feat(pda): connect online picking workflow

utils/idempotency.js

@@ -0,0 +1,19 @@
+function hash32(value, seed) {
+	let hash = seed >>> 0
+	for (let index = 0; index < value.length; index += 1) {
+		hash ^= value.charCodeAt(index)
+		hash = Math.imul(hash, 0x01000193) >>> 0
+	}
+	return hash.toString(16).padStart(8, '0')
+}
+
+export function shortStableHash(value) {
+	const input = String(value ?? '')
+	return `${hash32(input, 0x811c9dc5)}${hash32(input, 0x9e3779b9)}`
+}
+
+export function stableOperationId(scope, identity, payload) {
+	const safeScope = String(scope || 'operation').replace(/[^A-Za-z0-9_-]/g, '-').slice(0, 24)
+	const safeIdentity = String(identity || 'unknown').replace(/[^A-Za-z0-9_-]/g, '-').slice(0, 48)
+	return `${safeScope}-${safeIdentity}-${shortStableHash(JSON.stringify(payload ?? null))}`.slice(0, 120)
+}

utils/network.js

@@ -0,0 +1,46 @@
+let online = true
+let listening = false
+const listeners = new Set()
+
+function notify() {
+	for (const listener of listeners) listener(online)
+}
+
+function ensureListening() {
+	if (listening || typeof uni === 'undefined') return
+	listening = true
+	if (typeof uni.onNetworkStatusChange === 'function') {
+		uni.onNetworkStatusChange((result) => {
+			online = Boolean(result.isConnected)
+			notify()
+		})
+	}
+	if (typeof uni.getNetworkType === 'function') {
+		uni.getNetworkType({
+			success: (result) => {
+				online = result.networkType !== 'none'
+				notify()
+			}
+		})
+	}
+}
+
+export function isOnline() {
+	ensureListening()
+	return online
+}
+
+export function requireOnline(message = '当前网络不可用，请联网后刷新重试') {
+	if (!isOnline()) {
+		const error = new Error(message)
+		error.network = true
+		throw error
+	}
+}
+
+export function watchNetwork(listener) {
+	ensureListening()
+	listeners.add(listener)
+	listener(online)
+	return () => listeners.delete(listener)
+}