fix(VDataTable): strip item value proxies in selected Set

Object values result in different Proxy objects when adding to the set vs checking Set.has()

packages/vuetify/src/labs/VDataTable/composables/select.ts

@@ -2,7 +2,7 @@
 import { useProxiedModel } from '@/composables/proxiedModel'
 
 // Utilities
-import { computed, inject, provide } from 'vue'
+import { computed, inject, provide, toRaw } from 'vue'
 import { deepEqual, propsFactory, wrapInArray } from '@/util'
 
 // Types
@@ -44,7 +44,7 @@ const singleSelectStrategy: DataTableSelectStrategy = {
   showSelectAll: false,
   allSelected: () => [],
   select: ({ items, value }) => {
-    return new Set(value ? [items[0]?.value] : [])
+    return new Set(value ? [toRaw(items[0]?.value)] : [])
   },
   selectAll: ({ selected }) => selected,
 }
@@ -54,8 +54,8 @@ const pageSelectStrategy: DataTableSelectStrategy = {
   allSelected: ({ currentPage }) => currentPage,
   select: ({ items, value, selected }) => {
     for (const item of items) {
-      if (value) selected.add(item.value)
-      else selected.delete(item.value)
+      if (value) selected.add(toRaw(item.value))
+      else selected.delete(toRaw(item.value))
     }
 
     return selected
@@ -68,8 +68,8 @@ const allSelectStrategy: DataTableSelectStrategy = {
   allSelected: ({ allItems }) => allItems,
   select: ({ items, value, selected }) => {
     for (const item of items) {
-      if (value) selected.add(item.value)
-      else selected.delete(item.value)
+      if (value) selected.add(toRaw(item.value))
+      else selected.delete(toRaw(item.value))
     }
 
     return selected
@@ -122,11 +122,11 @@ export function provideSelection (
   })
 
   function isSelected (items: SelectableItem | SelectableItem[]) {
-    return wrapInArray(items).every(item => selected.value.has(item.value))
+    return wrapInArray(items).every(item => selected.value.has(toRaw(item.value)))
   }
 
   function isSomeSelected (items: SelectableItem | SelectableItem[]) {
-    return wrapInArray(items).some(item => selected.value.has(item.value))
+    return wrapInArray(items).some(item => selected.value.has(toRaw(item.value)))
   }
 
   function select (items: SelectableItem[], value: boolean) {