diff --git a/src/main/java/com/ffii/fpsms/modules/common/demo/DemoSandboxSeeder.kt b/src/main/java/com/ffii/fpsms/modules/common/demo/DemoSandboxSeeder.kt
index 03554b19..8802ab80 100644
--- a/src/main/java/com/ffii/fpsms/modules/common/demo/DemoSandboxSeeder.kt
+++ b/src/main/java/com/ffii/fpsms/modules/common/demo/DemoSandboxSeeder.kt
@@ -139,10 +139,13 @@ class DemoSandboxSeeder(
             val existing = userRepository.findByUsernameAndDeletedFalse(DEMO_USERNAME)
             if (existing.isPresent) {
                 assignDemoAuthorities(existing.get().id)
+                backfillDemoPurchaseLinePrices()
+                seedDashboardTrucks()
                 log.info("Demo sandbox already present (user '{}').", DEMO_USERNAME)
                 return@executeWithoutResult
             }
             seed()
+            seedDashboardTrucks()
             log.info("Demo sandbox seeded. Sign in as {} / {}", DEMO_USERNAME, DEMO_PASSWORD)
         }
     }
@@ -171,6 +174,233 @@ class DemoSandboxSeeder(
         throw IllegalStateException("Demo database login can read the live schema. Refusing to start.")
     }
 
+    /**
+     * Truck board reads delivery_order_pick_order for today, tomorrow, and the day after.
+     * If those rows are still on an earlier day, shift them to the current date.
+     * Opening the dashboard does this, so a demo on a later day still has trucks to show.
+     */
+    @Synchronized
+    fun alignDashboardTrucksToToday() {
+        val anchored = jdbcTemplate.query(
+            """
+            SELECT requiredDeliveryDate
+            FROM delivery_order_pick_order
+            WHERE ticketNo = 'DEMO-DASH-0-2F-AM-A' AND deleted = 0
+            LIMIT 1
+            """.trimIndent(),
+        ) { rs, _ -> rs.getDate("requiredDeliveryDate")?.toLocalDate() }.firstOrNull()
+        if (anchored == LocalDate.now()) return
+        seedDashboardTrucks()
+    }
+
+    private fun seedDashboardTrucks() {
+        val loafId = demoItemId("DEMO-FG-01")
+        val bunId = demoItemId("DEMO-FG-02")
+        val pcsId = jdbcTemplate.query(
+            "SELECT id FROM uom_conversion WHERE code = 'PCS' AND deleted = 0 ORDER BY id LIMIT 1",
+        ) { rs, _ -> rs.getLong("id") }.firstOrNull()
+
+        for (truck in dashboardTrucks()) {
+            val inserted = jdbcTemplate.update(
+                """
+                INSERT INTO delivery_order_pick_order (
+                    storeId, requiredDeliveryDate, truckDepartureTime, truckLanceCode,
+                    shopCode, shopName, loadingSequence, ticketNo, ticketStatus,
+                    handlerName, createdBy, modifiedBy, deleted
+                )
+                SELECT ?, DATE_ADD(CURDATE(), INTERVAL ? DAY), ?, ?, ?, ?, ?, ?, ?, '示範倉務', 'demo', 'demo', 0
+                FROM DUAL
+                WHERE NOT EXISTS (
+                    SELECT 1 FROM delivery_order_pick_order WHERE ticketNo = ?
+                )
+                """.trimIndent(),
+                truck.storeId,
+                truck.dayOffset,
+                truck.departure,
+                truck.lane,
+                truck.shopCode,
+                truck.shopName,
+                truck.sequence,
+                truck.ticketNo,
+                truck.status,
+                truck.ticketNo,
+            )
+            jdbcTemplate.update(
+                """
+                UPDATE delivery_order_pick_order
+                SET storeId = ?,
+                    requiredDeliveryDate = DATE_ADD(CURDATE(), INTERVAL ? DAY),
+                    truckDepartureTime = ?,
+                    truckLanceCode = ?,
+                    shopCode = ?,
+                    shopName = ?,
+                    loadingSequence = ?,
+                    ticketStatus = ?,
+                    handlerName = '示範倉務',
+                    ticketReleaseTime = CASE
+                        WHEN ? = 'pending' THEN NULL
+                        ELSE TIMESTAMP(DATE_ADD(CURDATE(), INTERVAL ? DAY), ?)
+                    END,
+                    ticketCompleteDateTime = CASE
+                        WHEN ? = 'completed' THEN TIMESTAMP(DATE_ADD(CURDATE(), INTERVAL ? DAY), ?)
