3 12h4"/><path d="M5 9.5l2.5 2.5-2.5 2.5"/><circle cx="15" cy="12" r="3.8"/><circle cx="15" cy="12" r="1.3" fill="currentColor" stroke="none"/>',
+    right: '<path d="M21 12h-4"/><path d="M19 9.5l-2.5 2.5 2.5 2.5"/><circle cx="9" cy="12" r="3.8"/><circle cx="9" cy="12" r="1.3" fill="currentColor" stroke="none"/>',
+    lid: '<path d="M3 14c2.5-6.5 15.5-6.5 18 0"/><path d="M6 16v3M12 16v3M18 16v3"/>',
+  };
+  // Each eye group carries the same controls. Linked, one group ("両目") drives
+  // both eyes; unlinked, a group per eye appears and the gaze pad doubles.
+  const eyeGroup = (title, icon = null) => {
+    const body = h('div', { class: 'eye-group-body' });
+    const head = h('div', { class: 'eye-group-head' },
+      icon ? svgIcon(EYE_ICONS[icon] ?? '') : null,
+      h('span', { text: title }));
+    const el = h('div', { class: 'eye-group' }, head, body);
+    return {
+      el,
+      add: (child) => (body.append(child?.el ?? child), child),
+      setVisible: (visible) => { el.style.display = visible ? '' : 'none'; },
+    };
+  };
+
+  const makeEyeControls = (mode) => {
+    const keys = mode === 'both' ? ['left', 'right'] : [mode];
+    const primary = keys[0];
+    const write = (fn) => { for (const k of keys) fn(state.face.eyes[k]); };
+    const touched = () => { app.actions.refresh('face'); sync(); };
+    const group = eyeGroup(mode === 'both' ? '両目' : (mode === 'left' ? '左目' : '右目'), mode);
+
+    // --- まぶた (per eye) ------------------------------------------------
+    // 上まぶたの高さ and 下まぶたの高さ share one opening, so each is held to the
+    // other: the lower lid cannot rise past the upper, and the upper cannot drop
+    // below the lower. The sliders' own limits are kept in step in `syncOne`.
+    const lidSub = eyeGroup('まぶた', 'lid');
+    const open = slider({
+      label: '上まぶたの高さ', min: 0, max: 1, step: 0.01, value: 1,
+      format: (v) => (v < 0.02 ? '閉じ' : v > 0.98 ? '開き' : `${Math.round(v * 100)}%`),
+      onInput: (v) => {
+        const floor = state.face.eyes[primary].lowerLid ?? state.face.eyes.lowerLid ?? 0;
+        const vv = Math.max(v, floor);
+        write((e) => { e.open = vv; });
+        if (vv !== v) open.set(vv);
+        touched();
+      },
+    });
+    const lowerLid = slider({
+      label: '下まぶたの高さ', min: 0, max: 1, step: 0.01, value: 0, format: (v) => v.toFixed(2),
+      onInput: (v) => {
+        const ceil = state.face.eyes[primary].open ?? 1;
+        const vv = Math.min(v, ceil);
+        write((e) => { e.lowerLid = vv; });
+        if (vv !== v) lowerLid.set(vv);
+        touched();
+      },
+    });
+    const lidShape = segmented({
+      label: 'まぶたの形',
+      options: [
+        { value: 'curve', label: '曲線' },
+        { value: 'flat', label: '直線（平ら）' },
+      ],
+      value: 'curve',
+      onChange: (v) => { write((e) => { e.lidShape = v; }); touched(); },
+    });
+    const lidWidth = slider({
+      label: 'まぶたの太さ', min: 0, max: 30, step: 1, value: 14, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { write((e) => { e.lidWidth = v; }); touched(); },
+    });
+    const lidTilt = slider({
+      label: 'まぶたの傾き', min: -40, max: 40, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { write((e) => { e.lidTilt = v; }); touched(); },
+    });
+    const lashes = check({
+      label: 'まつげをつける',
+      value: false,
+      onChange: (v) => { write((e) => { e.lashes = v; }); touched(); },
+    });
+    const lashAngle = slider({
+      label: 'まつげの角度', min: -80, max: 80, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { write((e) => { e.lashAngle = v; }); touched(); },
+    });
+    const lashPos = slider({
+      label: 'まつげの位置', min: -80, max: 80, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { write((e) => { e.lashPos = v; }); touched(); },
+    });
+    lidSub.add(lidShape);
+    lidSub.add(open);
+    lidSub.add(lowerLid);
+    lidSub.add(lidWidth);
+    lidSub.add(lidTilt);
+    lidSub.add(controlRow(null, lashes.el, { wide: true }));
+    lidSub.add(lashAngle);
+    lidSub.add(lashPos);
+    group.add(lidSub);
+    const openInput = open.el.querySelector('input');
+    const lowerLidInput = lowerLid.el.querySelector('input');
+
+    // 目の形: the artwork the eye shows. A shut shape is drawn with the lids open,
+    // so 上まぶたの高さ can then be lowered onto it.
+    const shape = segmented({
+      label: '目の形',
+      options: [
+        { value: 'open', label: 'ふつう' },
+        { value: 'line1', label: '1線' },
+        { value: 'line2', label: '2線' },
+        { value: 'line3', label: '3線' },
+        { value: 'three', label: '３の目' },
+        { value: 'arch', label: 'わらう' },
+        { value: 'heart', label: 'ハート' },
+      ],
+      value: 'open',
+      onChange: (v) => { write((e) => applyEyeShape(e, v)); touched(); },
+    });
+    // The heart colour only matters for the heart, so it sits right under 目の形
+    // and shows only then.
+    const heartColor = colorField({
+      label: 'ハートの色', value: '#e0344f',
+      swatches: ['#e0344f', '#ff5f8f', '#c2185b', '#150e1b'],
+      onChange: (v) => { state.face.eyes.heartColor = v; touched(); },
+    });
+    // 大きさ: one knob for the iris, the heart and the shut artwork.
+    const size = slider({
+      label: '大きさ', min: 0.4, max: 1.8, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.irisScale = v; touched(); },
+    });
+    const threeFlip = segmented({
+      label: '３の向き',
+      options: [
+        { value: 'normal', label: '３' },
+        { value: 'flip', label: '３（逆）' },
+      ],
+      value: 'normal',
+      onChange: (v) => { write((e) => { e.threeFlip = v === 'flip'; applyEyeShape(e, 'three'); }); touched(); },
+    });
+    const white = check({
+      label: '白目を出す',
+      value: true,
+      onChange: (v) => { write((e) => { e.white = v; }); touched(); },
+    });
+    const highlight = check({
+      label: '光彩（瞳の白い丸）を出す',
+      value: true,
+      onChange: (v) => { write((e) => { e.highlight = v; }); touched(); },
+    });
+    const pad = xyPad({
+      value: { x: 0, y: 0 },
+      center: 'eye',
+      onChange: ({ x, y }) => { write((e) => { e.lookX = x; e.lookY = y; }); touched(); },
+    });
+    // 涙: per eye. Linked, one set drives both - size and height match, while the
+    // sideways position and the tilt mirror so the pair stays symmetric.
+    const tearOn = check({
+      label: '涙を出す',
+      value: false,
+      onChange: (v) => { write((e) => { e.tearOn = v; }); touched(); },
+    });
+    const writeTear = (patch) => {
+      Object.assign(state.face.eyes[primary], patch);
+      if (mode === 'both') {
+        const mirrored = { ...patch };
+        if (patch.tearX != null) mirrored.tearX = -patch.tearX;
+        if (patch.tearTilt != null) mirrored.tearTilt = -patch.tearTilt;
+        Object.assign(state.face.eyes[primary === 'left' ? 'right' : 'left'], mirrored);
+      }
+      touched();
+    };
+    const tear = slider({
+      label: '涙の大きさ', min: 0.3, max: 1.6, step: 0.01, value: 0.3, format: (v) => v.toFixed(2),
+      onInput: (v) => writeTear({ tear: v }),
+    });
+    const tearY = slider({
+      label: '涙の高さ', min: -80, max: 140, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => writeTear({ tearY: v }),
+    });
+    const tearX = slider({
+      label: '涙のよこ位置', min: -150, max: 150, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => writeTear({ tearX: v }),
+    });
+    const tearTilt = slider({
+      label: '涙の傾き', min: -60, max: 60, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => writeTear({ tearTilt: v }),
+    });
+
+    group.add(shape);
+    group.add(heartColor);
+    group.add(size);
+    group.add(threeFlip);
+    group.add(controlRow(null, white.el, { wide: true }));
+    group.add(controlRow(null, highlight.el, { wide: true }));
+    group.add(controlRow(null, tearOn.el, { wide: true }));
+    group.add(tear);
+    group.add(tearY);
+    group.add(tearX);
+    group.add(tearTilt);
+    group.add(controlRow('目線', h('div', { class: 'pad-wrap' }, pad.el,
+      h('p', { class: 'hint', text: 'ドラッグで目線。ダブルクリックで正面に戻ります。' }))));
+
+    const syncOne = () => {
+      const e = state.face.eyes[primary];
+      const shapeValue = eyeShapeOf(e);
+      const lower = e.lowerLid ?? state.face.eyes.lowerLid ?? 0;
+      const upper = e.open ?? 1;
+      // Keep each lid's slider range from crossing the other before applying the
+      // values, so the displayed thumb cannot sit past the other lid either.
+      if (openInput) openInput.min = String(Math.min(lower, upper));
+      if (lowerLidInput) lowerLidInput.max = String(Math.max(lower, upper));
+      open.set(upper);
+      lowerLid.set(lower);
+      lidShape.set(e.lidShape ?? state.face.eyes.lidShape ?? 'curve');
+      lidWidth.set(e.lidWidth ?? state.face.eyes.lidWidth ?? 14);
+      lidTilt.set(e.lidTilt ?? state.face.eyes.lidTilt ?? 0);
+      lashes.set((e.lashes ?? state.face.eyes.lashes) === true);
+      const lashesOn = (e.lashes ?? state.face.eyes.lashes) === true;
+      lashAngle.set(e.lashAngle ?? state.face.eyes.lashAngle ?? 0);
+      lashPos.set(e.lashPos ?? state.face.eyes.lashPos ?? 0);
+      lashAngle.el.style.display = lashesOn ? '' : 'none';
+      lashPos.el.style.display = lashesOn ? '' : 'none';
+      shape.set(shapeValue);
+      heartColor.set(state.face.eyes.heartColor ?? '#e0344f');
+      heartColor.el.style.display = shapeValue === 'heart' ? '' : 'none';
+      size.set(state.face.eyes.irisScale ?? 1);
+      threeFlip.set(e.threeFlip ? 'flip' : 'normal');
+      threeFlip.el.style.display = shapeValue === 'three' ? '' : 'none';
+      white.set(eyeWhiteOf(e));
+      highlight.set(eyeHighlightOf(e));
+      const tearShown = e.tearOn === true;
+      tearOn.set(tearShown);
+      for (const widget of [tear, tearY, tearX, tearTilt]) {
+        widget.el.style.display = tearShown ? '' : 'none';
+      }
+      tear.set(e.tear ?? 0.3);
+      tearY.set(e.tearY ?? 0);
+      tearX.set(e.tearX ?? 0);
+      tearTilt.set(e.tearTilt ?? 0);
+      pad.set({ x: e.lookX ?? 0, y: e.lookY ?? 0 });
+    };
+    return { group, sync: syncOne };
+  };
+
+  const bothControls = makeEyeControls('both');
+  const leftControls = makeEyeControls('left');
+  const rightControls = makeEyeControls('right');
+
+  faceSection.add(controlRow(null, linkedToggle.el, { wide: true }));
+  faceSection.add(bothControls.group);
+  faceSection.add(leftControls.group);
+  faceSection.add(rightControls.group);
+  faceSection.add(hint('「目の形」の「2線」「3線」は端点がつながった形になります。'
+    + '閉じ目の形も、上まぶた・下まぶたで上下から隠せます。'));
+
+  // 横位置 (per eye) rarely changes, so it gets its own small box.
+  const eyeAdvancedWidgets = {};
+  for (const key of ['left', 'right']) {
+    const label = key === 'left' ? '左目' : '右目';
+    const eyeX = slider({
+      label: `${label}の横位置`, min: -200, max: 200, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (value) => { state.face.eyes[key].eyeX = value; app.actions.refresh('face'); },
+    });
+    eyeAdvancedWidgets[key] = { eyeX };
+    tearWidgets.push(eyeX.el);
+  }
+
+  // One button to put every eye setting back to the artwork's defaults. The
+  // artwork *source* is kept: resetting the numbers should not throw away a
+  // hand-drawn image the user loaded.
+  faceSection.add(buttons({
+    items: [{
+      id: 'eyesReset',
+      label: '目の設定をリセット',
+      onClick: () => {
+        const source = state.face.eyes.source;
+        state.face.eyes = { ...defaultState().face.eyes, source };
+        app.actions.refresh('face');
+        sync();
+      },
+    }],
+  }));
+
+  faceSection.add(hint('「まぶた」は目のグループごとに設定できます。「左右を連動させる」を入れると「両目」の設定が1つだけ出て、'
+    + 'まぶた・目の形・大きさ・白目・光彩・目線が両目でそろいます。'
+    + 'はずすと「左目」「右目」の設定がそれぞれに出て、目線のパッドも2つになります。'
+    + '「左目」「右目」は、ぶるべー自身から見た左右です（正面から見ると、画面では左右が入れ替わって見えます）。'));
+
+  const eyeColors = {
+    white: colorField({ label: '白目', value: '#ffffff', onChange: (v) => { state.face.eyes.white = v; app.actions.refresh('face'); } }),
+    iris: colorField({ label: '瞳', value: '#150e1b', onChange: (v) => { state.face.eyes.iris = v; app.actions.refresh('face'); } }),
+    line: colorField({ label: 'まぶたの線', value: '#55386e', onChange: (v) => { state.face.eyes.line = v; app.actions.refresh('face'); } }),
+  };
+  const eyeColorBox = details(faceSection.body, '色（白目・瞳・まぶたの線）');
+  for (const widget of Object.values(eyeColors)) eyeColorBox.add(widget.el);
+
+  // 横位置 (per eye) is rarely used, so it stays in its own small box.
