feat: Enhance error handling in note loading and moving operations with detailed logging

lib/data/app_database.dart

@@ -133,21 +133,41 @@ class AppDatabase extends _$AppDatabase {
     }
 
     return transaction(() async {
-      if (oldIndex < newIndex) {
+      final List<DbNote> all = await (select(notes)
+            ..where((n) => n.isDeleted.equals(false)))
+          .get();
+
+      final int count = all.length;
+      if (count == 0) {
+        return;
+      }
+
+      final int maxIndex = count - 1;
+
+      final int safeOld = oldIndex.clamp(0, maxIndex);
+      final int safeNew = newIndex.clamp(0, maxIndex);
+
+      if (safeOld == safeNew) {
+        return;
+      }
+
+      if (safeOld < safeNew) {
         await customStatement(
           'UPDATE notes SET sort_index = sort_index - 1 WHERE sort_index > ? AND sort_index <= ? AND is_deleted = 0',
-          [oldIndex, newIndex],
+          [safeOld, safeNew],
         );
       } else {
         await customStatement(
           'UPDATE notes SET sort_index = sort_index + 1 WHERE sort_index >= ? AND sort_index < ? AND is_deleted = 0',
-          [newIndex, oldIndex],
+          [safeNew, safeOld],
         );
       }
 
-      await customStatement(
-        'UPDATE notes SET sort_index = ?, updated_at = ? WHERE id = ?',
-        [newIndex, DateTime.now().toIso8601String(), id],
+      await (update(notes)..where((n) => n.id.equals(id))).write(
+        NotesCompanion(
+          sortIndex: Value<int>(safeNew),
+          updatedAt: Value<DateTime>(DateTime.now()),
+        ),
       );
     });
   }

lib/screens/home_screen.dart

@@ -102,7 +102,9 @@ class _HomeScreenState extends State<HomeScreen> {
         _notes = storedNotes;
         _isLoading = false;
       });
-    } catch (e) {
+    } catch (e, st) {
+      // Log the error so we can inspect the root cause before resetting the vault.
+      debugPrint('Failed to load notes: $e\n$st');
       // If loading notes fails (e.g., DB corrupt), notify the app to reset the vault.
       if (widget.onVaultInvalid != null) {
         await widget.onVaultInvalid!();
@@ -145,8 +147,17 @@ class _HomeScreenState extends State<HomeScreen> {
 
     final Note movedNote = _notes[oldIndex];
 
-    await widget.repository.moveNote(movedNote, newIndex);
-    await _loadNotes();
+    try {
+      await widget.repository.moveNote(movedNote, newIndex);
+      await _loadNotes();
+    } catch (e, st) {
+      // Don't let DB errors cause the app to reset the vault automatically.
+      debugPrint('Failed to move note: $e\n$st');
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Error al reordenar la nota: $e')),
+      );
+    }
   }
 
   Future<void> _openNoteEditor(Note note) async {