+                        ELSE NULL
+                    END,
+                    deleted = 0
+                WHERE ticketNo = ?
+                """.trimIndent(),
+                truck.storeId,
+                truck.dayOffset,
+                truck.departure,
+                truck.lane,
+                truck.shopCode,
+                truck.shopName,
+                truck.sequence,
+                truck.status,
+                truck.status,
+                truck.dayOffset,
+                truck.releaseTime,
+                truck.status,
+                truck.dayOffset,
+                truck.completeTime,
+                truck.ticketNo,
+            )
+            jdbcTemplate.update(
+                """
+                INSERT INTO truck (
+                    TruckLanceCode, DepartureTime, ShopCode, ShopName, LoadingSequence,
+                    Store_id, districtReference, remark, deleted
+                )
+                SELECT ?, ?, ?, ?, ?, ?, '示範區', '示範車線', 0
+                FROM DUAL
+                WHERE NOT EXISTS (
+                    SELECT 1 FROM truck
+                    WHERE deleted = 0
+                      AND TruckLanceCode = ?
+                      AND Store_id = ?
+                      AND DepartureTime = ?
+                )
+                """.trimIndent(),
+                truck.lane,
+                truck.departure,
+                truck.shopCode,
+                truck.shopName,
+                truck.sequence,
+                truck.storeId,
+                truck.lane,
+                truck.storeId,
+                truck.departure,
+            )
+            if (loafId != null && bunId != null && pcsId != null) {
+                seedDashboardPickLines(truck, loafId, bunId, pcsId)
+            }
+            if (inserted > 0) {
+                log.info("Added demo truck ticket {}.", truck.ticketNo)
+            }
+        }
+    }
+
+    private fun seedDashboardPickLines(truck: DemoDashTruck, loafId: Long, bunId: Long, pcsId: Long) {
+        val pickCode = "DEMO-DASH-PK-${truck.ticketNo}"
+        jdbcTemplate.update(
+            """
+            INSERT INTO pick_order (code, status, type, targetDate, deliveryOrderPickOrderId, deleted)
+            SELECT ?, 'released', 'do', TIMESTAMP(DATE_ADD(CURDATE(), INTERVAL ? DAY), ?), d.id, 0
+            FROM delivery_order_pick_order d
+            WHERE d.ticketNo = ?
+              AND NOT EXISTS (SELECT 1 FROM pick_order p WHERE p.code = ?)
+            """.trimIndent(),
+            pickCode,
+            truck.dayOffset,
+            truck.departure,
+            truck.ticketNo,
+            pickCode,
+        )
+        jdbcTemplate.update(
+            """
+            UPDATE pick_order p
+            JOIN delivery_order_pick_order d ON d.ticketNo = ?
+            SET p.deliveryOrderPickOrderId = d.id,
+                p.targetDate = TIMESTAMP(DATE_ADD(CURDATE(), INTERVAL ? DAY), ?),
+                p.deleted = 0
+            WHERE p.code = ?
+            """.trimIndent(),
+            truck.ticketNo,
+            truck.dayOffset,
+            truck.departure,
+            pickCode,
+        )
+        for ((itemId, qty) in listOf(loafId to "6", bunId to "4")) {
+            jdbcTemplate.update(
+                """
+                INSERT INTO pick_order_line (poId, itemId, qty, uomId, status, deleted)
+                SELECT p.id, ?, ?, ?, 'pending', 0
+                FROM pick_order p
+                WHERE p.code = ?