+  const tearBox = details(faceSection.body, '横位置（左右べつ）');
+  for (const el of tearWidgets) tearBox.add(el);
+
+  // --- eyebrows (the original character has none; this is extra range)
+  faceSection = faceTabSections.brow;
+  faceSection.add(hint('ぶるべーには眉がありません。怒った顔など、必要なときだけ出してください。'));
+
+  const browToggle = check({
+    label: '眉を表示',
+    value: false,
+    onChange: (value) => { state.face.eyes.brow.enabled = value; app.actions.refresh('face'); },
+  });
+  faceSection.add(controlRow(null, browToggle.el, { wide: true }));
+
+  const browSliders = {
+    angle: slider({
+      label: '角度', min: -40, max: 40, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.face.eyes.brow.angle = v; app.actions.refresh('face'); },
+    }),
+    height: slider({
+      label: '高さ', min: -40, max: 80, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.brow.height = v; app.actions.refresh('face'); },
+    }),
+    length: slider({
+      label: '長さ', min: 0, max: 4, step: 0.01, value: 1,
+      format: (v) => (v < 0.02 ? '点' : v.toFixed(2)),
+      onInput: (v) => { state.face.eyes.brow.length = v; app.actions.refresh('face'); },
+    }),
+    thickness: slider({
+      label: '太さ', min: 0.4, max: 3.5, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.brow.thickness = v; app.actions.refresh('face'); },
+    }),
+    spacing: slider({
+      label: '間隔', min: -220, max: 60, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.brow.spacing = v; app.actions.refresh('face'); },
+    }),
+    curve: slider({
+      label: '曲がり', min: 0, max: 0.4, step: 0.01, value: 0.14, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.brow.curve = v; app.actions.refresh('face'); },
+    }),
+    taper: slider({
+      label: '鼻側の細さ', min: 0, max: 1, step: 0.01, value: 1,
+      format: (v) => (v >= 0.995 ? 'そのまま' : (v <= 0.005 ? 'とがる' : v.toFixed(2))),
+      onInput: (v) => { state.face.eyes.brow.taper = v; app.actions.refresh('face'); },
+    }),
+  };
+  faceSection.add(hint('＋の角度で内側が下がり、怒った感じになります。－で困り顔。'
+    + '高さは ＋ で上がり、－ にすると目にかくれて見えなくなります。'));
+  faceSection.add(browSliders.angle.el);
+  const browBox = details(faceSection.body, 'こまかい設定（高さ・長さ・太さ・色）');
+  browBox.add(browSliders.height.el);
+  browBox.add(browSliders.length.el);
+  browBox.add(browSliders.thickness.el);
+  browBox.add(browSliders.spacing.el);
+  browBox.add(browSliders.curve.el);
+  browBox.add(browSliders.taper.el);
+  const browColor = colorField({
+    label: '眉の色', value: '#55386e',
+    swatches: ['#55386e', '#2a1e33', '#7a5c2e', '#8a4a5e'],
+    onChange: (v) => { state.face.eyes.brow.color = v; app.actions.refresh('face'); },
+  });
+  browBox.add(browColor.el);
+  browBox.add(hint('「間隔」は左右の眉のへだたりです（＋で広がり、－で内側に寄って、'
+    + '大きく－にすると左右がくっつきます）。「長さ」を 0 にすると点になります。'
+    + '「鼻側の細さ」を 0 にすると鼻側がとがります。'));
+  browBox.add(buttons({
+    items: [
+      {
+        id: 'golgo',
+        label: 'ゴル風（画像）',
+        onClick: () => {
+          // ゴルゴ13: a very thick, almost straight black wedge, wide at the outer
+          // end and tapering to a point at the nose, angled steeply down towards
+          // it, with the two brows sitting close together.
+          Object.assign(state.face.eyes.brow, {
+            enabled: true,
+            image: true,
+            angle: 34,
+            height: 33,
+            length: 2.82,
+            thickness: 3.6,
+            curve: 0,
+            taper: 0,
+            spacing: -59,
+            color: '#2a1e33',
+          });
+          app.actions.refresh('face');
+          sync();
+        },
+      },
+      {
+        id: 'ryotsu',
+        label: '両風（線の眉）',
+        onClick: () => {
+          // 両津勘吉: thick げじげじ brows that are joined in the middle, sitting
+          // low over the eyes. `spacing` is what closes the gap - at this length
+          // the two inner ends meet over the nose (see the panel's note). Turning
+          // `image` off is what makes the line drawing take over from ゴル風's
+          // loaded picture.
+          Object.assign(state.face.eyes.brow, {
+            enabled: true,
+            image: false,
+            angle: 10,
+            height: 4,
+            length: 2.86,
+            thickness: 3.29,
+            curve: 0.4,
+            taper: 1,
+            spacing: -50,
+            color: '#181220',
+          });
+          app.actions.refresh('face');
+          sync();
+        },
+      },
+    ],
+  }));
+
+  faceSection.add(hint('「ゴル風（画像）」は読み込んだ画像（assets/brows/gol-right.png）で眉を描きます。'
+    + '画像のときは角度・太さ・曲がり・鼻側の細さが効かないので、灰色になります。'
+    + '「両風（線の眉）」など線で描く眉に切り替えると、この画像は使われません。'));
+
+  // --- glasses / sunglasses (drawn into the same texture as the eyes and brows)
+  faceSection = faceTabSections.glasses;
+  faceSection.add(hint('眼鏡やサングラスを、目や眉と同じ絵にかけます。'
+    + '線画のときはレンズを塗らず、フレームの線だけになります。'));
+
+  // 眼鏡とサングラスの違いは、レンズの形だけではない。サングラスはレンズが不透明
+  // なので、目を開けたままだと瞳が透けて見えてしまう。種類を変えたらその種類の
+  // 既定値（レンズの色・濃さ・高さ）を一緒に持ってきて、サングラスのときは両目を
+  // 閉じる。フレームや大きさには触らないので、作りこんだフレームは種類を変えても
+  // 失われない。
+  const GLASSES_KINDS = {
+    glasses: { lensColor: '#2b2433', lensOpacity: 0.22, offsetY: 0 },
+    sunglasses: { lensColor: '#1a1620', lensOpacity: 1, offsetY: -40 },
+  };
+  const wearSunglasses = () => {
+    state.face.eyes.glasses.lensOpacity = 1;
+    state.face.eyes.left.open = 0;
+    state.face.eyes.right.open = 0;
+  };
+  const setGlassesKind = (kind) => {
+    Object.assign(state.face.eyes.glasses, { kind, ...GLASSES_KINDS[kind] });
+    // サングラス hides the eye behind an opaque lens, so both eyes shut with it;
+    // 眼鏡's lens is clear, so switching back opens them again.
+    const open = kind === 'sunglasses' ? 0 : 1;
+    state.face.eyes.left.open = open;
+    state.face.eyes.right.open = open;
+  };
+
+  const glassesToggle = check({
+    label: '眼鏡をかける',
+    value: false,
+    onChange: (value) => {
+      state.face.eyes.glasses.enabled = value;
+      // A loaded state can already be on サングラス, so enabling the shades also
+      // shuts the eyes rather than showing them through the opaque lens.
+      if (value && state.face.eyes.glasses.kind === 'sunglasses') wearSunglasses();
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  faceSection.add(controlRow(null, glassesToggle.el, { wide: true }));
+
+  const glassesKindSegment = segmented({
+    label: '種類',
+    options: [
+      { value: 'glasses', label: '眼鏡' },
+      { value: 'sunglasses', label: 'サングラス' },
+    ],
+    value: 'glasses',
+    onChange: (value) => {
+      setGlassesKind(value);
+      // Picking a kind means you mean to wear it, so put the glasses on rather
+      // than leaving the checkbox off and nothing showing on the face.
+      state.face.eyes.glasses.enabled = true;
+      glassesToggle.set(true);
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  faceSection.add(glassesKindSegment.el);
+
+  const glassesSliders = {
+    scale: slider({
+      label: '大きさ', min: 0.7, max: 1.5, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.glasses.scale = v; app.actions.refresh('face'); },
+    }),
+    lensOpacity: slider({
+      label: 'レンズの濃さ', min: 0, max: 1, step: 0.01, value: 0.22,
+      format: (v) => (v <= 0.005 ? '透明' : v.toFixed(2)),
+      onInput: (v) => { state.face.eyes.glasses.lensOpacity = v; app.actions.refresh('face'); },
+    }),
+    lensGap: slider({
+      label: '左右レンズの間隔', min: -40, max: 120, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.glasses.lensGap = v; app.actions.refresh('face'); },
+    }),
+    frameWidth: slider({
+      label: 'フレームの太さ', min: 0.2, max: 3, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.glasses.frameWidth = v; app.actions.refresh('face'); },
+    }),
+    offsetY: slider({
+      label: '高さ', min: -60, max: 60, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.glasses.offsetY = v; app.actions.refresh('face'); },
+    }),
+    tilt: slider({
+      label: '傾き', min: -30, max: 30, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.face.eyes.glasses.tilt = v; app.actions.refresh('face'); },
+    }),
+  };
+  faceSection.add(glassesSliders.scale.el);
+  faceSection.add(glassesSliders.lensOpacity.el);
+  const glassesBox = details(faceSection.body, 'こまかい設定（フレーム・位置・色）');
+  glassesBox.add(glassesSliders.frameWidth.el);
+  glassesBox.add(glassesSliders.offsetY.el);
+  glassesBox.add(glassesSliders.tilt.el);
+  glassesBox.add(glassesSliders.lensGap.el);
+  const glassesFrameColor = colorField({
+    label: 'フレームの色', value: '#2a1e33',
+    swatches: ['#2a1e33', '#12101a', '#7a5c2e', '#c9c2d6'],
+    onChange: (v) => { state.face.eyes.glasses.frameColor = v; app.actions.refresh('face'); },
+  });
+  const glassesLensColor = colorField({
+    label: 'レンズの色', value: '#2b2433',
+    swatches: ['#2b2433', '#1a1620', '#3a2f4a', '#7a3b1e'],
+    onChange: (v) => { state.face.eyes.glasses.lensColor = v; app.actions.refresh('face'); },
+  });
+  glassesBox.add(glassesFrameColor.el);
+  glassesBox.add(glassesLensColor.el);
+  glassesBox.add(hint('「レンズの濃さ」を 0 にするとレンズは透明になり、フレームだけの眼鏡になります。'
+    + '「高さ」は眼鏡全体を上下に動かします（＋で下がります）。'
+    + '「傾き」は左右のレンズが一緒に傾きます。'));
+  glassesBox.add(buttons({
+    items: [
+      {
+        id: 'glasses',
+        label: '眼鏡',
+        onClick: () => {
+          setGlassesKind('glasses');
+          state.face.eyes.glasses.enabled = true;
+          app.actions.refresh('face');
+          sync();
+        },
+      },
+      {
+        id: 'sunglasses',
+        label: 'サングラス',
+        onClick: () => {
+          setGlassesKind('sunglasses');
+          state.face.eyes.glasses.enabled = true;
+          app.actions.refresh('face');
+          sync();
+        },
+      },
+    ],
+  }));
+
+  // --- ほっぺ (a manga blush)
+  faceSection = faceTabSections.cheeks;
+  faceSection.add(hint('ほっぺ（マンガの赤らみ）を、目や眉と同じ絵にかけます。'
+    + '決まったキャラクターの絵ではなく、よくあるマンガの記号として用意しました。'
+    + 'はじめは出ていません。'));
+
+  const cheeksToggle = check({
+    label: 'ほっぺを出す',
+    value: false,
+    onChange: (value) => { state.face.eyes.cheeks.enabled = value; app.actions.refresh('face'); },
+  });
+  faceSection.add(controlRow(null, cheeksToggle.el, { wide: true }));
+
+  const cheekSliders = {
+    size: slider({
+      label: '大きさ', min: 0.4, max: 2.2, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.cheeks.size = v; app.actions.refresh('face'); },
+    }),
+    offsetY: slider({
+      label: 'たかさ', min: -80, max: 120, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.cheeks.offsetY = v; app.actions.refresh('face'); },
+    }),
+    spacing: slider({
+      label: 'よこの間隔', min: -60, max: 80, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.cheeks.spacing = v; app.actions.refresh('face'); },
+    }),
+  };
+  faceSection.add(cheekSliders.size.el);
+  const cheekBox = details(faceSection.body, 'こまかい設定（位置・色）');
+  cheekBox.add(cheekSliders.offsetY.el);
+  cheekBox.add(cheekSliders.spacing.el);
+  const cheekColor = colorField({
+    label: 'ほっぺの色', value: '#f6a6b8',
+    swatches: ['#f6a6b8', '#f19ab0', '#f7b9a0', '#e88aa8'],
+    onChange: (v) => { state.face.eyes.cheeks.color = v; app.actions.refresh('face'); },
+  });
+  cheekBox.add(cheekColor.el);
+  cheekBox.add(hint('線はいつも4本です。「よこの間隔」は左右のほっぺのへだたり、'
+    + '「たかさ」は目からの下がり具合です。'));
+
+  // --- 髪 (a hair-like covering over the whole head; its own section, above 眉)
+  faceSection = faceTabSections.hair;
+  faceSection.add(hint('髪を頭にかぶせます。決まったキャラクターの髪ではなく、'
+    + 'よくあるマンガの形として用意しました。はじめは出ていません。'));
+
+  const headMarkShape = segmented({
+    label: '髪',
+    options: [
+      { value: 'off', label: 'なし' },
+      { value: 'cap', label: 'かぶせ' },
+      { value: 'fringe', label: 'ぎざぎざ' },
+      { value: 'fringe-up', label: 'はちわれ' },
+      { value: 'curve', label: 'カーブ' },
+    ],
+    value: 'off',
+    onChange: (value) => {
+      const mark = state.face.eyes.headMark;
+      mark.shape = value;
+      // Entering a shape applies its own starting size (ぎざぎざ is smaller and
+      // shallower than the shared defaults). Other shapes just keep the values.
+      Object.assign(mark, HEAD_MARK_KIND_DEFAULTS[value] ?? {});
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  faceSection.add(headMarkShape.el);
+
+  const headMarkOverEyes = check({
+    label: '髪を目の前に出す',
+    value: true,
+    onChange: (value) => { state.face.eyes.headMark.overEyes = value; app.actions.refresh('face'); },
+  });
+  faceSection.add(controlRow(null, headMarkOverEyes.el, { wide: true }));
+
+  const headMarkSliders = {
+    size: slider({
+      label: '大きさ', min: 0.05, max: 2.2, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.headMark.size = v; app.actions.refresh('face'); },
+    }),
+    teeth: slider({
+      label: '歯の深さ', min: 0.02, max: 0.4, step: 0.01, value: 0.12, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.headMark.teeth = v; app.actions.refresh('face'); },
+    }),
+    offsetX: slider({
+      label: 'よこの位置', min: -260, max: 260, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.headMark.offsetX = v; app.actions.refresh('face'); },
+    }),
+    offsetY: slider({
+      label: 'たかさ', min: -300, max: 300, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.headMark.offsetY = v; app.actions.refresh('face'); },
+    }),
+  };
+  faceSection.add(headMarkSliders.size.el);
+  faceSection.add(headMarkSliders.teeth.el);
+  //「歯の深さ」はぎざぎざのときだけ意味があるので、それ以外では隠します。
+  const headMarkBox = details(faceSection.body, 'こまかい設定（位置・色）');
+  headMarkBox.add(headMarkSliders.offsetX.el);
+  headMarkBox.add(headMarkSliders.offsetY.el);
+  const headMarkColor = colorField({
+    label: '髪の色', value: '#8a4fe0',
+    swatches: ['#8a4fe0', '#2a1e33', '#e0344f', '#7a5c2e'],
+    onChange: (v) => { state.face.eyes.headMark.color = v; app.actions.refresh('face'); },
+  });
+  const headMarkColor2 = colorField({
+    label: '2色目', value: '#ffffff',
+    swatches: ['#ffffff', '#f3ead9', '#ffe08a', '#7fd8ff'],
+    onChange: (v) => { state.face.eyes.headMark.color2 = v; app.actions.refresh('face'); },
+  });
+  headMarkBox.add(headMarkColor.el);
+  headMarkBox.add(headMarkColor2.el);
+  headMarkBox.add(hint('「かぶせ」は頭にかぶせる丸い髪、「ぎざぎざ」は生え際がギザギザにとがった髪（「歯の深さ」でギザギザの深さを変えられます）、'
+    + '「はちわれ」は中央が鋭く持ち上がった生え際、「カーブ」はドラえもんのように単純にカーブした髪です。'
+    + '「たかさ」で生え際を目の中心あたりまで下げられます。'
+    + '「髪を目の前に出す」を切ると、髪が目の後ろに回ります。'));
+
+  // --- 鼻ちょうちん: the snot bubble of a sleeping face.
