feat: chat integration, tenant admin spec, backend chat service, miniprogram updates, DEMO moved to tmp, XCX-TEST removed, migrations & docs

tmp/DEMO-miniprogram/miniprogram/utils/heart.ts

@@ -0,0 +1,21 @@
+/**
+ * 爱心评分映射工具函数
+ * 纯函数，无 wx.* 依赖
+ */
+
+/**
+ * 将 0-10 分数映射为爱心 Emoji
+ * >8.5 → 💖, >7 → 🧡, >5 → 💛, ≤5 → 💙
+ * 超出 [0,10] 范围的值会被 clamp
+ * @param score 评分 0-10
+ * @returns 爱心 Emoji
+ */
+export function getHeartEmoji(score: number): string {
+  // clamp 到 [0, 10]
+  const clamped = Math.min(10, Math.max(0, score))
+
+  if (clamped > 8.5) return '💖'
+  if (clamped > 7) return '🧡'
+  if (clamped > 5) return '💛'
+  return '💙'
+}