+                  AND NOT EXISTS (
+                      SELECT 1 FROM pick_order_line l
+                      WHERE l.poId = p.id AND l.itemId = ? AND l.deleted = 0
+                  )
+                """.trimIndent(),
+                itemId,
+                qty,
+                pcsId,
+                pickCode,
+                itemId,
+            )
+        }
+    }
+
+    private fun demoItemId(code: String): Long? {
+        return jdbcTemplate.query(
+            "SELECT id FROM items WHERE code = ? AND deleted = 0 ORDER BY id LIMIT 1",
+            { rs, _ -> rs.getLong("id") },
+            code,
+        ).firstOrNull()
+    }
+
+    private fun dashboardTrucks(): List<DemoDashTruck> = listOf(
+        DemoDashTruck("DEMO-DASH-0-2F-AM-A", 0, "2/F", "示範-早班", "08:30:00", "DEMO-SHP", "海港咖啡店", 1, "completed", "07:10:00", "07:48:00"),
+        DemoDashTruck("DEMO-DASH-0-2F-AM-B", 0, "2/F", "示範-早班", "08:30:00", "DEMO-BAK", "山景餅店", 2, "completed", "07:20:00", "07:55:00"),
+        DemoDashTruck("DEMO-DASH-0-2F-PM-A", 0, "2/F", "示範-午班", "14:30:00", "DEMO-BAY", "灣畔餐廳", 1, "released", "12:05:00", null),
+        DemoDashTruck("DEMO-DASH-0-2F-PM-B", 0, "2/F", "示範-午班", "14:30:00", "DEMO-CAMP", "校園小食", 2, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-0-4F-PM-A", 0, "4/F", "示範-晚班", "17:00:00", "DEMO-SHP", "海港咖啡店", 1, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-1-2F-AM-A", 1, "2/F", "示範-早班", "09:00:00", "DEMO-SHP", "海港咖啡店", 1, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-1-2F-AM-B", 1, "2/F", "示範-早班", "09:00:00", "DEMO-BAK", "山景餅店", 2, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-1-4F-NOON-A", 1, "4/F", "示範-午班", "13:30:00", "DEMO-BAY", "灣畔餐廳", 1, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-2-2F-AM-A", 2, "2/F", "示範-早班", "09:15:00", "DEMO-SHP", "海港咖啡店", 1, "pending", null, null),
+        DemoDashTruck("DEMO-DASH-2-4F-EVE-A", 2, "4/F", "示範-晚班", "16:00:00", "DEMO-CAMP", "校園小食", 1, "pending", null, null),
+    )
+
+    private data class DemoDashTruck(
+        val ticketNo: String,
+        val dayOffset: Int,
+        val storeId: String,
+        val lane: String,
+        val departure: String,
+        val shopCode: String,
+        val shopName: String,
+        val sequence: Int,
+        val status: String,
+        val releaseTime: String?,
+        val completeTime: String?,
+    )
+
+    /** Existing sandboxes were seeded without a unit price, which made PO detail fail. */
+    private fun backfillDemoPurchaseLinePrices() {
+        val updated = jdbcTemplate.update(
+            """
+            UPDATE purchase_order_line pol
+            INNER JOIN purchase_order po ON po.id = pol.purchaseOrderId
+            SET pol.price = 12.50, pol.up = 12.50
+            WHERE po.code LIKE 'DEMO-PO-%'
+              AND (pol.price IS NULL OR pol.up IS NULL)
+            """.trimIndent(),
+        )
+        if (updated > 0) {
+            log.info("Filled unit price on {} demo purchase order line(s).", updated)
+        }
+    }
+
     private fun ensureAuthorities() {
         val roles = listOf(
             "ADMIN" to "行政",
@@ -481,6 +711,8 @@ class DemoSandboxSeeder(
         uomM18 = uom
         this.qty = qty
         qtyM18 = qty
+        up = BigDecimal("12.50")
+        price = BigDecimal("12.50")
         this.status = status
         m18DataLog = dataLog
     })
diff --git a/src/main/java/com/ffii/fpsms/modules/deliveryOrder/service/DoPickOrderService.kt b/src/main/java/com/ffii/fpsms/modules/deliveryOrder/service/DoPickOrderService.kt
index acf8cc3f..f4b74033 100644
--- a/src/main/java/com/ffii/fpsms/modules/deliveryOrder/service/DoPickOrderService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/deliveryOrder/service/DoPickOrderService.kt
@@ -45,8 +45,10 @@ import com.ffii.fpsms.modules.deliveryOrder.entity.DoPickOrderLineRepository
 import com.ffii.fpsms.modules.deliveryOrder.entity.DeliveryOrderRepository
 import com.ffii.fpsms.modules.deliveryOrder.entity.DoPickOrderLineRecordRepository
 import com.ffii.fpsms.modules.deliveryOrder.entity.DoPickOrderLineRecord
+import org.springframework.beans.factory.ObjectProvider
 import org.springframework.context.annotation.Lazy
 import com.ffii.fpsms.modules.pickOrder.entity.PickOrderLineRepository
+import com.ffii.fpsms.modules.common.demo.DemoSandboxSeeder
 import com.ffii.fpsms.modules.deliveryOrder.web.models.TicketReleaseTableResponse
 import com.ffii.fpsms.modules.deliveryOrder.web.models.TruckScheduleDashboardResponse
 import com.ffii.fpsms.modules.deliveryOrder.web.models.SearchDeliveryOrderInfoRequest
@@ -64,7 +66,8 @@ open class DoPickOrderService(
     private val doPickOrderLineRepository: DoPickOrderLineRepository,
     @Lazy private val deliveryOrderRepository: DeliveryOrderRepository,
     private val doPickOrderLineRecordRepository: DoPickOrderLineRecordRepository,
-    private val pickOrderLineRepository: PickOrderLineRepository
+    private val pickOrderLineRepository: PickOrderLineRepository,
+    private val demoSandboxSeeder: ObjectProvider<DemoSandboxSeeder>,
 ) {
     open fun findReleasedDoPickOrders(): List<DoPickOrder> {
         return doPickOrderRepository.findByTicketStatusIn(
@@ -847,6 +850,7 @@ open class DoPickOrderService(
      * Groups DoPickOrder and DoPickOrderRecord data to provide summary statistics.
