diff --git a/src/app/(main)/settings/itemDefaultShelfLife/page.tsx b/src/app/(main)/settings/itemDefaultShelfLife/page.tsx
new file mode 100644
index 00000000..e4d11586
--- /dev/null
+++ b/src/app/(main)/settings/itemDefaultShelfLife/page.tsx
@@ -0,0 +1,21 @@
+import ItemDefaultShelfLifeSettings from "@/components/ItemDefaultShelfLifeSettings/ItemDefaultShelfLifeSettings";
+import { getServerI18n, I18nProvider } from "@/i18n";
+import { Stack, Typography } from "@mui/material";
+import { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: "Item default shelf life",
+};
+
+export default async function ItemDefaultShelfLifePage() {
+  const { t } = await getServerI18n("itemDefaultShelfLife");
+
+  return (
+    <I18nProvider namespaces={["itemDefaultShelfLife", "navigation", "common"]}>
+      <Stack spacing={2}>
+        <Typography variant="h4">{t("title")}</Typography>
+        <ItemDefaultShelfLifeSettings />
+      </Stack>
+    </I18nProvider>
+  );
+}
diff --git a/src/app/api/bagPrint/actions.ts b/src/app/api/bagPrint/actions.ts
index 5ec95ec8..ad637f2e 100644
--- a/src/app/api/bagPrint/actions.ts
+++ b/src/app/api/bagPrint/actions.ts
@@ -167,10 +167,23 @@ export async function downloadOnPackQrZip(
   return res.blob();
 }
 
+export type OnPackZipDownload = {
+  blob: Blob;
+  skippedWithoutExpiry: string[];
+};
+
+function skippedWithoutExpiryFromResponse(res: Response): string[] {
+  const raw = res.headers.get("X-OnPack-Skipped-Expiry") ?? "";
+  return raw
+    .split(",")
+    .map((s) => s.trim().toUpperCase())
+    .filter(Boolean);
+}
+
 /** 汁水機 OnPack — same as QR ZIP, plus LOGO_EXP BMP from item_default_shelf_life. */
 export async function downloadOnPackQrZipWithExpiry(
   request: OnPackQrDownloadRequest,
-): Promise<Blob> {
+): Promise<OnPackZipDownload> {
   const url = `${NEXT_PUBLIC_API_URL}/plastic/download-onpack-qr-with-expiry`;
   const res = await clientAuthFetch(url, {
     method: "POST",
@@ -182,7 +195,10 @@ export async function downloadOnPackQrZipWithExpiry(
     throw await zipDownloadError(res);
   }
 
-  return res.blob();
+  return {
+    blob: await res.blob(),
+    skippedWithoutExpiry: skippedWithoutExpiryFromResponse(res),
+  };
 }
 
 /** OnPack2023 檸檬機 — text QR template (`onpack2030_2`), no separate .bmp */
@@ -206,7 +222,7 @@ export async function downloadOnPackTextQrZip(
 /** OnPack2023 檸檬機 — same as text ZIP, plus TEXT_EXP from item_default_shelf_life. */
 export async function downloadOnPackTextQrZipWithExpiry(
   request: OnPackQrDownloadRequest,
-): Promise<Blob> {
+): Promise<OnPackZipDownload> {
   const url = `${NEXT_PUBLIC_API_URL}/plastic/download-onpack-qr-text-with-expiry`;
   const res = await clientAuthFetch(url, {
     method: "POST",
@@ -218,7 +234,10 @@ export async function downloadOnPackTextQrZipWithExpiry(
     throw await zipDownloadError(res);
   }
 
-  return res.blob();
+  return {
+    blob: await res.blob(),
+    skippedWithoutExpiry: skippedWithoutExpiryFromResponse(res),
+  };
 }
 
 export type OnPackMachine = "juice" | "lemon";
@@ -251,6 +270,75 @@ export interface OnPackSupportedCatalogDto {
   lemon: OnPackSupportedItemDto[];
 }
 
+export interface OnPackExpiryItemCodeDto {
+  machine: string;
+  itemCode: string;
+  printName?: string | null;
+  defaultPrintName?: string | null;
+  defaultDays?: number | null;
+  minus18Days?: number | null;
+  useMinus18?: boolean;
+  effectiveDays?: number | null;
+}
+
+export type OnPackExpiryItemCodeUpdate = {
+  itemCode: string;
+  machine?: OnPackMachine;
+  printName?: string | null;
+  useMinus18?: boolean;
+};
+
+export async function fetchOnPackExpiryCodes(machine: OnPackMachine = "juice"): Promise<OnPackExpiryItemCodeDto[]> {
+  const url = `${NEXT_PUBLIC_API_URL}/plastic/onpack-templates/expiry-codes?machine=${encodeURIComponent(machine)}`;
+  const res = await clientAuthFetch(url, { method: "GET" });
+  if (!res.ok) {
+    throw await parseBagPrintApiError(res, "讀取到期日 ZIP 品號");
+  }
+  return (await res.json()) as OnPackExpiryItemCodeDto[];
+}
+
+export async function addOnPackExpiryCode(
+  itemCode: string,
+  machine: OnPackMachine = "juice",
+): Promise<OnPackExpiryItemCodeDto> {
+  const url = `${NEXT_PUBLIC_API_URL}/plastic/onpack-templates/expiry-codes`;
+  const res = await clientAuthFetch(url, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ itemCode, machine }),
+  });
+  if (!res.ok) {
+    throw await parseBagPrintApiError(res, "新增到期日 ZIP 品號");
+  }
+  return (await res.json()) as OnPackExpiryItemCodeDto;
+}
+
+export async function updateOnPackExpiryCode(
+  body: OnPackExpiryItemCodeUpdate,
+): Promise<OnPackExpiryItemCodeDto> {
+  const url = `${NEXT_PUBLIC_API_URL}/plastic/onpack-templates/expiry-codes`;
+  const res = await clientAuthFetch(url, {
+    method: "PUT",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(body),
+  });
+  if (!res.ok) {
+    throw await parseBagPrintApiError(res, "更新到期日 ZIP 品號");
+  }
+  return (await res.json()) as OnPackExpiryItemCodeDto;
+}
+
+export async function deleteOnPackExpiryCode(
+  itemCode: string,
+  machine: OnPackMachine = "juice",
+): Promise<void> {
+  const url = `${NEXT_PUBLIC_API_URL}/plastic/onpack-templates/expiry-codes?machine=${encodeURIComponent(machine)}&itemCode=${encodeURIComponent(itemCode)}`;
+  const res = await clientAuthFetch(url, { method: "DELETE" });
+  if (!res.ok && res.status !== 204) {
+    throw await parseBagPrintApiError(res, "刪除到期日 ZIP 品號");
+  }
+}
+
 export async function fetchOnPackSupportedCatalog(): Promise<OnPackSupportedCatalogDto> {
   const url = `${NEXT_PUBLIC_API_URL}/plastic/onpack-templates/supported`;
   const res = await clientAuthFetch(url, { method: "GET" });
diff --git a/src/app/api/settings/itemDefaultShelfLife/client.ts b/src/app/api/settings/itemDefaultShelfLife/client.ts
new file mode 100644
index 00000000..03f99b35
--- /dev/null
+++ b/src/app/api/settings/itemDefaultShelfLife/client.ts
@@ -0,0 +1,88 @@
+"use client";
+
+import { clientAuthFetch } from "@/app/utils/clientAuthFetch";
+import { NEXT_PUBLIC_API_URL } from "@/config/api";
+
+const base = NEXT_PUBLIC_API_URL;
+
+export type ItemDefaultShelfLifeRow = {
+  id: number;
+  itemCode: string;
+  itemName?: string | null;
+  defaultDays?: number | null;
+  minus18Days?: number | null;
+  useMinus18: boolean;
+  openedDays?: number | null;
+  storageC?: string | null;
+  remarks?: string | null;
+  effectiveDays?: number | null;
+};
+
+export type ItemDefaultShelfLifeInput = {
+  itemCode: string;
+  defaultDays?: number | null;
+  minus18Days?: number | null;
+  useMinus18: boolean;
+  openedDays?: number | null;
+  storageC?: string | null;
+  remarks?: string | null;
+};
+
+async function parseJson<T>(res: Response): Promise<T> {
+  if (!res.ok) {
+    throw new Error(await readError(res));
+  }
+  return res.json() as Promise<T>;
+}
+
+async function readError(res: Response): Promise<string> {
+  const text = await res.text().catch(() => "");
+  if (!text) return `HTTP ${res.status}`;
+  try {
+    const json = JSON.parse(text) as { message?: string; error?: string };
+    return json.message || json.error || text;
+  } catch {
+    return text;
+  }
+}
+
+export async function fetchItemDefaultShelfLives(
+  q?: string,
+): Promise<ItemDefaultShelfLifeRow[]> {
+  const url = new URL(`${base}/itemDefaultShelfLives`);
+  if (q?.trim()) url.searchParams.set("q", q.trim());
+  const res = await clientAuthFetch(url.toString(), { method: "GET" });
+  return parseJson<ItemDefaultShelfLifeRow[]>(res);
+}
+
+export async function createItemDefaultShelfLife(
+  data: ItemDefaultShelfLifeInput,
+): Promise<ItemDefaultShelfLifeRow> {
+  const res = await clientAuthFetch(`${base}/itemDefaultShelfLives`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(data),
+  });
+  return parseJson<ItemDefaultShelfLifeRow>(res);
+}
+
+export async function updateItemDefaultShelfLife(
+  id: number,
+  data: ItemDefaultShelfLifeInput,
+): Promise<ItemDefaultShelfLifeRow> {
+  const res = await clientAuthFetch(`${base}/itemDefaultShelfLives/${id}`, {
+    method: "PUT",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(data),
+  });
+  return parseJson<ItemDefaultShelfLifeRow>(res);
+}
+
+export async function deleteItemDefaultShelfLife(
+  id: number,
+): Promise<ItemDefaultShelfLifeRow[]> {
+  const res = await clientAuthFetch(`${base}/itemDefaultShelfLives/${id}`, {
+    method: "DELETE",
+  });
+  return parseJson<ItemDefaultShelfLifeRow[]>(res);
+}
diff --git a/src/components/BagPrint/BagPrintSearch.tsx b/src/components/BagPrint/BagPrintSearch.tsx
index 428b532b..64ed9fe6 100644
--- a/src/components/BagPrint/BagPrintSearch.tsx
+++ b/src/components/BagPrint/BagPrintSearch.tsx
@@ -1,7 +1,8 @@
 "use client";
 
