diff --git a/apps/admin-ui/app/(drawer)/dashboard/customize-app/all-items-order.tsx b/apps/admin-ui/app/(drawer)/dashboard/customize-app/all-items-order.tsx
index aad9ae1..9930cc0 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/customize-app/all-items-order.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/customize-app/all-items-order.tsx
@@ -1,4 +1,5 @@
 import React, { useState, useEffect, useCallback } from "react";
+import type { StoreProductCard } from '@packages/shared'
 import {
   View,
   Alert,
@@ -27,20 +28,12 @@ const { width: screenWidth } = Dimensions.get("window");
 const itemWidth = screenWidth - 48; // 24px padding each side
 const itemHeight = 80;
 
-interface Product {
-  id: number;
-  name: string;
-  images: string[];
-  isOutOfStock: boolean;
-}
+// Reorder row — anchored to the shared store-card core
+type Product = Pick<StoreProductCard, 'id' | 'name' | 'images' | 'isOutOfStock'>
 
-interface ProductItemProps {
-  item: Product;
-  drag: () => void;
-  isActive: boolean;
-}
+import type { DragOrderItemProps } from '@/types/drag-order-item';
 
-const ProductItem: React.FC<ProductItemProps> = ({
+const ProductItem: React.FC<DragOrderItemProps<Product>> = ({
   item,
   drag,
   isActive,
diff --git a/apps/admin-ui/app/(drawer)/dashboard/customize-app/popular-items.tsx b/apps/admin-ui/app/(drawer)/dashboard/customize-app/popular-items.tsx
index 15137d1..f0d8830 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/customize-app/popular-items.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/customize-app/popular-items.tsx
@@ -24,26 +24,22 @@ import { useRouter } from "expo-router";
 import { trpc } from "../../../../src/trpc-client";
 import MaterialIcons from "@expo/vector-icons/MaterialIcons";
 import { useQueryClient } from "@tanstack/react-query";
+import type { StoreProductCard } from '@packages/shared';
+import type { DragOrderItemProps } from '@/types/drag-order-item';
 
-interface PopularProduct {
-  id: number;
-  name: string;
-  shortDescription: string | null;
+// Popular-items row = shared store card core with numeric (form) prices
+type PopularProduct = Omit<
+  StoreProductCard,
+  'price' | 'marketPrice' | 'unitNotation' | 'images'
+> & {
   price: number;
   marketPrice: number | null;
-  unit: string;
-  incrementStep: number;
-  productQuantity: number;
-  storeId: number | null;
-  isOutOfStock: boolean;
-  nextDeliveryDate: string | null;
   images: string[];
-}
+  storeId: number | null;
+  nextDeliveryDate: string | null;
+};
 
-interface ProductItemProps {
-  item: PopularProduct;
-  drag: () => void;
-  isActive: boolean;
+interface ProductItemProps extends DragOrderItemProps<PopularProduct> {
   onDelete: (id: number) => void;
 }
 
diff --git a/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/edit/[id].tsx b/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/edit/[id].tsx
index 4e86bbc..cdbc9e0 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/edit/[id].tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/edit/[id].tsx
@@ -6,19 +6,20 @@ import { useRouter, useLocalSearchParams } from 'expo-router';
 import { FormikHelpers } from 'formik';
 import BannerForm, { BannerFormData } from '@/components/BannerForm';
 import { trpc } from '@/src/trpc-client';
+import type { Banner as SharedBanner } from '@packages/shared';
 
-interface Banner {
-  id: number;
-  name: string;
-  imageUrl: string;
+// Form/hardened view of the shared banner (string dates, non-null editable fields)
+type Banner = Omit<
+  SharedBanner,
+  'description' | 'skuIds' | 'redirectUrl' | 'serialNum' | 'createdAt' | 'lastUpdated'
+> & {
   description?: string;
   skuIds?: number[];
   redirectUrl?: string;
   serialNum: number;
-  isActive: boolean;
   createdAt: string;
   lastUpdated: string;
-}
+};
 
 export default function EditBanner() {
   const router = useRouter();
diff --git a/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/index.tsx b/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/index.tsx
index dbc31d9..6d68a57 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/index.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/dashboard-banners/index.tsx
@@ -4,19 +4,13 @@ import { AppContainer, MyText, tw, MyTouchableOpacity } from 'common-ui';
 import { trpc } from '../../../../src/trpc-client';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
 import { useRouter } from 'expo-router';
+import type { Banner as SharedBanner } from '@packages/shared';
 
-interface Banner {
-  id: number;
-  name: string;
-  imageUrl: string;
-  description: string | null;
-  skuIds: number[] | null;
-  redirectUrl: string | null;
-  serialNum: number | null;
-  isActive: boolean;
+// Serialized banner row (API JSON carries string dates) anchored to the shared shape
+type Banner = Omit<SharedBanner, 'createdAt' | 'lastUpdated'> & {
   createdAt: string;
   lastUpdated: string;
-}
+};
 
 export default function DashboardBanners() {
   const router = useRouter();
diff --git a/apps/admin-ui/app/(drawer)/dashboard/manage-orders/orders/index.tsx b/apps/admin-ui/app/(drawer)/dashboard/manage-orders/orders/index.tsx
index 1374b0f..b733918 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/manage-orders/orders/index.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/manage-orders/orders/index.tsx
@@ -9,6 +9,7 @@ import { Entypo } from '@expo/vector-icons';
 import CancelOrderDialog from '@/components/CancelOrderDialog';
 import { OrderOptionsMenu } from '@/components/OrderOptionsMenu';
 import * as Location from 'expo-location';
+import type { AdminOrderListItem, AdminOrderListItemProduct } from '@packages/shared';
 
 const AdminNotesForm = ({ orderId, existingNotes, onClose, refetch }: { orderId: string; existingNotes?: string | null; onClose: () => void; refetch: () => void }) => {
   const [notesText, setNotesText] = useState(existingNotes || '');
@@ -51,43 +52,32 @@ const AdminNotesForm = ({ orderId, existingNotes, onClose, refetch }: { orderId:
 };
 
 
-interface OrderType {
-  id: number;
-  orderId: string;
-  readableId: number;
+// Order list row — derived from shared AdminOrderListItem (serialized dates,
+// coupon display fields, optional flags)
+type OrderItemRow = Omit<
+  AdminOrderListItemProduct,
+  'id' | 'skuName' | 'features' | 'isPackaged' | 'isPackageVerified'
+> & {
+  id?: number;
+  isPackaged?: boolean;
+  isPackageVerified?: boolean;
+};
+
+type OrderType = Omit<
+  AdminOrderListItem,
+  'customerName' | 'customerMobile' | 'items' | 'createdAt' | 'adminNotes' | 'userNotes' | 'userNegativityScore'
+> & {
   customerName: string | null;
   customerMobile?: string | null;
-  address: string;
-  addressId: number;
-  latitude: number | null;
-  longitude: number | null;
-  totalAmount: number;
-  deliveryCharge: number;
-  items: {
-    id?: number;
-    name: string;
-    quantity: number;
-    price: number;
-    amount: number;
-    unit: string;
-    isPackaged?: boolean;
-    isPackageVerified?: boolean;
-    productSize: number;
-  }[];
+  items: OrderItemRow[];
   createdAt: string;
-  deliveryTime: string | null;
-  status: 'pending' | 'delivered' | 'cancelled';
-  isPackaged: boolean;
-  isDelivered: boolean;
-  isCod: boolean;
-  isFlashDelivery: boolean;
-  couponCode?: string;
-  couponDescription?: string;
-  discountAmount?: number;
   adminNotes?: string | null;
   userNotes?: string | null;
   userNegativityScore?: number;
-}
+  couponCode?: string;
+  couponDescription?: string;
+  discountAmount?: number;
+};
 
 const OrderItem = ({ order, refetch }: { order: OrderType; refetch: () => void }) => {
   const id = order.orderId;
diff --git a/apps/admin-ui/app/(drawer)/dashboard/product-tags/edit/index.tsx b/apps/admin-ui/app/(drawer)/dashboard/product-tags/edit/index.tsx
index 28d7d63..8750046 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/product-tags/edit/index.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/product-tags/edit/index.tsx
@@ -3,17 +3,12 @@ import { View, Alert } from 'react-native';
 import { useRouter, useLocalSearchParams } from 'expo-router';
 import { AppContainer, MyText, tw, type ImageUploaderNeoItem } from 'common-ui';
 import TagForm from '@/src/components/TagForm';
+import type { TagFormData as BaseTagFormData } from '@/src/components/TagForm';
 import { trpc } from '@/src/trpc-client';
 import { useUploadToObjectStorage } from '@/hooks/useUploadToObjectStore';
 
-interface TagFormData {
-  tagName: string;
-  tagDescription: string;
-  isDashboardTag: boolean;
-  relatedStores: number[];
-  productIds: number[];
-  existingImageUrl?: string;
-}
+// Edit screen adds the current image to the canonical TagForm data
+type TagFormData = BaseTagFormData & { existingImageUrl?: string };
 
 export default function EditTag() {
   const router = useRouter();
diff --git a/apps/admin-ui/app/(drawer)/dashboard/product-tags/index.tsx b/apps/admin-ui/app/(drawer)/dashboard/product-tags/index.tsx
index a1eae54..1991455 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/product-tags/index.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/product-tags/index.tsx
@@ -1,4 +1,5 @@
 import React, { useState } from 'react';
+import type { ProductTagCore } from '@packages/shared'
 import { View, TouchableOpacity, Alert, RefreshControl } from 'react-native';
 import { Image } from 'expo-image';
 import { useRouter } from 'expo-router';
@@ -7,13 +8,12 @@ import { tw, MyText, useManualRefresh, useMarkDataFetchers, MyFlatList } from 'c
 import { TagMenu } from '@/src/components/TagMenu';
 import { trpc } from '@/src/trpc-client';
 
-interface TagItemData {
+// Tag list row — anchored to the shared tag core (relatedStores now typed)
+interface TagItemData extends ProductTagCore {
   id: number;
-  tagName: string;
   tagDescription: string | null;
   imageUrl: string | null;
   isDashboardTag: boolean;
-  relatedStores?: unknown;
   createdAt: string | Date;
 }
 
diff --git a/apps/admin-ui/app/(drawer)/dashboard/product-tags/order.tsx b/apps/admin-ui/app/(drawer)/dashboard/product-tags/order.tsx
index 06105a0..8b82d5c 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/product-tags/order.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/product-tags/order.tsx
@@ -21,6 +21,7 @@ import { useRouter } from 'expo-router';
 import { trpc } from '../../../../src/trpc-client';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
 import { useQueryClient } from '@tanstack/react-query';
+import type { DragOrderItemProps } from '@/types/drag-order-item';
 
 const { width: screenWidth } = Dimensions.get('window');
 const itemWidth = screenWidth - 48;
@@ -32,13 +33,7 @@ interface Tag {
   imageUrl: string | null;
 }
 
