fix(nc-gui): handle base move edge cases

packages/nc-gui/components/dashboard/TreeView/index.vue

@@ -195,19 +195,20 @@ const onMove = async (_event: { moved: { newIndex: number; oldIndex: number; ele
 
   if (!element?.id) return
 
-  // set default order value as 0 if item not found
-  const previousItem = basesList.value[newIndex - 1]?.order ? { order: basesList.value[newIndex - 1].order } : { order: 0 }
-  const nextItem = basesList.value[newIndex + 1]?.order ? { order: basesList.value[newIndex + 1].order } : { order: 0 }
-
   let nextOrder: number
 
   // set new order value based on the new order of the items
   if (basesList.value.length - 1 === newIndex) {
-    nextOrder = parseFloat(String(previousItem.order)) + 1
+    // If moving to the end, set nextOrder greater than the maximum order in the list
+    nextOrder = Math.max(...basesList.value.map((item) => item?.order ?? 0)) + 1
   } else if (newIndex === 0) {
-    nextOrder = parseFloat(String(nextItem.order)) / 2
+    // If moving to the beginning, set nextOrder smaller than the minimum order in the list
+    nextOrder = Math.min(...basesList.value.map((item) => item?.order ?? 0)) / 2
   } else {
-    nextOrder = (parseFloat(String(previousItem.order)) + parseFloat(String(nextItem.order))) / 2
+    nextOrder =
+      (parseFloat(String(basesList.value[newIndex - 1]?.order ?? 0)) +
+        parseFloat(String(basesList.value[newIndex + 1]?.order ?? 0))) /
+      2
   }
 
   const _nextOrder = !isNaN(Number(nextOrder)) ? nextOrder : oldIndex