backend news category with default

app/Filament/Resources/NewsResource.php

@@ -51,8 +51,18 @@ class NewsResource extends Resource
                         ->options(NewsCategory::get()->pluck("name","id"))
                         ->label("文章分類")
                         ->columnSpan(1)
+                        ->default(1)
                         ->native(false)
-                        ->Live(),
+                        ->afterStateHydrated(function ($component, $state) {
+                            // ✅ 如果沒有值，設定為第一項
+                            if (empty($state)) {
+                                $firstCategoryId = NewsCategory::first()?->id;
+                                if ($firstCategoryId) {
+                                    $component->state($firstCategoryId);
+                                }
+                            }
+                        })
+                        ->hidden(),
                     ])->columnSpanFull()->columns(2),
                     Group::make()->schema([
                         DatePicker::make('post_date')