fix: improve errors_only filter and add view page test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Filament/Resources/ApiLogResource.php

@@ -79,6 +79,7 @@ class ApiLogResource extends Resource
                     ->label('Errors only')
                     ->query(fn (Builder $query) => $query->where(
                         fn (Builder $q) => $q->where('status_code', '>=', 400)
+                            ->orWhereNull('status_code')
                             ->orWhereNotNull('error')
                     )),
                 Filter::make('created_at')
@@ -94,8 +95,7 @@ class ApiLogResource extends Resource
             ])
             ->recordActions([
                 ViewAction::make(),
-            ])
-            ->toolbarActions([]);
+            ]);
     }
 
     public static function infolist(Schema $schema): Schema