-import React, { useCallback, useEffect, useRef, useState } from "react";
+import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import {
+  Alert,
   Box,
   Button,
   Chip,
@@ -20,6 +21,15 @@ import {
   DialogActions,
   TextField,
   Snackbar,
+  Switch,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  TableSortLabel,
+  Tooltip,
 } from "@mui/material";
 import ChevronLeft from "@mui/icons-material/ChevronLeft";
 import ChevronRight from "@mui/icons-material/ChevronRight";
@@ -33,15 +43,14 @@ import {
   downloadOnPackQrZipWithExpiry,
   downloadOnPackTextQrZip,
   downloadOnPackTextQrZipWithExpiry,
-  deleteOnPackTemplate,
   fetchJobOrders,
+  fetchOnPackExpiryCodes,
+  addOnPackExpiryCode,
+  updateOnPackExpiryCode,
+  deleteOnPackExpiryCode,
   fetchOnPackSupportedCatalog,
-  listOnPackTemplates,
-  uploadOnPackTemplates,
   JobOrderListItem,
-  OnPackMachine,
-  OnPackSupportedCatalogDto,
-  OnPackTemplateFileDto,
+  OnPackExpiryItemCodeDto,
 } from "@/app/api/bagPrint/actions";
 import dayjs from "dayjs";
 import { useSession } from "next-auth/react";
@@ -129,15 +138,85 @@ function getBatch(jo: JobOrderListItem): string {
   return (jo.lotNo || "—").trim() || "—";
 }
 
-function printableCodes(items: { itemCode: string; printable: boolean }[] | undefined): Set<string> {
-  return new Set((items ?? []).filter((r) => r.printable).map((r) => r.itemCode.toUpperCase()));
+function expiryCodeSet(rows: OnPackExpiryItemCodeDto[]): Set<string> {
+  return new Set(rows.map((r) => r.itemCode.trim().toUpperCase()).filter(Boolean));
 }
 
-function supportLabel(row: { inDatabase: boolean; builtin: boolean; printable: boolean }): string {
-  if (!row.printable) return "缺模板";
-  if (row.inDatabase && row.builtin) return "資料庫+內建";
-  if (row.inDatabase) return "資料庫";
-  return "內建";
+function daysLabel(value: number | null | undefined): string {
+  return value == null ? "未設" : String(value);
+}
+
+type ExpirySortKey =
+  | "itemCode"
+  | "name"
+  | "defaultDays"
+  | "minus18Days"
+  | "useMinus18"
+  | "effectiveDays";
+
+function displayName(row: OnPackExpiryItemCodeDto): string {
+  return (row.printName || row.defaultPrintName || "").trim();
+}
+
+function cmpText(a: string, b: string): number {
+  return a.localeCompare(b, "zh-Hant", { numeric: true, sensitivity: "base" });
+}
+
+/** Null (未設) sorts first on asc so unset rows are easy to find. */
+function cmpDays(a: number | null | undefined, b: number | null | undefined): number {
+  const av = a == null ? Number.NEGATIVE_INFINITY : a;
+  const bv = b == null ? Number.NEGATIVE_INFINITY : b;
+  return av - bv;
+}
+
+function skippedExpirySnackbar(okMessage: string, skipped: string[]): {
+  open: true;
+  message: string;
+  severity: "success" | "warning";
+  duration: number;
+} {
+  if (skipped.length === 0) {
+    return { open: true, message: okMessage, severity: "success", duration: 3000 };
+  }
+  return {
+    open: true,
+    message: `${okMessage}。以下品號沒有到期日，已略過不入 ZIP：${skipped.join("、")}。請到設定 → 物品預設保質期新增。`,
+    severity: "warning",
+    duration: 10000,
+  };
+}
+
+function sortExpiryRows(
+  rows: OnPackExpiryItemCodeDto[],
+  key: ExpirySortKey,
+  dir: "asc" | "desc",
+): OnPackExpiryItemCodeDto[] {
+  const sign = dir === "asc" ? 1 : -1;
+  return [...rows].sort((a, b) => {
+    let cmp = 0;
+    switch (key) {
+      case "itemCode":
+        cmp = cmpText(a.itemCode, b.itemCode);
+        break;
+      case "name":
+        cmp = cmpText(displayName(a), displayName(b));
+        break;
+      case "defaultDays":
+        cmp = cmpDays(a.defaultDays, b.defaultDays);
+        break;
+      case "minus18Days":
+        cmp = cmpDays(a.minus18Days, b.minus18Days);
+        break;
+      case "useMinus18":
+        cmp = Number(a.useMinus18 === true) - Number(b.useMinus18 === true);
+        break;
+      case "effectiveDays":
+        cmp = cmpDays(a.effectiveDays, b.effectiveDays);
+        break;
+    }
+    if (cmp === 0) cmp = cmpText(a.itemCode, b.itemCode);
+    return cmp * sign;
+  });
 }
 