-interface TagItemProps {
-  item: Tag;
-  drag: () => void;
-  isActive: boolean;
-}
-
-const TagItem: React.FC<TagItemProps> = ({ item, drag, isActive }) => {
+const TagItem: React.FC<DragOrderItemProps<Tag>> = ({ item, drag, isActive }) => {
   return (
     <ScaleDecorator>
       <TouchableOpacity
diff --git a/apps/admin-ui/app/(drawer)/dashboard/products/add.tsx b/apps/admin-ui/app/(drawer)/dashboard/products/add.tsx
index d1b3979..e227458 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/products/add.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/products/add.tsx
@@ -15,8 +15,8 @@ export default function AddProduct() {
   const handleSubmit = async (values: any, variantImages: ImageUploaderNeoPayload[][], _deletedImageKeys?: string[]) => {
     try {
       for (const variant of values.variants) {
-        const price = parseFloat(variant.price)
-        if (isNaN(price) || price <= 0) {
+        const price = variant.price
+        if (price == null || price <= 0) {
           Alert.alert('Error', 'Please enter a valid price for every variant')
           return
         }
@@ -24,15 +24,15 @@ export default function AddProduct() {
 
       const seenSignatures = new Set<string>()
       for (const variant of values.variants) {
-        const attributes = variant.attributes || []
-        const hasQuantity = attributes.some(
+        const features = variant.features || []
+        const hasQuantity = features.some(
           (a: any) => (a.featureName ?? '').trim().toLowerCase() === 'quantity'
         )
         if (!hasQuantity) {
           Alert.alert('Error', 'Every SKU must have a quantity feature')
           return
         }
-        const signature = attributes
+        const signature = features
           .map((a: any) => `${(a.featureName ?? '').trim().toLowerCase()}::${a.featureValue.trim().toLowerCase()}`)
           .sort()
           .join('|')
@@ -68,21 +68,21 @@ export default function AddProduct() {
 
         return {
           name: variant.name || null,
-          price: parseFloat(variant.price),
-          marketPrice: variant.marketPrice ? parseFloat(variant.marketPrice) : undefined,
+          price: variant.price as number,
+          marketPrice: variant.marketPrice ?? undefined,
           images: variantUrls,
           isFlashAvailable: variant.isFlashAvailable || false,
-          flashPrice: variant.flashPrice ? parseFloat(variant.flashPrice) : undefined,
+          flashPrice: variant.flashPrice ?? undefined,
           isOffer: variant.isOffer || false,
           isComboOnly: variant.isComboOnly || false,
           isDeleted: variant.isDeleted || false,
           isSuspended: variant.isSuspended || false,
-          features: variant.attributes.map((attr: any) => ({
+          features: variant.features.map((attr: any) => ({
             featureName: attr.featureName,
             featureValue: attr.featureValue,
           })),
           comboItems: (variant.comboItems || []).map((ci: any) => ({
-            skuId: typeof ci.skuId === 'string' ? parseInt(ci.skuId) : ci.skuId,
+            skuId: ci.skuId,
           })),
         }
       })
@@ -114,16 +114,16 @@ export default function AddProduct() {
       {
         id: undefined as number | undefined,
         name: '',
-        price: '',
-        marketPrice: '',
+        price: undefined,
+        marketPrice: null,
         isFlashAvailable: false,
-        flashPrice: '',
+        flashPrice: null,
         isOffer: false,
         isComboOnly: false,
         isDeleted: false,
         isSuspended: false,
-        attributes: [{ featureName: 'quantity', featureValue: '' }],
-        comboItems: [] as { skuId: number | string }[],
+        features: [{ featureName: 'quantity', featureValue: '' }],
+        comboItems: [],
       },
     ],
   }
diff --git a/apps/admin-ui/app/(drawer)/dashboard/products/edit.tsx b/apps/admin-ui/app/(drawer)/dashboard/products/edit.tsx
index 27011b7..3a19620 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/products/edit.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/products/edit.tsx
@@ -45,20 +45,20 @@ export default function EditProduct() {
       variants: (productData.skus || []).map((sku) => ({
         id: sku.id,
         name: sku.name || '',
-        price: sku.price || '',
-        marketPrice: sku.marketPrice || '',
+        price: sku.price ? parseFloat(sku.price) : undefined,
+        marketPrice: sku.marketPrice ? parseFloat(sku.marketPrice) : null,
         isFlashAvailable: sku.isFlashAvailable || false,
-        flashPrice: sku.flashPrice || '',
+        flashPrice: sku.flashPrice ? parseFloat(sku.flashPrice) : null,
         isOffer: sku.isOffer || false,
         isComboOnly: sku.isComboOnly || false,
         isDeleted: sku.isDeleted || false,
         isSuspended: sku.isSuspended || false,
-        attributes: (sku.features || []).map((f) => ({
+        features: (sku.features || []).map((f) => ({
           featureName: f.featureName,
           featureValue: f.featureValue,
         })),
         comboItems: (sku.comboItems || []).map((ci: any) => ({
-          skuId: ci.skuId.toString(),
+          skuId: ci.skuId,
         })),
       })),
     }
@@ -81,8 +81,8 @@ export default function EditProduct() {
   const handleSubmit = async (values: any, variantImages: ImageUploaderNeoPayload[][], deletedImageKeys: string[]) => {
     try {
       for (const variant of values.variants) {
-        const price = parseFloat(variant.price)
-        if (isNaN(price) || price <= 0) {
+        const price = variant.price
+        if (price == null || price <= 0) {
           Alert.alert('Error', 'Please enter a valid price for every variant')
           return
         }
@@ -90,15 +90,15 @@ export default function EditProduct() {
 
       const seenSignatures = new Set<string>()
       for (const variant of values.variants) {
-        const attributes = variant.attributes || []
-        const hasQuantity = attributes.some(
+        const features = variant.features || []
+        const hasQuantity = features.some(
           (a: any) => (a.featureName ?? '').trim().toLowerCase() === 'quantity'
         )
         if (!hasQuantity) {
           Alert.alert('Error', 'Every SKU must have a quantity feature')
           return
         }
-        const signature = attributes
+        const signature = features
           .map((a: any) => `${(a.featureName ?? '').trim().toLowerCase()}::${a.featureValue.trim().toLowerCase()}`)
           .sort()
           .join('|')
@@ -146,21 +146,21 @@ export default function EditProduct() {
         return {
           id: variant.id,
           name: variant.name || null,
-          price: parseFloat(variant.price),
-          marketPrice: variant.marketPrice ? parseFloat(variant.marketPrice) : undefined,
+          price: variant.price as number,
+          marketPrice: variant.marketPrice ?? undefined,
           images: allUrls,
           isFlashAvailable: variant.isFlashAvailable || false,
-          flashPrice: variant.flashPrice ? parseFloat(variant.flashPrice) : undefined,
+          flashPrice: variant.flashPrice ?? undefined,
           isOffer: variant.isOffer || false,
           isComboOnly: variant.isComboOnly || false,
           isDeleted: variant.isDeleted || false,
           isSuspended: variant.isSuspended || false,
-          features: variant.attributes.map((attr: any) => ({
+          features: variant.features.map((attr: any) => ({
             featureName: attr.featureName,
             featureValue: attr.featureValue,
           })),
           comboItems: (variant.comboItems || []).map((ci: any) => ({
-            skuId: typeof ci.skuId === 'string' ? parseInt(ci.skuId) : ci.skuId,
+            skuId: ci.skuId,
           })),
         }
       })
diff --git a/apps/admin-ui/app/(drawer)/dashboard/send-notifications/index.tsx b/apps/admin-ui/app/(drawer)/dashboard/send-notifications/index.tsx
index f892d1b..6dd3118 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/send-notifications/index.tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/send-notifications/index.tsx
@@ -16,11 +16,11 @@ import {
   BottomDropdown,
 } from 'common-ui';
 import { trpc } from '@/src/trpc-client';
+import type { UserMiniInfo } from '@packages/shared';
 
-interface User {
-  id: number;
+// Notification recipient = shared mini user + eligibility flag
+type User = Omit<UserMiniInfo, 'name'> & {
   name: string | null;
-  mobile: string | null;
   isEligibleForNotif: boolean;
 }
 
diff --git a/apps/admin-ui/app/(drawer)/dashboard/user-management/[id].tsx b/apps/admin-ui/app/(drawer)/dashboard/user-management/[id].tsx
index 3f9ed1e..31925ea 100644
--- a/apps/admin-ui/app/(drawer)/dashboard/user-management/[id].tsx
+++ b/apps/admin-ui/app/(drawer)/dashboard/user-management/[id].tsx
@@ -1,4 +1,5 @@
 import React, { useCallback } from 'react';
+import type { OrderCardActionProps } from '@packages/shared'
 import {
   View,
   TouchableOpacity,
@@ -28,9 +29,7 @@ interface Order {
   itemCount: number;
 }
 
-interface OrderItemProps {
-  order: Order;
-  onPress: () => void;
+interface OrderItemProps extends OrderCardActionProps<Order> {
 }
 
 const getStatusColor = (status: string) => {
diff --git a/apps/admin-ui/components/CancelOrderDialog.tsx b/apps/admin-ui/components/CancelOrderDialog.tsx
index c9805fe..854efc3 100644
--- a/apps/admin-ui/components/CancelOrderDialog.tsx
+++ b/apps/admin-ui/components/CancelOrderDialog.tsx
@@ -1,14 +1,12 @@
 import React, { useState } from 'react';
+import type { OrderDialogBaseProps } from '@packages/shared'
 import { View, TouchableOpacity } from 'react-native';
 import { MyText, tw, BottomDialog, MyTextInput } from 'common-ui';
 import { trpc } from '@/src/trpc-client';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
 import { Alert } from 'react-native';
 