+  faceSection = faceTabSections.snot;
+  const snotToggle = check({
+    label: '鼻ちょうちんを出す',
+    value: false,
+    onChange: (value) => { state.face.eyes.snot.enabled = value; app.actions.refresh('face'); },
+  });
+  faceSection.add(controlRow(null, snotToggle.el, { wide: true }));
+  const snotSize = slider({
+    label: '大きさ', min: 0.4, max: 2.2, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.face.eyes.snot.size = v; app.actions.refresh('face'); },
+  });
+  faceSection.add(snotSize.el);
+  const snotBox = details(faceSection.body, 'こまかい設定（位置・色）');
+  const snotSliders = {
+    offsetX: slider({
+      label: 'よこの位置', min: -160, max: 160, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.snot.offsetX = v; app.actions.refresh('face'); },
+    }),
+    offsetY: slider({
+      label: 'たかさ', min: -160, max: 160, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.snot.offsetY = v; app.actions.refresh('face'); },
+    }),
+    offsetZ: slider({
+      label: 'おくゆき', min: -10, max: 160, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.snot.offsetZ = v; app.actions.refresh('face'); },
+    }),
+  };
+  for (const widget of Object.values(snotSliders)) snotBox.add(widget.el);
+  const snotColor = colorField({
+    label: '泡の色', value: '#e3ecff',
+    swatches: ['#e3ecff', '#ffffff', '#cfe0ff', '#bfe8d0'],
+    onChange: (v) => { state.face.eyes.snot.color = v; app.actions.refresh('face'); },
+  });
+  snotBox.add(snotColor.el);
+  snotBox.add(hint('寝ている顔の横に、鼻から出る泡を描きます。'
+    + '「ねている」ポーズと組み合わせると、いねむりしているように見えます。'
+    + '泡は鼻の横に出るので、位置は「よこの位置」「たかさ」で調整できます。'));
+
+  // --- ひげ: mustaches and beards, hung under the nose.
+  faceSection = faceTabSections.beard;
+  const beardShape = segmented({
+    label: 'ひげ',
+    options: [
+      { value: 'off', label: 'なし' },
+      { value: 'scotch', label: 'ちょびひげ' },
+      { value: 'kaiser', label: 'ダリ' },
+      { value: 'cat', label: 'ねこ' },
+    ],
+    value: 'off',
+    onChange: (value) => {
+      const beard = state.face.eyes.beard;
+      beard.shape = value;
+      // Each kind starts at its own size and height (a textured kind is drawn at a
+      // different scale from the built-in strokes). A kind with no entry resets to
+      // the neutral values, so switching kinds cannot leave a stray size behind.
+      Object.assign(beard, BEARD_KIND_DEFAULTS[value] ?? { size: 1, offsetY: 0, spacing: 0 });
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  faceSection.add(beardShape.el);
+  const beardSliders = {
+    size: slider({
+      label: '大きさ', min: 0.4, max: 2.4, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.beard.size = v; app.actions.refresh('face'); },
+    }),
+    spacing: slider({
+      label: '左右の間隔', min: 0, max: 250, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      // Shown 10 higher than the value stored, so the default (stored -10) reads 0.
+      onInput: (v) => { state.face.eyes.beard.spacing = v - 10; app.actions.refresh('face'); },
+    }),
+    offsetY: slider({
+      label: 'たかさ', min: -160, max: 160, step: 1, value: 0, format: (v) => `${Math.round(v)}`,
+      onInput: (v) => { state.face.eyes.beard.offsetY = v; app.actions.refresh('face'); },
+    }),
+    length: slider({
+      label: 'ひげの長さ（ねこ）', min: 0.2, max: 3, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.beard.length = v; app.actions.refresh('face'); },
+    }),
+    lineGap: slider({
+      label: '線の間隔（ねこ）', min: 0.2, max: 3, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.eyes.beard.lineGap = v; app.actions.refresh('face'); },
+    }),
+  };
+  faceSection.add(beardSliders.size.el);
+  const beardBox = details(faceSection.body, 'こまかい設定（位置・色）');
+  beardBox.add(beardSliders.spacing.el);
+  beardBox.add(beardSliders.offsetY.el);
+  beardBox.add(beardSliders.length.el);
+  beardBox.add(beardSliders.lineGap.el);
+  const beardColor = colorField({
+    label: 'ひげの色', value: '#1c1624',
+    swatches: ['#1c1624', '#000000', '#3a2a4a', '#6b4a2a', '#8a8a94'],
+    onChange: (v) => { state.face.eyes.beard.color = v; app.actions.refresh('face'); },
+  });
+  beardBox.add(beardColor.el);
+  beardBox.add(hint('鼻の下に、ちょびひげ・ダリ・ねこ、の瓢を描きます。'
+    + '「左右の間隔」「瓢の長さ」「線の間隔」は「ねこ」で使います。'));
+
+  // --- mouth
+  faceSection = faceTabSections.mouth;
+
+  const mouthToggle = check({
+    label: '口を表示',
+    value: true,
+    onChange: (value) => { state.face.mouth.visible = value; app.actions.refresh('face'); },
+  });
+  faceSection.add(controlRow(null, mouthToggle.el, { wide: true }));
+
+  // 口角の角度は「笑いの深さ」に比例して動かす（笑いの深さ 1 で -8°、-1 で 70°、
+  // その間は直線）。笑いの深さを動かすと追従し、手で微調整したいときのために
+  // スライダー自体は残してある。
+  const cornerAngleFor = (smile) => Math.round(31 - 39 * Math.max(-1, Math.min(1.4, smile)));
+
+  const mouthSliders = {
+    smile: slider({ label: '曲げ', min: -1, max: 1.4, step: 0.01, value: 1, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.smile = v; state.face.mouth.cornerAngle = cornerAngleFor(v); app.actions.refresh('face'); sync(); } }),
+    open: slider({ label: '開き', min: 0, max: 1, step: 0.01, value: 0, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.open = v; app.actions.refresh('face'); } }),
+    round: slider({ label: 'Oの大きさ', min: 0, max: 1, step: 0.01, value: 0, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.round = v; app.actions.refresh('face'); } }),
+    width: slider({ label: '幅', min: 0.2, max: 1.6, step: 0.01, value: 1, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.width = v; app.actions.refresh('face'); } }),
+    thickness: slider({ label: '太さ', min: 0.2, max: 3, step: 0.01, value: 1, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.thickness = v; app.actions.refresh('face'); } }),
+    tilt: slider({ label: '傾き', min: -30, max: 30, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => { state.face.mouth.tilt = v; app.actions.refresh('face'); } }),
+    offsetY: slider({ label: '高さ', min: -140, max: 140, step: 1, value: 0, format: (v) => `${Math.round(v)}`, onInput: (v) => { state.face.mouth.offsetY = v; app.actions.refresh('face'); } }),
+    tongue: slider({ label: '舌の大きさ', min: 0, max: 1.6, step: 0.01, value: 0.96, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.tongue = v; app.actions.refresh('face'); } }),
+    tonguePos: slider({ label: '舌の位置', min: 0.05, max: 0.95, step: 0.01, value: 0.84, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.tonguePos = v; app.actions.refresh('face'); } }),
+    corners: slider({ label: '口角の長さ', min: 0, max: 1.6, step: 0.01, value: 0.71, format: (v) => v.toFixed(2), onInput: (v) => { state.face.mouth.corners = v; app.actions.refresh('face'); } }),
+    cornerAngle: slider({ label: '口角の角度', min: -70, max: 70, step: 1, value: -8, format: (v) => `${Math.round(v)}°`, onInput: (v) => { state.face.mouth.cornerAngle = v; app.actions.refresh('face'); } }),
+  };
+  // 口には「ふつうの口」と「丸く開く（O）」の2つの形があり、使うスライダーが
+  // まったく違う。形を切り替えると、その形で使うものだけを出す。
+  const mouthModeOf = (mouth) => (mouth.round > 0.004 ? 'round' : 'curve');
+  const mouthRowKeys = {
+    curve: ['smile', 'width', 'thickness', 'open', 'tongue', 'tonguePos', 'corners', 'cornerAngle', 'tilt', 'offsetY'],
+    round: ['round', 'width', 'thickness', 'tongue', 'tilt', 'offsetY'],
+  };
+  // DOM order is fixed here; the mode only shows or hides rows.
+  const mouthRowOrder = ['round', 'smile', 'width', 'thickness', 'open', 'tilt', 'offsetY', 'tongue', 'tonguePos', 'corners', 'cornerAngle'];
+  const mouthMode = segmented({
+    label: '口の形',
+    options: [
+      { value: 'curve', label: 'ふつうの口' },
+      { value: 'round', label: '丸く開く（O）' },
+    ],
+    value: 'curve',
+    onChange: (shape) => {
+      if (shape === 'round') {
+        if (!(state.face.mouth.round > 0.004)) state.face.mouth.round = 0.6;
+      } else {
+        state.face.mouth.round = 0;
+      }
+      app.actions.refresh('face');
+      sync();
+    },
+  });
+  faceSection.add(mouthMode);
+  for (const key of mouthRowOrder) faceSection.add(mouthSliders[key].el);
+  faceSection.add(hint('「口の形」を切り替えると、その形で使うスライダーだけが出ます。'
+    + 'ふつうの口は「曲げ」と「開き」、丸く開く口（O）は「Oの大きさ」で形が決まります。'));
+  faceSection.add(buttons({
+    items: [{
+      id: 'mouthreset',
+      label: '口を初期値に戻す',
+      onClick: () => {
+        state.face.mouth = defaultState().face.mouth;
+        app.actions.refresh('face');
+        sync();
+      },
+    }],
+  }));
+
+  const mouthColors = {
+    color: colorField({ label: '口の線', value: '#ff1a44', onChange: (v) => { state.face.mouth.color = v; app.actions.refresh('face'); } }),
+    innerColor: colorField({ label: '口の中', value: '#4a0f1e', onChange: (v) => { state.face.mouth.innerColor = v; app.actions.refresh('face'); } }),
+    tongueColor: colorField({ label: '舌', value: '#ff2d2d', onChange: (v) => { state.face.mouth.tongueColor = v; app.actions.refresh('face'); } }),
+    cornerColor: colorField({ label: '口角', value: '#725497', onChange: (v) => { state.face.mouth.cornerColor = v; app.actions.refresh('face'); } }),
+  };
+  const mouthColorBox = details(faceSection.body, '色（口の線・中・舌・口角）');
+  for (const widget of Object.values(mouthColors)) mouthColorBox.add(widget.el);
+
+  /* ---------------------------------------------------------------- caption */
+
+  const captionSection = section(tabScene, 'セリフ（フキダシ）');
+
+  // Two bubbles share this one set of controls: the selector says which bubble
+  // they are editing, and every handler below reads the active one when it runs,
+  // so switching does not have to rewire anything.
+  let activeCaption = 'caption';
+  const cap = () => state[activeCaption];
+  const captionBubbleSegment = segmented({
+    label: 'どの吹き出し',
+    options: [
+      { value: 'caption', label: '①' },
+      { value: 'caption2', label: '②' },
+      { value: 'narration', label: 'ナレーション' },
+    ],
+    value: 'caption',
+    onChange: (value) => { activeCaption = value; sync(); },
+  });
+  captionSection.add(captionBubbleSegment.el);
+  captionSection.add(hint('吹き出しは①と②の2つ、ナレーション枠が1つ出せます。切り替えて、それぞれ別の位置・形・色・縦書きにできます。'));
+
+  const captionToggle = check({
+    label: 'この吹き出しを出す',
+    value: false,
+    onChange: (value) => { cap().enabled = value; app.actions.refresh('caption'); sync(); },
+  });
+  captionSection.add(controlRow(null, captionToggle.el, { wide: true }));
+
+  const captionText = textArea({
+    label: 'セリフ',
+    value: '',
+    rows: 3,
+    onChange: (value) => { cap().text = value; app.actions.refresh('caption'); },
+  });
+  captionSection.add(captionText.el);
+
+  const verticalToggle = check({
+    label: '縦書きにする',
+    value: false,
+    onChange: (v) => { cap().vertical = v; app.actions.refresh('caption'); sync(); },
+  });
+  captionSection.add(controlRow(null, verticalToggle.el, { wide: true }));
+
+  captionSection.add(buttons({
+    label: '例',
+    items: CAPTION_PRESETS.map((preset) => ({
+      id: preset.id,
+      label: preset.label,
+      onClick: () => { Object.assign(cap(), preset.caption); app.actions.refresh('caption'); sync(); },
+    })),
+  }));
+
+  const bubbleSegment = segmented({
+    label: '形',
+    options: BUBBLE_STYLES,
+    value: 'round',
+    onChange: (value) => { cap().bubble = value; app.actions.refresh('caption'); },
+  });
+  const tailSegment = tailPad({
+    label: 'しっぽ',
+    value: 'left',
+    onChange: (value) => { cap().tail = value; app.actions.refresh('caption'); },
+  });
+  captionSection.add(bubbleSegment.el);
+  captionSection.add(tailSegment.el);
+
+  const captionSliders = {
+    fontSize: slider({
+      label: '文字の大きさ', min: 16, max: 72, step: 1, value: 34, format: (v) => `${Math.round(v)}px`,
+      onInput: (v) => { cap().fontSize = v; app.actions.refresh('caption'); },
+    }),
+    lineHeight: slider({
+      label: '行の高さ', min: 1, max: 2, step: 0.01, value: 1.42, format: (v) => v.toFixed(2),
+      onInput: (v) => { cap().lineHeight = v; app.actions.refresh('caption'); },
+    }),
+    padding: slider({
+      label: '内側の余白', min: 4, max: 40, step: 1, value: 18, format: (v) => `${Math.round(v)}px`,
+      onInput: (v) => { cap().padding = v; app.actions.refresh('caption'); },
+    }),
+    radius: slider({
+      label: '角の丸み', min: 0, max: 60, step: 1, value: 24, format: (v) => `${Math.round(v)}px`,
+      onInput: (v) => { cap().radius = v; app.actions.refresh('caption'); },
+    }),
+    borderWidth: slider({
+      label: '線の太さ', min: 0, max: 12, step: 0.5, value: 4, format: (v) => `${v.toFixed(1)}px`,
+      onInput: (v) => { cap().borderWidth = v; app.actions.refresh('caption'); },
+    }),
+  };
+  for (const widget of Object.values(captionSliders)) captionSection.add(widget.el);
+
+  const captionPosition = {
+    x: slider({
+      label: '横位置', min: 0, max: 1, step: 0.01, value: 0.58, format: (v) => v.toFixed(2),
+      onInput: (v) => { cap().x = v; app.actions.refresh('caption'); },
+    }),
+    y: slider({
+      label: '縦位置', min: 0, max: 1, step: 0.01, value: 0.16, format: (v) => v.toFixed(2),
+      onInput: (v) => { cap().y = v; app.actions.refresh('caption'); },
+    }),
+  };
+  captionSection.add(captionPosition.x.el);
+  captionSection.add(captionPosition.y.el);
+
+  const captionMaxWidthSlider = slider({
+    label: 'はば', min: 0.15, max: 0.8, step: 0.01, value: 0.36, format: (v) => v.toFixed(2),
+    onInput: (v) => { cap().maxWidth = v; app.actions.refresh('caption'); },
+  });
+  captionSection.add(captionMaxWidthSlider.el);
+
+  const alignSegment = segmented({
+    label: 'そろえ',
+    options: [
+      { value: 'left', label: '左' },
+      { value: 'center', label: '中' },
+      { value: 'right', label: '右' },
+    ],
+    value: 'left',
+    onChange: (value) => { cap().align = value; app.actions.refresh('caption'); },
+  });
+  captionSection.add(alignSegment.el);
+
+  const boldToggle = check({
+    label: '太字', value: false,
+    onChange: (value) => { cap().bold = value; app.actions.refresh('caption'); },
+  });
+  const systemFontToggle = check({
+    label: '標準フォントを使う', value: false,
+    onChange: (value) => { cap().font = value ? 'system' : 'rounded'; app.actions.refresh('caption'); },
+  });
+  captionSection.add(controlRow(null, boldToggle.el, { wide: true }));
+  captionSection.add(controlRow(null, systemFontToggle.el, { wide: true }));
+
+  const captionColors = {
+    textColor: colorField({ label: '文字の色', value: '#3f2b52', onChange: (v) => { cap().textColor = v; app.actions.refresh('caption'); } }),
+    bubbleColor: colorField({ label: '吹き出しの色', value: '#ffffff', onChange: (v) => { cap().bubbleColor = v; app.actions.refresh('caption'); } }),
+    borderColor: colorField({ label: '線の色', value: '#55386e', onChange: (v) => { cap().borderColor = v; app.actions.refresh('caption'); } }),
+  };
+  for (const widget of Object.values(captionColors)) captionSection.add(widget.el);
+  captionSection.add(hint('セリフはプレビューと書き出し画像の両方に描きこまれます。位置は画像全体を0〜1とした割合です。'
+    + 'ビューポートで吹き出しをドラッグしても動かせます。'));
+
+  /* -------------------------------------------------------------- 口パク */
+
+  // 口パク lives inside うごき on the pose tab (see below): talking is something
+  // the character *does*, and it is usually recorded together with the motion.
