honor user move event preference in tactics trainer

modules/puzzle/src/main/JsonView.scala

@@ -61,6 +61,7 @@ final class JsonView(
     "animation" -> Json.obj(
       "duration" -> p.animationFactor * animationDuration.toMillis
     ),
+    "moveEvent" -> p.moveEvent,
     "highlight" -> p.highlight)
 
   private def makeBranch(puzzle: Puzzle): Option[tree.Branch] = {

ui/puzzle/src/ground.js

@@ -13,6 +13,13 @@ module.exports = function(data, config, pref, onMove) {
       dests: config.movable.dests,
       rookCastle: pref.rookCastle
     },
+    draggable: {
+      enabled: pref.moveEvent > 0,
+      showGhost: pref.highlight
+    },
+    selectable: {
+      enabled: pref.moveEvent !== 1
+    },
     events: {
       move: onMove
     },