✨ feat(settings): 拆分 SQL 编辑器与查询结果字号

- 新增 SQL 编辑器独立字号与跟随全局配置
- 将查询编辑器和 DDL 预览接入 SQL 专用排版
- 迁移旧版耦合字号设置并保留原有视觉大小
- 更新六语种文案并补充持久化与组件测试

frontend/src/utils/sqlEditorTypography.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  migrateLegacySqlEditorTypographySettings,
+  resolveSqlEditorFontSize,
+  sanitizeSqlEditorTypographySettings,
+} from './sqlEditorTypography';
+
+describe('SQL editor typography', () => {
+  it('derives a code-sized value while following the global font size', () => {
+    expect(resolveSqlEditorFontSize({
+      globalFontSize: 14,
+      sqlEditorFontSize: 20,
+      sqlEditorFontSizeFollowGlobal: true,
+    })).toBe(13);
+  });
+
+  it('uses and clamps an independent SQL editor font size', () => {
+    expect(resolveSqlEditorFontSize({
+      globalFontSize: 14,
+      sqlEditorFontSize: 99,
+      sqlEditorFontSizeFollowGlobal: false,
+    })).toBe(20);
+    expect(sanitizeSqlEditorTypographySettings({
+      sqlEditorFontSize: 9,
+      sqlEditorFontSizeFollowGlobal: false,
+    })).toEqual({
+      sqlEditorFontSize: 10,
+      sqlEditorFontSizeFollowGlobal: false,
+    });
+  });
+
+  it('preserves the legacy editor size derived from a custom data-table font', () => {
+    expect(migrateLegacySqlEditorTypographySettings({
+      dataTableFontSize: 18,
+      dataTableFontSizeFollowGlobal: false,
+    })).toEqual({
+      sqlEditorFontSize: 17,
+      sqlEditorFontSizeFollowGlobal: false,
+    });
+  });
+});