test(theme): cover editor_colors QueryaWorkbenchTheme mapping

Closes #102.

Author: ZhuchkaTriplesix

test/core/theme/parser/querya_workbench_theme_from_manifest_test.dart

@@ -0,0 +1,72 @@
+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_theme_manifest.dart';
+import 'package:querya_desktop/core/theme/parser/querya_workbench_theme_from_manifest.dart';
+import 'package:querya_desktop/core/theme/querya_theme.dart';
+
+void main() {
+  group('workbenchThemeFromQueryaColors', () {
+    test('full fixture maps custom workbench values', () {
+      final raw =
+          File('test/fixtures/themes/querya_custom_dark.json').readAsStringSync();
+      final manifest = QueryaThemeManifest.fromJsonString(raw);
+      final workbench = workbenchThemeFromQueryaColors(
+        colors: manifest.editorColors,
+        fallback: QueryaTheme.darkDefault.workbench,
+      );
+
+      expect(workbench.canvas, parseQueryaThemeColor('#09090B'));
+      expect(workbench.surface, parseQueryaThemeColor('#111827'));
+      expect(workbench.sidebarBackground, parseQueryaThemeColor('#0B0F19'));
+      expect(workbench.editorBackground, parseQueryaThemeColor('#0F1117'));
+      expect(workbench.accent, parseQueryaThemeColor('#38BDF8'));
+      expect(workbench.gitModified, parseQueryaThemeColor('#FBBF24'));
+      expect(workbench.gitUntracked, parseQueryaThemeColor('#34D399'));
+    });
+
+    test('minimal fixture falls back for missing workbench fields', () {
+      final raw = File('test/fixtures/themes/querya_custom_minimal.json')
+          .readAsStringSync();
+      final manifest = QueryaThemeManifest.fromJsonString(raw);
+      final fallback = QueryaTheme.darkDefault.workbench;
+      final workbench = workbenchThemeFromQueryaColors(
+        colors: manifest.editorColors,
+        fallback: fallback,
+      );
+
+      expect(workbench.canvas, fallback.canvas);
+      expect(workbench.surface, fallback.surface);
+      expect(workbench.accent, fallback.accent);
+      expect(workbench.gitModified, fallback.gitModified);
+    });
+
+    test('invalid optional color uses fallback value', () {
+      final fallback = QueryaTheme.darkDefault.workbench;
+      final workbench = workbenchThemeFromQueryaColors(
+        colors: const {
+          'canvas': '#09090B',
+          'accent': 'not-a-color',
+          'gitModified': 'ZZZZZZ',
+        },
+        fallback: fallback,
+      );
+
+      expect(workbench.canvas, parseQueryaThemeColor('#09090B'));
+      expect(workbench.accent, fallback.accent);
+      expect(workbench.gitModified, fallback.gitModified);
+    });
+
+    test('does not map editor background key to workbench canvas', () {
+      final fallback = QueryaTheme.darkDefault.workbench;
+      final workbench = workbenchThemeFromQueryaColors(
+        colors: const {'background': '#010203'},
+        fallback: fallback,
+      );
+
+      expect(workbench.canvas, fallback.canvas);
+      expect(workbench.editorBackground, fallback.editorBackground);
+    });
+  });
+}