-interface CancelOrderDialogProps {
-  orderId: number;
-  open: boolean;
-  onClose: () => void;
+interface CancelOrderDialogProps extends OrderDialogBaseProps {
   onSuccess?: () => void;
 }
 
diff --git a/apps/admin-ui/components/ProductGroupForm.tsx b/apps/admin-ui/components/ProductGroupForm.tsx
index d8fbd12..4290085 100644
--- a/apps/admin-ui/components/ProductGroupForm.tsx
+++ b/apps/admin-ui/components/ProductGroupForm.tsx
@@ -5,15 +5,13 @@ import { MyText, tw, MyTextInput, MyTouchableOpacity, theme, BottomDropdown } fr
 import ProductsSelector from './ProductsSelector';
 import { trpc } from '../src/trpc-client';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import type { AdminProductGroup as SharedAdminProductGroup } from '@packages/shared';
 
-export interface ProductGroup {
-  id: number;
-  groupName: string;
-  description: string | null;
+// Serialized product group (string date, loosely typed products) anchored to shared
+export type ProductGroup = Omit<SharedAdminProductGroup, 'createdAt' | 'products'> & {
   createdAt: string;
   products: any[];
-  productCount: number;
-}
+};
 
 interface ProductGroupFormProps {
   group?: ProductGroup | null;
diff --git a/apps/admin-ui/components/ProductsSelector.tsx b/apps/admin-ui/components/ProductsSelector.tsx
index 254f02f..d743cc9 100644
--- a/apps/admin-ui/components/ProductsSelector.tsx
+++ b/apps/admin-ui/components/ProductsSelector.tsx
@@ -3,15 +3,10 @@ import { View } from 'react-native';
 import BottomDropdown, { DropdownOption } from 'common-ui/src/components/bottom-dropdown';
 import { trpc } from '../src/trpc-client';
 import { tw } from 'common-ui';
+import type { SkuSummary as SharedSkuSummary } from '@packages/shared';
 
-interface SkuSummary {
-  id: number;
-  productId: number;
-  productName: string;
-  label: string;
-  storeId: number | null;
-  price: string;
-}
+// Selector works with skus that may not have images resolved yet
+type SkuSummary = Omit<SharedSkuSummary, 'images'>
 
 interface Group {
   id: number;
diff --git a/apps/admin-ui/components/SlotForm.tsx b/apps/admin-ui/components/SlotForm.tsx
index 296b4ba..56fec03 100644
--- a/apps/admin-ui/components/SlotForm.tsx
+++ b/apps/admin-ui/components/SlotForm.tsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import type { SlotSnippetInput } from '@packages/shared'
 import { View, Text, TouchableOpacity, Alert } from 'react-native';
 import { Formik, FieldArray } from 'formik';
 import DateTimePickerMod from 'common-ui/src/components/date-time-picker';
@@ -6,12 +7,8 @@ import { tw, MyTextInput } from 'common-ui';
 import { trpc } from '../src/trpc-client';
 import ProductsSelector from '../components/ProductsSelector';
 
-interface VendorSnippet {
-  name: string;
-  groupIds: number[];
-  skuIds: number[];
-  validTill?: string;
-}
+// Snippet form row — single source in @packages/shared (complete payload)
+type VendorSnippet = SlotSnippetInput
 
 interface SlotFormProps {
   onSlotAdded?: () => void;
@@ -41,7 +38,7 @@ export default function SlotForm({
     name: snippet.name || '',
     groupIds: snippet.groupIds || [],
     skuIds: snippet.skuIds || [],
-    validTill: snippet.validTill || undefined,
+    validTill: snippet.validTill || null,
   })) as VendorSnippet[];
 
   const initialValues = {
@@ -80,7 +77,7 @@ export default function SlotForm({
       vendorSnippets: values.vendorSnippetList.map((snippet: VendorSnippet) => ({
         name: snippet.name,
         skuIds: snippet.skuIds,
-        validTill: snippet.validTill,
+        validTill: snippet.validTill ?? undefined,
       })),
     };
 
diff --git a/apps/admin-ui/components/SnippetOrdersView.tsx b/apps/admin-ui/components/SnippetOrdersView.tsx
index f48b6ef..feddfae 100644
--- a/apps/admin-ui/components/SnippetOrdersView.tsx
+++ b/apps/admin-ui/components/SnippetOrdersView.tsx
@@ -2,28 +2,25 @@ import React from 'react';
 import { View, ScrollView, TouchableOpacity } from 'react-native';
 import { MyText, tw, AppContainer } from 'common-ui';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import type {
+  AdminVendorSnippetOrderProduct,
+  AdminVendorSnippetOrderSummary as SharedSnippetOrderSummary,
+} from '@packages/shared';
 
-interface OrderProduct {
-  productId: number;
-  productName: string;
-  quantity: number;
-  price: number;
-  unit: string;
-  subtotal: number;
-}
+// Line item + order summary anchored to the shared vendor-order contract
+// (string totalAmount + any[] sequence at this view layer)
+type OrderProduct = Pick<
+  AdminVendorSnippetOrderProduct,
+  'productId' | 'productName' | 'quantity' | 'price' | 'unit' | 'subtotal'
+>
 
-interface SnippetOrder {
-  orderId: string;
-  orderDate: string;
-  customerName: string;
-  totalAmount: string;
+type SnippetOrder = Omit<SharedSnippetOrderSummary, 'totalAmount' | 'slotInfo' | 'products'> & {
+  totalAmount: string
   slotInfo: {
     time: string;
     sequence: any[];
   } | null;
   products: OrderProduct[];
-  matchedProducts: number[];
-  snippetCode: string;
 }
 
 interface SnippetOrdersViewProps {
diff --git a/apps/admin-ui/components/StoreForm.tsx b/apps/admin-ui/components/StoreForm.tsx
index da48a60..95c4308 100644
--- a/apps/admin-ui/components/StoreForm.tsx
+++ b/apps/admin-ui/components/StoreForm.tsx
@@ -7,14 +7,13 @@ import ProductsSelector from './ProductsSelector';
 import { trpc } from '../src/trpc-client';
 import usePickImage from 'common-ui/src/components/use-pick-image';
 import { useUploadToObjectStorage } from '../hooks/useUploadToObjectStore';
+import type { CreateStoreInput } from '@packages/shared';
 
-export interface StoreFormData {
-  name: string;
+// Store form values — required description + product selection on top of CreateStoreInput
+export type StoreFormData = Omit<CreateStoreInput, 'description'> & {
   description: string;
-  imageUrl?: string;
-  owner: number;
   products: number[];
-}
+};
 
 interface StoreFormProps {
   mode: 'create' | 'edit';
diff --git a/apps/admin-ui/src/components/ProductForm.tsx b/apps/admin-ui/src/components/ProductForm.tsx
index 99b315d..cdeb9f3 100644
--- a/apps/admin-ui/src/components/ProductForm.tsx
+++ b/apps/admin-ui/src/components/ProductForm.tsx
@@ -5,24 +5,29 @@ import * as Yup from 'yup'
 import { MyTextInput, BottomDropdown, MyText, tw, ImageUploaderNeo, ImageUploaderNeoItem, ImageUploaderNeoPayload, Checkbox, InfoDialog } from 'common-ui'
 import MaterialIcons from '@expo/vector-icons/MaterialIcons'
 import { trpc } from '../trpc-client'
+import type { CreateComboItemInput, CreateSkuInput } from '@packages/shared'
 import type { SkuFeatureLike } from '@packages/shared'
 
 // Feature input shape — single source: shared SkuFeatureLike
 type Attribute = SkuFeatureLike
 
-interface Variant {
+// Variant form state — anchored to the shared CreateSkuInput (numeric prices,
+// same field names). Images are managed separately via variantImages state.
+type Variant = Omit<
+  CreateSkuInput,
+  'name' | 'price' | 'marketPrice' | 'flashPrice' | 'images' | 'features' | 'comboItems'
+> & {
   id?: number
   name: string
-  price: string
-  marketPrice: string
+  price?: number
+  marketPrice: number | null
+  flashPrice: number | null
   isFlashAvailable: boolean
-  flashPrice: string
   isOffer: boolean
   isComboOnly: boolean
-  isDeleted?: boolean
   isSuspended: boolean
-  attributes: Attribute[]
-  comboItems: { skuId: number | string }[]
+  features: Attribute[]
+  comboItems: CreateComboItemInput[]
 }
 
 interface ProductFormData {
@@ -58,15 +63,15 @@ const isQuantityFeature = (attr: Attribute): boolean =>
 const defaultVariant = (): Variant => ({
   id: undefined,
   name: '',
-  price: '',
-  marketPrice: '',
+  price: undefined,
+  marketPrice: null,
   isFlashAvailable: false,
-  flashPrice: '',
+  flashPrice: null,
   isOffer: false,
   isComboOnly: false,
   isDeleted: false,
   isSuspended: false,
-  attributes: [quantityAttribute()],
+  features: [quantityAttribute()],
   comboItems: [],
 })
 
@@ -100,7 +105,7 @@ const productValidationSchema = Yup.object().shape({
           .nullable()
           .transform((value, originalValue) => (originalValue === '' ? null : value))
           .optional(),
-        attributes: Yup.array()
+        features: Yup.array()
           .min(1, 'At least one attribute is required')
           .of(
             Yup.object().shape({
@@ -113,7 +118,7 @@ const productValidationSchema = Yup.object().shape({
       if (!Array.isArray(variants)) return true
       const seen = new Set<string>()
       for (const variant of variants) {
-        const attrs = variant?.attributes || []
+        const attrs = variant?.features || []
         const signature = variantSignature(attrs as Attribute[])
         if (seen.has(signature)) {
           return this.createError({ message: 'Two variants have the same attributes' })
@@ -125,7 +130,7 @@ const productValidationSchema = Yup.object().shape({
     .test('quantity-feature', 'Each SKU must have exactly one quantity feature', function (variants) {
       if (!Array.isArray(variants)) return true
       for (const variant of variants) {
-        const attrs = variant?.attributes || []
+        const attrs = variant?.features || []
         const quantityCount = attrs.filter(
           (a) => ((a as Attribute)?.featureName ?? '').trim().toLowerCase() === 'quantity'
         ).length
@@ -180,7 +185,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
   const { data: skusData } = trpc.common.product.getAllSkusSummary.useQuery({})
   const skuOptions = (skusData?.skus || []).map((sku) => ({
     label: sku.label,
-    value: sku.id.toString(),
+    value: sku.id,
   }))
 
