Fix same-window folder drop target detection

server/public/app.js

@@ -2283,16 +2283,17 @@ async function finishItemPointerDrag(event, move, up) {
   if (!drag) return;
 
   markDraggingRows(drag.paths, false);
-  state.pointerDrag = null;
 
   if (!drag.active) {
+    state.pointerDrag = null;
     return;
   }
 
   event.preventDefault();
   state.suppressClickPath = drag.path;
   state.suppressItemActivationUntil = Date.now() + 450;
-  const target = findPointerDropTarget(event);
+  const target = findPointerDropTarget(event, drag);
+  state.pointerDrag = null;
   recordDebug('pointer.finish', {
     source: drag.path,
     sources: drag.paths,
@@ -2378,7 +2379,7 @@ function clearPointerDropTarget() {
   }
 }
 
-function findPointerDropTarget(event) {
+function findPointerDropTarget(event, drag = state.pointerDrag) {
   let element;
   let elements = [];
   try {
@@ -2404,16 +2405,22 @@ function findPointerDropTarget(event) {
   const win = state.windows.find((item) => item.id === windowEl.dataset.windowId);
   if (!win || win.kind !== 'explorer') return null;
 
-  const drag = state.pointerDrag;
   let row = null;
+  let overEntry = false;
   for (const candidate of elements) {
     try {
       const treeTarget = candidate.closest?.('.tree-label[data-tree-open]');
+      if (treeTarget && treeTarget.closest?.('.window') === windowEl) {
+        overEntry = true;
+      }
       if (treeTarget && treeTarget.closest?.('.window') === windowEl && isValidPointerTargetPath(treeTarget.dataset.treeOpen, drag)) {
         row = treeTarget;
         break;
       }
       const candidateRow = candidate.closest?.('.file-row');
+      if (candidateRow && candidateRow.closest?.('.window') === windowEl) {
+        overEntry = true;
+      }
       if (!candidateRow || candidateRow.dataset.type !== 'directory') {
         continue;
       }
@@ -2435,6 +2442,9 @@ function findPointerDropTarget(event) {
   if (row) {
     return { windowId: win.id, path: row.dataset.path || row.dataset.treeOpen, row };
   }
+  if (overEntry) {
+    return null;
+  }
 
   return { windowId: win.id, path: win.data.path, row: null };
 }