 const BagPrintSearch: React.FC = () => {
@@ -158,16 +237,23 @@ const BagPrintSearch: React.FC = () => {
   const [printing, setPrinting] = useState(false);
   const [settingsOpen, setSettingsOpen] = useState(false);
   const [templatesOpen, setTemplatesOpen] = useState(false);
-  const [templateMachine, setTemplateMachine] = useState<OnPackMachine>("juice");
-  const [templateItemCode, setTemplateItemCode] = useState("");
-  const [templateFiles, setTemplateFiles] = useState<OnPackTemplateFileDto[]>([]);
-  const [templateLoading, setTemplateLoading] = useState(false);
-  const [templateUploading, setTemplateUploading] = useState(false);
-  const [supportedCatalog, setSupportedCatalog] = useState<OnPackSupportedCatalogDto | null>(null);
-  const templateUploadRef = useRef(false);
-  const templateDeleteRef = useRef(false);
-  const templateFileInputRef = useRef<HTMLInputElement | null>(null);
-  const [snackbar, setSnackbar] = useState<{ open: boolean; message: string; severity?: "success" | "info" | "error" }>({ open: false, message: "" });
+  const [expiryCodes, setExpiryCodes] = useState<OnPackExpiryItemCodeDto[]>([]);
+  const [expiryCodeInput, setExpiryCodeInput] = useState("");
+  const [expiryCodesLoading, setExpiryCodesLoading] = useState(false);
+  const [nameDrafts, setNameDrafts] = useState<Record<string, string>>({});
+  const [expirySortKey, setExpirySortKey] = useState<ExpirySortKey>("itemCode");
+  const [expirySortDir, setExpirySortDir] = useState<"asc" | "desc">("asc");
+  const [lemonCodeSet, setLemonCodeSet] = useState<Set<string>>(() => new Set());
+  const expiryAddRef = useRef(false);
+  const expiryDeleteRef = useRef(false);
+  const expirySaveRef = useRef<Set<string>>(new Set());
+  const expiryToggleRef = useRef<Set<string>>(new Set());
+  const [snackbar, setSnackbar] = useState<{
+    open: boolean;
+    message: string;
+    severity?: "success" | "info" | "warning" | "error";
+    duration?: number;
+  }>({ open: false, message: "" });
   const [settings, setSettings] = useState(DEFAULT_SETTINGS);
   const [printerConnected, setPrinterConnected] = useState(false);
   const [printerMessage, setPrinterMessage] = useState("列印機未連接");
@@ -388,7 +474,7 @@ const BagPrintSearch: React.FC = () => {
     downloadingOnPackExpRef.current = true;
     setDownloadingOnPackExp(true);
     try {
-      const blob = await downloadOnPackQrZipWithExpiry({
+      const { blob, skippedWithoutExpiry } = await downloadOnPackQrZipWithExpiry({
         jobOrders: onPackJobOrders,
         planDate,
       });
@@ -402,7 +488,7 @@ const BagPrintSearch: React.FC = () => {
       link.remove();
       window.URL.revokeObjectURL(url);
 
-      setSnackbar({ open: true, message: "OnPack 汁水機（含到期日）ZIP 已下載", severity: "success" });
+      setSnackbar(skippedExpirySnackbar("OnPack 汁水機（含到期日）ZIP 已下載", skippedWithoutExpiry));
     } catch (e) {
       setSnackbar({
         open: true,
@@ -465,7 +551,7 @@ const BagPrintSearch: React.FC = () => {
     downloadingOnPackTextExpRef.current = true;
     setDownloadingOnPackTextExp(true);
     try {
-      const blob = await downloadOnPackTextQrZipWithExpiry({
+      const { blob, skippedWithoutExpiry } = await downloadOnPackTextQrZipWithExpiry({
         jobOrders: onPackJobOrders,
         planDate,
       });
@@ -479,7 +565,7 @@ const BagPrintSearch: React.FC = () => {
       link.remove();
       window.URL.revokeObjectURL(url);
 
-      setSnackbar({ open: true, message: "OnPack2023檸檬機（含到期日）ZIP 已下載", severity: "success" });
+      setSnackbar(skippedExpirySnackbar("OnPack2023檸檬機（含到期日）ZIP 已下載", skippedWithoutExpiry));
     } catch (e) {
       setSnackbar({
         open: true,
@@ -492,97 +578,166 @@ const BagPrintSearch: React.FC = () => {
     }
   };
 
-  const loadTemplateFiles = useCallback(async (machine: OnPackMachine) => {
-    setTemplateLoading(true);
+  const loadExpiryCodes = useCallback(async (notify = false) => {
+    setExpiryCodesLoading(true);
     try {
-      const rows = await listOnPackTemplates(machine);
-      setTemplateFiles(rows);
-    } catch (e) {
-      setSnackbar({
-        open: true,
-        message: e instanceof Error ? e.message : "讀取 OnPack 模板失敗",
-        severity: "error",
-      });
-    } finally {
-      setTemplateLoading(false);
-    }
-  }, []);
-
-  const loadSupportedCatalog = useCallback(async (notify = false) => {
-    try {
-      setSupportedCatalog(await fetchOnPackSupportedCatalog());
+      const rows = await fetchOnPackExpiryCodes("juice");
+      setExpiryCodes(rows);
+      setNameDrafts(
+        Object.fromEntries(
+          rows.map((r) => [r.itemCode, r.printName || r.defaultPrintName || ""]),
+        ),
+      );
     } catch (e) {
       if (notify) {
         setSnackbar({
           open: true,
-          message: e instanceof Error ? e.message : "讀取 OnPack 支援清單失敗",
+          message: e instanceof Error ? e.message : "讀取到期日 ZIP 品號失敗",
           severity: "error",
         });
       }
+    } finally {
+      setExpiryCodesLoading(false);
     }
   }, []);
 
   useEffect(() => {
-    void loadSupportedCatalog();
-  }, [loadSupportedCatalog]);
+    void loadExpiryCodes();
+  }, [loadExpiryCodes]);
+
+  useEffect(() => {
+    void (async () => {
+      try {
+        const catalog = await fetchOnPackSupportedCatalog();
+        setLemonCodeSet(
+          new Set(
+            (catalog.lemon ?? [])
+              .filter((row) => row.printable)
+              .map((row) => row.itemCode.trim().toUpperCase())
+              .filter(Boolean),
+          ),
+        );
+      } catch {
+        /* 檸檬機標籤可沒有；不擋畫面 */
+      }
+    })();
+  }, []);
 
   useEffect(() => {
     if (!templatesOpen) return;
-    void loadTemplateFiles(templateMachine);
-    void loadSupportedCatalog(true);
-  }, [templatesOpen, templateMachine, loadTemplateFiles, loadSupportedCatalog]);
+    void loadExpiryCodes(true);
+  }, [templatesOpen, loadExpiryCodes]);
 
-  const handleUploadTemplates = async (fileList: FileList | null) => {
-    if (templateUploadRef.current) return;
-    const itemCode = templateItemCode.trim();
+  const handleAddExpiryCode = async () => {
+    if (expiryAddRef.current) return;
+    const itemCode = expiryCodeInput.trim();
     if (!itemCode) {
       setSnackbar({ open: true, message: "請先填寫品號", severity: "error" });
       return;
     }
-    if (!fileList || fileList.length === 0) {
-      setSnackbar({ open: true, message: "請選擇 .image / .bmp / .job 檔案", severity: "error" });
-      return;
+    expiryAddRef.current = true;
+    try {
+      await addOnPackExpiryCode(itemCode, "juice");
+      setExpiryCodeInput("");
+      setSnackbar({ open: true, message: `已加入到期日 ZIP：${itemCode.toUpperCase()}`, severity: "success" });
+      await loadExpiryCodes();
+    } catch (e) {
+      setSnackbar({
+        open: true,
+        message: e instanceof Error ? e.message : "新增到期日 ZIP 品號失敗",
+        severity: "error",
+      });
+    } finally {
+      expiryAddRef.current = false;
     }
-    templateUploadRef.current = true;
-    setTemplateUploading(true);
+  };
+
+  const handleDeleteExpiryCode = async (itemCode: string) => {
+    if (expiryDeleteRef.current) return;
+    expiryDeleteRef.current = true;
     try {
-      const result = await uploadOnPackTemplates(templateMachine, itemCode, Array.from(fileList));
+      await deleteOnPackExpiryCode(itemCode, "juice");
+      setSnackbar({ open: true, message: `已從到期日 ZIP 移除 ${itemCode}`, severity: "success" });
+      await loadExpiryCodes();
+    } catch (e) {
       setSnackbar({
         open: true,
-        message: `已儲存 ${result.itemCode}：${result.saved.join("、")}`,
-        severity: "success",
+        message: e instanceof Error ? e.message : "刪除到期日 ZIP 品號失敗",
+        severity: "error",
       });
-      if (templateFileInputRef.current) templateFileInputRef.current.value = "";
-      await loadTemplateFiles(templateMachine);
-      await loadSupportedCatalog();
+    } finally {
+      expiryDeleteRef.current = false;
+    }
+  };
+
+  const applyExpiryRow = (updated: OnPackExpiryItemCodeDto) => {
+    setExpiryCodes((prev) => prev.map((r) => (r.itemCode === updated.itemCode ? updated : r)));
+    setNameDrafts((prev) => ({
+      ...prev,
+      [updated.itemCode]: updated.printName || updated.defaultPrintName || "",
+    }));
+  };
+
+  const handleSaveExpiryPrintName = async (itemCode: string) => {
+    if (expirySaveRef.current.has(itemCode)) return;
+    expirySaveRef.current.add(itemCode);
+    try {
+      const updated = await updateOnPackExpiryCode({
+        itemCode,
+        machine: "juice",
+        printName: (nameDrafts[itemCode] ?? "").trim(),
+      });
+      applyExpiryRow(updated);
+      setSnackbar({ open: true, message: `已儲存 ${itemCode} 列印名稱`, severity: "success" });
     } catch (e) {
       setSnackbar({
         open: true,
-        message: e instanceof Error ? e.message : "上傳 OnPack 模板失敗",
+        message: e instanceof Error ? e.message : "儲存列印名稱失敗",
         severity: "error",
       });
     } finally {
-      setTemplateUploading(false);
-      templateUploadRef.current = false;
+      expirySaveRef.current.delete(itemCode);
     }
   };
 
