Suppress item activation after drag drop

server/public/app.js

@@ -13,6 +13,7 @@ const state = {
   draggedEntry: null,
   pointerDrag: null,
   suppressClickPath: null,
+  suppressItemActivationUntil: 0,
   debug: [],
   nextDebugId: 1,
   jobs: new Map(),
@@ -276,8 +277,12 @@ function renderExplorer(body, win) {
       lockExplorerScroll(win, body);
       startItemPointerDrag(event, win, entry);
     });
-    row.addEventListener('click', () => selectEntry(win, entry, body));
+    row.addEventListener('click', () => {
+      if (shouldSuppressItemActivation()) return;
+      selectEntry(win, entry, body);
+    });
     row.addEventListener('dblclick', () => {
+      if (shouldSuppressItemActivation()) return;
       if (entry.type === 'directory') {
         loadExplorer(win, entry.path);
       }
@@ -785,6 +790,14 @@ function selectEntry(win, entry, scrollBody = null) {
   restoreExplorerScroll(win, scrollBody);
 }
 
+function shouldSuppressItemActivation() {
+  if (Date.now() <= state.suppressItemActivationUntil) {
+    recordDebug('item.activation.suppressed', { until: state.suppressItemActivationUntil });
+    return true;
+  }
+  return false;
+}
+
 function focusWindow(win) {
   state.focusedId = win.id;
   win.zIndex = ++state.zIndex;
@@ -879,6 +892,7 @@ async function finishItemPointerDrag(event, move, up) {
 
   event.preventDefault();
   state.suppressClickPath = drag.path;
+  state.suppressItemActivationUntil = Date.now() + 450;
   const target = findPointerDropTarget(event);
   recordDebug('pointer.finish', {
     source: drag.path,