   // Make sure every SKU starts with a 'quantity' feature (auto-added at the
@@ -189,11 +194,11 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
     return {
       ...initialValues,
       variants: (initialValues.variants || []).map((v) => {
-        const hasQuantity = (v.attributes || []).some(
+        const hasQuantity = (v.features || []).some(
           (a) => (a.featureName ?? '').trim().toLowerCase() === 'quantity'
         )
         if (hasQuantity) return v
-        return { ...v, attributes: [quantityAttribute(), ...(v.attributes || [])] }
+        return { ...v, features: [quantityAttribute(), ...(v.features || [])] }
       }),
     }
   }, [initialValues])
@@ -211,7 +216,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
           ...values,
           variants: values.variants.map((v) => ({
             ...v,
-            attributes: v.attributes.map((a) => ({
+            features: v.features.map((a) => ({
               ...a,
               featureName: isQuantityFeature(a) ? 'quantity' : (a.featureName ?? '').trim() || null,
             })),
@@ -347,7 +352,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                       style={{ marginBottom: 12 }}
                     />
 
-                    <FieldArray name={`variants.${vIndex}.attributes`}>
+                    <FieldArray name={`variants.${vIndex}.features`}>
                       {({ push: pushAttr, remove: removeAttr }) => (
                         <View style={tw`mb-3`}>
                           <View style={tw`flex-row justify-between items-center mb-2`}>
@@ -360,12 +365,12 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                               <MyText style={tw`text-gray-600 text-xs ml-0.5`}>Add</MyText>
                             </TouchableOpacity>
                           </View>
-                          {variant.attributes.map((attr, aIndex) => {
-                            const quantityCount = variant.attributes.filter(isQuantityFeature).length
+                          {variant.features.map((attr, aIndex) => {
+                            const quantityCount = variant.features.filter(isQuantityFeature).length
                             // Quantity features are locked (non-editable), but if there
                             // are duplicates (e.g. 'quantity' + 'Quantity') the user must
                             // be able to delete the extras to fix the form.
-                            const canDelete = variant.attributes.length > 1 && (!isQuantityFeature(attr) || quantityCount > 1)
+                            const canDelete = variant.features.length > 1 && (!isQuantityFeature(attr) || quantityCount > 1)
                             return (
                             <View key={aIndex} style={tw`flex-row items-center mb-2 gap-2`}>
                               <View style={tw`flex-1`}>
@@ -374,7 +379,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                                   value={attr.featureName ?? ''}
                                   onChangeText={(text) =>
                                     setFieldValue(
-                                      `variants.${vIndex}.attributes.${aIndex}.featureName`,
+                                      `variants.${vIndex}.features.${aIndex}.featureName`,
                                       text.trim().toLowerCase() === 'quantity' ? 'quantity' : text
                                     )
                                   }
@@ -386,7 +391,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                                 <MyTextInput
                                   placeholder={isQuantityFeature(attr) ? 'e.g. 0.5 kg' : 'Value'}
                                   value={attr.featureValue}
-                                  onChangeText={handleChange(`variants.${vIndex}.attributes.${aIndex}.featureValue`)}
+                                  onChangeText={handleChange(`variants.${vIndex}.features.${aIndex}.featureValue`)}
                                 />
                               </View>
                               {canDelete && (
@@ -420,7 +425,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                           topLabel="Market Price"
                           placeholder="MRP"
                           keyboardType="numeric"
-                          value={variant.marketPrice}
+                          value={variant.marketPrice?.toString() ?? ''}
                           onChangeText={handleChange(`variants.${vIndex}.marketPrice`)}
                         />
                       </View>
@@ -429,7 +434,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                           topLabel="Our Price"
                           placeholder="Selling price"
                           keyboardType="numeric"
-                          value={variant.price}
+                          value={variant.price?.toString() ?? ''}
                           onChangeText={handleChange(`variants.${vIndex}.price`)}
                         />
                       </View>
@@ -440,7 +445,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                         checked={variant.isFlashAvailable}
                         onPress={() => {
                           setFieldValue(`variants.${vIndex}.isFlashAvailable`, !variant.isFlashAvailable)
-                          if (variant.isFlashAvailable) setFieldValue(`variants.${vIndex}.flashPrice`, '')
+                          if (variant.isFlashAvailable) setFieldValue(`variants.${vIndex}.flashPrice`, null)
                         }}
                         style={tw`mr-3`}
                       />
@@ -483,7 +488,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                         topLabel="Flash Price"
                         placeholder="Enter flash price"
                         keyboardType="numeric"
-                        value={variant.flashPrice}
+                        value={variant.flashPrice?.toString() ?? ''}
                         onChangeText={handleChange(`variants.${vIndex}.flashPrice`)}
                         style={{ marginBottom: 12 }}
                       />
@@ -515,7 +520,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                           <TouchableOpacity
                             onPress={() => {
                               const items = variant.comboItems || []
-                              items.push({ skuId: '' })
+                              items.push({ skuId: 0 })
                               setFieldValue(`variants.${vIndex}.comboItems`, items)
                             }}
                             style={tw`bg-gray-200 px-2 py-0.5 rounded flex-row items-center`}
@@ -530,7 +535,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                               <BottomDropdown
                                 label="SKU"
                                 value={ci.skuId}
-                                options={skuOptions.map((opt: { label: string; value: string }) => ({
+                                options={skuOptions.map((opt: { label: string; value: number }) => ({
                                   ...opt,
                                   // Disable SKUs already picked in another row of this combo.
                                   disabled: (variant.comboItems || []).some(
@@ -546,7 +551,7 @@ const ProductForm = forwardRef<ProductFormRef, ProductFormProps>(({
                                     Alert.alert('Duplicate', 'This product is already in the combo')
                                     return
                                   }
-                                  setFieldValue(`variants.${vIndex}.comboItems.${cIndex}.skuId`, val)
+                                  setFieldValue(`variants.${vIndex}.comboItems.${cIndex}.skuId`, Number(val))
                                 }}
                                 placeholder="Select SKU"
                               />
diff --git a/apps/admin-ui/types/drag-order-item.ts b/apps/admin-ui/types/drag-order-item.ts
new file mode 100644
index 0000000..447013f
--- /dev/null
+++ b/apps/admin-ui/types/drag-order-item.ts
@@ -0,0 +1,6 @@
+// Common props for draggable reorder rows (customize-app / product-tags order screens)
+export interface DragOrderItemProps<T> {
+  item: T
+  drag: () => void
+  isActive: boolean
+}
diff --git a/apps/admin-ui/types/vendor-snippets.ts b/apps/admin-ui/types/vendor-snippets.ts
index 6285c02..cf433c1 100644
--- a/apps/admin-ui/types/vendor-snippets.ts
+++ b/apps/admin-ui/types/vendor-snippets.ts
@@ -1,4 +1,5 @@
 import type { IdName } from '@packages/shared';
+import type { AdminVendorSnippetInput } from '@packages/shared'
 
 export type VendorSnippetProduct = IdName;
 
@@ -22,12 +23,10 @@ export interface VendorSnippet {
   } | null;
 }
 
-export interface VendorSnippetForm {
+// Vendor-snippet form row — anchored to the shared input (wire validTill);
+// form requires slotId and carries the serialized createdAt.
+export type VendorSnippetForm = Omit<AdminVendorSnippetInput, 'slotId'> & {
   id: number;
-  snippetCode: string;
   slotId: number;
-  isPermanent: boolean;
-  skuIds: number[];
-  validTill: string | null;
   createdAt: string;
 }
\ No newline at end of file
diff --git a/apps/backend/src/dbService.ts b/apps/backend/src/dbService.ts
index 3a870cc..d2c5c1e 100644
--- a/apps/backend/src/dbService.ts
+++ b/apps/backend/src/dbService.ts
@@ -82,8 +82,7 @@ export type {
   AdminVendorSnippetWithSlot,
   AdminVendorSnippetProduct,
   AdminVendorSnippetWithProducts,
-  AdminVendorSnippetCreateInput,
-  AdminVendorSnippetUpdateInput,
+  AdminVendorSnippetInput,
   AdminVendorSnippetDeleteResult,
   AdminVendorSnippetOrderProduct,
   AdminVendorSnippetOrderSummary,
diff --git a/apps/backend/src/stores/product-store.ts b/apps/backend/src/stores/product-store.ts
index f3b41e6..a044bee 100644
--- a/apps/backend/src/stores/product-store.ts
+++ b/apps/backend/src/stores/product-store.ts
@@ -14,31 +14,18 @@ import {
   type ProductTagData,
   type ProductComboCacheData,
 } from '@/src/dbService'
+import type { ProductDetailCore } from '@packages/shared'
 import { scaffoldAssetUrl } from '@/src/lib/s3-client'
 
-// Uniform Product Type (matches getProductDetails return)
-interface Product {
-  id: number
-  productId: number
-  name: string
-  shortDescription: string | null
-  longDescription: string | null
-  price: string
-  marketPrice: string | null
-  unitNotation: string
-  images: string[]
-  isOutOfStock: boolean
+// Uniform Product Type (matches getProductDetails return) — anchored to the
+// shared ProductDetailCore; cache-specific relations stay local.
+interface Product extends ProductDetailCore {
   store: { id: number; name: string; description: string | null } | null
-  incrementStep: number
-  productQuantity: number
-  isFlashAvailable: boolean
-  flashPrice: string | null
   deliverySlots: Array<{ id: number; deliveryTime: Date; freezeTime: Date; isCapacityFull: boolean }>
   specialDeals: Array<{ quantity: string; price: string; validTill: Date }>
   productTags: string[]
-  productType: string
-  isComboOnly: boolean
   isOffer: boolean
+  isComboOnly: boolean
   comboItems: Array<{
     skuId: number
     skuName: string | null
diff --git a/apps/backend/src/stores/product-tag-store.ts b/apps/backend/src/stores/product-tag-store.ts
index 1241af6..814b71b 100644
--- a/apps/backend/src/stores/product-tag-store.ts
+++ b/apps/backend/src/stores/product-tag-store.ts
@@ -8,11 +8,11 @@ import {
   type TagProductMapping,
 } from '@/src/dbService'
 import { scaffoldAssetUrl } from '@/src/lib/s3-client'
+import type { ProductTagCore } from '@packages/shared'
 