-  const handleDeleteTemplate = async (row: OnPackTemplateFileDto) => {
-    if (templateDeleteRef.current) return;
-    templateDeleteRef.current = true;
+  const handleToggleUseMinus18 = async (itemCode: string, useMinus18: boolean) => {
+    if (expiryToggleRef.current.has(itemCode)) return;
+    expiryToggleRef.current.add(itemCode);
     try {
-      await deleteOnPackTemplate(row.id);
-      setSnackbar({ open: true, message: `已刪除 ${row.itemCode} / ${row.fileName}`, severity: "success" });
-      await loadTemplateFiles(templateMachine);
-      await loadSupportedCatalog();
+      const updated = await updateOnPackExpiryCode({
+        itemCode,
+        machine: "juice",
+        useMinus18,
+      });
+      applyExpiryRow(updated);
+      setSnackbar({
+        open: true,
+        message: useMinus18 ? `已改用 ${itemCode} 的 -18 天數` : `已改用 ${itemCode} 的冷藏天數`,
+        severity: "success",
+      });
     } catch (e) {
       setSnackbar({
         open: true,
-        message: e instanceof Error ? e.message : "刪除失敗",
+        message: e instanceof Error ? e.message : "更新保質期旗標失敗",
         severity: "error",
       });
     } finally {
-      templateDeleteRef.current = false;
+      expiryToggleRef.current.delete(itemCode);
+    }
+  };
+
+  const juiceExpiryCodeSet = expiryCodeSet(expiryCodes);
+  const sortedExpiryCodes = useMemo(
+    () => sortExpiryRows(expiryCodes, expirySortKey, expirySortDir),
+    [expiryCodes, expirySortKey, expirySortDir],
+  );
+
+  const onExpirySort = (key: ExpirySortKey) => {
+    if (expirySortKey === key) {
+      setExpirySortDir((d) => (d === "asc" ? "desc" : "asc"));
+    } else {
+      setExpirySortKey(key);
+      setExpirySortDir("asc");
     }
   };
 
