Address code review feedback - improve error handling and string formatting

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

Author: Copilot

packages/plugin-object/src/ObjectForm.tsx

@@ -149,7 +149,10 @@ export const ObjectForm: React.FC<ObjectFormProps> = ({
           formField.accept = field.accept?.join(',');
           // Add validation hints for file size and dimensions
           if (field.max_size) {
-            formField.description = (formField.description || '') + ` (Max size: ${formatFileSize(field.max_size)})`;
+            const sizeHint = `Max size: ${formatFileSize(field.max_size)}`;
+            formField.description = formField.description 
+              ? `${formField.description} (${sizeHint})` 
+              : sizeHint;
           }
         }
 
@@ -347,10 +350,18 @@ function mapFieldTypeToFormType(fieldType: string): string {
 
 /**
  * Formats file size in bytes to human-readable string
- * @param bytes - File size in bytes
+ * @param bytes - File size in bytes (must be non-negative)
  * @returns Formatted string (e.g., "5 MB", "1.5 GB")
  */
 function formatFileSize(bytes: number): string {
+  if (bytes < 0 || !Number.isFinite(bytes)) {
+    return '0 B';
+  }
+  
+  if (bytes === 0) {
+    return '0 B';
+  }
+  
   const units = ['B', 'KB', 'MB', 'GB', 'TB'];
   let size = bytes;
   let unitIndex = 0;

packages/plugin-object/src/ObjectTable.tsx

@@ -108,16 +108,18 @@ export const ObjectTable: React.FC<ObjectTableProps> = ({
           column.cell = (value: any) => {
             if (!value) return '-';
             if (Array.isArray(value)) {
-              return `${value.length} ${field.type}(s)`;
+              const count = value.length;
+              const fileType = field.type === 'image' ? 'image' : 'file';
+              return count === 1 ? `1 ${fileType}` : `${count} ${fileType}s`;
             }
             return value.name || value.original_name || 'File';
           };
         } else if (field.type === 'lookup' || field.type === 'master_detail') {
           // For relationship fields, display the name property if available
           column.cell = (value: any) => {
             if (!value) return '-';
-            if (typeof value === 'object') {
-              return value.name || value.label || value._id || String(value);
+            if (typeof value === 'object' && value !== null) {
+              return value.name || value.label || value._id || JSON.stringify(value);
             }
             return String(value);
           };