diff --git a/src/api/fulfillment.js b/src/api/fulfillment.js
index 85c1f89..a1c74a5 100644
--- a/src/api/fulfillment.js
+++ b/src/api/fulfillment.js
@@ -112,6 +112,15 @@ export function pickOutboundTask(taskNo, request) {
 	return overseasRequest('POST', `${OUTBOUND_BASE}/${encoded(taskNo)}/pick`, request)
 }
 
+export function outboundPickPayload(item, position, packages) {
+	return {
+		outboundPalletItemId: item.outboundPalletItemId,
+		inventoryPositionId: position.inventoryPositionId,
+		packages: Number(packages),
+		cartonMarks: position.cartonMark ? [position.cartonMark] : []
+	}
+}
+
 export function completeOutboundTask(taskNo, request) {
 	return overseasRequest('POST', `${OUTBOUND_BASE}/${encoded(taskNo)}/complete`, request)
 }
diff --git a/src/pages/outbound/outbound.vue b/src/pages/outbound/outbound.vue
index 03b0b3c..9032f8d 100644
--- a/src/pages/outbound/outbound.vue
+++ b/src/pages/outbound/outbound.vue
@@ -25,7 +25,7 @@
 					<view class="fulfillment-card summary-card"><view class="task-head"><text class="business-code">{{ current.taskNo || '—' }}</text><text class="status-badge">{{ statusLabel(current.status) }}</text></view><text class="task-meta">出库单 {{ current.outboundNo || '—' }} · {{ taskType(current) }}</text><view class="metrics"><view><text class="metric-value">{{ plannedPackages }}</text><text>计划箱数</text></view><view><text class="metric-value success">{{ pickedPackages }}</text><text>已拣箱数</text></view><view><text class="metric-value warning">{{ remainingPackages }}</text><text>待拣箱数</text></view></view><button class="link-button" :disabled="busy" @tap="closeTask">返回任务列表</button></view>
 