@@ -613,7 +768,7 @@ const BagPrintSearch: React.FC = () => {
             </Button>
             {canSeeOnPackAdmin && (
               <Button variant="outlined" onClick={() => setTemplatesOpen(true)}>
-                OnPack 模板
+                OnPack 到期日 ZIP
               </Button>
             )}
             <Box
@@ -731,8 +886,8 @@ const BagPrintSearch: React.FC = () => {
                 const qtyStr = formatQty(jo.reqQty);
                 const isSelected = selectedId === jo.id;
                 const codeKey = (jo.itemCode || "").trim().toUpperCase();
-                const juiceOk = printableCodes(supportedCatalog?.juice).has(codeKey);
-                const lemonOk = printableCodes(supportedCatalog?.lemon).has(codeKey);
+                const juiceExpiryOk = juiceExpiryCodeSet.has(codeKey);
+                const lemonOk = lemonCodeSet.has(codeKey);
                 return (
                   <Paper
                     key={jo.id}
@@ -769,7 +924,7 @@ const BagPrintSearch: React.FC = () => {
                         {jo.itemCode || "—"}
                       </Typography>
                       <Stack direction="row" spacing={0.5} flexWrap="wrap" useFlexGap sx={{ mt: 0.5 }}>
-                        {juiceOk ? <Chip size="small" label="汁水機" color="primary" /> : null}
+                        {juiceExpiryOk ? <Chip size="small" label="汁水機" color="primary" /> : null}
                         {lemonOk ? <Chip size="small" label="檸檬機" color="secondary" /> : null}
                       </Stack>
                     </Box>
@@ -936,104 +1091,230 @@ const BagPrintSearch: React.FC = () => {
       <Dialog
         open={templatesOpen && canSeeOnPackAdmin}
         onClose={() => setTemplatesOpen(false)}
-        maxWidth="md"
+        maxWidth="xl"
         fullWidth
+        scroll="paper"
+        PaperProps={{ sx: { height: "90vh", maxHeight: "90vh" } }}
       >
-        <DialogTitle>OnPack 支援品號 / 模板</DialogTitle>
-        <DialogContent>
-          <Stack spacing={2} sx={{ mt: 1 }}>
-            <Typography variant="body2" color="text.secondary">
-              下列為目前可做 OnPack 列印的品號（內建只列 PP 品號）。上傳新套模板後會自動加入清單。下方「刪除」只作用於資料庫檔，內建檔無法從畫面移除。
+        <DialogTitle>OnPack 到期日 ZIP 品號</DialogTitle>
+        <DialogContent
+          sx={{
+            display: "flex",
+            flexDirection: "column",
+            overflow: "hidden",
+            pt: 1,
+          }}
+        >
+          <Stack spacing={1.5} sx={{ flexShrink: 0, mb: 1 }}>
+            <Typography variant="subtitle2" color="primary">
+              汁水機（{expiryCodes.length}）
             </Typography>
-            <Stack direction={{ xs: "column", sm: "row" }} spacing={2} alignItems="flex-start">
-              <Box sx={{ flex: 1, minWidth: 0 }}>
-                <Typography variant="subtitle2" color="primary" sx={{ mb: 0.5 }}>
-                  汁水機 OnPack（{printableCodes(supportedCatalog?.juice).size}）
-                </Typography>
-                <Box sx={{ maxHeight: 180, overflow: "auto", pr: 1 }}>
-                  {(supportedCatalog?.juice ?? []).filter((r) => r.printable).map((row) => (
-                    <Typography key={`j-${row.itemCode}`} variant="body2" sx={{ fontFamily: "monospace" }}>
-                      {row.itemCode} · {supportLabel(row)}
-                    </Typography>
-                  ))}
-                </Box>
-              </Box>
-              <Box sx={{ flex: 1, minWidth: 0 }}>
-                <Typography variant="subtitle2" color="secondary" sx={{ mb: 0.5 }}>
-                  檸檬機 OnPack（{printableCodes(supportedCatalog?.lemon).size}）
-                </Typography>
-                <Box sx={{ maxHeight: 180, overflow: "auto", pr: 1 }}>
-                  {(supportedCatalog?.lemon ?? []).filter((r) => r.printable).map((row) => (
-                    <Typography key={`l-${row.itemCode}`} variant="body2" sx={{ fontFamily: "monospace" }}>
-                      {row.itemCode} · {supportLabel(row)}
-                    </Typography>
-                  ))}
-                </Box>
-              </Box>
-            </Stack>
             <Typography variant="body2" color="text.secondary">
-              新增品號：上傳該套 <code>.image</code> / <code>.bmp</code> / <code>.job</code>。汁水機請上傳{" "}
-              <code>品號.image</code>；檸檬機請一併上傳模板裡引用的 BMP。
+              「下載 OnPack 汁水機（含到期日）」只用此清單。名稱印在 Product 行，過長可改短後按儲存。
+              點欄位標題可排序；冷藏／-18／列印第一次點擊會把「未設」排到最前。
             </Typography>
-            <FormControl size="small" sx={{ minWidth: 200 }}>
-              <InputLabel>機台</InputLabel>
-              <Select
-                value={templateMachine}
-                label="機台"
-                onChange={(e) => setTemplateMachine(e.target.value as OnPackMachine)}
-              >
-                <MenuItem value="juice">汁水機</MenuItem>
-                <MenuItem value="lemon">檸檬機</MenuItem>
-              </Select>
-            </FormControl>
-            <TextField
-              label="品號"
-              size="small"
-              placeholder="例如 PP2211"
-              value={templateItemCode}
-              onChange={(e) => setTemplateItemCode(e.target.value)}
-            />
-            <Button variant="contained" component="label" disabled={templateUploading}>
-              {templateUploading ? "上傳中..." : "選擇檔案並上傳"}
-              <input
-                ref={templateFileInputRef}
-                type="file"
-                hidden
-                multiple
-                accept=".image,.bmp,.job"
-                onChange={(e) => {
-                  void handleUploadTemplates(e.target.files);
+            <Stack direction="row" spacing={1} alignItems="center">
+              <TextField
+                label="新增品號"
+                size="small"
+                placeholder="例如 PP2211"
+                value={expiryCodeInput}
+                onChange={(e) => setExpiryCodeInput(e.target.value)}
+                onKeyDown={(e) => {
+                  if (e.key === "Enter") {
+                    e.preventDefault();
+                    void handleAddExpiryCode();
+                  }
                 }}
+                sx={{ minWidth: 180 }}
               />
-            </Button>
-            {templateLoading ? (
-              <Box sx={{ display: "flex", justifyContent: "center", py: 2 }}>
-                <CircularProgress size={24} />
-              </Box>
-            ) : templateFiles.length === 0 ? (
-              <Typography color="text.secondary">資料庫尚無此機台的上傳檔</Typography>
-            ) : (
-              <Stack spacing={0.5} sx={{ maxHeight: 320, overflow: "auto" }}>
-                {templateFiles.map((row) => (
-                  <Stack
-                    key={row.id}
-                    direction="row"
-                    alignItems="center"
-                    justifyContent="space-between"
-                    spacing={1}
-                    sx={{ py: 0.5, borderBottom: "1px solid #e0e0e0" }}
-                  >
-                    <Typography variant="body2" sx={{ fontFamily: "monospace" }}>
-                      {row.itemCode} · {row.fileName} · {Math.max(1, Math.round(row.byteSize / 1024))} KB
-                    </Typography>
-                    <Button size="small" color="error" onClick={() => void handleDeleteTemplate(row)}>
-                      刪除
-                    </Button>
-                  </Stack>
-                ))}
-              </Stack>
-            )}
+              <Button variant="contained" onClick={() => void handleAddExpiryCode()}>
+                加入
+              </Button>
+            </Stack>
           </Stack>
+          {expiryCodesLoading ? (
+            <Box sx={{ display: "flex", justifyContent: "center", py: 1 }}>
+              <CircularProgress size={20} />
+            </Box>
+          ) : expiryCodes.length === 0 ? (
+            <Typography color="text.secondary">清單空白</Typography>
+          ) : (
+            <TableContainer sx={{ flex: 1, minHeight: 0, overflow: "auto" }}>
+              <Table size="small" stickyHeader>
+                <TableHead>
+                  <TableRow>
+                    <TableCell sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
+                      <TableSortLabel
+                        active={expirySortKey === "itemCode"}
+                        direction={expirySortKey === "itemCode" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("itemCode")}
+                      >
+                        品號
+                      </TableSortLabel>
+                    </TableCell>
+                    <TableCell sx={{ fontWeight: 700 }}>
+                      <TableSortLabel
+                        active={expirySortKey === "name"}
+                        direction={expirySortKey === "name" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("name")}
+                      >
+                        中文名稱＋單位
+                      </TableSortLabel>
+                    </TableCell>
+                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
+                      <TableSortLabel
+                        active={expirySortKey === "defaultDays"}
+                        direction={expirySortKey === "defaultDays" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("defaultDays")}
+                      >
+                        冷藏
+                      </TableSortLabel>
+                      <Typography variant="caption" display="block" color="text.secondary">
+                        天
+                      </Typography>
+                    </TableCell>
+                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
+                      <TableSortLabel
+                        active={expirySortKey === "minus18Days"}
+                        direction={expirySortKey === "minus18Days" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("minus18Days")}
+                      >
+                        -18
+                      </TableSortLabel>
+                      <Typography variant="caption" display="block" color="text.secondary">
+                        天
+                      </Typography>
+                    </TableCell>
+                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
+                      <TableSortLabel
+                        active={expirySortKey === "useMinus18"}
+                        direction={expirySortKey === "useMinus18" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("useMinus18")}
+                      >
+                        用 -18
+                      </TableSortLabel>
+                    </TableCell>
+                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
+                      <TableSortLabel
+                        active={expirySortKey === "effectiveDays"}
+                        direction={expirySortKey === "effectiveDays" ? expirySortDir : "asc"}
+                        onClick={() => onExpirySort("effectiveDays")}
+                      >
+                        列印
+                      </TableSortLabel>
+                      <Typography variant="caption" display="block" color="text.secondary">
+                        天
+                      </Typography>
+                    </TableCell>
+                    <TableCell align="right" sx={{ fontWeight: 700 }}>
+                      操作
+                    </TableCell>
+                  </TableRow>
+                </TableHead>
+                <TableBody>
+                  {sortedExpiryCodes.map((row) => {
+                      const draft = nameDrafts[row.itemCode] ?? "";
+                      const savedName = row.printName || row.defaultPrintName || "";
+                      const nameDirty = draft.trim() !== savedName.trim();
+                      const hasShelf = row.defaultDays != null || row.minus18Days != null;
+                      const canUseMinus18 = row.minus18Days != null && row.minus18Days > 0;
+                      const missingHint = hasShelf
+                        ? canUseMinus18
+                          ? ""
+                          : "此品號沒有 -18 天數"
+                        : "未設定保質期，請到設定 → 物品預設保質期新增";
+                      return (
+                        <TableRow key={row.itemCode} hover>
+                          <TableCell sx={{ fontFamily: "monospace", fontWeight: 700, whiteSpace: "nowrap" }}>
+                            {row.itemCode}
+                          </TableCell>
+                          <TableCell sx={{ minWidth: 280 }}>
+                            <Stack direction="row" spacing={1} alignItems="center">
+                              <TextField
+                                size="small"
+                                value={draft}
+                                onChange={(e) =>
+                                  setNameDrafts((prev) => ({ ...prev, [row.itemCode]: e.target.value }))
+                                }
+                                placeholder={row.defaultPrintName || "例如 豬肉水(1包X2千克)"}
+                                inputProps={{ maxLength: 255 }}
+                                fullWidth
+                              />
+                              <Button
+                                variant="contained"
+                                size="small"
+                                disabled={!nameDirty}
+                                onClick={() => void handleSaveExpiryPrintName(row.itemCode)}
+                              >
+                                儲存
+                              </Button>
+                            </Stack>
+                          </TableCell>
+                          <TableCell align="center">
+                            <Typography
+                              variant="h6"
+                              sx={{ fontWeight: 700, lineHeight: 1.2 }}
+                              color={row.defaultDays == null ? "warning.main" : "text.primary"}
+                            >
+                              {daysLabel(row.defaultDays)}
+                            </Typography>
+                          </TableCell>
+                          <TableCell align="center">
+                            <Typography
+                              variant="h6"
+                              sx={{ fontWeight: 700, lineHeight: 1.2 }}
+                              color={row.minus18Days == null ? "warning.main" : "text.primary"}
+                            >
+                              {daysLabel(row.minus18Days)}
+                            </Typography>
+                          </TableCell>
+                          <TableCell align="center">
+                            <Tooltip title={canUseMinus18 ? "改用 -18 天數列印到期日" : missingHint}>
+                              <span>
+                                <Switch
+                                  size="small"
+                                  checked={row.useMinus18 === true}
+                                  disabled={!canUseMinus18}
+                                  onChange={(e) => void handleToggleUseMinus18(row.itemCode, e.target.checked)}
+                                  inputProps={{ "aria-label": `${row.itemCode} 用 -18` }}
+                                />
+                              </span>
+                            </Tooltip>
+                          </TableCell>
+                          <TableCell align="center">
+                            <Typography
+                              variant="h6"
+                              sx={{ fontWeight: 800, lineHeight: 1.2 }}
+                              color={row.effectiveDays == null ? "warning.main" : "primary.main"}
+                            >
+                              {daysLabel(row.effectiveDays)}
+                            </Typography>
+                            {!hasShelf && (
+                              <Typography variant="caption" color="warning.main" display="block">
+                                未設定
+                              </Typography>
+                            )}
+                          </TableCell>
+                          <TableCell align="right">
+                            <Button
+                              size="small"
+                              color="error"
+                              onClick={() => void handleDeleteExpiryCode(row.itemCode)}
+                            >
+                              移除
+                            </Button>
+                          </TableCell>
+                        </TableRow>
+                      );
+                    })}
+                  </TableBody>
+                </Table>
+              </TableContainer>
+            )}
+          <Typography variant="body2" color="text.secondary" sx={{ flexShrink: 0, mt: 1 }}>
+            檸檬機到期日 ZIP 品號稍後加入。
+          </Typography>
         </DialogContent>
         <DialogActions>
           <Button onClick={() => setTemplatesOpen(false)}>關閉</Button>
@@ -1042,11 +1323,19 @@ const BagPrintSearch: React.FC = () => {
 
