test(theme): cover editor_colors QueryaEditorTheme mapping

Closes #101.

Author: ZhuchkaTriplesix

test/core/theme/parser/querya_editor_theme_from_manifest_test.dart

@@ -0,0 +1,61 @@
+import 'dart:io';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:querya_desktop/core/theme/parser/color_parser.dart';
+import 'package:querya_desktop/core/theme/parser/querya_editor_theme_from_manifest.dart';
+import 'package:querya_desktop/core/theme/parser/querya_theme_manifest.dart';
+import 'package:querya_desktop/core/theme/querya_theme.dart';
+
+void main() {
+  group('editorThemeFromQueryaColors', () {
+    test('full fixture maps custom editor values', () {
+      final raw =
+          File('test/fixtures/themes/querya_custom_dark.json').readAsStringSync();
+      final manifest = QueryaThemeManifest.fromJsonString(raw);
+      final editor = editorThemeFromQueryaColors(
+        colors: manifest.editorColors,
+        fallback: QueryaTheme.darkDefault.editor,
+      );
+
+      expect(editor.background, parseQueryaThemeColor('#0F1117'));
+      expect(editor.foreground, parseQueryaThemeColor('#E2E8F0'));
+      expect(editor.selection, parseQueryaThemeColor('#264F78'));
+      expect(editor.lineNumber, parseQueryaThemeColor('#64748B'));
+      expect(editor.widgetBorder, parseQueryaThemeColor('#38BDF866'));
+      expect(editor.keyword, parseQueryaThemeColor('#569CD6'));
+    });
+
+    test('minimal fixture falls back for missing editor fields', () {
+      final raw = File('test/fixtures/themes/querya_custom_minimal.json')
+          .readAsStringSync();
+      final manifest = QueryaThemeManifest.fromJsonString(raw);
+      final fallback = QueryaTheme.darkDefault.editor;
+      final editor = editorThemeFromQueryaColors(
+        colors: manifest.editorColors,
+        fallback: fallback,
+      );
+
+      expect(editor.background, parseQueryaThemeColor('#010203'));
+      expect(editor.foreground, fallback.foreground);
+      expect(editor.selection, fallback.selection);
+      expect(editor.comment, fallback.comment);
+      expect(editor.widgetBorder, fallback.widgetBorder);
+    });
+
+    test('invalid optional color uses fallback value', () {
+      final fallback = QueryaTheme.darkDefault.editor;
+      final editor = editorThemeFromQueryaColors(
+        colors: const {
+          'background': '#0F1117',
+          'selection': 'bad-color',
+          'keyword': 'ZZZZZZ',
+        },
+        fallback: fallback,
+      );
+
+      expect(editor.background, parseQueryaThemeColor('#0F1117'));
+      expect(editor.selection, fallback.selection);
+      expect(editor.keyword, fallback.keyword);
+    });
+  });
+}