+
+  /* ------------------------------------------------------ movement (pose tab) */
+
+  // This is the pose tab's うごき section; the widgets sit here because they are
+  // driven by the animator alongside the pose state.
+  const moveSection = section(tabPose, 'うごき');
+
+  const animWidgets = {
+    blink: check({ label: 'まばたきする', value: true, onChange: (v) => { state.anim.blink = v; app.animator.reset(); } }),
+    lookAround: check({ label: '目線がうごく', value: false, onChange: (v) => { state.anim.lookAround = v; app.animator.reset(); } }),
+  };
+
+  const motionSegment = segmented({
+    label: 'からだのうごき',
+    options: [
+      { value: 'off', label: 'とまる' },
+      { value: 'idle', label: 'ゆれる' },
+      { value: 'walk', label: '歩く' },
+      { value: 'wave', label: 'てをふる' },
+      { value: 'sleep', label: 'ねている' },
+    ],
+    value: 'off',
+    onChange: (value) => {
+      state.anim.mode = value;
+      // Sleeping always shows the snot bubble, so the motion reads without having
+      // to switch the bubble on as well.
+      if (value === 'sleep') {
+        state.face.eyes.snot.enabled = true;
+        snotToggle.set(true);
+        app.actions.refresh('face');
+      }
+      app.animator.reset();
+      app.needsRender = true;
+    },
+  });
+  moveSection.add(motionSegment.el);
+  for (const widget of Object.values(animWidgets)) moveSection.add(controlRow(null, widget.el, { wide: true }));
+
+  moveSection.add(slider({
+    label: 'まばたきの間隔', min: 1, max: 8, step: 0.1, value: 3.4, format: (v) => `${v.toFixed(1)}秒`,
+    onInput: (v) => { state.anim.blinkInterval = v; },
+  }));
+  moveSection.add(slider({
+    label: '動きの速さ', min: 0.2, max: 2, step: 0.05, value: 1, format: (v) => `${v.toFixed(2)}倍`,
+    onInput: (v) => { state.anim.speed = v; },
+  }));
+
+  const recordButton = buttons({
+    items: [{ id: 'record', label: '録画を開始', primary: true, onClick: () => app.actions.toggleRecording() }],
+  });
+  moveSection.add(recordButton.el);
+  moveSection.add(hint('スペースキーで演出の開始・停止。録画はWebM（動画）として保存されます。'));
+
+  // 口パク: the mouth moves as if talking, and no sound is made at all. It lives
+  // in うごき because talking is motion - and it is usually recorded with it.
+  // (The studio used to read the line with the device's own speech voices, but
+  // those belong to the device, so a recording of them is not ours to hand out.)
+  const flapSection = details(moveSection.body, '口パク（声は出ません）');
+  const flapText = textArea({
+    label: '口パクするセリフ',
+    value: '',
+    rows: 3,
+    onChange: (value) => { state.mouthFlap.text = value; },
+  });
+  flapSection.add(flapText.el);
+  flapSection.add(buttons({
+    items: [{ id: 'flap', label: '口パク／止める', primary: true, onClick: () => app.actions.toggleMouthFlap() }],
+  }));
+  const flapSliders = {
+    rate: slider({
+      label: 'はやさ', min: 0.5, max: 2, step: 0.05, value: 1, format: (v) => `${v.toFixed(2)}倍`,
+      onInput: (v) => { state.mouthFlap.rate = v; },
+    }),
+    mouthGain: slider({
+      label: '口の開き', min: 0.2, max: 2, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.mouthFlap.mouthGain = v; },
+    }),
+  };
+  for (const widget of Object.values(flapSliders)) flapSection.add(widget.el);
+  flapSection.add(hint('音は出ません。セリフの長さぶん口が動いて、自動で止まります。'
+    + '「シーン」タブの「セリフ（フキダシ）」の文とは別で、こちらは長さにだけ使います。'));
+
+  // --- 見る先 (moved here, next to the face controls, from the pose tab) ----
+  const lookAtSection = faceTabSections.look;
+  // `lookAt` moves the eyes and the face only, so the face has to be rebuilt too.
+  const refreshLookAt = () => {
+    app.actions.refresh('lookAt');
+    app.actions.refresh('face');
+    sync();
+  };
+  const lookAtToggle = check({
+    label: '指定した場所を見る',
+    value: false,
+    onChange: (value) => { state.lookAt.enabled = value; refreshLookAt(); },
+  });
+  lookAtSection.add(controlRow(null, lookAtToggle.el, { wide: true }));
+  const lookAtSliders = {
+    x: slider({
+      label: 'よこ（X）', min: -6, max: 6, step: 0.05, value: 0, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.lookAt.x = v; refreshLookAt(); },
+    }),
+    y: slider({
+      label: 'たかさ（Y）', min: 0, max: 5, step: 0.05, value: 2.6, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.lookAt.y = v; refreshLookAt(); },
+    }),
+    z: slider({
+      label: 'おくゆき（Z）', min: -6, max: 6, step: 0.05, value: 3, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.lookAt.z = v; refreshLookAt(); },
+    }),
+    amount: slider({
+      label: '強さ', min: 0, max: 1, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.lookAt.amount = v; refreshLookAt(); },
+    }),
+  };
+  for (const widget of Object.values(lookAtSliders)) lookAtSection.add(widget.el);
+  const turnBodyToggle = check({
+    label: '体も向ける',
+    value: false,
+    onChange: (value) => { state.lookAt.turnBody = value; refreshLookAt(); },
+  });
+  lookAtSection.add(controlRow(null, turnBodyToggle.el, { wide: true }));
+  lookAtSection.add(hint('ビューポートを**クリック**すると、その場所を見るように目と髪が向きます（ドラッグと区別するため、動かさずに押して離してください）。数値でも同じ値を動かせます。'));
+
+  /* ---------------------------------------------------------------- display */
+
+  // The face tab's bottom line: a quick way out of whatever has been built up.
+  tabFace.append(buttons({
+    items: [
+      { id: 'faceReset', label: '顔をリセット', onClick: () => replace({ face: defaultState().face }, 'face') },
+      { id: 'faceRandom', label: '顔をランダムに', onClick: () => randomFace() },
+    ],
+  }).el);
+
+  const displaySection = section(tabView, 'スタイル');
+
+  const styleSegment = segmented({
+    label: 'スタイル',
+    options: STYLE_DEFS.map((style) => ({ value: style.value, label: style.label })),
+    value: 'real',
+    onChange: (value) => replace({ render: { style: value } }, 'render'),
+  });
+  displaySection.add(styleSegment.el);
+  displaySection.add(hint('線画は輪郭線＋白ぬりです（体に色がつきません）。線だけを他の絵に重ねたいときは、「書き出し」タブで「PNGの背景を透明にする」を入れてください。'));
+
+  const outlineToggle = check({
+    label: '輪郭線を出す', value: true,
+    onChange: (value) => { state.render.outline = value; app.actions.refresh('render'); },
+  });
+  displaySection.add(controlRow(null, outlineToggle.el, { wide: true }));
+  const outlineWidthSlider = slider({
+    label: '線の太さ（体・手足）', min: 0, max: 0.08, step: 0.001, value: 0.022, format: (v) => v.toFixed(3),
+    onInput: (v) => { state.render.outlineWidth = v; app.actions.refresh('render'); },
+  });
+  displaySection.add(outlineWidthSlider.el);
+  const outlinePixelsSlider = slider({
+    label: '線の太さ（葉っぱ・鼻）', min: 1, max: 5, step: 0.1, value: 2,
+    format: (v) => `${v.toFixed(1)} px`,
+    onInput: (v) => { state.render.outlinePixels = v; app.actions.refresh('render'); },
+  });
+  displaySection.add(outlinePixelsSlider.el);
+  displaySection.add(colorField({
+    label: '線の色', value: '#2a1e33',
+    swatches: ['#2a1e33', '#111111', '#55386e', '#0f5c8c', '#8c4a0f'],
+    onChange: (v) => { state.render.outlineColor = v; app.actions.refresh('render'); },
+  }));
+  displaySection.add(colorField({
+    label: '紙の色', value: '#ffffff',
+    swatches: ['#ffffff', '#fdf8ee', '#f4f0fb'],
+    onChange: (v) => { state.render.paper = v; app.actions.refresh('render'); },
+  }));
+  const leafBodyLineCheck = check({
+    label: '葉っぱと体の境目に線を出す', value: true,
+    onChange: (v) => { state.render.leafBodyLine = v; app.actions.refresh('render'); },
+    title: '線画では体も葉っぱも紙なので、切ると葉っぱと体の区別がつかなくなります。'
+      + '「葉が体にめり込んで見える」のが気になるときに切ってください',
+  });
+  displaySection.add(controlRow(null, leafBodyLineCheck.el, { wide: true }));
+  displaySection.add(hint('「葉っぱと体の境目に線を出す」を切ると、葉は体の後ろに回り込むだけになります（すっきりしますが、線画では葉と体が同じ白になって見分けにくくなります）。'));
+  displaySection.add(buttons({
+    items: [{
+      id: 'resetStyle',
+      label: 'プリセットのスタイルに戻す',
+      onClick: () => replace({
+        render: {
+          style: 'real', outline: true, outlineWidth: 0.022, outlinePixels: 2,
+          outlineColor: '#2a1e33', paper: '#ffffff', leafBodyLine: true,
+        },
+      }, 'render'),
+    }],
+  }));
+
+  /* ------------------------------------------------------------- 帽子 */
+
+  const hatSection = section(tabView, '帽子');
+  hatSection.add(hint('ぶるべーの頭に帽子をかぶせます。「なし」を選ぶと外れます。'));
+  const hatSegment = segmented({
+    label: '帽子',
+    options: HAT_LIBRARY.map((hat) => ({ value: hat.id, label: hat.label })),
+    value: 'none',
+    onChange: (value) => {
+      state.face.hat.kind = value;
+      // Picking one of the built-in hats (including なし) also clears any GLB hat
+      // the user imported, so なし really removes the hat.