      */
     open fun getTruckScheduleDashboard(targetDate: LocalDate): List<TruckScheduleDashboardResponse> {
+        demoSandboxSeeder.getIfAvailable()?.alignDashboardTrucksToToday()
         // Source of truth: delivery_order_pick_order (+ linked pick_order / pick_order_line)
         //
         // NOTE: delivery_order_pick_order 沒有 truckId 欄位；dashboard 的 truckId 目前僅作為展示/鍵值用途，
diff --git a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/entity/projections/PurchaseOrderInfo.kt b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/entity/projections/PurchaseOrderInfo.kt
index 41f09a96..31bb2e62 100644
--- a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/entity/projections/PurchaseOrderInfo.kt
+++ b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/entity/projections/PurchaseOrderInfo.kt
@@ -8,9 +8,9 @@ import java.time.LocalDateTime
 interface PurchaseOrderInfo {
     val id: Long
     val code: String
-    val orderDate: LocalDateTime
-    val estimatedArrivalDate: LocalDateTime
-    val completeDate: LocalDateTime
+    val orderDate: LocalDateTime?
+    val estimatedArrivalDate: LocalDateTime?
+    val completeDate: LocalDateTime?
     val status: String
     @get:Value("#{target.supplier?.name}")
     val supplier: String?
diff --git a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/service/PurchaseOrderService.kt b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/service/PurchaseOrderService.kt
index 80a3e833..7f97bc00 100644
--- a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/service/PurchaseOrderService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/service/PurchaseOrderService.kt
@@ -268,7 +268,7 @@ open fun getPoSummariesByIds(ids: List<Long>): List<PurchaseOrderSummary> {
         return purchaseOrderRepository.findAll()
     }
 
-    open fun getDetailedPo(id: Long): Map<String, Any> {
+    open fun getDetailedPo(id: Long): Map<String, Any?> {
         // REMINDER: po code have duplication
         val po = purchaseOrderRepository.findPurchaseOrderInfoByIdAndDeletedIsFalse(id)
         val pol = polRepository.findAllByPurchaseOrderIdAndDeletedIsFalse(id)
@@ -336,7 +336,7 @@ open fun getPoSummariesByIds(ids: List<Long>): List<PurchaseOrderSummary> {
                     .sumOf { line -> line.putAwayLines?.sumOf { it.qty?.takeIf { qty -> qty > BigDecimal.ZERO } ?: BigDecimal.ZERO } ?: BigDecimal.ZERO},
                 receivedQty = thisPol.stockInLines.sumOf { it.acceptedQty ?: BigDecimal.ZERO },
                 uom = thisPol.uomM18 ?: thisPol.uom!!,
-                price = thisPol.price!!,
+                price = thisPol.price ?: thisPol.up ?: BigDecimal.ZERO,
                 status = thisPol.status!!.toString(),
                 stockInLine = inLine,
                 qcItems = qcItems,
diff --git a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/web/PurchaseOrderController.kt b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/web/PurchaseOrderController.kt
index d2ea361b..09532851 100644
--- a/src/main/java/com/ffii/fpsms/modules/purchaseOrder/web/PurchaseOrderController.kt
+++ b/src/main/java/com/ffii/fpsms/modules/purchaseOrder/web/PurchaseOrderController.kt
@@ -98,7 +98,7 @@ class PurchaseOrderController(
     }
 
     @GetMapping("/detail/{id}") // purchaseOrderId
-    fun getDetailedPo(@PathVariable id: Long): Map<String, Any> {
+    fun getDetailedPo(@PathVariable id: Long): Map<String, Any?> {
 
         /*
         // tested the sample printing function by a pdf file