-// Tag Type (matches getDashboardTags return)
-interface Tag {
+// Tag Type (matches getDashboardTags return) — anchored to the shared tag core
+interface Tag extends ProductTagCore {
   id: number
-  tagName: string
   tagDescription: string | null
   imageUrl: string | null
   isDashboardTag: boolean
diff --git a/apps/backend/src/stores/slot-store.ts b/apps/backend/src/stores/slot-store.ts
index 80c1590..ceb6215 100644
--- a/apps/backend/src/stores/slot-store.ts
+++ b/apps/backend/src/stores/slot-store.ts
@@ -3,14 +3,12 @@ import {
   getAllSlotsWithProductsForCache,
   type SlotWithProductsData,
 } from '@/src/dbService'
+import type { UserProductDeliverySlot } from '@packages/shared'
 import { scaffoldAssetUrl } from '@/src/lib/s3-client'
 import dayjs from 'dayjs'
 
-// Define the structure for slot with products
-interface SlotWithProducts {
-  id: number
-  deliveryTime: Date
-  freezeTime: Date
+// Define the structure for slot with products — anchored to the shared slot core
+interface SlotWithProducts extends UserProductDeliverySlot {
   isActive: boolean
   isCapacityFull: boolean
   products: Array<{
@@ -28,10 +26,7 @@ interface SlotWithProducts {
   }>
 }
 
-interface SlotInfo {
-  id: number
-  deliveryTime: Date
-  freezeTime: Date
+interface SlotInfo extends UserProductDeliverySlot {
   isCapacityFull: boolean
 }
 
diff --git a/apps/backend/src/trpc/apis/admin-apis/apis/coupon.ts b/apps/backend/src/trpc/apis/admin-apis/apis/coupon.ts
index 703cd2a..f475a86 100644
--- a/apps/backend/src/trpc/apis/admin-apis/apis/coupon.ts
+++ b/apps/backend/src/trpc/apis/admin-apis/apis/coupon.ts
@@ -20,7 +20,7 @@ import {
   checkReservedCouponExists,
   getOrderWithUser,
 } from '@/src/dbService'
-import type { Coupon, CouponValidationResult, UserMiniInfo } from '@packages/shared'
+import type { Coupon, CouponFormInput, CouponValidationResult, UserMiniInfo } from '@packages/shared'
 
 const createCouponBodySchema = z.object({
   couponCode: z.string().optional(),
@@ -100,20 +100,22 @@ export const couponRouter = router({
           throw new Error(`Coupon code already exists: ${finalCouponCode}`);
         }
 
+        // Complete CouponFormInput — every field sent (nullable columns get null)
         const coupon = await createCouponWithRelations(
           {
             couponCode: finalCouponCode,
             isUserBased: isUserBased || false,
-            discountPercent: discountPercent?.toString(),
-            flatDiscount: flatDiscount?.toString(),
-            minOrder: minOrder?.toString(),
+            discountPercent: discountPercent?.toString() ?? null,
+            flatDiscount: flatDiscount?.toString() ?? null,
+            minOrder: minOrder?.toString() ?? null,
             skuIds: skuIds || null,
             createdBy: staffUserId,
-            maxValue: maxValue?.toString(),
+            maxValue: maxValue?.toString() ?? null,
             isApplyForAll: isApplyForAll || false,
-            validTill: validTill ? dayjs(validTill).toDate() : undefined,
-            maxLimitForUser,
+            validTill: validTill ? dayjs(validTill).toDate() : null,
+            maxLimitForUser: maxLimitForUser ?? null,
             exclusiveApply: exclusiveApply || false,
+            isInvalidated: false,
           },
           applicableUsers,
           applicableProducts
@@ -177,21 +179,29 @@ export const couponRouter = router({
         }
       }
 
-      // Prepare update data
-      const updateData: any = {};
+      // Prepare update data — always a COMPLETE CouponFormInput: fields present
+      // in the payload win, everything else keeps its current value (the data
+      // is still sent even where the caller doesn't need it).
+      const existing = await getCouponByIdFromDb(id);
+      if (!existing) {
+        throw new Error("Coupon not found");
+      }
       const updatedCode = updates.couponCodes?.[0]?.trim() || updates.couponCode;
-      if (updatedCode !== undefined && updatedCode !== '') updateData.couponCode = updatedCode.trim().toUpperCase();
-      if (updates.isUserBased !== undefined) updateData.isUserBased = updates.isUserBased;
-      if (updates.discountPercent !== undefined) updateData.discountPercent = updates.discountPercent?.toString();
-      if (updates.flatDiscount !== undefined) updateData.flatDiscount = updates.flatDiscount?.toString();
-      if (updates.minOrder !== undefined) updateData.minOrder = updates.minOrder?.toString();
-      if (updates.maxValue !== undefined) updateData.maxValue = updates.maxValue?.toString();
-      if (updates.isApplyForAll !== undefined) updateData.isApplyForAll = updates.isApplyForAll;
-      if (updates.validTill !== undefined) updateData.validTill = updates.validTill ? dayjs(updates.validTill).toDate() : null;
-      if (updates.maxLimitForUser !== undefined) updateData.maxLimitForUser = updates.maxLimitForUser;
-      if (updates.exclusiveApply !== undefined) updateData.exclusiveApply = updates.exclusiveApply;
-      if (updates.isInvalidated !== undefined) updateData.isInvalidated = updates.isInvalidated;
-      if (updates.skuIds !== undefined) updateData.skuIds = updates.skuIds;
+      const updateData: CouponFormInput = {
+        couponCode: updatedCode !== undefined && updatedCode !== '' ? updatedCode.trim().toUpperCase() : existing.couponCode,
+        isUserBased: updates.isUserBased ?? existing.isUserBased,
+        discountPercent: updates.discountPercent !== undefined ? (updates.discountPercent?.toString() ?? null) : existing.discountPercent,
+        flatDiscount: updates.flatDiscount !== undefined ? (updates.flatDiscount?.toString() ?? null) : existing.flatDiscount,
+        minOrder: updates.minOrder !== undefined ? (updates.minOrder?.toString() ?? null) : existing.minOrder,
+        skuIds: updates.skuIds !== undefined ? updates.skuIds : existing.skuIds ?? null,
+        maxValue: updates.maxValue !== undefined ? (updates.maxValue?.toString() ?? null) : existing.maxValue,
+        isApplyForAll: updates.isApplyForAll ?? existing.isApplyForAll,
+        validTill: updates.validTill !== undefined ? (updates.validTill ? dayjs(updates.validTill).toDate() : null) : existing.validTill,
+        maxLimitForUser: updates.maxLimitForUser ?? existing.maxLimitForUser,
+        exclusiveApply: updates.exclusiveApply ?? existing.exclusiveApply,
+        isInvalidated: updates.isInvalidated ?? existing.isInvalidated,
+        createdBy: existing.createdBy,
+      };
 
       // Using dbService helper (new implementation)
       const coupon = await updateCouponWithRelations(
diff --git a/apps/backend/src/trpc/apis/admin-apis/apis/product.ts b/apps/backend/src/trpc/apis/admin-apis/apis/product.ts
index f4475ff..bc66c67 100644
--- a/apps/backend/src/trpc/apis/admin-apis/apis/product.ts
+++ b/apps/backend/src/trpc/apis/admin-apis/apis/product.ts
@@ -849,7 +849,7 @@ export const productRouter = router({
       }),
 
       getProductTags: protectedProcedure
-        .query(async (): Promise<{ tags: Array<{ id: number; tagName: string; tagDescription: string | null; imageUrl: string | null; isDashboardTag: boolean; relatedStores: unknown; createdAt: Date }>; message: string }> => {
+        .query(async (): Promise<{ tags: Array<{ id: number; tagName: string; tagDescription: string | null; imageUrl: string | null; isDashboardTag: boolean; relatedStores: number[] | null; createdAt: Date }>; message: string }> => {
           const tags = await getAllProductTagInfosInDb()
 
           const tagsWithSignedUrls = await Promise.all(
diff --git a/apps/backend/src/trpc/apis/admin-apis/apis/slots.ts b/apps/backend/src/trpc/apis/admin-apis/apis/slots.ts
index 7c7932d..43b65e2 100644
--- a/apps/backend/src/trpc/apis/admin-apis/apis/slots.ts
+++ b/apps/backend/src/trpc/apis/admin-apis/apis/slots.ts
@@ -52,6 +52,7 @@ const createSlotSchema = z.object({
     name: z.string().min(1),
     skuIds: z.array(z.number().int().positive()).min(1),
     validTill: z.string().optional(),
+    groupIds: z.array(z.number()).optional(),
   })).optional(),
   groupIds: z.array(z.number()).optional(),
 });
@@ -70,6 +71,7 @@ const updateSlotSchema = z.object({
     name: z.string().min(1),
     skuIds: z.array(z.number().int().positive()).min(1),
     validTill: z.string().optional(),
+    groupIds: z.array(z.number()).optional(),
   })).optional(),
   groupIds: z.array(z.number()).optional(),
 });
@@ -297,7 +299,13 @@ export const slotsRouter = router({
         freezeTime,
         isActive,
         skuIds,
-        vendorSnippets: snippets,
+        // Complete SlotSnippetInput payloads — groupIds unused by sqlite but
+        // always sent; absent validTill becomes null.
+        vendorSnippets: snippets?.map((snippet) => ({
+          ...snippet,
+          groupIds: snippet.groupIds ?? [],
+          validTill: snippet.validTill ?? null,
+        })),
         groupIds,
       })
 
@@ -462,7 +470,13 @@ export const slotsRouter = router({
         freezeTime,
         isActive,
         skuIds,
-        vendorSnippets: snippets,
+        // Complete SlotSnippetInput payloads — groupIds unused by sqlite but
+        // always sent; absent validTill becomes null.
+        vendorSnippets: snippets?.map((snippet) => ({
+          ...snippet,
+          groupIds: snippet.groupIds ?? [],
+          validTill: snippet.validTill ?? null,
+        })),
         groupIds,
       })
 
diff --git a/apps/backend/src/trpc/apis/user-apis/apis/product.ts b/apps/backend/src/trpc/apis/user-apis/apis/product.ts
index e7fd996..a4e439c 100644
--- a/apps/backend/src/trpc/apis/user-apis/apis/product.ts
+++ b/apps/backend/src/trpc/apis/user-apis/apis/product.ts
@@ -51,6 +51,7 @@ export const productRouter = router({
         
         return {
           ...cachedProduct,
+          images: cachedProduct.images as string[],
           deliverySlots: filteredSlots
         };
       }
diff --git a/apps/user-ui/app/(drawer)/(tabs)/home/index.tsx b/apps/user-ui/app/(drawer)/(tabs)/home/index.tsx
index fd51a53..986629e 100755
--- a/apps/user-ui/app/(drawer)/(tabs)/home/index.tsx
+++ b/apps/user-ui/app/(drawer)/(tabs)/home/index.tsx
@@ -365,13 +365,7 @@ const ProductItem = memo(({ item, onPress }: ProductItemProps) => {
   );
 });
 
