Final improvements: explicit undefined handling and safer object fallbacks

Co-authored-by: huangyiirene <7665279+huangyiirene@users.noreply.github.com>

Author: Copilot

packages/plugin-object/src/ObjectForm.tsx

@@ -146,7 +146,7 @@ export const ObjectForm: React.FC<ObjectFormProps> = ({
 
         if (field.type === 'file' || field.type === 'image') {
           formField.multiple = field.multiple;
-          formField.accept = field.accept?.join(',');
+          formField.accept = field.accept ? field.accept.join(',') : undefined;
           // Add validation hints for file size and dimensions
           if (field.max_size) {
             const sizeHint = `Max size: ${formatFileSize(field.max_size)}`;

packages/plugin-object/src/ObjectTable.tsx

@@ -119,7 +119,12 @@ export const ObjectTable: React.FC<ObjectTableProps> = ({
           column.cell = (value: any) => {
             if (!value) return '-';
             if (typeof value === 'object' && value !== null) {
-              return value.name || value.label || value._id || JSON.stringify(value);
+              // Try common display properties first
+              if (value.name) return value.name;
+              if (value.label) return value.label;
+              if (value._id) return value._id;
+              // Fallback to object type indicator
+              return '[Object]';
             }
             return String(value);
           };