feat: 简介模式菜单按类型 A/B 分套，兼容未配置的旧部署

两套网页可通过 runtime-config.js 的 VITE_COMPACT_MENU_TYPE 加载各自左侧菜单；缺省或旧页面不传参数时仍读取原来的类型 A 数据。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/src/core/page-layout/compact-menu-overrides.test.ts

@@ -0,0 +1,35 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { applyCompactMenuOverrides, isDefaultCompactMenuType, normalizeCompactMenuType } from "./compact-menu-overrides";
+import type { MenuItem } from "./sidebar-menu";
+
+const I = (() => null) as unknown as MenuItem["icon"];
+
+test("normalizeCompactMenuType defaults to A", () => {
+  assert.equal(normalizeCompactMenuType(undefined), "A");
+  assert.equal(normalizeCompactMenuType(""), "A");
+  assert.equal(normalizeCompactMenuType("default"), "A");
+  assert.equal(normalizeCompactMenuType("b"), "B");
+  assert.equal(normalizeCompactMenuType("2"), "B");
+  assert.equal(normalizeCompactMenuType("alt"), "B");
+  assert.equal(isDefaultCompactMenuType(undefined), true);
+  assert.equal(isDefaultCompactMenuType(""), true);
+  assert.equal(isDefaultCompactMenuType("B"), false);
+});
+
+test("applyCompactMenuOverrides splits sidebar vs settings", () => {
+  const items: MenuItem[] = [
+    { id: "a", label: "对话", icon: I, path: "/a" },
+    { id: "b", label: "智能体", icon: I, path: "/b" },
+  ];
+  const applied = applyCompactMenuOverrides(items, [
+    { nodeId: "b", placement: "settings", sortOrder: 0, label: "智能体设置" },
+  ]);
+  assert.deepEqual(
+    applied.sidebarItems.map((item) => item.id),
+    ["a"],
+  );
+  assert.equal(applied.settingsItems[0]?.id, "b");
+  assert.equal(applied.settingsItems[0]?.label, "智能体设置");
+});

frontend-web/src/core/page-layout/compact-menu-overrides.ts

@@ -1,7 +1,41 @@
 import type { MenuItem } from "./sidebar-menu";
+import { readRuntimeEnv } from "@/env";
 
 export type CompactMenuPlacement = "sidebar" | "settings";
 
+export const COMPACT_MENU_TYPES = ["A", "B"] as const;
+export type CompactMenuType = (typeof COMPACT_MENU_TYPES)[number];
+export const DEFAULT_COMPACT_MENU_TYPE: CompactMenuType = "A";
+
+const TYPE_ALIASES: Record<string, CompactMenuType> = {
+  A: "A",
+  "1": "A",
+  DEFAULT: "A",
+  B: "B",
+  "2": "B",
+  ALT: "B",
+};
+
+export function normalizeCompactMenuType(value?: string | null): CompactMenuType {
+  const raw = (value ?? "").trim().toUpperCase();
+  return TYPE_ALIASES[raw] ?? DEFAULT_COMPACT_MENU_TYPE;
+}
+
+export function isDefaultCompactMenuType(value?: string | null): boolean {
+  return normalizeCompactMenuType(value) === DEFAULT_COMPACT_MENU_TYPE;
+}
+
+/** Compact-menu variant for this website, from runtime-config.js.
+ * Missing / empty config is type A, which loads the original compact menu. */
+export function getRuntimeCompactMenuType(): CompactMenuType {
+  return normalizeCompactMenuType(readRuntimeEnv("VITE_COMPACT_MENU_TYPE"));
+}
+
+export const COMPACT_MENU_TYPE_LABELS: Record<CompactMenuType, string> = {
+  A: "类型 A",
+  B: "类型 B",
+};
+
 export interface CompactMenuOverride {
   nodeId: string;
   placement: CompactMenuPlacement;