+      state.face.hat.custom = false;
+      app.actions.refresh('all');
+    },
+  });
+  hatSection.add(hatSegment.el);
+  syncers.push(() => hatSegment.set(state.face.hat?.custom === true ? 'none' : (state.face.hat?.kind ?? 'none')));
+
+  // 帽子モデル（GLB）の取り込み。頭に乗るよう自動で位置と大きさを合わせる。
+  const hatFilePicker = h('input', { type: 'file', accept: '.glb,.gltf,model/gltf-binary,model/gltf+json', style: { display: 'none' } });
+  hatFilePicker.addEventListener('change', async () => {
+    const file = hatFilePicker.files?.[0];
+    hatFilePicker.value = '';
+    if (!file) return;
+    try {
+      await app.actions.loadHatModel(file);
+      toast(`帽子「${file.name}」を読み込みました`);
+    } catch (error) {
+      console.error(error);
+      toast('帽子モデルを読み込めませんでした（GLBをお使いください）');
+    }
+  });
+  hatSection.add(hatFilePicker);
+  hatSection.add(buttons({
+    items: [{ id: 'hatfile', label: '帽子モデルを読み込む（GLB）', onClick: () => hatFilePicker.click() }],
+  }));
+  hatSection.add(hint('GLBの帽子を頭に乗せます。大きさと位置は自動で合わせます。'));
+
+  const hatBox = details(hatSection.body, '位置と傾き');
+  const hatSliders = {
+    height: slider({
+      label: '高さ', min: -1.2, max: 1.2, step: 0.01, value: 0, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.hat.height = v; app.actions.refresh('all'); },
+    }),
+    x: slider({
+      label: 'よこ位置', min: -1.2, max: 1.2, step: 0.01, value: 0, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.hat.x = v; app.actions.refresh('all'); },
+    }),
+    z: slider({
+      label: 'おくゆき', min: -1.2, max: 1.2, step: 0.01, value: 0, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.face.hat.z = v; app.actions.refresh('all'); },
+    }),
+    tiltX: slider({
+      label: '前後の傾き', min: -45, max: 45, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.face.hat.tiltX = v; app.actions.refresh('all'); },
+    }),
+    tiltZ: slider({
+      label: '左右の傾き', min: -45, max: 45, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.face.hat.tiltZ = v; app.actions.refresh('all'); },
+    }),
+  };
+  for (const widget of Object.values(hatSliders)) hatBox.add(widget.el);
+  hatBox.add(hint('「高さ」「よこ位置」「おくゆき」で帽子を動かし、「前後の傾き」「左右の傾き」で斜めにかぶせられます。'));
+  syncers.push(() => {
+    hatSliders.height.set(state.face.hat?.height ?? 0);
+    hatSliders.x.set(state.face.hat?.x ?? 0);
+    hatSliders.z.set(state.face.hat?.z ?? 0);
+    hatSliders.tiltX.set(state.face.hat?.tiltX ?? 0);
+    hatSliders.tiltZ.set(state.face.hat?.tiltZ ?? 0);
+  });
+
+  /* ------------------------------------------------------------- body colour */
+
+  const colourSection = section(tabView, '体の色');
+  const themeSegment = segmented({
+    label: 'テーマ',
+    options: THEMES.map((theme) => ({ value: theme.id, label: theme.label })),
+    value: 'original',
+    onChange: (id) => { app.actions.applyTheme(id); sync(); },
+  });
+  colourSection.add(themeSegment.el);
+  colourSection.add(hint('テーマは出発点です。選んだあとでパーツごとに色を変えられます。'));
+
+  /** Write one part colour, creating `colors` if an old settings file lacked it. */
+  const setBodyColor = (part, value) => {
+    state.render.colors = state.render.colors ?? {};
+    state.render.colors[part] = value;
+    app.actions.refresh('render');
+  };
+  const bodyColors = {
+    body: colorField({ label: '体', value: '#c8b0f0', onChange: (v) => setBodyColor('body', v) }),
+    accent: colorField({ label: '手', value: '#8a4fe0', onChange: (v) => setBodyColor('accent', v) }),
+    nose: colorField({ label: '鼻', value: '#7a4fb0', onChange: (v) => setBodyColor('nose', v) }),
+    leaf: colorField({ label: '葉', value: '#a6dd6a', onChange: (v) => setBodyColor('leaf', v) }),
+    vein: colorField({ label: '葉脈', value: '#7fbf3f', onChange: (v) => setBodyColor('vein', v) }),
+    feet: colorField({ label: '足', value: '#7a4fb0', onChange: (v) => setBodyColor('feet', v) }),
+  };
+  for (const widget of Object.values(bodyColors)) colourSection.add(widget.el);
+
+  const envIntensitySlider = slider({
+    label: '環境の映りこみ', min: 0, max: 2, step: 0.05, value: 1, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.envIntensity = v; app.actions.refresh('render'); },
+  });
+  colourSection.add(envIntensitySlider.el);
+  colourSection.add(buttons({
+    items: [{
+      id: 'resetColors',
+      label: 'プリセットの色に戻す',
+      onClick: () => { app.actions.applyTheme(state.render.theme ?? 'original'); sync(); },
+    }],
+  }));
+
+  /* -------------------------------------------------------------------- look */
+
+  const lookSection = section(tabView, '見た目の調整');
+  const mirrorToggle = check({
+    label: '左右反転',
+    value: false,
+    onChange: (value) => { state.render.mirror = value; app.actions.refresh('render'); sync(); },
+  });
+  lookSection.add(controlRow(null, mirrorToggle.el, { wide: true }));
+  lookSection.add(hint('体だけでなく、目や口の位置までふくめて反転します。文字と並べるときの向きを決めるときに使います。'));
+
+  const shadowCheck = check({
+    label: '影を落とす',
+    value: true,
+    onChange: (value) => { state.render.shadow = value; app.actions.refresh('render'); },
+  });
+  lookSection.add(controlRow(null, shadowCheck.el, { wide: true }));
+  const shadowOpacitySlider = slider({
+    label: '濃さ', min: 0, max: 0.6, step: 0.01, value: 0.22, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.shadowOpacity = v; app.actions.refresh('render'); },
+  });
+  const shadowSoftnessSlider = slider({
+    label: 'ぼかし', min: 0, max: 3, step: 0.05, value: 1.6, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.shadowSoftness = v; app.actions.refresh('render'); },
+  });
+  lookSection.add(shadowOpacitySlider.el);
+  lookSection.add(shadowSoftnessSlider.el);
+  const contactShadowToggle = check({
+    label: '接地影だけ',
+    value: false,
+    onChange: (value) => { state.render.contactShadow = value; app.actions.refresh('render'); },
+  });
+  lookSection.add(controlRow(null, contactShadowToggle.el, { wide: true }));
+  const contactBlobToggle = check({
+    label: '足もとの丸い影',
+    value: false,
+    onChange: (value) => { state.render.contactBlob = value; app.actions.refresh('render'); },
+  });
+  lookSection.add(controlRow(null, contactBlobToggle.el, { wide: true }));
+  lookSection.add(hint('影の向きは「ひかり」の光の向き（パッド）にしたがって変わります。'
+    + '「接地影だけ」は足もとの丸い影だけにします。'
+    + '「足もとの丸い影」は、足もとに薄く敷く丸い影です（はじめは出ていません）。'));
+
+  const environmentSegment = segmented({
+    label: '照明の種類',
+    options: ENVIRONMENTS.map((env) => ({ value: env.value, label: env.label })),
+    value: 'gradient',
+    onChange: (value) => { state.render.environment = value; app.actions.refresh('render'); },
+  });
+  // 照明の種類は「シーン」タブの「画面・光」に置く（環境の映りこみの元を選ぶものなので）。
+  lookSection.add(buttons({
+    items: [{
+      id: 'resetLook',
+      label: 'プリセットに戻す',
+      onClick: () => replace({
+        render: {
+          mirror: false, shadow: true, shadowOpacity: 0.22, shadowSoftness: 1.6,
+          contactShadow: false, contactBlob: false, environment: 'gradient', envIntensity: 1,
+        },
+      }, 'render'),
+    }],
+  }));
+
+  /* -------------------------------------------------------------- background */
+
+  const backdropSection = section(tabScene, '背景');
+  // 素材 is one button for two state values (a photo or an effect line). This
+  // remembers which of the two was picked last, so leaving 素材 and coming back
+  // returns to it instead of always jumping to the photos.
+  let lastMaterial = 'preset';
+  const backgroundModeSegment = segmented({
+    label: '背景',
+    options: [
+      { value: 'solid', label: '単色' },
+      { value: 'transparent', label: '透明' },
+      { value: 'material', label: '素材' },
+      { value: 'image', label: '自分の画像' },
+      { value: 'camera', label: 'カメラ＝AR' },
+    ],
+    value: 'solid',
+    onChange: (value) => {
+      if (value === 'camera') {
+        // The action owns the stream, so let it decide and re-read the state after.
+        Promise.resolve(app.actions.toggleCamera(true)).then(() => sync());
+        return;
+      }
+      if (state.view.background === 'camera') app.actions.toggleCamera(false);
+      state.view.background = value === 'material' ? lastMaterial : value;
+      app.actions.refresh('view');
+      sync();
+    },
+  });
+  backdropSection.add(backgroundModeSegment.el);
+  // 背景の色 only shows in the 単色 mode; it used to live in the スタイル section.
+  const backgroundColour = colorField({
+    label: '背景の色', value: '#ffffff',
+    swatches: ['#ffffff', '#f4f0fb', '#d9f0ff', '#fff0f4', '#1b1230'],
+    onChange: (v) => { state.view.backgroundColor = v; app.actions.refresh('view'); },
+  });
+  backdropSection.add(backgroundColour.el);
+
+  const photoButtons = buttons({
+    label: '写真',
+    items: BACKGROUND_PRESETS.map((preset) => ({
+      id: preset.name,
+      label: preset.label,
+      onClick: () => {
+        state.view.backgroundPreset = preset.name;
+        lastMaterial = 'preset';
+        state.view.background = 'preset';
+        app.actions.refresh('view');
+        sync();
+      },
+    })),
+  });
+
+  const effectButtons = buttons({
+    label: '効果線（まんが）',
+    items: EFFECT_PRESETS.map((effect) => ({
+      id: `effect-${effect.name}`,
+      label: effect.label,
+      onClick: () => {
+        state.view.backgroundEffect = effect.name;
+        lastMaterial = 'effect';
+        state.view.background = 'effect';
+        app.actions.refresh('view');
+        sync();
+      },
+    })),
+  });
+
+  // The two rows are shown only while 素材 is the active mode (see the syncer
+  // below); the border groups them so they read as one choice, not two.
+  const materialGroup = h('div', {
+    class: 'material-group',
+    style: { display: 'none', paddingLeft: '8px', borderLeft: '2px solid #e4dff0' },
+  }, photoButtons.el, effectButtons.el, hint('効果線はアプリが描いています（画像ファイルなし・ネット不要）。集中線＝放射、落ち込み線＝上から下、疾走線＝左右です。'));
+  backdropSection.add(materialGroup);
+
+  const backgroundImagePicker = h('input', { type: 'file', accept: 'image/*', style: { display: 'none' } });
+  backgroundImagePicker.addEventListener('change', async () => {
+    const file = backgroundImagePicker.files?.[0];
+    backgroundImagePicker.value = '';
+    if (!file) return;
+    try {
+      const dataUrl = await app.backdrop.loadImageFile(file);
+      state.view.backgroundImage = dataUrl;
+      state.view.background = 'image';
+      app.actions.refresh('view');
+      sync();
+      toast(`背景の画像「${file.name}」を読み込みました`);
+    } catch (error) {
+      console.error(error);
+      toast('画像を読み込めませんでした（PNG / JPG をお使いください）');
+    }
+  });
+  backdropSection.add(backgroundImagePicker);
+  backdropSection.add(buttons({
+    items: [{ id: 'bgimg', label: '画像を読み込む', onClick: () => { if (confirmImageLicense()) backgroundImagePicker.click(); } }],
+  }));
+
+  const backgroundFitSegment = segmented({
+    label: '合わせ方',
+    options: [
+      { value: 'cover', label: '全体' },
+      { value: 'contain', label: '収める' },
+      { value: 'stretch', label: '伸ばす' },
+      { value: 'tile', label: '並べる' },
+    ],
+    value: 'cover',
+    onChange: (value) => { state.view.backgroundFit = value; app.actions.refresh('view'); },
+  });
+  const backgroundBlurSlider = slider({
+    label: 'ぼかし', min: 0, max: 20, step: 0.5, value: 0, format: (v) => `${v.toFixed(1)}px`,
+    onInput: (v) => { state.view.backgroundBlur = v; app.actions.refresh('view'); },
+  });
+  const backgroundDarkenSlider = slider({
+    label: '暗さ', min: 0, max: 0.8, step: 0.01, value: 0, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.view.backgroundDarken = v; app.actions.refresh('view'); },
+  });
+  const backgroundScaleSlider = slider({
+    label: '大きさ', min: 0.5, max: 2, step: 0.01, value: 1, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.view.backgroundScale = v; app.actions.refresh('view'); },
+  });
+  backdropSection.add(backgroundFitSegment.el);
+  backdropSection.add(backgroundBlurSlider.el);
+  backdropSection.add(backgroundDarkenSlider.el);
+  backdropSection.add(backgroundScaleSlider.el);
+
+  const cameraFacingSegment = segmented({
+    label: 'カメラ',
+    options: [
+      { value: 'user', label: '前' },
+      { value: 'environment', label: '後ろ' },
+    ],
+    value: 'environment',
+    onChange: (value) => {
+      state.view.cameraFacing = value;
+      // Only a live stream has to be restarted on the other lens.
+      if (state.view.background === 'camera') {
+        Promise.resolve(app.actions.toggleCamera(true)).then(() => sync());
+        return;
+      }
+      app.actions.refresh('view');
+    },
+  });
+  const cameraMirrorToggle = check({
+    label: '左右反転',
+    value: false,
+    onChange: (value) => { state.view.cameraMirror = value; app.actions.refresh('view'); },
+  });
+  backdropSection.add(cameraFacingSegment.el);
+  backdropSection.add(controlRow(null, cameraMirrorToggle.el, { wide: true }));
+
+  // A gyro reading is a delta from the pose the device held when the switch was
+  // turned on, so the camera does not jump when it starts listening.
+  let gyroBase = null;
+  let gyroOff = null;
+  const gyroToggle = check({
+    label: '端末を傾けて見る',
+    value: false,
+    onChange: (value) => {
+      state.view.gyro = value;
+      if (!value) {
+        gyroBase = null;
+        if (gyroOff) { gyroOff(); gyroOff = null; }
+        return;
+      }
+      gyroBase = { azimuth: Number(state.view.azimuth) || 0, polar: Number(state.view.polar) || 76 };
+      app.backdrop?.requestGyro?.();
+      gyroOff = gyroOff ?? app.backdrop?.onGyro?.((reading) => {
+        if (!gyroBase) return;
+        const yaw = reading?.yaw ?? 0;
+        const pitch = reading?.pitch ?? 0;
+        state.view.azimuth = Math.max(-180, Math.min(180, gyroBase.azimuth - yaw));
+        state.view.polar = Math.max(1, Math.min(179, gyroBase.polar - pitch));
+        app.actions.refresh('view');
+      }) ?? null;
+    },
+  });
+  backdropSection.add(controlRow(null, gyroToggle.el, { wide: true }));
+  backdropSection.add(hint('カメラ（AR）を使うには、https のサイトか localhost で開いてください。http のLANアドレスでは、どのブラウザでもカメラは使えません。使えるときは、URLバーのアイコンを「許可」にし、端末の設定でもアプリにカメラを許可してください。'));
+  backdropSection.add(buttons({
+    items: [{ id: 'bgshot', label: 'この背景で写真を撮る', primary: true, onClick: () => app.actions.savePNG() }],
+  }));
+
+  /* ------------------------------------------------------------------- props */
+
+  // 小物: the things you put the character *among*. Each stage feature gets its
+  // own top-level section rather than one shared 舞台 drawer, so they are easier
+  // to find and open independently.
+  const propSection = section(tabScene, '小物');
+  propSection.add(buttons({
+    label: '追加',
+    items: PROP_LIBRARY.map((entry) => ({
+      id: entry.id,
+      label: entry.label,
+      onClick: () => { app.actions.addProp(entry.id); sync(); },
+    })),
+  }));
+  propSection.add(hint('小物はキャラクターのまわりに置かれ、背景と同じくそのまま写真に写ります。'
+    + 'ビューポートで小物をドラッグすると移動できます（数値でも動かせます）。'));
+  const propListBox = h('div', { class: 'prop-list' });
+  propSection.add(controlRow(null, propListBox, { wide: true }));
+
+  const propWidgets = [];
+  let propShape = '';
+
+  /**
+   * Rebuild the list only when the *set* of props changes: a rebuild mid-drag
+   * would replace the slider the user is holding. The handlers read the item by
+   * index rather than keeping a reference, so a state swap (undo, load) is safe.
+   */
+  const renderProps = () => {
+    const items = state.props?.items ?? [];
+    const shape = items.map((item) => item.kind).join('|');
+    if (shape === propShape && propWidgets.length === items.length) return;
+    propShape = shape;
+    propWidgets.length = 0;
+    propListBox.replaceChildren();
+    items.forEach((item, index) => {
+      const label = PROP_LIBRARY.find((entry) => entry.id === item.kind)?.label ?? item.kind;
+      const block = h('div', {
+        class: 'prop-item',
+        style: { borderTop: '1px dashed #e4dff0', paddingTop: '8px', display: 'grid', gap: '6px' },
+      }, subhead(items.length > 1 ? `${label} ${index + 1}` : label));
+      const patch = (key) => (value) => {
+        const target = state.props?.items?.[index];
+        if (target) target[key] = value;
+        app.actions.refresh('render');
+        sync();
+      };
+      const sliders = {
+        x: slider({ label: 'よこ（X）', min: -4, max: 4, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: patch('x') }),
+        y: slider({ label: 'たかさ（Y）', min: 0, max: 2, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: patch('y') }),
+        z: slider({ label: 'おくゆき（Z）', min: -4, max: 4, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: patch('z') }),
+        rotX: slider({ label: '前後の傾き', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: patch('rotX') }),
+        rotY: slider({ label: '回転（よこ）', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: patch('rotY') }),
+        rotZ: slider({ label: '左右の傾き', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: patch('rotZ') }),
+        scale: slider({ label: '大きさ', min: 0.4, max: 2, step: 0.01, value: 1, format: (v) => v.toFixed(2), onInput: patch('scale') }),
+      };
+      // The numbers are only a fallback for the drag, so they stay folded away.
+      const numbers = details(block, '数値で調整');
+      for (const widget of Object.values(sliders)) numbers.add(widget.el);
+      // 看板 only: the writing area (face *and* frame) can be enlarged on its
+      // own, so the posts and base stay put. The app rebuilds the props from the
+      // state and carries only the whole-prop scale, so the props syncer
+      // re-applies this to the fresh mesh (see `applyPropFaceScale`).