       <Snackbar
         open={snackbar.open}
-        autoHideDuration={3000}
+        autoHideDuration={snackbar.duration ?? 3000}
         onClose={() => setSnackbar((s) => ({ ...s, open: false }))}
-        message={snackbar.message}
         anchorOrigin={{ vertical: "bottom", horizontal: "center" }}
-      />
+      >
+        <Alert
+          onClose={() => setSnackbar((s) => ({ ...s, open: false }))}
+          severity={snackbar.severity ?? "info"}
+          variant="filled"
+          sx={{ width: "100%", maxWidth: 720 }}
+        >
+          {snackbar.message}
+        </Alert>
+      </Snackbar>
     </Box>
   );
 };
diff --git a/src/components/Breadcrumb/Breadcrumb.tsx b/src/components/Breadcrumb/Breadcrumb.tsx
index 20e30a7a..a5804a95 100644
--- a/src/components/Breadcrumb/Breadcrumb.tsx
+++ b/src/components/Breadcrumb/Breadcrumb.tsx
@@ -24,6 +24,7 @@ const pathToLabelKey: { [path: string]: string } = {
   "/settings/user": "nav.settings.user",
   "/settings/clientMonitor": "nav.settings.clientMonitor",
   "/settings/items": "nav.settings.items",
+  "/settings/itemDefaultShelfLife": "nav.settings.itemDefaultShelfLife",
   "/settings/warehouse": "nav.settings.warehouse",
   "/settings/qcCategory": "nav.settings.qcCategory",
   "/settings/bomWeighting": "nav.settings.bomWeighting",
diff --git a/src/components/ItemDefaultShelfLifeSettings/ItemDefaultShelfLifeSettings.tsx b/src/components/ItemDefaultShelfLifeSettings/ItemDefaultShelfLifeSettings.tsx
new file mode 100644
index 00000000..763a54ad
--- /dev/null
+++ b/src/components/ItemDefaultShelfLifeSettings/ItemDefaultShelfLifeSettings.tsx
@@ -0,0 +1,473 @@
+"use client";
+
+import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
+import Add from "@mui/icons-material/Add";
+import DeleteOutline from "@mui/icons-material/DeleteOutline";
+import EditOutlined from "@mui/icons-material/EditOutlined";
+import {
+  Alert,
+  Box,
+  Button,
+  Checkbox,
+  Chip,
+  CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
+  FormControlLabel,
+  FormHelperText,
+  IconButton,
+  Stack,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TablePagination,
+  TableRow,
+  TextField,
+  Typography,
+} from "@mui/material";
+import {
+  createItemDefaultShelfLife,
+  deleteItemDefaultShelfLife,
+  fetchItemDefaultShelfLives,
+  updateItemDefaultShelfLife,
+  type ItemDefaultShelfLifeInput,
+  type ItemDefaultShelfLifeRow,
+} from "@/app/api/settings/itemDefaultShelfLife/client";
+
+type FormState = {
+  itemCode: string;
+  defaultDays: string;
+  minus18Days: string;
+  useMinus18: boolean;
+  openedDays: string;
+  storageC: string;
+  remarks: string;
+};
+
+const emptyForm = (): FormState => ({
+  itemCode: "",
+  defaultDays: "",
+  minus18Days: "",
+  useMinus18: false,
+  openedDays: "",
+  storageC: "",
+  remarks: "",
+});
+
+function parseOptionalDays(raw: string): number | null | "invalid" {
+  const t = raw.trim();
+  if (!t) return null;
+  if (!/^\d+$/.test(t)) return "invalid";
+  return Number(t);
+}
+
+function daysFromForm(form: FormState): { defaultDays: number | null; minus18Days: number | null } | "invalid" {
+  const defaultDays = parseOptionalDays(form.defaultDays);
+  const minus18Days = parseOptionalDays(form.minus18Days);
+  if (defaultDays === "invalid" || minus18Days === "invalid") return "invalid";
+  return { defaultDays, minus18Days };
+}
+
+function effectiveDays(form: FormState): number | null {
+  const parsed = daysFromForm(form);
+  if (parsed === "invalid") return null;
+  const chosen = form.useMinus18 ? parsed.minus18Days : parsed.defaultDays;
+  return chosen != null && chosen > 0 ? chosen : null;
+}
+
+function expiryPreview(days: number | null): string | null {
+  if (days == null) return null;
+  const d = new Date();
+  d.setHours(0, 0, 0, 0);
+  d.setDate(d.getDate() + days);
+  const y = d.getFullYear();
+  const m = String(d.getMonth() + 1).padStart(2, "0");
+  const day = String(d.getDate()).padStart(2, "0");
+  return `${y}-${m}-${day}`;
+}
+
+function toForm(row: ItemDefaultShelfLifeRow): FormState {
+  return {
+    itemCode: row.itemCode ?? "",
+    defaultDays: row.defaultDays != null ? String(row.defaultDays) : "",
+    minus18Days: row.minus18Days != null ? String(row.minus18Days) : "",
+    useMinus18: row.useMinus18 === true,
+    openedDays: row.openedDays != null ? String(row.openedDays) : "",
+    storageC: row.storageC ?? "",
+    remarks: row.remarks ?? "",
+  };
+}
+
+const ItemDefaultShelfLifeSettings: React.FC = () => {
+  const { t } = useTranslation("itemDefaultShelfLife");
+  const saveInFlightRef = useRef(false);
+  const deleteInFlightRef = useRef(false);
+
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [success, setSuccess] = useState<string | null>(null);
+  const [rows, setRows] = useState<ItemDefaultShelfLifeRow[]>([]);
+  const [query, setQuery] = useState("");
+  const [page, setPage] = useState(0);
+  const [rowsPerPage, setRowsPerPage] = useState(25);
+
+  const [dialogOpen, setDialogOpen] = useState(false);
+  const [editing, setEditing] = useState<ItemDefaultShelfLifeRow | null>(null);
+  const [form, setForm] = useState<FormState>(emptyForm);
+  const [formError, setFormError] = useState<string | null>(null);
+  const [saving, setSaving] = useState(false);
+
+  const [deleteTarget, setDeleteTarget] = useState<ItemDefaultShelfLifeRow | null>(null);
+  const [deleting, setDeleting] = useState(false);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      setRows(await fetchItemDefaultShelfLives());
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : String(e));
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  const filtered = useMemo(() => {
+    const needle = query.trim().toLowerCase();
+    if (!needle) return rows;
+    return rows.filter((r) =>
+      [r.itemCode, r.itemName, r.remarks].some((v) => v?.toLowerCase().includes(needle)),
+    );
+  }, [query, rows]);
+
+  useEffect(() => {
+    setPage(0);
+  }, [query]);
+
+  const paged = useMemo(() => {
+    const start = page * rowsPerPage;
+    return filtered.slice(start, start + rowsPerPage);
+  }, [filtered, page, rowsPerPage]);
+
+  const openCreate = () => {
+    setEditing(null);
+    setForm(emptyForm());
+    setFormError(null);
+    setDialogOpen(true);
+  };
+
+  const openEdit = (row: ItemDefaultShelfLifeRow) => {
+    setEditing(row);
+    setForm(toForm(row));
+    setFormError(null);
+    setDialogOpen(true);
+  };
+
+  const closeDialog = () => {
+    if (saving) return;
+    setDialogOpen(false);
+  };
+
+  const onSave = async () => {
+    if (saveInFlightRef.current) return;
+    const code = form.itemCode.trim();
+    if (!code) {
+      setFormError(t("Item code required"));
+      return;
+    }
+    const parsed = daysFromForm(form);
+    const openedDays = parseOptionalDays(form.openedDays);
+    if (parsed === "invalid" || openedDays === "invalid") {
+      setFormError(t("Days invalid"));
+      return;
+    }
+    const payload: ItemDefaultShelfLifeInput = {
+      itemCode: code,
+      defaultDays: parsed.defaultDays,
+      minus18Days: parsed.minus18Days,
+      useMinus18: form.useMinus18,
+      openedDays,
+      storageC: form.storageC.trim() || null,
+      remarks: form.remarks.trim() || null,
+    };
+    saveInFlightRef.current = true;
+    setSaving(true);
+    setFormError(null);
+    setError(null);
+    setSuccess(null);
+    try {
+      if (editing) {
+        const updated = await updateItemDefaultShelfLife(editing.id, payload);
+        setRows((prev) =>
+          prev
+            .map((r) => (r.id === updated.id ? updated : r))
+            .sort((a, b) => a.itemCode.localeCompare(b.itemCode)),
+        );