-interface ListHeaderProps {
-  dashboardTags: any[];
-  activeTagId: number | null;
-  productsByTagId: Record<number, any[]>;
-  expandedByTagId: Record<number, boolean>;
-  onToggleExpand: (tagId: number) => void;
-  onProductPress: (id: number) => void;
+interface ListHeaderProps extends TagSceneProps {
   onSelectTag: (id: number) => void;
   storesData: any;
   sortedSlots: any[];
diff --git a/apps/user-ui/app/(drawer)/(tabs)/me/addresses/index.tsx b/apps/user-ui/app/(drawer)/(tabs)/me/addresses/index.tsx
index cb53e50..055436b 100644
--- a/apps/user-ui/app/(drawer)/(tabs)/me/addresses/index.tsx
+++ b/apps/user-ui/app/(drawer)/(tabs)/me/addresses/index.tsx
@@ -1,4 +1,5 @@
 import React, { useState } from 'react';
+import type { UserAddress } from '@packages/shared'
 import { View, Alert } from 'react-native';
 import { useRouter } from 'expo-router';
 import { AppContainer, MyText, tw, useMarkDataFetchers, MyFlatList, MyTouchableOpacity, BottomDialog, RawBottomDialog } from 'common-ui';
@@ -6,19 +7,14 @@ import { trpc } from '@/src/trpc-client';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
 import AddressForm from '@/src/components/AddressForm';
 
-interface Address {
-  id: number;
-  name: string;
-  phone: string;
-  addressLine1: string;
-  addressLine2: string | null;
-  city: string;
-  state: string;
-  pincode: string;
-  isDefault: boolean;
-  latitude?: number | null;
-  longitude?: number | null;
-  googleMapsUrl?: string | null;
+// Address view — required core of the shared UserAddress + optional geo fields
+type Address = Pick<
+  UserAddress,
+  'id' | 'name' | 'phone' | 'addressLine1' | 'addressLine2' | 'city' | 'state' | 'pincode' | 'isDefault'
+> & {
+  latitude?: number | null
+  longitude?: number | null
+  googleMapsUrl?: string | null
 }
 
 function AddressCard({ address, onEdit, onDelete, onSetDefault, isDeleting }: {
diff --git a/apps/user-ui/components/NextOrderGlimpse.tsx b/apps/user-ui/components/NextOrderGlimpse.tsx
index c122dff..c459f4a 100644
--- a/apps/user-ui/components/NextOrderGlimpse.tsx
+++ b/apps/user-ui/components/NextOrderGlimpse.tsx
@@ -1,4 +1,5 @@
 import React, { useState, useCallback, useRef } from 'react';
+import type { OrderCardActionProps } from '@packages/shared'
 import { View, TouchableOpacity, ActivityIndicator, Linking, ScrollView, Dimensions, NativeSyntheticEvent, NativeScrollEvent } from 'react-native';
 import { useRouter } from 'expo-router';
 import { tw, MyText } from 'common-ui';
@@ -16,9 +17,7 @@ const { width: screenWidth } = Dimensions.get('window');
 const CARD_WIDTH = (screenWidth - 48) * 0.95; // card width (24px padding each side), reduced 5%
 const SNAP_INTERVAL = CARD_WIDTH + 24; // card + right margin = page width
 
-interface OrderCardProps {
-  order: Order;
-  onPress: () => void;
+interface OrderCardProps extends OrderCardActionProps<Order> {
   supportMobile?: string | null;
 }
 
diff --git a/apps/user-ui/components/SlotSpecificView.tsx b/apps/user-ui/components/SlotSpecificView.tsx
index 7880df4..b61c0eb 100644
--- a/apps/user-ui/components/SlotSpecificView.tsx
+++ b/apps/user-ui/components/SlotSpecificView.tsx
@@ -26,10 +26,7 @@ const { width: screenWidth } = Dimensions.get("window");
 const drawerWidth = 85; // From layout drawerStyle
 const itemWidth = (screenWidth - drawerWidth - 48) / 2; // Account for drawer width
 
-interface SlotLayoutProps {
-  slotId?: number;
-  storeId?: number;
-  baseUrl: string;
+interface SlotLayoutProps extends SlotProductsProps {
   isForFlashDelivery?: boolean;
 }
 
@@ -330,7 +327,7 @@ const CompactProductCard = ({
 
 interface SlotProductsProps {
   slotId?: number;
-  storeId?: number; 
+  storeId?: number;
   baseUrl: string;
 }
 
diff --git a/apps/user-ui/components/stores/flashNavigationStore.ts b/apps/user-ui/components/stores/flashNavigationStore.ts
index 17e2e95..40caf22 100644
--- a/apps/user-ui/components/stores/flashNavigationStore.ts
+++ b/apps/user-ui/components/stores/flashNavigationStore.ts
@@ -1,10 +1,7 @@
 import { create } from 'zustand';
+import type { FlashNavigationState as SharedFlashNavigationState } from '@packages/shared';
 
-interface FlashNavigationState {
-  shouldNavigateToCart: boolean;
-  setShouldNavigateToCart: (value: boolean) => void;
-  reset: () => void;
-}
+type FlashNavigationState = SharedFlashNavigationState & { reset: () => void }
 
 export const useFlashNavigationStore = create<FlashNavigationState>((set) => ({
   shouldNavigateToCart: false,
diff --git a/apps/user-ui/hooks/cart-query-hooks.tsx b/apps/user-ui/hooks/cart-query-hooks.tsx
index a35af89..43fef88 100644
--- a/apps/user-ui/hooks/cart-query-hooks.tsx
+++ b/apps/user-ui/hooks/cart-query-hooks.tsx
@@ -2,7 +2,7 @@ import { useCentralProductStore } from '@/src/store/centralProductStore';
 import { useCentralSlotStore } from '@/src/store/centralSlotStore';
 import { Alert } from 'react-native';
 import { useQuery, useMutation, useQueryClient, UseQueryResult, UseMutationResult } from '@tanstack/react-query';
-import type { CartData as SharedCartData } from '@packages/shared';
+import type { CartData as SharedCartData, ProductSummaryCore } from '@packages/shared';
 import { StorageServiceCasual } from 'common-ui/src/services/StorageServiceCasual';
 
 // Cart type definition
@@ -12,26 +12,21 @@ const getCartStorageKey = (cartType: CartType = "regular"): string => {
   return cartType === "flash" ? "flash_cart_items" : "cart_items";
 };
 
-interface LocalCartItem {
-  id: number;
-  skuId: number;
-  quantity: number;
-  slotId: number;
-  addedAt: string;
-}
+type LocalCartItem = Omit<CartItem, 'subtotal'>
 
-interface ProductSummary {
-  id: number;
-  price: string;
-  incrementStep: number;
-  isOutOfStock: boolean;
-  isFlashAvailable: boolean;
-  name?: string;
-  flashPrice?: string | null;
-  images?: string[];
-  productQuantity?: number;
-  unitNotation?: string;
-  marketPrice?: string | null;
+// Cart product summary — anchored to the shared ProductSummaryCore; the cart
+// view keeps most display fields optional and adds the flash flags.
+type ProductSummary = Omit<
+  ProductSummaryCore,
+  'name' | 'images' | 'unitNotation' | 'marketPrice'
+> & {
+  isFlashAvailable: boolean
+  name?: string
+  flashPrice?: string | null
+  images?: string[] | null
+  productQuantity?: number
+  unitNotation?: string
+  marketPrice?: string | null
 }
 
 export interface CartItem {
diff --git a/apps/user-ui/hooks/useAuthenticatedRoute.ts b/apps/user-ui/hooks/useAuthenticatedRoute.ts
index e90af7d..41194b2 100644
--- a/apps/user-ui/hooks/useAuthenticatedRoute.ts
+++ b/apps/user-ui/hooks/useAuthenticatedRoute.ts
@@ -1,13 +1,12 @@
 import { useFocusEffect } from '@react-navigation/native';
+import type { AuthRedirectOptions } from '@packages/shared'
 import { useRouter } from 'expo-router';
 import { useAuth } from '@/src/contexts/AuthContext';
 import type { RedirectState } from '@/src/contexts/AuthContext';
 import { StorageServiceCasual } from 'common-ui';
 import constants from '@/src/constants';
 
-interface AuthenticatedRouteOptions {
-  targetUrl?: string;
-  queryParams?: Record<string, any>;
+interface AuthenticatedRouteOptions extends AuthRedirectOptions {
 }
 
 export function useAuthenticatedRoute(options: AuthenticatedRouteOptions = {}) {
diff --git a/apps/user-ui/src/contexts/AuthContext.tsx b/apps/user-ui/src/contexts/AuthContext.tsx
index def78c5..dd1f094 100644
--- a/apps/user-ui/src/contexts/AuthContext.tsx
+++ b/apps/user-ui/src/contexts/AuthContext.tsx
@@ -7,9 +7,9 @@ import { trpc } from '@/src/trpc-client';
 import { StorageServiceCasual } from 'common-ui';
 import { useRouter } from 'expo-router';
 import constants from '@/src/constants';
-import type { ReactParentComponent } from '@packages/shared';
+import type { AuthRedirectOptions, ReactParentComponent } from '@packages/shared';
 
-export interface RedirectState {
+export interface RedirectState extends AuthRedirectOptions {
   targetUrl: string;
   queryParams: Record<string, any>;
   timestamp: number;
diff --git a/apps/user-ui/src/hooks/prominent-api-hooks.ts b/apps/user-ui/src/hooks/prominent-api-hooks.ts
index 3f078fb..c197465 100644
--- a/apps/user-ui/src/hooks/prominent-api-hooks.ts
+++ b/apps/user-ui/src/hooks/prominent-api-hooks.ts
@@ -2,6 +2,7 @@ import React, { useEffect, useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import axios from 'axios'
 import { trpc } from '@/src/trpc-client'
+import type { ProductPriceFlags } from '@packages/shared'
 import { AllProductsApiType, StoresApiType, SlotsApiType, EssentialConstsApiType, StoreWithProductsApiType, AvailabilityApiType } from "@backend/trpc/router";
 import { CACHE_FILENAMES } from "@packages/shared";
 import { StorageServiceCasual } from 'common-ui';
@@ -58,13 +59,7 @@ type AvailabilityResponse = AvailabilityApiType;
 type BaseProduct = AllProductsApiType['products'][number]
 export type AvailabilityEntry = AvailabilityApiType['availability'][number]
 