+      let faceScale = null;
+      let signText = null;
+      if (item.kind === 'sign') {
+        signText = textArea({
+          label: '看板の文字（改行できます）',
+          value: '',
+          onChange: (value) => {
+            const target = state.props?.items?.[index];
+            if (target) target.text = value;
+            // Paint straight onto the live face rather than rebuilding every prop
+            // on each keystroke; a later rebuild re-applies it (see main.js).
+            applyPropText(placedPropGroups(app)[index], value);
+            app.needsRender = true;
+          },
+        });
+        block.insertBefore(signText.el, numbers.el);
+        faceScale = slider({
+          label: '文字部分の大きさ', min: 0.4, max: 2.4, step: 0.01, value: 1,
+          format: (v) => v.toFixed(2), onInput: patch('faceScale'),
+        });
+        block.insertBefore(faceScale.el, numbers.el);
+      }
+      block.append(buttons({
+        items: [{
+          id: 'remove',
+          label: '削除',
+          onClick: () => {
+            state.props = state.props ?? { items: [] };
+            state.props.items = (state.props.items ?? []).filter((_, i) => i !== index);
+            app.actions.refresh('render');
+            renderProps();
+            sync();
+          },
+        }],
+      }).el);
+      propListBox.append(block);
+      propWidgets.push({ index, sliders, faceScale, signText });
+    });
+  };
+  renderProps();
+
+  /* ------------------------------------------------------------- 擬音 */
+
+  // 擬音: manga onomatopoeia as stickers over the picture. The sheets are dense,
+  // so the user picks the crop with a marquee instead of the app slicing them
+  // (see src/gion.js for why). Only the sheet name and the crop rectangle live in
+  // the state - never the bitmap - so a shared link stays small.
+  const gionSection = section(tabScene, '擬音（マンガのオノマトペ）');
+  gionSection.add(hint('擬音（ドドド、バン！など）の画像から、四角く切り出したスタンプを画面に貼れます。'
+    + '「擬音をえらぶ」で画像を開き、ドラッグで四角を描いて「追加」を押してください。'
+    + '貼ったあとはビューポートでドラッグして動かせます。'));
+
+  const gionSheetSelect = selectField({
+    label: 'シート',
+    options: GION_SHEETS.map((sheet) => ({ value: sheet.name, label: sheet.label })),
+    value: GION_SHEETS[0]?.name ?? '',
+    onChange: () => {},
+  });
+  if (GION_SHEETS.length) {
+    gionSection.add(gionSheetSelect.el);
+    gionSection.add(buttons({
+      items: [{
+        id: 'pick',
+        label: '擬音をえらぶ',
+        primary: true,
+        onClick: () => openGionPicker(gionSheetSelect.get()),
+      }],
+    }));
+  } else {
+    // No sheet ships with the studio (see src/gion.js), so there is nothing to
+    // pick yet - the section stays, but only with a note on how to add one.
+    gionSection.add(hint('擬音の画像がまだありません。assets/manga-gion/ に画像を置き、'
+      + 'src/gion.js の GION_SHEETS に登録すると使えます。'));
+  }
+
+  const gionListBox = h('div', { class: 'gion-list' });
+  gionSection.add(controlRow(null, gionListBox, { wide: true }));
+
+  let gionShape = '';
+  const gionWidgets = [];
+
+  /** Select a stamp: the viewport outlines it and the list highlights it. */
+  const selectGion = (id) => {
+    app.gionSelected = id ?? null;
+    app.actions.refresh('gion');
+    sync();
+  };
+
+  /**
+   * A little canvas preview of a stamp's crop, drawn from the sheet once it has
+   * loaded. The sheet itself is only fetched when a stamp first needs it.
+   */
+  const gionPreviews = new Map();
+  function gionPreview(item) {
+    const canvas = h('canvas', { class: 'gion-thumb', width: 84, height: 56 });
+    const draw = (image) => {
+      if (!image?.naturalWidth) return;
+      const ctx = canvas.getContext('2d');
+      ctx.clearRect(0, 0, canvas.width, canvas.height);
+      const scale = Math.min(canvas.width / item.sw, canvas.height / item.sh);
+      const w = item.sw * scale;
+      const h = item.sh * scale;
+      ctx.drawImage(image, item.sx, item.sy, item.sw, item.sh,
+        (canvas.width - w) / 2, (canvas.height - h) / 2, w, h);
+    };
+    const known = gionPreviews.get(item.sheet);
+    if (known) {
+      draw(known);
+    } else {
+      const image = new Image();
+      image.onload = () => draw(image);
+      image.src = gionSheetUrl(item.sheet);
+      gionPreviews.set(item.sheet, image);
+    }
+    return canvas;
+  }
+
+  /** Rebuild the list only when the *set* of stamps changes (see `renderProps`). */
+  const renderGion = () => {
+    const items = state.gion?.items ?? [];
+    const shape = items
+      .map((item) => `${item.id}:${item.sheet}:${item.sx},${item.sy},${item.sw},${item.sh}`)
+      .join('|');
+    if (shape === gionShape && gionWidgets.length === items.length) return;
+    gionShape = shape;
+    gionWidgets.length = 0;
+    gionListBox.replaceChildren();
+    if (!items.some((item) => item.id === app.gionSelected)) app.gionSelected = null;
+    if (items.length === 0) {
+      gionListBox.append(h('p', { class: 'hint', text: 'まだ擬音は貼られていません。' }));
+      return;
+    }
+    items.forEach((item, index) => {
+      const label = GION_SHEETS.find((sheet) => sheet.name === item.sheet)?.label ?? item.sheet;
+      const block = h('div', {
+        class: 'gion-item',
+        style: { borderTop: '1px dashed #e4dff0', paddingTop: '8px', display: 'grid', gap: '6px' },
+      });
+      const preview = gionPreview(item);
+      preview.title = 'クリックで選択';
+      preview.addEventListener('click', () => selectGion(item.id));
+      const head = h('div', { class: 'gion-item-head' }, preview,
+        subhead(`擬音 ${index + 1}（${label}）`));
+      block.append(head);
+
+      const patch = (key) => (value) => {
+        const target = state.gion?.items?.[index];
+        if (target) target[key] = value;
+        app.actions.refresh('gion');
+        sync();
+      };
+      const sliders = {
+        w: slider({
+          label: '大きさ', min: 40, max: 900, step: 1, value: DEFAULT_STAMP_WIDTH,
+          format: (v) => `${Math.round(v)}px`, onInput: patch('w'),
+        }),
+        rot: slider({
+          label: '回転', min: -180, max: 180, step: 1, value: 0,
+          format: (v) => `${Math.round(v)}°`, onInput: patch('rot'),
+        }),
+      };
+      const flip = check({ label: '左右反転', value: false, onChange: patch('flip') });
+      block.append(sliders.w.el, sliders.rot.el, controlRow(null, flip.el, { wide: true }));
+      block.append(buttons({
+        items: [
+          { id: 'select', label: 'この擬音を選ぶ', onClick: () => selectGion(item.id) },
+          {
+            id: 'remove',
+            label: '削除',
+            onClick: () => {
+              state.gion = state.gion ?? { items: [] };
+              state.gion.items = (state.gion.items ?? []).filter((_, i) => i !== index);
+              if (app.gionSelected === item.id) app.gionSelected = null;
+              app.actions.refresh('gion');
+              renderGion();
+              sync();
+            },
+          },
+        ],
+      }).el);
+      gionListBox.append(block);
+      gionWidgets.push({ id: item.id, sliders, flip, block });
+    });
+  };
+  renderGion();
+
+  /**
+   * The picker: a full-screen overlay showing the whole sheet, on which the user
+   * drags a rectangle. "追加" turns that rectangle into a stamp in the middle of
+   * the picture; Esc or キャンセル closes without adding anything.
+   */
+  const openGionPicker = (sheetName) => {
+    const sheet = GION_SHEETS.find((entry) => entry.name === sheetName) ?? GION_SHEETS[0];
+    if (!sheet) { toast('擬音のシートがありません'); return; }
+
+    const image = h('img', { class: 'gion-picker-sheet', alt: sheet.label, src: gionSheetUrl(sheet.name) });
+    const marquee = h('div', { class: 'gion-picker-marquee' });
+    const board = h('div', { class: 'gion-picker-board' }, image, marquee);
+    const addButton = h('button', { type: 'button', class: 'btn primary', text: '追加', disabled: true });
+    const cancelButton = h('button', { type: 'button', class: 'btn', text: 'キャンセル' });
+    const overlay = h('div', { class: 'gion-picker' },
+      h('div', { class: 'gion-picker-bar' },
+        h('div', { class: 'gion-picker-title', text: `「${sheet.label}」から擬音をえらぶ` }),
+        h('div', { class: 'gion-picker-actions' },
+          h('span', { class: 'hint', text: 'ドラッグで四角を描く／Escで閉じる' }),
+          addButton,
+          cancelButton)),
+      board);
+
+    /** Where the sheet is currently displayed, in board pixels. */
+    let sheetRect = null;
+    /** The marquee the user is drawing, or the last one drawn. */
+    let current = null;
+    let start = null;
+
+    const layoutSheet = () => {
+      if (!image.naturalWidth) return;
+      const rect = fitSheet(image, { width: board.clientWidth, height: board.clientHeight }, { padding: 12 });
+      image.style.left = `${rect.x}px`;
+      image.style.top = `${rect.y}px`;
+      image.style.width = `${rect.w}px`;
+      image.style.height = `${rect.h}px`;
+      sheetRect = rect;
+    };
+
+    const updateAdd = () => {
+      addButton.disabled = !(current && current.w >= 6 && current.h >= 6 && sheetRect);
+    };
+
+    const drawMarquee = () => {
+      if (!current) { marquee.style.display = 'none'; return; }
+      marquee.style.display = 'block';
+      marquee.style.left = `${current.x}px`;
+      marquee.style.top = `${current.y}px`;
+      marquee.style.width = `${current.w}px`;
+      marquee.style.height = `${current.h}px`;
+    };
+
+    const pointIn = (event, bounds) => ({
+      x: clamp(event.clientX - bounds.left, 0, bounds.width),
+      y: clamp(event.clientY - bounds.top, 0, bounds.height),
+    });
+
+    board.addEventListener('pointerdown', (event) => {
+      if (event.pointerType === 'mouse' && event.button !== 0) return;
+      start = pointIn(event, board.getBoundingClientRect());
+      current = null;
+      drawMarquee();
+      updateAdd();
+      try { board.setPointerCapture(event.pointerId); } catch { /* a nicety, not a need */ }
+    });
+    board.addEventListener('pointermove', (event) => {
+      if (!start) return;
+      current = normalizeRect(start, pointIn(event, board.getBoundingClientRect()));
+      drawMarquee();
+      updateAdd();
+    });
+    const endMarquee = (event) => {
+      if (!start) return;
+      start = null;
+      try { if (board.hasPointerCapture(event.pointerId)) board.releasePointerCapture(event.pointerId); } catch { /* done anyway */ }
+      updateAdd();
+    };
+    board.addEventListener('pointerup', endMarquee);
+    board.addEventListener('pointercancel', endMarquee);
+    image.addEventListener('load', () => { layoutSheet(); updateAdd(); });
+
+    addButton.addEventListener('click', () => {
+      if (!current || !sheetRect) return;
+      const crop = cropFromMarquee(current, sheetRect, image);
+      app.actions.addGionStamp({ sheet: sheet.name, ...crop });
+      close();
+    });
+    cancelButton.addEventListener('click', () => close());
+    overlay.addEventListener('pointerdown', (event) => { if (event.target === overlay) close(); });
+
+    const onKey = (event) => {
+      if (event.key !== 'Escape') return;
+      event.preventDefault();
+      close();
+    };
+    const onResize = () => layoutSheet();
+
+    let closed = false;
+    const close = () => {
+      if (closed) return;
+      closed = true;
+      document.removeEventListener('keydown', onKey);
+      window.removeEventListener('resize', onResize);
+      overlay.remove();
+    };
+
+    document.addEventListener('keydown', onKey);
+    window.addEventListener('resize', onResize);
+    document.body.append(overlay);
+    // A cached sheet is already loaded, so the `load` event never fires for it.
+    if (image.complete && image.naturalWidth) { layoutSheet(); updateAdd(); }
+  };
+
+  /* ------------------------------------------------------------- 見えない壁 */
+
+  // 見えない壁: place up to two finite "boards" and bury the character in them, so
+  // only the part in front still shows. A wall's position is kept *relative to the
+  // character*, so moving ぶるべー carries its walls along (see src/clip.js).
+  const wallSection = section(tabScene, '見えない壁');
+  wallSection.add(hint('見えない板（有限の壁）を置くと、その向こう側が隠れます。'
+    + 'ぶるべーを壁に埋め込むと、体の一部だけが見えるようになります。'
+    + '板は2枚まで置けます。板の位置はぶるべーからの相対なので、ぶるべーを動かすと壁も一緒に動きます。'
+    + '板そのものは透明です（下の「板を表示」をオンにしたときだけ見えます）。'));
+
+  const WALL_SLOTS = [
+    { key: 'wall', label: '壁 1' },
+    { key: 'wall2', label: '壁 2' },
+  ];
+
+  const wallGroups = WALL_SLOTS.map(({ key, label }) => {
+    const box = details(wallSection.body, label);
+    const cfg = () => (state.render[key] = state.render[key] ?? defaultState().render[key]);
+    const toggle = check({
+      label: `${label}で一部を隠す`,
+      value: false,
+      onChange: (value) => { cfg().on = value; app.actions.refresh('render'); sync(); },
+    });
+    box.add(controlRow(null, toggle.el, { wide: true }));
+    const sliders = {
+      x: slider({ label: 'よこ（X）', min: -4, max: 4, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: (v) => { cfg().x = v; app.actions.refresh('render'); sync(); } }),
+      y: slider({ label: 'たかさ（Y）', min: -2, max: 4, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: (v) => { cfg().y = v; app.actions.refresh('render'); sync(); } }),
+      z: slider({ label: 'おくゆき（Z）', min: -4, max: 4, step: 0.05, value: 0, format: (v) => v.toFixed(2), onInput: (v) => { cfg().z = v; app.actions.refresh('render'); sync(); } }),
+      yaw: slider({ label: '向き（左右）', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => { cfg().yaw = v; app.actions.refresh('render'); sync(); } }),
+      tilt: slider({ label: '傾き（前後）', min: -90, max: 90, step: 1, value: 0, format: (v) => `${Math.round(v)}°`, onInput: (v) => { cfg().tilt = v; app.actions.refresh('render'); sync(); } }),
+      size: slider({ label: '大きさ', min: 0.2, max: 8, step: 0.1, value: 1, format: (v) => v.toFixed(1), onInput: (v) => { cfg().size = v; app.actions.refresh('render'); sync(); } }),
+    };
+    for (const widget of Object.values(sliders)) box.add(widget.el);
+
+    // The wall writes depth but no colour, so it hides what is behind it without
+    // being visible. The guide is the tinted copy of that same rectangle, shown
+    // only while placing - and it is also the switch that says "I am placing the
+    // wall now", so with it off the wall cannot swallow an orbit drag.
