feat: Rename encryptedName to name in Categories table and update related logic

lib/screens/home_screen.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:math' as math;
 
 import 'package:flutter/gestures.dart';
@@ -832,20 +833,26 @@ class _CategoryDialogState extends State<_CategoryDialog> {
   Color? _selectedColor;
   IconData? _selectedIcon;
   int _selectedSection = 0;
+  bool _nameHasError = false;
+  bool _isSaving = false;
 
   @override
   void initState() {
     super.initState();
     _controller = TextEditingController(text: widget.category?.name ?? '');
     _selectedColor =
-        widget.category != null && widget.category!.colorValue != null
-        ? Color(widget.category!.colorValue!)
-        : null;
+        widget.category == null
+        ? CategoryStyle.colors.first
+        : widget.category!.colorValue != null
+            ? Color(widget.category!.colorValue!)
+            : null;
     if (widget.category != null && widget.category!.iconCodePoint != null) {
       _selectedIcon = CategoryStyle.icons.firstWhere(
         (IconData icon) => icon.codePoint == widget.category!.iconCodePoint,
         orElse: () => CategoryStyle.icons.first,
       );
+    } else if (widget.category == null) {
+      _selectedIcon = CategoryStyle.icons.first;
     }
   }
 
@@ -856,12 +863,24 @@ class _CategoryDialogState extends State<_CategoryDialog> {
   }
 
   Future<void> _saveCategory() async {
+    if (_isSaving) {
+      return;
+    }
+
     final String name = _controller.text.trim();
     if (name.isEmpty) {
+      setState(() {
+        _nameHasError = true;
+      });
       return;
     }
 
     try {
+      setState(() {
+        _nameHasError = false;
+        _isSaving = true;
+      });
+
       final Category newCategory = Category(
         id: widget.category?.id,
         name: name,
@@ -881,16 +900,19 @@ class _CategoryDialogState extends State<_CategoryDialog> {
       await widget.repository.createCategory(newCategory);
       await widget.onCategoriesChanged();
 
-      try {
-        await widget.onRequestSync();
-      } catch (_) {}
       if (mounted) {
-        await widget.onCategoryDeleted();
-        if (!mounted) return;
         Navigator.pop(context);
       }
+
+      widget.onRequestSync().catchError((_) {});
+  
     } catch (e) {
       debugPrint('ERROR creating category: $e');
+      if (mounted) {
+        setState(() {
+          _isSaving = false;
+        });
+      }
       if (mounted) {
         ScaffoldMessenger.of(
           context,
@@ -899,6 +921,24 @@ class _CategoryDialogState extends State<_CategoryDialog> {
     }
   }
 
+  Future<void> _runPostSaveCallbacks({
+    required Future<void> Function() onCategoriesChanged,
+    required Future<void> Function() onRequestSync,
+    required Future<void> Function() onCategoryDeleted,
+  }) async {
+    try {
+      await onCategoriesChanged();
+    } catch (_) {}
+
+    try {
+      await onCategoryDeleted();
+    } catch (_) {}
+
+    unawaited(
+      onRequestSync().catchError((_) {}),
+    );
+  }
+
   Future<void> _deleteCategory() async {
     final bool? confirm = await showDialog<bool>(
       context: context,
@@ -954,8 +994,17 @@ class _CategoryDialogState extends State<_CategoryDialog> {
           children: [
             TextField(
               controller: _controller,
+              onChanged: (_) {
+                if (_nameHasError) {
+                  setState(() {
+                    _nameHasError = false;
+                  });
+                }
+              },
               decoration: const InputDecoration(
                 hintText: 'Nombre de la categoría',
+              ).copyWith(
+                errorText: _nameHasError ? 'El nombre es obligatorio' : null,
               ),
             ),
             const SizedBox(height: 16),
@@ -1085,8 +1134,14 @@ class _CategoryDialogState extends State<_CategoryDialog> {
           child: const Text('Cancelar'),
         ),
         TextButton(
-          onPressed: _saveCategory,
-          child: Text(widget.category == null ? 'Crear' : 'Guardar'),
+          onPressed: _isSaving ? null : _saveCategory,
+          child: _isSaving
+              ? const SizedBox(
+                  width: 16,
+                  height: 16,
+                  child: CircularProgressIndicator(strokeWidth: 2),
+                )
+              : Text(widget.category == null ? 'Crear' : 'Guardar'),
         ),
       ],
     );