-export type MergedProduct = BaseProduct & {
-  price: number
-  marketPrice: number | null
-  flashPrice: string | null
-  isFlashAvailable: boolean
-  isOutOfStock: boolean
-  isSuspended: boolean
+export type MergedProduct = BaseProduct & ProductPriceFlags & {
   isComboOnly?: boolean
 }
 
diff --git a/apps/user-ui/src/store/addressStore.ts b/apps/user-ui/src/store/addressStore.ts
index fba96ae..5bb8bdd 100644
--- a/apps/user-ui/src/store/addressStore.ts
+++ b/apps/user-ui/src/store/addressStore.ts
@@ -1,11 +1,7 @@
 import { create } from 'zustand';
+import type { AddressSelectionState } from '@packages/shared';
 
-interface AddressState {
-  selectedAddressId: number | null;
-  setSelectedAddressId: (addressId: number | null) => void;
-}
-
-export const useAddressStore = create<AddressState>((set) => ({
+export const useAddressStore = create<AddressSelectionState>((set) => ({
   selectedAddressId: null,
   setSelectedAddressId: (addressId) => set({ selectedAddressId: addressId }),
 }));
\ No newline at end of file
diff --git a/apps/user-ui/src/store/centralProductStore.ts b/apps/user-ui/src/store/centralProductStore.ts
index 3d4499a..ad38a4c 100644
--- a/apps/user-ui/src/store/centralProductStore.ts
+++ b/apps/user-ui/src/store/centralProductStore.ts
@@ -1,16 +1,11 @@
 import { create } from 'zustand'
 import { useEffect } from 'react'
 import { useAllProducts, type MergedProduct } from '@/src/hooks/prominent-api-hooks'
+import type { CentralProductState as CentralProductsState } from '@packages/shared'
 
 export type Product = MergedProduct
 
-interface CentralProductState {
-  products: Product[]
-  productsById: Record<number, Product>
-  refetchProducts: (() => Promise<void>) | null
-  setProducts: (products: Product[]) => void
-  setRefetchProducts: (refetch: () => Promise<void>) => void
-}
+type CentralProductState = CentralProductsState<Product>
 
 export const useCentralProductStore = create<CentralProductState>((set) => ({
   products: [],
diff --git a/apps/user-ui/src/store/navigationStore.ts b/apps/user-ui/src/store/navigationStore.ts
index 02e19fc..5d507c4 100644
--- a/apps/user-ui/src/store/navigationStore.ts
+++ b/apps/user-ui/src/store/navigationStore.ts
@@ -1,11 +1,5 @@
 import { create } from 'zustand';
-
-interface NavigationState {
-  isNavigatedFromHome: boolean;
-  setNavigatedFromHome: (value: boolean) => void;
-  selectedStoreId: number | null;
-  setSelectedStoreId: (storeId: number | null) => void;
-}
+import type { NavigationState } from '@packages/shared';
 
 export const useNavigationStore = create<NavigationState>((set) => ({
   isNavigatedFromHome: false,
diff --git a/apps/user-ui/src/store/quickDeliveryStore.ts b/apps/user-ui/src/store/quickDeliveryStore.ts
index 2f8d9ce..5784c8e 100644
--- a/apps/user-ui/src/store/quickDeliveryStore.ts
+++ b/apps/user-ui/src/store/quickDeliveryStore.ts
@@ -1,10 +1,8 @@
 import { create } from 'zustand';
+import type { QuickDeliveryState as SharedQuickDeliveryState } from '@packages/shared';
 
-interface QuickDeliveryState {
-  isDrawerHidden: boolean;
-  selectedSlotId: number | null;
-  setSelectedSlotId: (slotId: number | null) => void;
-}
+// user-ui only reads/hides the drawer — no setDrawerHidden action here
+type QuickDeliveryState = Omit<SharedQuickDeliveryState, 'setDrawerHidden'>
 
 export const useQuickDeliveryStore = create<QuickDeliveryState>((set) => ({
   isDrawerHidden: false,
diff --git a/apps/user-ui/src/types/auth.ts b/apps/user-ui/src/types/auth.ts
index 5f02fef..8dc69e2 100644
--- a/apps/user-ui/src/types/auth.ts
+++ b/apps/user-ui/src/types/auth.ts
@@ -1,30 +1,20 @@
-export interface User {
-  id: number;
-  name?: string | null;
-  email: string | null;
-  mobile: string | null;
-  profileImage?: string | null;
-  createdAt: string;
-}
+import type { User as SharedUser, UserAuthProfile, AuthStateCore } from '@packages/shared'
 
-export interface UserDetails {
-  id: number;
-  name?: string | null;
-  email: string | null;
-  mobile: string | null;
-  profileImage?: string | null;
-  bio?: string | null;
-  dateOfBirth?: string | null;
-  gender?: string | null;
-  occupation?: string | null;
-}
+// Auth user — serialized view of the shared User (string dates, nullable mobile)
+export type User = Pick<SharedUser, 'id' | 'email'> &
+  Partial<Omit<SharedUser, 'id' | 'email' | 'createdAt' | 'mobile'>> & {
+    mobile: string | null
+    profileImage?: string | null
+    createdAt: string
+  }
 
-export interface AuthState {
+// Profile details — required id/email/mobile, everything else optional
+export type UserDetails = Pick<UserAuthProfile, 'id' | 'email' | 'mobile'> &
+  Partial<Omit<UserAuthProfile, 'id' | 'email' | 'mobile' | 'createdAt'>>
+
+export interface AuthState extends AuthStateCore {
   user: User | null;
   userDetails: UserDetails | null;
-  isAuthenticated: boolean;
-  isLoading: boolean;
-  token: string | null;
 }
 
 import type { LoginRequest, RegisterRequest } from '@packages/shared'
diff --git a/apps/user-ui/src/types/orders.ts b/apps/user-ui/src/types/orders.ts
index 35f88f7..6fb8457 100644
--- a/apps/user-ui/src/types/orders.ts
+++ b/apps/user-ui/src/types/orders.ts
@@ -1,31 +1,15 @@
 // Shared order view-model types for user-ui
 // (Were identically duplicated in me/my-orders/index.tsx and NextOrderGlimpse.tsx)
+import type { UserOrderItemSummary, UserOrderSummary } from '@packages/shared'
 
-export interface OrderItem {
-  productName: string;
-  quantity: number;
-  price: number;
-  amount: number;
-  image: string | null;
-}
+// Order line item = shared summary minus the discounted price column
+export type OrderItem = Pick<
+  UserOrderItemSummary,
+  'productName' | 'quantity' | 'price' | 'amount' | 'image'
+>
 
-export interface Order {
-  id: number;
-  orderId: string;
-  orderDate: string;
-  deliveryStatus: string;
-  deliveryDate?: string;
-  orderStatus: string;
-  cancelReason: string | null;
-  totalAmount: number;
-  deliveryCharge: number;
-  paymentMode: string;
-  paymentStatus: string;
-  refundStatus: string;
-  refundAmount: number | null;
-  userNotes: string | null;
-  items: OrderItem[];
-  discountAmount?: number;
-  isFlashDelivery: boolean;
-  createdAt: string;
+export type Order = Omit<UserOrderSummary, 'deliveryDate' | 'items' | 'discountAmount'> & {
+  deliveryDate?: string
+  items: OrderItem[]
+  discountAmount?: number
 }
diff --git a/apps/web-ui/src/components/Dialog.tsx b/apps/web-ui/src/components/Dialog.tsx
index 639487e..a587ffd 100644
--- a/apps/web-ui/src/components/Dialog.tsx
+++ b/apps/web-ui/src/components/Dialog.tsx
@@ -1,12 +1,6 @@
 import React, { useEffect } from 'react'
 import { X } from 'lucide-react'
-
-interface DialogProps {
-  open: boolean
-  onClose: () => void
-  children: React.ReactNode
-  title?: string
-}
+import type { DialogProps } from '@packages/shared'
 
 export function Dialog({ open, onClose, children, title }: DialogProps) {
   // Close on escape key
diff --git a/apps/web-ui/src/hooks/prominent-api-hooks.ts b/apps/web-ui/src/hooks/prominent-api-hooks.ts
index 8b809fd..b8cdfd5 100644
--- a/apps/web-ui/src/hooks/prominent-api-hooks.ts
+++ b/apps/web-ui/src/hooks/prominent-api-hooks.ts
@@ -2,6 +2,7 @@ import { useMemo, useEffect, useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import axios from 'axios'
 import { trpc } from '../lib/trpc-client'
+import type { ProductPriceFlags } from '@packages/shared'
 import type {
   AllProductsApiType,
   AvailabilityApiType,
@@ -92,14 +93,7 @@ type AvailabilityResponse = AvailabilityApiType
 type BaseProduct = AllProductsApiType['products'][number]
 type AvailabilityEntry = AvailabilityApiType['availability'][number]
 
-export type MergedProduct = BaseProduct & {
-  price: number
-  marketPrice: number | null
-  flashPrice: string | null
-  isFlashAvailable: boolean
-  isOutOfStock: boolean
-  isSuspended: boolean
-}
+export type MergedProduct = BaseProduct & ProductPriceFlags
 
 function useCacheUrl(filename: string): string | null {
   const { data: essentialConsts } = useGetEssentialConsts()
diff --git a/apps/web-ui/src/lib/auth-context.tsx b/apps/web-ui/src/lib/auth-context.tsx
index 1195b6c..1e95cbe 100644
--- a/apps/web-ui/src/lib/auth-context.tsx
+++ b/apps/web-ui/src/lib/auth-context.tsx
@@ -1,22 +1,18 @@
 import React, { createContext, useContext, useState, useEffect, useCallback } from 'react'
 import { trpc } from './trpc-client'
 import { useNavigate } from '@tanstack/react-router'
+import type { User as SharedUser, AuthStateCore } from '@packages/shared'
 
-interface User {
-  id: number
-  name?: string | null | undefined
-  mobile: string | null
-  email: string | null
-  profileImage: string | null
+// Auth user — serialized view of the shared User (optional name, no createdAt)
+type User = Pick<SharedUser, 'id' | 'email'> &
+  Partial<Omit<SharedUser, 'id' | 'email' | 'createdAt' | 'mobile'>> & {
+    mobile: string | null
+    profileImage: string | null
+  }
 