+    const guide = check({
+      label: '板を表示（ビューポートでドラッグして動かせます）',
+      value: false,
+      onChange: (value) => { cfg().guide = value; app.actions.refresh('render'); sync(); },
+    });
+    box.add(controlRow(null, guide.el, { wide: true }));
+    return { key, label, toggle, sliders, guide };
+  });
+
+  wallSection.add(hint('板は「大きさ」の四角い壁そのもので、**その後ろ側が隠れます**'
+    + '（カメラから見て板の後ろになる部分が隠れるので、カメラを回すと見え方も変わります）。'
+    + '「板を表示」を切ると板は完全に透明になり、カメラ操作のじゃまもしません。'
+    + '「板を表示」した板は、ビューポートでドラッグしても動かせます。'));
+  wallSection.add(buttons({
+    items: [{
+      id: 'wallReset',
+      label: '見えない壁をリセット',
+      onClick: () => {
+        state.render.wall = defaultState().render.wall;
+        state.render.wall2 = defaultState().render.wall2;
+        app.actions.refresh('render');
+        sync();
+      },
+    }],
+  }));
+
+  /* ------------------------------------------------------------------ light */
+
+  // 画面・光: the light rig and the camera, which together decide how the picture
+  // is lit and framed.
+  const screenLightSection = section(tabScene, '画面・光');
+  const lightSection = details(screenLightSection.body, 'ひかり');
+  const lightPad = xyPad({
+    value: { x: -0.2, y: 0.45 },
+    onChange: ({ x, y }) => {
+      state.render.lightAzimuth = x * 180;
+      state.render.lightElevation = 5 + Math.max(0, y) * 80;
+      app.actions.refresh('render');
+    },
+  });
+  lightSection.add(controlRow('光の向き', h('div', { class: 'pad-wrap' },
+    lightPad.el,
+    h('p', { class: 'hint', text: 'ドラッグで光源の向きを変えられます。' }))));
+  const lightIntensitySlider = slider({
+    label: '明るさ', min: 0, max: 5, step: 0.05, value: 2.1, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.lightIntensity = v; app.actions.refresh('render'); },
+  });
+  const ambientSlider = slider({
+    label: '環境光', min: 0, max: 3, step: 0.05, value: 0.9, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.ambient = v; app.actions.refresh('render'); },
+  });
+  const exposureSlider = slider({
+    label: '露光', min: 0.4, max: 2, step: 0.02, value: 1, format: (v) => v.toFixed(2),
+    onInput: (v) => { state.render.exposure = v; app.actions.refresh('render'); },
+  });
+  const lightColorField = colorField({
+    label: '光の色', value: '#ffffff',
+    swatches: ['#ffffff', '#fff3d6', '#d6e8ff', '#ffd9c9', '#e6dcff'],
+    onChange: (v) => { state.render.lightColor = v; app.actions.refresh('render'); },
+  });
+  const ambientColorField = colorField({
+    label: '環境光の色', value: '#ffffff',
+    swatches: ['#ffffff', '#d9d0f2', '#cfe6ff', '#ffe6cc', '#e8ffe0'],
+    onChange: (v) => { state.render.ambientColor = v; app.actions.refresh('render'); },
+  });
+  lightSection.add(environmentSegment.el);
+  lightSection.add(lightIntensitySlider.el);
+  lightSection.add(ambientSlider.el);
+  lightSection.add(lightColorField.el);
+  lightSection.add(ambientColorField.el);
+  lightSection.add(exposureSlider.el);
+  lightSection.add(hint('「照明の種類」は環境の映りこみの元（グラデーション／部屋／なし）です。'
+    + '「光の色」でライトの色、「環境光の色」で影側の色を変えられます。'
+    + 'テクスチャ（環境）の映りこみの強さは「見た目」タブの「環境の映りこみ」で調整できます。'));
+
+  /* ----------------------------------------------------------------- camera */
+
+  const cameraSection = details(screenLightSection.body, 'カメラ');
+
+  const projectionSegment = segmented({
+    label: '映し方',
+    options: [
+      { value: 'persp', label: '遠近あり' },
+      { value: 'ortho', label: '正投影' },
+    ],
+    value: 'persp',
+    onChange: (value) => replace({ view: { projection: value } }, 'view'),
+  });
+  cameraSection.add(projectionSegment.el);
+  cameraSection.add(hint('正投影にすると遠近のゆがみが消え、図面のような絵になります。'));
+
+  cameraSection.add(buttons({
+    label: '向き',
+    items: [
+      { id: 'front', label: '正面', onClick: () => app.actions.setCameraPreset('front') },
+      { id: 'threeQuarter', label: '斜め', onClick: () => app.actions.setCameraPreset('threeQuarter') },
+      { id: 'side', label: '横', onClick: () => app.actions.setCameraPreset('side') },
+      { id: 'back', label: '後ろ', onClick: () => app.actions.setCameraPreset('back') },
+      { id: 'top', label: '見下ろし', onClick: () => app.actions.setCameraPreset('top') },
+    ],
+  }));
+
+  const cameraSliders = {
+    azimuth: slider({
+      label: '回転', min: -180, max: 180, step: 1, value: 0, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.view.azimuth = v; app.actions.refresh('view'); },
+    }),
+    polar: slider({
+      label: '高さ', min: 1, max: 179, step: 1, value: 76, format: (v) => `${Math.round(v)}°`,
+      onInput: (v) => { state.view.polar = v; app.actions.refresh('view'); },
+    }),
+    size: slider({
+      label: '大きさ', min: 2, max: 200, step: 0.1, value: 12, format: (v) => v.toFixed(1),
+      onInput: (v) => {
+        if (state.view.projection === 'ortho') state.view.orthoHeight = v;
+        else state.view.distance = v;
+        app.actions.refresh('view');
+      },
+    }),
+    targetY: slider({
+      label: '見る高さ', min: 0, max: Math.max(2, model.size.y * 1.2), step: 0.05, value: model.size.y * 0.5, format: (v) => v.toFixed(2),
+      onInput: (v) => { state.view.targetY = v; app.actions.refresh('view'); },
+    }),
+  };
+  for (const widget of Object.values(cameraSliders)) cameraSection.add(widget.el);
+
+  const autoRotateToggle = check({
+    label: '自動で回す', value: false,
+    onChange: (v) => { state.view.autoRotate = v; app.actions.refresh('view'); },
+  });
+  cameraSection.add(controlRow(null, autoRotateToggle.el, { wide: true }));
+  cameraSection.add(slider({
+    label: '回す速さ', min: 0.2, max: 4, step: 0.1, value: 0.8, format: (v) => v.toFixed(1),
+    onInput: (v) => { state.view.autoRotateSpeed = v; app.actions.refresh('view'); },
+  }));
+
+  /* ------------------------------------------------------------------ export */
+
+  const exportSection = section(tabExport, '画像');
+
+  exportSection.add(segmented({
+    label: 'PNGの大きさ',
+    options: [
+      { value: '1', label: '1倍' },
+      { value: '2', label: '2倍' },
+      { value: '3', label: '3倍' },
+      { value: '4', label: '4倍' },
+    ],
+    value: '2',
+    onChange: (value) => { state.render.pngScale = Number(value); },
+  }));
+  exportSection.add(buttons({
+    items: [
+      { id: 'png', label: 'PNGを保存', primary: true, onClick: () => app.actions.savePNG() },
+      { id: 'copy', label: 'クリップボードにコピー', onClick: () => app.actions.copyPNG() },
+    ],
+  }));
+  const transparentCheck = check({
+    label: 'PNGの背景を透明にする', value: false,
+    onChange: (v) => { state.render.pngTransparent = v; },
+  });
+  exportSection.add(transparentCheck.el);
+  exportSection.add(hint('線画のときに透明にすると、体の白ぬりも透明になって線だけが残ります（他の絵に重ねられます）。ふつう・フラットでは体の色はそのまま残ります。'));
+
+  // まんが（コマ）gets its own section: it is a different kind of output.
+  const comicSection = section(tabExport, 'まんが');
+  const storyScaleSegment = segmented({
+    label: '書き出しの大きさ',
+    options: [
+      { value: '1', label: '1×（軽い）' },
+      { value: '1.5', label: '1.5×' },
+      { value: '2', label: '2×（きれい）' },
+    ],
+    value: '1.5',
+    hint: 'コマ1枚の画素数は「いまの画面の大きさ × この倍率」です。'
+      + '2× だと台紙のPNGがとても大きくなります（重いときは 1× か 1.5×）',
+    onChange: (value) => { state.story.scale = Number(value); },
+  });
+  comicSection.add(storyScaleSegment.el);
+  const storyColumnsSlider = slider({
+    label: '列数', min: 1, max: 4, step: 1, value: 1, format: (v) => `${Math.round(v)}列`,
+    onInput: (v) => { state.story.columns = Math.round(v); },
+  });
+  const storyGapSlider = slider({
+    label: '間隔', min: 0, max: 40, step: 1, value: 12, format: (v) => `${Math.round(v)}px`,
+    onInput: (v) => { state.story.gap = v; },
+  });
+  const storyBackgroundField = colorField({
+    label: '台紙の色', value: '#ffffff',
+    onChange: (v) => { state.story.sheetBackground = v; },
+  });
+  comicSection.add(storyColumnsSlider.el);
+  comicSection.add(storyGapSlider.el);
+  comicSection.add(storyBackgroundField.el);
+  comicSection.add(buttons({
+    items: [
+      { id: 'addPanel', label: '今の状態をコマに追加', onClick: () => { app.actions.addStoryPanel(); sync(); } },
+      { id: 'saveStory', label: 'まんがを書き出す', primary: true, onClick: () => app.actions.saveStory({ scale: state.story?.scale ?? 1.5 }) },
+    ],
+  }));
+  comicSection.add(hint('2列以上で3コマ以上のときは、読む順にコーナーへ番号を付けます。'));
+  const storyPanelBox = h('div', { class: 'story-panels', style: { display: 'grid', gap: '6px' } });
+  comicSection.add(controlRow(null, storyPanelBox, { wide: true }));
+  let storyShape = '';
+
+  /** Bring back everything a panel saved: pose, face, both bubbles and the camera. */
+  const recallStoryPanel = (index) => {
+    const panel = state.story?.panels?.[index];
+    if (!panel) return;
+    // Replace the bones outright: a merged pose would keep bones the panel never had.
+    state.pose = { bones: {}, root: [0, 0, 0] };
+    app.actions.applyState({
+      pose: panel.pose ?? {},
+      face: panel.face ?? {},
+      caption: panel.caption ?? {},
+      caption2: panel.caption2 ?? {},
+      // The 擬音 on the shot. A panel saved before this existed clears them, so
+      // recalling it shows what it actually recorded rather than a leftover.
+      gion: panel.gion ?? { items: [] },
+      // The camera it was recorded with, so the view comes back too. A panel
+      // saved before this existed simply keeps the current camera.
+      ...(panel.view ? { view: panel.view } : {}),
+    }, { scope: 'all', sync: true });
+  };
+
+  const removeStoryPanel = (index) => {
+    state.story = state.story ?? {};
+    state.story.panels = (state.story.panels ?? []).filter((_, i) => i !== index);
+    // The empty patch is only here to route the edit through the app's own apply
+    // path: that is what records an undo step and re-reads the panel.
+    app.actions.applyState({}, { scope: 'caption', sync: true });
+  };
+
+  /**
+   * Same rebuild policy as the prop list: only when the set of panels changes.
+   *
+   * A preview arrives a moment *after* its panel does (it needs a render), so its
+   * version is part of the identity: when one turns up, the row is drawn again
+   * with it.
+   */
+  const renderStoryPanels = () => {
+    const panels = state.story?.panels ?? [];
+    const thumbs = app.actions.storyThumbs?.() ?? null;
+    const shape = `${panels.length}:${panels
+      .map((panel) => `${panel.id ?? ''}:${thumbs?.get?.(panel.id)?.version ?? 0}`)
+      .join('|')}`;
+    if (shape === storyShape) return;
+    storyShape = shape;
+    storyPanelBox.replaceChildren();
+    panels.forEach((panel, index) => {
+      const thumb = thumbs?.get?.(panel.id)?.url;
+      const preview = thumb
+        ? h('img', {
+          class: 'story-thumb',
+          alt: panel.label ?? `コマ${index + 1}`,
+          src: thumb,
+          title: 'クリックでこのコマを呼び出す',
+          style: {
+            width: '100%', height: '76px', objectFit: 'contain', cursor: 'pointer',
+            background: '#f3f0fa', border: '1px solid #e4dff0', borderRadius: '8px',
+          },
+          onClick: () => recallStoryPanel(index),
+        })
+        : h('div', {
+          text: '（プレビューなし）',
+          style: {
+            padding: '6px 8px', borderRadius: '8px', background: '#f7f5fd',
+            color: '#8a80a0', fontSize: '11px',
+          },
+        });
+      const block = h('div', {
+        class: 'story-panel',
+        style: { borderTop: '1px dashed #e4dff0', paddingTop: '6px', display: 'grid', gap: '4px' },
+      }, subhead(panel.label ?? `コマ${index + 1}`), preview);
+      block.append(buttons({
+        items: [
+          { id: 'recall', label: 'このコマを呼び出す', onClick: () => recallStoryPanel(index) },
+          { id: 'remove', label: '削除', onClick: () => removeStoryPanel(index) },
+        ],
+      }).el);
+      storyPanelBox.append(block);
+    });
+  };
+  renderStoryPanels();
+
+  // The share section comes after まんが, so the reading order is 画像 → まんが →
+  // 共有 (the order the outputs are usually wanted in).
+  /* ------------------------------------------------------------ extra export */
+
+  const extraExportSection = section(tabExport, '共有');
+  extraExportSection.add(buttons({
+    items: [
+      { id: 'share-image', label: '画像をシェア', primary: true, onClick: () => app.actions.shareImage() },
+      { id: 'share-x', label: 'Xで投稿', onClick: () => app.actions.shareImage('x') },
+      { id: 'share-fb', label: 'Facebookでシェア', onClick: () => app.actions.shareImage('facebook') },
+      { id: 'share-link', label: 'この見た目のリンクをコピー', onClick: () => app.actions.copyShareLink() },
+    ],
+  }));
+  extraExportSection.add(hint('いまの画面を画像にして「#ぶるべースタジオ」を付けて投稿します。'
+    + 'スマートフォンでは端末の共有画面が開きます。パソコンでは画像をコピーして投稿画面を開くので、貼り付けて投稿してください（Ctrl+V）。'));
+
+  // 手描きの顔パーツを描くための下地。画面を切り取る他の書き出しと違って、これは
+  // 「スタジオが読み込む大きさ・位置そのまま」の素材なので、別のセクションにして
+  // 共有のあとに置く（素材を作る → 見せる、の順）。
+  const faceMapSection = section(tabExport, 'テクスチャの下地を書き出す');
+  faceMapSection.add(buttons({
+    items: [
+      { id: 'facemap-eyes', label: '目の下地を書き出す', onClick: () => app.actions.saveFaceMap('eyes') },
+      { id: 'facemap-mouth', label: '口の下地を書き出す', onClick: () => app.actions.saveFaceMap('mouth') },
+      { id: 'facemap-hair', label: '髪の下地を書き出す', onClick: () => app.actions.saveFaceMap('hair') },
+    ],
+  }));
+  faceMapSection.add(hint('書き出したPNGは、スタジオが読み込む大きさ・位置そのものです。'
+    + 'そのまま絵を描いて（たとえば目にゴルゴ風の眉を描く）「目の画像を読み込む（PNG）」や'
+    + '「口の画像を読み込む（PNG）」で読み込むと、描いた場所にそのまま入ります。'
+    + '青い線は位置合わせの目安です。使う前に消すか、上から塗ってください。'
+    + '「髪の下地」は、頭をぐるりと巻いたテクスチャを開いたもので、横が頭の角度、'
+    + 'たてが高さです。左右の端が頭の後ろ（合わせ目）、青いたて線が顔の正面、'
+    + '青いよこ線が既定の生え際です。'));
+
+  /* --------------------------------------------------------------- settings */
+
+  const settingsSection = section(tabExport, '設定');
+
+  settingsSection.add(buttons({
+    items: [
+      { id: 'save', label: '設定を保存（JSON）', onClick: () => app.actions.saveSettings() },
+      { id: 'load', label: '設定を読み込む', onClick: () => settingsPicker.click() },
+    ],
+  }));
+
+  const settingsPicker = h('input', { type: 'file', accept: '.json,application/json', style: { display: 'none' } });
+  settingsPicker.addEventListener('change', async () => {
+    const file = settingsPicker.files?.[0];
+    settingsPicker.value = '';
+    if (!file) return;
+    try {
+      const text = await file.text();
+      app.actions.loadSettings(text);
+    } catch (error) {
+      console.error(error);
+      toast('設定ファイルを読み込めませんでした');
+    }
+  });
+  settingsSection.add(settingsPicker);
+
+  /* -------------------------------------------------------------------- sync */
+
+  // A tiny read-out of what the renderer is actually doing: if the picture ever
+  // looks wrong or never appears, this says why (buffer size, quality, fps).
