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utils/searchHistory.js

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+const SEARCH_HISTORY_LIMIT = 5
+
+export function getSearchHistory(storageKey) {
+	if (!storageKey) return []
+	const cached = uni.getStorageSync(storageKey)
+	if (!Array.isArray(cached)) return []
+	return cached
+		.map(item => String(item || '').trim())
+		.filter(Boolean)
+		.slice(0, SEARCH_HISTORY_LIMIT)
+}
+
+export function saveSearchHistory(storageKey, keyword) {
+	const word = String(keyword || '').trim()
+	const current = getSearchHistory(storageKey)
+	if (!storageKey || !word) return current
+	const next = [word]
+		.concat(current.filter(item => item !== word))
+		.slice(0, SEARCH_HISTORY_LIMIT)
+	uni.setStorageSync(storageKey, next)
+	return next
+}