+      } else {
+        const created = await createItemDefaultShelfLife(payload);
+        setRows((prev) =>
+          [...prev.filter((r) => r.id !== created.id), created].sort((a, b) =>
+            a.itemCode.localeCompare(b.itemCode),
+          ),
+        );
+      }
+      setSuccess(t("Saved"));
+      setDialogOpen(false);
+    } catch (e: unknown) {
+      setFormError(e instanceof Error ? e.message : String(e));
+    } finally {
+      setSaving(false);
+      saveInFlightRef.current = false;
+    }
+  };
+
+  const onDelete = async () => {
+    if (!deleteTarget || deleteInFlightRef.current) return;
+    deleteInFlightRef.current = true;
+    setDeleting(true);
+    setError(null);
+    setSuccess(null);
+    try {
+      const next = await deleteItemDefaultShelfLife(deleteTarget.id);
+      setRows(next);
+      setSuccess(t("Deleted"));
+      setDeleteTarget(null);
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : String(e));
+    } finally {
+      setDeleting(false);
+      deleteInFlightRef.current = false;
+    }
+  };
+
+  const previewDays = effectiveDays(form);
+  const previewDate = expiryPreview(previewDays);
+  const from = filtered.length === 0 ? 0 : page * rowsPerPage + 1;
+  const to = Math.min(filtered.length, (page + 1) * rowsPerPage);
+
+  return (
+    <Stack spacing={2}>
+      <Typography variant="body2" color="text.secondary">
+        {t("Intro")}
+      </Typography>
+      {error && <Alert severity="error">{error}</Alert>}
+      {success && (
+        <Alert severity="success" onClose={() => setSuccess(null)}>
+          {success}
+        </Alert>
+      )}
+      <Stack direction="row" spacing={1} flexWrap="wrap" useFlexGap alignItems="center">
+        <TextField
+          size="small"
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          placeholder={t("Search placeholder")}
+          sx={{ minWidth: 260, flex: 1 }}
+        />
+        <Button variant="contained" startIcon={<Add />} onClick={openCreate}>
+          {t("Add")}
+        </Button>
+      </Stack>
+      {loading ? (
+        <Box display="flex" justifyContent="center" py={4}>
+          <CircularProgress />
+        </Box>
+      ) : (
+        <>
+          <TableContainer sx={{ maxHeight: 640 }}>
+            <Table size="small" stickyHeader>
+              <TableHead>
+                <TableRow>
+                  <TableCell>{t("Col itemCode")}</TableCell>
+                  <TableCell>{t("Col itemName")}</TableCell>
+                  <TableCell align="right">{t("Col defaultDays")}</TableCell>
+                  <TableCell align="right">{t("Col minus18Days")}</TableCell>
+                  <TableCell>{t("Col useMinus18")}</TableCell>
+                  <TableCell align="right">{t("Col effectiveDays")}</TableCell>
+                  <TableCell align="right">{t("Col openedDays")}</TableCell>
+                  <TableCell>{t("Col storageC")}</TableCell>
+                  <TableCell>{t("Col remarks")}</TableCell>
+                  <TableCell align="right">{t("Col actions")}</TableCell>
+                </TableRow>
+              </TableHead>
+              <TableBody>
+                {paged.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={10}>
+                      <Typography color="text.secondary">
+                        {rows.length === 0 ? t("Empty") : t("No match")}
+                      </Typography>
+                    </TableCell>
+                  </TableRow>
+                ) : (
+                  paged.map((row) => (
+                    <TableRow key={row.id} hover>
+                      <TableCell>{row.itemCode}</TableCell>
+                      <TableCell>{row.itemName || "—"}</TableCell>
+                      <TableCell align="right">{row.defaultDays ?? "—"}</TableCell>
+                      <TableCell align="right">{row.minus18Days ?? "—"}</TableCell>
+                      <TableCell>
+                        <Chip
+                          size="small"
+                          label={row.useMinus18 ? t("Yes") : t("No")}
+                          color={row.useMinus18 ? "warning" : "default"}
+                          variant={row.useMinus18 ? "filled" : "outlined"}
+                        />
+                      </TableCell>
+                      <TableCell align="right">{row.effectiveDays ?? "—"}</TableCell>
+                      <TableCell align="right">{row.openedDays ?? "—"}</TableCell>
+                      <TableCell>{row.storageC || "—"}</TableCell>
+                      <TableCell>{row.remarks || "—"}</TableCell>
+                      <TableCell align="right">
+                        <IconButton size="small" aria-label={t("Edit")} onClick={() => openEdit(row)}>
+                          <EditOutlined fontSize="small" />
+                        </IconButton>
+                        <IconButton
+                          size="small"
+                          aria-label={t("Delete")}
+                          onClick={() => setDeleteTarget(row)}
+                        >
+                          <DeleteOutline fontSize="small" />
+                        </IconButton>
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </TableContainer>
+          <Stack direction="row" alignItems="center" justifyContent="space-between" flexWrap="wrap">
+            <Typography variant="body2" color="text.secondary">
+              {t("Showing", { from, to, total: filtered.length })}
+            </Typography>
+            <TablePagination
+              component="div"
+              count={filtered.length}
+              page={page}
+              onPageChange={(_, next) => setPage(next)}
+              rowsPerPage={rowsPerPage}
+              onRowsPerPageChange={(e) => {
+                setRowsPerPage(parseInt(e.target.value, 10));
+                setPage(0);
+              }}
+              rowsPerPageOptions={[25, 50, 100]}
+            />
+          </Stack>
+        </>
+      )}
+
+      <Dialog open={dialogOpen} onClose={closeDialog} fullWidth maxWidth="sm">
+        <DialogTitle>{editing ? t("Edit title") : t("Add title")}</DialogTitle>
+        <DialogContent>
+          <Stack spacing={2} sx={{ mt: 1 }}>
+            {formError && <Alert severity="error">{formError}</Alert>}
+            <TextField
+              required
+              label={t("Col itemCode")}
+              value={form.itemCode}
+              onChange={(e) => setForm((s) => ({ ...s, itemCode: e.target.value }))}
+              disabled={saving}
+              autoFocus={!editing}
+            />
+            <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
+              <TextField
+                label={t("Col defaultDays")}
+                value={form.defaultDays}
+                onChange={(e) => setForm((s) => ({ ...s, defaultDays: e.target.value }))}
+                disabled={saving}
+                fullWidth
+              />
+              <TextField
+                label={t("Col minus18Days")}
+                value={form.minus18Days}
+                onChange={(e) => setForm((s) => ({ ...s, minus18Days: e.target.value }))}
+                disabled={saving}
+                fullWidth
+              />
+            </Stack>
+            <Box>
+              <FormControlLabel
+                control={
+                  <Checkbox
+                    checked={form.useMinus18}
+                    onChange={(e) => setForm((s) => ({ ...s, useMinus18: e.target.checked }))}
+                    disabled={saving}
+                  />
+                }
+                label={t("Use minus18")}
+              />
+              <FormHelperText>{t("Use minus18 help")}</FormHelperText>
