fix(h5): center score stack, lock profile scroll and gate turn guidance

h5/js/app.js

@@ -304,6 +304,11 @@
 
   var carousel = $('#skin-carousel');
   skinSwipe = SwipeTrack.create(carousel, track, { count: SKINS.length, onSelect: goSkin });
+  // Limit the iOS rubber-band fallback to the fixed profile itself. The mobile
+  // wheel pickers live under body, so their vertical scrolling is untouched.
+  $('#s-profile').addEventListener('touchmove', function (e) {
+    if (e.cancelable) e.preventDefault();
+  }, { passive: false });
   function cancelSkinDrag() { skinSwipe.cancel(); }
   carousel.addEventListener('keydown', function (e) {
     if (e.key === 'ArrowLeft' || e.key === 'ArrowRight') { e.preventDefault(); goSkin(skinIndex + (e.key === 'ArrowRight' ? 1 : -1)); }
@@ -766,7 +771,14 @@
     m.classList.toggle('no-face', cls === 'no-face');
     m.classList.toggle('ok', cls === 'ok');
   }
+  /* camera-hint-stage-pure-begin */
+  function captureStageHint(text, target, hasFrontPhoto) {
+    if ((target === 'front' || !hasFrontPhoto) && (text === '请向左转头' || text === '请向右转头')) return '请正对屏幕';
+    return text;
+  }
+  /* camera-hint-stage-pure-end */
   function setHint(text, ok, silent) {
+    text = captureStageHint(text, CAM_STEPS[camStep].target, !!photos[0]);
     var h = $('#cam-hint');
     if (!text) { h.classList.remove('show', 'ok'); lastHint = ''; voice.dropHint(); return; }
     if (text !== lastHint) {
@@ -949,7 +961,7 @@
     $('#cam-next').classList.remove('show');
     applyMirror();
     resetDetectState();
-    voice.play(VOICE.step[camStep]); // 步骤引导语音
+    if (camStep === 0 || photos[camStep - 1]) voice.play(VOICE.step[camStep]); // 前一步合格照片已保存，才播下一步引导
   }
 
   var camSeq = 0; // 流程令牌:退出拍照/开始拍照时递增,使未决的快门/分析回调失效

h5/js/head-pose.js

@@ -158,8 +158,8 @@
   /**
    * check(points, target, mirrored) -> { ok, hint }
    * target: 'front' | 'left' | 'right'
-   *   'front' : |yaw|<=15 且 |pitch|<=18、|roll|<=15；不 ok 时给方向提示
-   *             （UI 反馈 2026-10：动态提示「请向左转头」「请略微抬头」等，取代此前只提示回正）
+   *   'front' : |yaw|<=15 且 |pitch|<=18、|roll|<=15；角度不合格只提示回正，
+   *             不在正脸拍摄完成前播侧脸转头指令。
    *   'left'  : 画面中看到左脸 = 被摄者头向右转（语义 yaw ∈ [-70°,-30°]），|pitch|<=20
    *   'right' : 画面中看到右脸 = 被摄者头向左转（语义 yaw ∈ [30°,70°]），|pitch|<=20
    * ok=true 时 hint='保持不动'；输入非法（含 estimate 返回 null 的退化特征点）时 ok=false、hint='请正对屏幕'。
@@ -183,12 +183,7 @@
       if (Math.abs(sYaw) <= FRONT_YAW_MAX && Math.abs(pitch) <= FRONT_PITCH_MAX) {
         return { ok: true, hint: HINT_KEEP, yaw: sYaw };
       }
-      // 按超出阈值比例更大的一项引导回正：头偏向自己左侧(yaw>0)→请向右转头；抬头过多(pitch>0)→请略微低头
-      var yawOver = Math.abs(sYaw) / FRONT_YAW_MAX, pitchOver = Math.abs(pitch) / FRONT_PITCH_MAX;
-      if (yawOver >= pitchOver) {
-        return { ok: false, hint: sYaw > 0 ? HINT_TURN_RIGHT : HINT_TURN_LEFT, yaw: sYaw };
-      }
-      return { ok: false, hint: pitch > 0 ? HINT_LOWER : HINT_RAISE, yaw: sYaw };
+      return { ok: false, hint: HINT_FRONT, yaw: sYaw };
     }
 
     if (target === 'left' || target === 'right') {