Refactor document creation error handling to provide more informative error messages

b0esche_cloud/lib/pages/file_explorer.dart

@@ -1,3 +1,4 @@
+import 'package:dio/dio.dart';
 import 'dart:ui';
 import 'dart:js_interop';
 import 'package:flutter/material.dart';
@@ -314,10 +315,13 @@ class _FileExplorerState extends State<FileExplorer> {
       ),
     );
 
+    final fileService = getIt<FileService>();
+    // If orgId is 'personal', treat as empty string for personal workspace
+    // Always treat 'personal' or empty orgId as personal workspace
+    final effectiveOrgId = (widget.orgId == 'personal' || widget.orgId.isEmpty)
+        ? ''
+        : widget.orgId;
     try {
-      final fileService = getIt<FileService>();
-      // If orgId is 'personal', treat as empty string for personal workspace
-      final effectiveOrgId = (widget.orgId == 'personal') ? '' : widget.orgId;
       final fileId = await fileService.createDocument(
         effectiveOrgId,
         currentPath,
@@ -337,6 +341,16 @@ class _FileExplorerState extends State<FileExplorer> {
       }
     } catch (e) {
       snackController.close();
+      String errorMsg = e.toString();
+      // If DioError, try to extract backend error message
+      if (e is DioError) {
+        final data = e.response?.data;
+        if (data is Map && data.containsKey('message')) {
+          errorMsg = data['message'].toString();
+        } else if (data is String) {
+          errorMsg = data;
+        }
+      }
       if (context.mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
@@ -346,7 +360,7 @@ class _FileExplorerState extends State<FileExplorer> {
                 const SizedBox(width: 12),
                 Expanded(
                   child: Text(
-                    'Failed to create document: $e',
+                    'Failed to create document: $errorMsg',
                     overflow: TextOverflow.ellipsis,
                     style: const TextStyle(color: AppTheme.primaryText),
                   ),