 					<view v-if="current.items.length" class="item-list">
-						<view v-for="item in current.items" :key="item.palletNo || item.outboundPalletItemId" class="fulfillment-card item-card">
+						<view v-for="item in current.items" :key="item.outboundPalletItemId" class="fulfillment-card item-card">
 							<view class="task-head"><text class="business-code">{{ item.palletNo || '散件出库' }}</text><text>{{ item.pickedPackages }}/{{ item.plannedPackages }} 箱</text></view>
 							<view v-for="position in item.positions" :key="businessLineKey(position)" class="outbound-line" :class="{ selected: selectedPosition === position }" @tap="selectPosition(item, position)">
 								<text class="line-code">{{ lineBusinessCode(position) }}</text><text class="line-meta">{{ position.inboundCode || '无入仓码' }} · 已拣 {{ position.pickedPackages }} 箱 · 可拣 {{ position.availablePackages }} 箱</text>
@@ -49,7 +49,7 @@
 <script>
 	import PortalHeader from '@/components/PortalHeader.vue'
 	import ScanTargetInput from '@/components/ScanTargetInput.vue'
-	import { completeOutboundTask, getOutboundTask, listOutboundTasks, pickOutboundTask, resolveOutboundTask } from '@/api/fulfillment.js'
+	import { completeOutboundTask, getOutboundTask, listOutboundTasks, outboundPickPayload, pickOutboundTask, resolveOutboundTask } from '@/api/fulfillment.js'
 	import { fulfillment, fulfillmentIdempotencyKey, releaseFulfillmentKey, restoreFulfillmentDraft, updateFulfillmentDraft } from '@/stores/fulfillment.js'
 	import { requireSession, session } from '@/stores/session.js'
 	import { playErrorSound, playSuccessSound } from '@/utils/audio-feedback.js'
@@ -105,8 +105,8 @@
 			selectPosition(item, position) { if (!position || position.availablePackages <= 0) return; this.selectedItem = item; this.selectedPosition = position; updateFulfillmentDraft('outbound', { scanCode: this.lineBusinessCode(position), packages: Math.max(1, Math.min(item.plannedPackages - item.pickedPackages, position.availablePackages)) }) },
 			async submitPick() {
 				if (!this.canPick) return
-				const businessCode = this.lineBusinessCode(this.selectedPosition); const payload = { taskNo: this.current.taskNo, businessCode, packages: Number(this.packages) }; const key = fulfillmentIdempotencyKey('outbound', 'pick', payload)
-				await this.run('提交出库拣货', async () => { await pickOutboundTask(this.current.taskNo, { outboundPalletItemId: this.selectedItem.outboundPalletItemId, inventoryPositionId: this.selectedPosition.inventoryPositionId, packages: Number(this.packages), idempotencyKey: key.value }); this.current = await getOutboundTask(this.current.taskNo); releaseFulfillmentKey('outbound', key.signature); this.selectedItem = null; this.selectedPosition = null; updateFulfillmentDraft('outbound', { scanCode: '', packages: 1 }); this.successMessage = '本次出库拣货已记录'; playSuccessSound() })
+				const payload = outboundPickPayload(this.selectedItem, this.selectedPosition, this.packages); const key = fulfillmentIdempotencyKey('outbound', 'pick', { taskNo: this.current.taskNo, ...payload })
+				await this.run('提交出库拣货', async () => { await pickOutboundTask(this.current.taskNo, { ...payload, idempotencyKey: key.value }); this.current = await getOutboundTask(this.current.taskNo); releaseFulfillmentKey('outbound', key.signature); this.selectedItem = null; this.selectedPosition = null; updateFulfillmentDraft('outbound', { scanCode: '', packages: 1 }); this.successMessage = '本次出库拣货已记录'; playSuccessSound() })
 			},
 			async completeTask() {
 				if (!this.canComplete) return
diff --git a/tests/fulfillment-workflows.test.mjs b/tests/fulfillment-workflows.test.mjs
index f811c1c..1afc7dd 100644
--- a/tests/fulfillment-workflows.test.mjs
+++ b/tests/fulfillment-workflows.test.mjs
@@ -6,13 +6,24 @@ import { fulfillment, fulfillmentIdempotencyKey, releaseFulfillmentKey, resetFul
 import {
 	completeDispatchPicking, completeOutboundTask, departDispatch, getDispatchTask, getOutboundTask,
 	listDispatchTasks, listOutboundTasks, normalizeDispatchTask, normalizeOutboundTask,
-	pickDispatchItem, pickOutboundTask, resolveOutboundTask
+	pickDispatchItem, pickOutboundTask, resolveOutboundTask, outboundPickPayload
 } from '../src/api/fulfillment.js'
 import { session } from '../src/stores/session.js'
 import { toDispatchError } from '../src/utils/dispatch-error.js'
 
 const read = (path) => readFile(new URL(path, import.meta.url), 'utf8')
 
+test('outbound partial pick submits the selected carton and distinguishes shared-pallet items', async () => {
+	const first = outboundPickPayload({ outboundPalletItemId: '11' }, { inventoryPositionId: '21', cartonMark: 'BOX-A' }, '1')
+	assert.deepEqual(first, { outboundPalletItemId: '11', inventoryPositionId: '21', packages: 1, cartonMarks: ['BOX-A'] })
+	assert.notDeepEqual(first, outboundPickPayload({ outboundPalletItemId: '12' }, { inventoryPositionId: '22', cartonMark: 'BOX-B' }, 1))
+	assert.deepEqual(outboundPickPayload({ outboundPalletItemId: '13' }, { inventoryPositionId: '23' }, 2).cartonMarks, [])
+	const page = await read('../src/pages/outbound/outbound.vue')
+	assert.match(page, /:key="item.outboundPalletItemId"/)
+	assert.match(page, /outboundPickPayload\(this.selectedItem, this.selectedPosition, this.packages\)/)
+	assert.match(page, /pickOutboundTask\(this.current.taskNo, \{ \.\.\.payload, idempotencyKey: key.value \}\)/)
+})
+
 function storageMock() {
 	const values = new Map()
 	globalThis.uni = {