feat(i18n): add UI-only memory label formatter

tests/ui-label-formatter.mjs

@@ -0,0 +1,88 @@
+import assert from "node:assert/strict";
+
+import { setLocale } from "../i18n/index.js";
+import {
+  uiBuildRegionLine,
+  uiBuildScopeMetaText,
+  uiDescribeStoryTimeSpanDisplay,
+  uiMemoryNodeTypeClass,
+  uiOwnerTypeLabel,
+  uiScopeBadgeText,
+  uiTypeLabel,
+} from "../ui/ui-label-formatter.js";
+
+setLocale("zh-CN");
+assert.equal(uiTypeLabel("event"), "事件");
+assert.equal(uiTypeLabel("pov_memory"), "主观记忆");
+assert.equal(uiTypeLabel("custom_type"), "custom_type");
+assert.equal(uiTypeLabel(""), "—");
+assert.equal(uiMemoryNodeTypeClass("character"), "type-character");
+assert.equal(uiMemoryNodeTypeClass("pov_memory"), "type-character");
+assert.equal(uiMemoryNodeTypeClass("event"), "type-event");
+assert.equal(uiOwnerTypeLabel("user"), "用户");
+assert.equal(uiOwnerTypeLabel("character"), "角色");
+assert.equal(
+  uiScopeBadgeText({ layer: "pov", ownerType: "character", ownerName: "艾琳" }),
+  "角色 POV · 艾琳",
+);
+assert.equal(
+  uiScopeBadgeText({ layer: "objective", regionPrimary: "钟楼" }),
+  "客观 · 钟楼",
+);
+assert.equal(
+  uiBuildRegionLine({
+    regionPrimary: "钟楼",
+    regionPath: ["王城", "钟楼"],
+    regionSecondary: ["地下室"],
+  }),
+  "主地区: 钟楼 | 地区路径: 王城 / 钟楼 | 次级地区: 地下室",
+);
+assert.equal(uiDescribeStoryTimeSpanDisplay({ mixed: true }), "混合时间");
+assert.equal(
+  uiDescribeStoryTimeSpanDisplay({ startLabel: "第一章", endLabel: "第二章", mixed: true }),
+  "第一章 → 第二章 · 混合",
+);
+assert.equal(
+  uiBuildScopeMetaText({
+    scope: { layer: "pov", ownerType: "user", ownerName: "玩家" },
+    storyTimeSpan: { startLabel: "第一章", mixed: true },
+  }),
+  "用户 POV: 玩家 · 剧情时间: 第一章 · 混合",
+);
+
+setLocale("en-US");
+assert.equal(uiTypeLabel("event"), "Event");
+assert.equal(uiTypeLabel("pov_memory"), "POV Memory");
+assert.equal(uiOwnerTypeLabel("user"), "User");
+assert.equal(uiOwnerTypeLabel("character"), "Character");
+assert.equal(
+  uiScopeBadgeText({ layer: "pov", ownerType: "character", ownerName: "Eileen" }),
+  "Character POV · Eileen",
+);
+assert.equal(
+  uiScopeBadgeText({ layer: "objective", regionPrimary: "Clocktower" }),
+  "Objective · Clocktower",
+);
+assert.equal(
+  uiBuildRegionLine({
+    regionPrimary: "Clocktower",
+    regionPath: ["Capital", "Clocktower"],
+    regionSecondary: ["Basement"],
+  }),
+  "Primary region: Clocktower | Region path: Capital / Clocktower | Secondary regions: Basement",
+);
+assert.equal(uiDescribeStoryTimeSpanDisplay({ mixed: true }), "Mixed time");
+assert.equal(
+  uiDescribeStoryTimeSpanDisplay({ startLabel: "Chapter 1", endLabel: "Chapter 2", mixed: true }),
+  "Chapter 1 → Chapter 2 · mixed",
+);
+assert.equal(
+  uiBuildScopeMetaText({
+    scope: { layer: "pov", ownerType: "user", ownerName: "Player" },
+    storyTimeSpan: { startLabel: "Chapter 1", mixed: true },
+  }),
+  "User POV: Player · Story time: Chapter 1 · mixed",
+);
+
+setLocale("zh-CN");
+console.log("ui label formatter tests passed");