+            </Box>
+            <Typography variant="body2" color={previewDate ? "text.secondary" : "warning.main"}>
+              {previewDate
+                ? t("Expiry preview", { date: previewDate })
+                : t("Expiry preview none")}
+            </Typography>
+            <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
+              <TextField
+                label={t("Col openedDays")}
+                value={form.openedDays}
+                onChange={(e) => setForm((s) => ({ ...s, openedDays: e.target.value }))}
+                disabled={saving}
+                fullWidth
+              />
+              <TextField
+                label={t("Col storageC")}
+                value={form.storageC}
+                onChange={(e) => setForm((s) => ({ ...s, storageC: e.target.value }))}
+                disabled={saving}
+                inputProps={{ maxLength: 20 }}
+                fullWidth
+              />
+            </Stack>
+            <TextField
+              label={t("Col remarks")}
+              value={form.remarks}
+              onChange={(e) => setForm((s) => ({ ...s, remarks: e.target.value }))}
+              disabled={saving}
+              inputProps={{ maxLength: 255 }}
+              multiline
+              minRows={2}
+            />
+          </Stack>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={closeDialog} disabled={saving}>
+            {t("Cancel")}
+          </Button>
+          <Button variant="contained" onClick={onSave} disabled={saving}>
+            {saving ? t("Saving") : t("Save")}
+          </Button>
+        </DialogActions>
+      </Dialog>
+
+      <Dialog open={!!deleteTarget} onClose={() => !deleting && setDeleteTarget(null)}>
+        <DialogTitle>{t("Delete title")}</DialogTitle>
+        <DialogContent>
+          <Typography>
+            {t("Delete confirm", { itemCode: deleteTarget?.itemCode ?? "" })}
+          </Typography>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={() => setDeleteTarget(null)} disabled={deleting}>
+            {t("Cancel")}
+          </Button>
+          <Button color="error" variant="contained" onClick={onDelete} disabled={deleting}>
+            {t("Delete")}
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </Stack>
+  );
+};
+
+export default ItemDefaultShelfLifeSettings;
diff --git a/src/components/NavigationContent/NavigationContent.tsx b/src/components/NavigationContent/NavigationContent.tsx
index edafb469..957cb95b 100644
--- a/src/components/NavigationContent/NavigationContent.tsx
+++ b/src/components/NavigationContent/NavigationContent.tsx
@@ -40,6 +40,7 @@ import UploadFile from "@mui/icons-material/UploadFile";
 import Sync from "@mui/icons-material/Sync";
 import Layers from "@mui/icons-material/Layers";
 import Devices from "@mui/icons-material/Devices";
+import EventAvailable from "@mui/icons-material/EventAvailable";
 import { useTranslation } from "react-i18next";
 import { usePathname } from "next/navigation";
 import Link from "next/link";
@@ -325,6 +326,12 @@ const NavigationContent: React.FC = () => {
           labelKey: "nav.settings.items",
           path: "/settings/items",
         },
+        {
+          id: "nav.settings.itemDefaultShelfLife",
+          icon: <EventAvailable />,
+          labelKey: "nav.settings.itemDefaultShelfLife",
+          path: "/settings/itemDefaultShelfLife",
+        },
         {
           id: "nav.settings.equipment",
           icon: <Build />,
diff --git a/src/i18n/en/itemDefaultShelfLife.json b/src/i18n/en/itemDefaultShelfLife.json
new file mode 100644
index 00000000..7f90cf3c
--- /dev/null
+++ b/src/i18n/en/itemDefaultShelfLife.json
@@ -0,0 +1,38 @@
+{
+  "title": "Item default shelf life",
+  "Intro": "Manage default shelf-life days by item code for bag / OnPack expiry print. When “Print uses -18” is on, expiry uses -18 days; otherwise chilled days.",
+  "Search placeholder": "Search item code, name, or remarks",
+  "Add": "Add",
+  "Edit": "Edit",
+  "Delete": "Delete",
+  "Save": "Save",
+  "Saving": "Saving",
+  "Cancel": "Cancel",
+  "Saved": "Saved",
+  "Deleted": "Deleted",
+  "Add title": "Add shelf life",
+  "Edit title": "Edit shelf life",
+  "Delete title": "Delete shelf life",
+  "Delete confirm": "Delete the default shelf life for {{itemCode}}? Bag / OnPack print will no longer show an expiry for this item.",
+  "Col itemCode": "Item code",
+  "Col itemName": "Item name",
+  "Col defaultDays": "Chilled days",
+  "Col minus18Days": "-18 days",
+  "Col useMinus18": "Print uses -18",
+  "Col effectiveDays": "Print days",
+  "Col openedDays": "Opened days",
+  "Col storageC": "Storage °C",
+  "Col remarks": "Remarks",
+  "Col actions": "Actions",
+  "Empty": "No rows yet. Use Add to create a shelf-life record.",
+  "No match": "No rows match the search.",
+  "Showing": "Showing {{from}}–{{to}} of {{total}}",
+  "Item code required": "Item code is required.",
+  "Days invalid": "Days must be 0 or a positive integer.",
+  "Use minus18": "Print uses -18 days",
+  "Use minus18 help": "When checked, bag / OnPack expiry uses -18 days; otherwise chilled days.",
+  "Expiry preview": "Expiry if printed today: {{date}}",
+  "Expiry preview none": "Expiry if printed today: cannot compute (chosen days missing or not greater than 0)",
+  "Yes": "Yes",
+  "No": "No"
+}
diff --git a/src/i18n/en/navigation.json b/src/i18n/en/navigation.json
index 7d852f0e..cb72caca 100644
--- a/src/i18n/en/navigation.json
+++ b/src/i18n/en/navigation.json
@@ -36,6 +36,7 @@
   "nav.settings.user": "User",
   "nav.settings.clientMonitor": "Device Connection Monitor",
   "nav.settings.items": "Items",
+  "nav.settings.itemDefaultShelfLife": "Item default shelf life",
   "nav.settings.equipment": "Equipment",
   "nav.settings.warehouse": "Warehouse",
   "nav.settings.printer": "Printer",
diff --git a/src/i18n/zh/itemDefaultShelfLife.json b/src/i18n/zh/itemDefaultShelfLife.json
new file mode 100644
index 00000000..e54c8923
--- /dev/null
+++ b/src/i18n/zh/itemDefaultShelfLife.json
@@ -0,0 +1,38 @@
+{
+  "title": "物品預設保質期",
+  "Intro": "設定各貨品編號的預設保質期，供打袋機／OnPack 列印到期日使用。勾選「列印使用 -18」時，到期日會用 -18 天數，否則用冷藏天數。",
+  "Search placeholder": "搜尋貨品編號、名稱或備註",
+  "Add": "新增",
+  "Edit": "編輯",
+  "Delete": "刪除",
+  "Save": "儲存",
+  "Saving": "儲存中",
+  "Cancel": "取消",
+  "Saved": "已儲存",
+  "Deleted": "已刪除",
+  "Add title": "新增保質期",
+  "Edit title": "編輯保質期",
+  "Delete title": "刪除保質期",
+  "Delete confirm": "確定刪除 {{itemCode}} 的預設保質期？列印將不再帶出此貨品的到期日。",
+  "Col itemCode": "貨品編號",
+  "Col itemName": "物品名稱",
+  "Col defaultDays": "冷藏天數",
+  "Col minus18Days": "-18 天數",
+  "Col useMinus18": "列印使用 -18",
+  "Col effectiveDays": "列印天數",
+  "Col openedDays": "開封後天數",
+  "Col storageC": "儲存溫度",
+  "Col remarks": "備註",
+  "Col actions": "操作",
+  "Empty": "尚無資料。請按「新增」加入貨品保質期。",
+  "No match": "沒有符合搜尋條件的資料。",
+  "Showing": "顯示 {{from}}–{{to}}／共 {{total}} 筆",
+  "Item code required": "請輸入貨品編號。",
+  "Days invalid": "天數必須為 0 或正整數。",
+  "Use minus18": "列印使用 -18 天數",
+  "Use minus18 help": "勾選後，打袋機／OnPack 到期日使用 -18 天數；未勾選則使用冷藏天數。",
+  "Expiry preview": "今日列印到期日：{{date}}",
+  "Expiry preview none": "今日列印到期日：無法計算（所選天數未填或不大於 0）",
+  "Yes": "是",
+  "No": "否"
+}
diff --git a/src/i18n/zh/navigation.json b/src/i18n/zh/navigation.json
index cd01b472..afbc1d79 100644
--- a/src/i18n/zh/navigation.json
+++ b/src/i18n/zh/navigation.json
@@ -79,6 +79,7 @@
   "nav.settings.importExcel": "Excel 匯入",
   "nav.settings.importTesting": "匯入測試",
   "nav.settings.items": "物品",
+  "nav.settings.itemDefaultShelfLife": "物品預設保質期",
   "nav.settings.masterDataIssues": "BOM / 物料單位問題",
   "nav.settings.priceInquiry": "價格查詢",
   "nav.settings.printer": "列印機",