✨ feat(sidebar): 支持表元数据显示配置

- 新增侧栏表元数据字段配置并兼容旧版表备注开关
- 设置中心新增侧栏表元数据入口并移除树上重复显示开关
- 批量补齐表大小、创建时间、修改时间等元数据加载与渲染
- 统一表元数据格式化逻辑并修复 V2 左树横向滚动裁切
- 补充设置中心、store、侧栏元数据相关回归测试与多语言文案

frontend/src/utils/sidebarTableMetadata.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  resolveSidebarTableMetadataFields,
+  sanitizeSidebarTableMetadataFields,
+  setSidebarTableMetadataFieldSelected,
+} from './sidebarTableMetadata';
+
+describe('sidebarTableMetadata', () => {
+  it('keeps the default sidebar table metadata to row counts when no value is provided', () => {
+    expect(resolveSidebarTableMetadataFields(undefined, false)).toEqual(['rows']);
+  });
+
+  it('migrates the legacy sidebar table comment toggle into the metadata field list', () => {
+    expect(resolveSidebarTableMetadataFields(undefined, true)).toEqual(['comment', 'rows']);
+  });
+
+  it('preserves an explicit empty metadata selection while filtering unknown fields', () => {
+    expect(sanitizeSidebarTableMetadataFields([], [])).toEqual([]);
+    expect(sanitizeSidebarTableMetadataFields(['updatedAt', 'unknown', 'rows'], [])).toEqual(['rows', 'updatedAt']);
+  });
+
+  it('toggles metadata fields in a canonical display order', () => {
+    expect(setSidebarTableMetadataFieldSelected(['rows'], 'size', true)).toEqual(['rows', 'size']);
+    expect(setSidebarTableMetadataFieldSelected(['comment', 'rows', 'size'], 'comment', false)).toEqual(['rows', 'size']);
+  });
+});

frontend/src/utils/sidebarTableMetadata.ts

@@ -0,0 +1,86 @@
+export const SIDEBAR_TABLE_METADATA_FIELDS = [
+  'comment',
+  'rows',
+  'size',
+  'createdAt',
+  'updatedAt',
+] as const;
+
+export type SidebarTableMetadataField =
+  typeof SIDEBAR_TABLE_METADATA_FIELDS[number];
+
+export interface SidebarTableMetadataSnapshot {
+  tableComment?: string;
+  rowCount?: number;
+  tableSize?: number;
+  createdAt?: string;
+  updatedAt?: string;
+}
+
+export const DEFAULT_SIDEBAR_TABLE_METADATA_FIELDS: SidebarTableMetadataField[] = [
+  'rows',
+];
+
+const isSidebarTableMetadataField = (
+  value: unknown,
+): value is SidebarTableMetadataField =>
+  typeof value === 'string'
+  && SIDEBAR_TABLE_METADATA_FIELDS.includes(
+    value as SidebarTableMetadataField,
+  );
+
+const orderSidebarTableMetadataFields = (
+  fields: Iterable<SidebarTableMetadataField>,
+): SidebarTableMetadataField[] => {
+  const selected = new Set(fields);
+  return SIDEBAR_TABLE_METADATA_FIELDS.filter((field) => selected.has(field));
+};
+
+export const sanitizeSidebarTableMetadataFields = (
+  value: unknown,
+  fallback: SidebarTableMetadataField[] = DEFAULT_SIDEBAR_TABLE_METADATA_FIELDS,
+): SidebarTableMetadataField[] => {
+  if (!Array.isArray(value)) {
+    return orderSidebarTableMetadataFields(fallback);
+  }
+  const normalized = orderSidebarTableMetadataFields(
+    value.filter(isSidebarTableMetadataField),
+  );
+  if (normalized.length === 0) {
+    return orderSidebarTableMetadataFields(fallback);
+  }
+  return normalized;
+};
+
+export const resolveSidebarTableMetadataFields = (
+  value: unknown,
+  legacyShowSidebarTableComment = false,
+): SidebarTableMetadataField[] => {
+  if (Array.isArray(value)) {
+    return orderSidebarTableMetadataFields(
+      value.filter(isSidebarTableMetadataField),
+    );
+  }
+  const defaults = new Set<SidebarTableMetadataField>(
+    DEFAULT_SIDEBAR_TABLE_METADATA_FIELDS,
+  );
+  if (legacyShowSidebarTableComment) {
+    defaults.add('comment');
+  }
+  return orderSidebarTableMetadataFields(defaults);
+};
+
+export const setSidebarTableMetadataFieldSelected = (
+  fields: SidebarTableMetadataField[],
+  target: SidebarTableMetadataField,
+  selected: boolean,
+): SidebarTableMetadataField[] => {
+  const next = new Set(resolveSidebarTableMetadataFields(fields));
+  if (selected) {
+    next.add(target);
+  } else {
+    next.delete(target);
+  }
+  return orderSidebarTableMetadataFields(next);
+};
+