fix(h5): prioritize horizontal report image gestures

h5/js/app.js

@@ -1521,7 +1521,7 @@
       viewport.style.height = (panels[lower].offsetHeight * (1 - ratio) + panels[upper].offsetHeight * ratio) + 'px';
     }
     var swipe = SwipeTrack.create(viewport, track, { count: panels.length, gestureTarget: card,
-      gestureSelector: '.viz-frame', startThreshold: 12, directionRatio: 1.5, maxOverscroll: 16,
+      gestureSelector: '.viz-frame', startThreshold: 12, directionRatio: 2 / 3, maxOverscroll: 16,
       onStart: function () { viewport.style.height = viewport.getBoundingClientRect().height + 'px'; },
       onCancel: height, onSelect: function (i) { setDetailTab(card, String(i)); } });
     detailSwipes.set(card, { swipe: swipe, height: height });

h5/js/swipe-track.js

@@ -34,8 +34,8 @@ window.SwipeTrack = (function () {
       if (!drag.horizontal) {
         var threshold = options.startThreshold || 8, ratio = options.directionRatio || 1;
         if (Math.max(Math.abs(dx), Math.abs(dy)) <= threshold) return;
-        // Ambiguous diagonal movement belongs to page scrolling. Once locked,
-        // neither direction can steal this gesture before the finger lifts.
+        // Each caller chooses its diagonal bias. Once locked, neither direction
+        // can steal this gesture before the finger lifts.
         if (Math.abs(dy) * ratio >= Math.abs(dx)) { drag.vertical = true; return; }
         drag.horizontal = true;
         if (options.onStart) options.onStart(index);