+  const infoSection = section(tabScene, '画面の情報');
+  const statsLine = h('p', { class: 'hint', text: '計測中…' });
+  infoSection.add(statsLine);
+  infoSection.add(hint('動きが重い環境では、負荷を下げるために画質（描画バッファの倍率）を自動で下げます。'));
+
+  // シーン: the scene controls are built wherever they belong in the code (the
+  // speech bubble sits with the face controls), so put them on the tab in the
+  // order the user meets them: what is behind the character, what is beside it,
+  // the speech bubble, then the light and the read-out.
+  tabScene.append(
+    backdropSection.el, propSection.el, gionSection.el, wallSection.el,
+    captionSection.el, screenLightSection.el, infoSection.el,
+  );
+
+  boneSyncers.push(() => {
+    const name = rig.selected;
+    for (const [key, button] of boneButtons) button.classList.toggle('active', key === name);
+    const delta = name ? rig.getDelta(name) : { x: 0, y: 0, z: 0 };
+    axisSliders.x.set(delta.x);
+    axisSliders.y.set(delta.y);
+    axisSliders.z.set(delta.z);
+    const root = state.pose.root ?? [0, 0, 0];
+    rootSliders.forEach((widget, index) => widget.set(root[index] ?? 0));
+  });
+
+  syncers.push(...boneSyncers);
+
+  syncers.push(() => {
+    const linked = state.face.eyes.linked !== false;
+    bothControls.group.setVisible(linked);
+    leftControls.group.setVisible(!linked);
+    rightControls.group.setVisible(!linked);
+    bothControls.sync();
+    leftControls.sync();
+    rightControls.sync();
+
+    for (const key of ['left', 'right']) {
+      const eye = state.face.eyes[key];
+      const w = eyeAdvancedWidgets[key];
+      w.eyeX.set(eye.eyeX ?? 0);
+    }
+
+    browToggle.set(state.face.eyes.brow.enabled);
+    browSliders.angle.set(state.face.eyes.brow.angle);
+    browSliders.height.set(state.face.eyes.brow.height);
+    browSliders.length.set(state.face.eyes.brow.length);
+    browSliders.thickness.set(state.face.eyes.brow.thickness);
+    browSliders.spacing.set(state.face.eyes.brow.spacing ?? 0);
+    browSliders.curve.set(state.face.eyes.brow.curve);
+    browSliders.taper.set(state.face.eyes.brow.taper ?? 1);
+    // A loaded ゴル風 picture ignores the shape sliders, so grey those out rather
+    // than leave them looking like they should do something.
+    const browIsImage = state.face.eyes.brow.image === true;
+    for (const key of ['angle', 'thickness', 'curve', 'taper']) {
+      setRowEnabled(browSliders[key], !browIsImage);
+    }
+    browColor.set(state.face.eyes.brow.color);
+    glassesToggle.set(state.face.eyes.glasses.enabled === true);
+    glassesKindSegment.set(state.face.eyes.glasses.kind ?? 'glasses');
+    for (const [key, widget] of Object.entries(glassesSliders)) widget.set(state.face.eyes.glasses[key]);
+    glassesFrameColor.set(state.face.eyes.glasses.frameColor);
+    glassesLensColor.set(state.face.eyes.glasses.lensColor);
+    eyeColors.white.set(state.face.eyes.white);
+    eyeColors.iris.set(state.face.eyes.iris);
+    eyeColors.line.set(state.face.eyes.line);
+  });
+
+  syncers.push(() => {
+    cheeksToggle.set(state.face.eyes.cheeks.enabled === true);
+    for (const [key, widget] of Object.entries(cheekSliders)) widget.set(state.face.eyes.cheeks[key]);
+    cheekColor.set(state.face.eyes.cheeks.color);
+    headMarkShape.set(state.face.eyes.headMark.shape ?? 'off');
+    headMarkSliders.teeth.el.style.display = (state.face.eyes.headMark.shape === 'fringe') ? '' : 'none';
+    headMarkOverEyes.set(state.face.eyes.headMark.overEyes !== false);
+    for (const [key, widget] of Object.entries(headMarkSliders)) widget.set(state.face.eyes.headMark[key]);
+    headMarkColor.set(state.face.eyes.headMark.color);
+    headMarkColor2.set(state.face.eyes.headMark.color2 ?? '#ffffff');
+    snotToggle.set(state.face.eyes.snot.enabled === true);
+    snotSize.set(state.face.eyes.snot.size);
+    for (const [key, widget] of Object.entries(snotSliders)) widget.set(state.face.eyes.snot[key]);
+    snotColor.set(state.face.eyes.snot.color);
+    beardShape.set(state.face.eyes.beard.shape ?? 'off');
+    for (const [key, widget] of Object.entries(beardSliders)) widget.set(state.face.eyes.beard[key]);
+    // 「左右の間隔」は内部値より+10して表示する（既定の -10 が 0 に見える）。
+    beardSliders.spacing.set((state.face.eyes.beard.spacing ?? 0) + 10);
+    beardColor.set(state.face.eyes.beard.color);
+  });
+
+  syncers.push(() => {
+    mouthToggle.set(state.face.mouth.visible);
+    for (const [key, widget] of Object.entries(mouthSliders)) widget.set(state.face.mouth[key]);
+    for (const [key, widget] of Object.entries(mouthColors)) widget.set(state.face.mouth[key]);
+    const mouthShape = mouthModeOf(state.face.mouth);
+    mouthMode.set(mouthShape);
+    const shown = new Set(mouthRowKeys[mouthShape]);
+    for (const key of mouthRowOrder) mouthSliders[key].el.style.display = shown.has(key) ? '' : 'none';
+  });
+
+  syncers.push(() => {
+    motionSegment.set(state.anim.mode ?? 'off');
+    animWidgets.blink.set(state.anim.blink);
+    animWidgets.lookAround.set(state.anim.lookAround);
+  });
+
+  syncers.push(() => {
+    styleSegment.set(state.render.style);
+    outlineToggle.set(state.render.outline);
+    outlinePixelsSlider.set(state.render.outlinePixels ?? 2);
+    leafBodyLineCheck.set(state.render.leafBodyLine !== false);
+    transparentCheck.set(state.render.pngTransparent);
+    lightPad.set({
+      x: state.render.lightAzimuth / 180,
+      y: Math.max(0, (state.render.lightElevation - 5) / 80),
+    });
+    lightIntensitySlider.set(state.render.lightIntensity ?? 2.1);
+    ambientSlider.set(state.render.ambient ?? 0.9);
+    lightColorField.set(state.render.lightColor ?? '#ffffff');
+    ambientColorField.set(state.render.ambientColor ?? '#ffffff');
+    exposureSlider.set(state.render.exposure ?? 1);
+    const line = ['lineart', 'outline'].includes(state.render.style);
+    outlineToggle.el.querySelector('input').disabled = line;
+  });
+
+  syncers.push(() => {
+    projectionSegment.set(state.view.projection);
+    cameraSliders.azimuth.set(state.view.azimuth);
+    cameraSliders.polar.set(state.view.polar);
+    const ortho = state.view.projection === 'ortho';
+    cameraSliders.size.set(ortho ? (state.view.orthoHeight || 7.5) : (state.view.distance || 12));
+    cameraSliders.targetY.set(state.view.targetY || model.size.y * 0.5);
+    autoRotateToggle.set(state.view.autoRotate);
+  });
+
+  syncers.push(() => {
+    lookAtToggle.set(state.lookAt?.enabled === true);
+    for (const [key, widget] of Object.entries(lookAtSliders)) {
+      widget.set(state.lookAt?.[key] ?? LOOK_AT_FALLBACKS[key]);
+    }
+    turnBodyToggle.set(state.lookAt?.turnBody === true);
+  });
+
+  syncers.push(() => {
+    themeSegment.set(state.render?.theme ?? 'original');
+    for (const [key, widget] of Object.entries(bodyColors)) {
+      widget.set(state.render?.colors?.[key] ?? BODY_COLOR_FALLBACKS[key]);
+    }
+    envIntensitySlider.set(state.render?.envIntensity ?? 1);
+  });
+
+  syncers.push(() => {
+    mirrorToggle.set(state.render?.mirror === true);
+    shadowCheck.set(state.render?.shadow !== false);
+    shadowOpacitySlider.set(state.render?.shadowOpacity ?? 0.22);
+    shadowSoftnessSlider.set(state.render?.shadowSoftness ?? 1.6);
+    contactShadowToggle.set(state.render?.contactShadow === true);
+    contactBlobToggle.set(state.render?.contactBlob === true);
+    environmentSegment.set(state.render?.environment ?? 'gradient');
+  });
+
+  syncers.push(() => {
+    const background = state.view?.background ?? 'solid';
+    // 素材 is active for either half of it, and its rows show only then.
+    const isMaterial = background === 'preset' || background === 'effect';
+    backgroundModeSegment.set(isMaterial ? 'material' : background);
+    materialGroup.style.display = isMaterial ? '' : 'none';
+    backgroundColour.set(state.view?.backgroundColor ?? '#ffffff');
+    backgroundFitSegment.set(state.view?.backgroundFit ?? 'cover');
+    backgroundBlurSlider.set(state.view?.backgroundBlur ?? 0);
+    backgroundDarkenSlider.set(state.view?.backgroundDarken ?? 0);
+    backgroundScaleSlider.set(state.view?.backgroundScale ?? 1);
+    cameraFacingSegment.set(state.view?.cameraFacing ?? 'environment');
+    cameraMirrorToggle.set(state.view?.cameraMirror === true);
+    gyroToggle.set(state.view?.gyro === true);
+  });
+
+  syncers.push(() => {
+    renderProps();
+    const items = state.props?.items ?? [];
+    // A rebuild only carries the whole-prop scale, so re-apply each sign's face
+    // size to the freshly built mesh here (see `placedPropGroups`).
+    const groups = placedPropGroups(app);
+    for (const entry of propWidgets) {
+      const item = items[entry.index] ?? {};
+      entry.sliders.x.set(item.x ?? 0);
+      entry.sliders.y.set(item.y ?? 0);
+      entry.sliders.z.set(item.z ?? 0);
+      entry.sliders.rotX.set(item.rotX ?? 0);
+      entry.sliders.rotY.set(item.rotY ?? 0);
+      entry.sliders.rotZ.set(item.rotZ ?? 0);
+      entry.sliders.scale.set(item.scale ?? 1);
+      entry.faceScale?.set(item.faceScale ?? 1);
+      applyPropFaceScale(groups[entry.index], item.faceScale);
+      entry.signText?.set(item.text ?? '');
+    }
+  });
+
+  syncers.push(() => {
+    renderGion();
+    const items = state.gion?.items ?? [];
+    for (const entry of gionWidgets) {
+      const item = items.find((candidate) => candidate.id === entry.id);
+      if (!item) continue;
+      entry.sliders.w.set(item.w ?? DEFAULT_STAMP_WIDTH);
+      entry.sliders.rot.set(item.rot ?? 0);
+      entry.flip.set(item.flip === true);
+      entry.block.classList.toggle('active', item.id === app.gionSelected);
+    }
+  });
+
+  syncers.push(() => {
+    for (const group of wallGroups) {
+      const wall = state.render?.[group.key] ?? defaultState().render[group.key];
+      group.toggle.set(wall.on === true);
+      for (const [key, widget] of Object.entries(group.sliders)) widget.set(wall[key] ?? (key === 'size' ? 1 : 0));
+      group.guide.set(wall.guide === true);
+    }
+  });
+
+  syncers.push(() => {
+    captionBubbleSegment.set(activeCaption);
+    const bubble = cap() ?? {};
+    captionToggle.set(bubble.enabled === true);
+    captionText.set(bubble.text ?? '');
+    verticalToggle.set(bubble.vertical === true);
+    bubbleSegment.set(bubble.bubble ?? 'round');
+    tailSegment.set(bubble.tail ?? 'left');
+    for (const [key, widget] of Object.entries(captionSliders)) {
+      widget.set(bubble[key] ?? CAPTION_SLIDER_FALLBACKS[key]);
+    }
+    captionPosition.x.set(bubble.x ?? 0.58);
+    captionPosition.y.set(bubble.y ?? 0.16);
+    captionMaxWidthSlider.set(bubble.maxWidth ?? 0.36);
+    alignSegment.set(bubble.align ?? 'left');
+    boldToggle.set(bubble.bold === true);
+    systemFontToggle.set(bubble.font === 'system');
+    for (const [key, widget] of Object.entries(captionColors)) {
+      widget.set(bubble[key] ?? CAPTION_COLOR_FALLBACKS[key]);
+    }
+  });
+
+  syncers.push(() => {
+    flapText.set(state.mouthFlap?.text ?? '');
+    for (const [key, widget] of Object.entries(flapSliders)) {
+      widget.set(state.mouthFlap?.[key] ?? MOUTH_FLAP_FALLBACKS[key]);
+    }
+  });
+
+  syncers.push(() => {
+    storyScaleSegment.set(String(state.story?.scale ?? 1.5));
+    storyColumnsSlider.set(state.story?.columns ?? 1);
+    storyGapSlider.set(state.story?.gap ?? 12);
+    storyBackgroundField.set(state.story?.sheetBackground ?? '#ffffff');
+    renderStoryPanels();
+  });
+
+  app.actions.applyFacePreset = applyFacePreset;
+  app.actions.applyPosePreset = applyPosePreset;
+
+  sync();
+
+  // The 'g' key toggles the gizmo behind the panel's back, so the checkbox
+  // follows the rig rather than the other way round.
+  syncers.push(() => gizmoToggle.set(rig.helper.visible === true));
+
+  return {
+    sync,
+    onRigChanged: syncBones,
+    /** Which bubble the caption controls are editing (a drag on it calls this). */
+    selectCaption(key) {
+      if (key !== 'caption' && key !== 'caption2' && key !== 'narration') return;
+      activeCaption = key;
+      sync();
+    },
+    /** Which 擬音 stamp the viewport should outline (a drag on it calls this). */
+    selectGion(id) {
+      app.gionSelected = id ?? null;
+      sync();
+    },
+    /** Open the crop picker for a sheet (the 擬音 section's button calls this). */
+    openGionPicker(sheet) {
+      openGionPicker(sheet ?? gionSheetSelect.get());
+    },
+    setStats(text) { statsLine.textContent = text; },
+    setRecording(recording) {
+      recordButton.setLabel('record', recording ? '録画を停止' : '録画を開始');
+    },
+  };
+}