feat(ui): add copy action to error banners

apps/desktop/src/components/grid/DataGrid.vue

@@ -7267,10 +7267,7 @@ const gridContextMenuItems = computed<ContextMenuItem[]>(() => {
     </div>
 
     <!-- Error bar -->
-    <div v-if="saveError" class="px-3 py-1.5 border-t bg-destructive/10 text-destructive text-xs shrink-0 flex items-center gap-2">
-      <span class="flex-1">{{ saveError }}</span>
-      <button class="hover:underline" @click="saveError = ''">{{ t("grid.dismiss") }}</button>
-    </div>
+    <ErrorBanner v-if="saveError" :message="saveError" copy-mode="label" dismissible @dismiss="saveError = ''" />
 
     <!-- Bottom status bar -->
     <div v-if="!isErrorResult" class="grid grid-cols-[minmax(0,1fr)_minmax(0,38%)_minmax(0,1fr)] items-center gap-2 px-3 py-1 border-t text-xs text-muted-foreground bg-muted/30 shrink-0">