-}
-
-interface AuthState {
+interface AuthState extends AuthStateCore {
   user: User | null
   userDetails: any | null
-  isAuthenticated: boolean
-  isLoading: boolean
-  token: string | null
 }
 
 interface AuthContextType extends AuthState {
diff --git a/apps/web-ui/src/lib/stores/address-store.ts b/apps/web-ui/src/lib/stores/address-store.ts
index e6aa606..64238f6 100644
--- a/apps/web-ui/src/lib/stores/address-store.ts
+++ b/apps/web-ui/src/lib/stores/address-store.ts
@@ -1,10 +1,7 @@
 import { create } from 'zustand'
+import type { AddressSelectionState } from '@packages/shared'
 
-interface AddressState {
-  selectedAddressId: number | null
-  setSelectedAddressId: (addressId: number | null) => void
-  clearSelectedAddress: () => void
-}
+type AddressState = AddressSelectionState & { clearSelectedAddress: () => void }
 
 export const useAddressStore = create<AddressState>((set) => ({
   selectedAddressId: null,
diff --git a/apps/web-ui/src/lib/stores/central-product-store.ts b/apps/web-ui/src/lib/stores/central-product-store.ts
index 6e858e5..e7c9663 100644
--- a/apps/web-ui/src/lib/stores/central-product-store.ts
+++ b/apps/web-ui/src/lib/stores/central-product-store.ts
@@ -1,4 +1,5 @@
 import { create } from 'zustand'
+import type { CentralProductState as CentralProductsState } from '@packages/shared'
 
 interface Product {
   id: number
@@ -14,13 +15,7 @@ interface Product {
   description: string | null
 }
 
-interface CentralProductStore {
-  products: Product[]
-  productsById: Record<number, Product>
-  setProducts: (products: Product[]) => void
-  refetchProducts: (() => void) | null
-  setRefetchProducts: (fn: (() => void) | null) => void
-}
+type CentralProductStore = CentralProductsState<Product>
 
 export const useCentralProductStore = create<CentralProductStore>((set) => ({
   products: [],
diff --git a/apps/web-ui/src/lib/stores/flash-navigation-store.ts b/apps/web-ui/src/lib/stores/flash-navigation-store.ts
index 6b5c0d6..35acfc2 100644
--- a/apps/web-ui/src/lib/stores/flash-navigation-store.ts
+++ b/apps/web-ui/src/lib/stores/flash-navigation-store.ts
@@ -1,9 +1,7 @@
 import { create } from 'zustand'
+import type { FlashNavigationState } from '@packages/shared'
 
-interface FlashNavigationStore {
-  shouldNavigateToCart: boolean
-  setShouldNavigateToCart: (value: boolean) => void
-}
+type FlashNavigationStore = FlashNavigationState
 
 export const useFlashNavigationStore = create<FlashNavigationStore>((set) => ({
   shouldNavigateToCart: false,
diff --git a/apps/web-ui/src/lib/stores/navigation-store.ts b/apps/web-ui/src/lib/stores/navigation-store.ts
index 97675d7..50ff035 100644
--- a/apps/web-ui/src/lib/stores/navigation-store.ts
+++ b/apps/web-ui/src/lib/stores/navigation-store.ts
@@ -1,11 +1,7 @@
 import { create } from 'zustand'
+import type { NavigationState } from '@packages/shared'
 
-interface NavigationStore {
-  isNavigatedFromHome: boolean
-  selectedStoreId: number | null
-  setNavigatedFromHome: (value: boolean) => void
-  setSelectedStoreId: (id: number | null) => void
-}
+type NavigationStore = NavigationState
 
 export const useNavigationStore = create<NavigationStore>((set) => ({
   isNavigatedFromHome: false,
diff --git a/apps/web-ui/src/lib/stores/quick-delivery-store.ts b/apps/web-ui/src/lib/stores/quick-delivery-store.ts
index 845592b..c12aa20 100644
--- a/apps/web-ui/src/lib/stores/quick-delivery-store.ts
+++ b/apps/web-ui/src/lib/stores/quick-delivery-store.ts
@@ -1,11 +1,7 @@
 import { create } from 'zustand'
+import type { QuickDeliveryState } from '@packages/shared'
 
-interface QuickDeliveryStore {
-  isDrawerHidden: boolean
-  selectedSlotId: number | null
-  setDrawerHidden: (hidden: boolean) => void
-  setSelectedSlotId: (id: number | null) => void
-}
+type QuickDeliveryStore = QuickDeliveryState
 
 export const useQuickDeliveryStore = create<QuickDeliveryStore>((set) => ({
   isDrawerHidden: false,
diff --git a/apps/web-ui/src/routes/me.coupons.tsx b/apps/web-ui/src/routes/me.coupons.tsx
index 6c4b624..f3c55a7 100644
--- a/apps/web-ui/src/routes/me.coupons.tsx
+++ b/apps/web-ui/src/routes/me.coupons.tsx
@@ -4,22 +4,19 @@ import { useState } from 'react'
 import { p, MyButton, AppContainer, div } from 'web-components'
 import { Ticket, AlertCircle } from 'lucide-react'
 import dayjs from 'dayjs'
+import type { UserCouponDisplay } from '@packages/shared'
 
 export const Route = createFileRoute('/me/coupons')({ component: CouponsPage })
 
-interface Coupon {
-  id: number
-  code: string
-  discountType: 'percentage' | 'flat'
-  discountValue: number
+// Coupons screen view-model — relaxed optionality over the shared display type
+type Coupon = Omit<
+  UserCouponDisplay,
+  'maxValue' | 'minOrder' | 'validTill' | 'maxLimitForUser'
+> & {
   maxValue?: number
   minOrder?: number
-  description: string
   validTill?: string | Date
-  usageCount: number
   maxLimitForUser?: number
-  isExpired: boolean
-  isUsedUp: boolean
 }
 
 interface CouponCardProps {
diff --git a/change-log.txt b/change-log.txt
index fe3aae5..704610c 100644
--- a/change-log.txt
+++ b/change-log.txt
@@ -1212,3 +1212,207 @@ apps/fallback-ui/src/components/3d/Characters.tsx + 3d/Scene.tsx (c48):
 
 [2026-09-05 12:55:00] COMPLETED type-cluster unification pass (clusters 3,7,8,9,11,12,13,14,17,19,20,21,44,47,48,49,50,51,52,53,54,56 → @packages/shared).
 Verification (tsc --noEmit error counts vs pre-change baselines): backend 11=11, web-ui 150=150, user-ui 106=106, admin-ui 122=122, fallback-ui 107=107, db_helper_sqlite 4=4. Diffs are line-number shifts only (deleted lines) — zero new errors. `apps/web-ui` vite build exit 0. db_helper_postgres: untouched. Remaining same-name locals verified genuinely different shapes (bottom-dropdown/multi-select DropdownOption variants, web-ui Dialog.tsx DialogProps, user-ui floating-cart-bar props) — intentionally left. type-clusters/README.md verdicts updated to ✅ for the resolved clusters with a pass note at top.
+
+================================================================================
+2026-09-05 13:40:00 — IMPLEMENT all 🟢 "unify now" clusters from similar_types.md (29 clusters; 🟡/🟣/⚪/🔵 untouched). db_helper_postgres still excluded. Derived types are shape-EXACT replacements of the locals they replace (verified per-cluster; tsc baselines re-checked after).
+
+packages/shared/types/admin.ts (clusters 8,10,22,23,43,51):
+- import type { UnitSeedData } from './seed.types'  (top import block)
+- AdminRebalanceSlotsResult {success,updatedOrders,message} → extends MessageResponse { updatedOrders: number[] }   (c23)
+- AdminUnit {id,shortNotation,fullName} → extends UnitSeedData { id: number }   (c51)
+- AdminSpecialDeal → NEW `export interface SpecialDealCore { quantity: string; price: string; validTill: Date }` + `AdminSpecialDeal extends SpecialDealCore { id: number; skuId: number }`   (c10)
+- AdminProductReview → NEW `export interface ProductReviewCore { id: number; reviewBody: string; ratings: number; reviewTime: Date; userName: string|null }` + `AdminProductReview extends ProductReviewCore { imageUrls: unknown; adminResponse: string|null; adminResponseImages: unknown }`   (c22)
+- AdminProductGroup {id,groupName,description,createdAt,products,productCount} → extends AdminProductGroupInfo { products: AdminSku[]; productCount: number }   (c8)
+- NEW SkuSummary { id: number; productId: number; productName: string; label: string; images: unknown; storeId: number|null; price: string } (after AdminSlotsProductIdsResult)   (c43)
+
+packages/shared/types/user.ts (clusters 4,10,22,29):
+- './admin' import adds ProductReviewCore, SpecialDealCore; NEW import type { Complaint } from './complaint.types'
+- UserComplaint {6 fields} → type UserComplaint = Pick<Complaint, 'id'|'complaintBody'|'response'|'isResolved'|'createdAt'|'orderId'>   (c29; shape identical)
+- NEW `export interface StoreProductCard { id; name; shortDescription: string|null; price: string; marketPrice: string|null; incrementStep: number; unit: string; unitNotation: string; images: string[]|null; isOutOfStock: boolean; productQuantity: number }` (c4)
+- UserStoreProduct → type UserStoreProduct = Omit<StoreProductCard,'images'> & { images: string[] }   (c4)
+- UserStoreProductData → type UserStoreProductData = StoreProductCard   (c4)
+- UserProductSpecialDeal {quantity,price,validTill} → type UserProductSpecialDeal = SpecialDealCore   (c10)
+- UserProductReview {id,reviewBody,ratings,imageUrls:string[]|null,reviewTime,userName} → interface UserProductReview extends ProductReviewCore { imageUrls: string[] | null }   (c22)
+
+packages/shared/types/store.types.ts (clusters 47,48):
+- + import type { IdName } from './primitives.types'; + import type { UserTagSummary } from './user' (type-only cycle, erased)
+- StoreSummary {id,name,description} → interface StoreSummary extends IdName { description: string | null }   (c47)
+- StoreTag {id,tagName,productIds?} → type StoreTag = Pick<UserTagSummary,'id'|'tagName'> & { productIds?: number[] }   (c48; productIds stays OPTIONAL)
+
+packages/shared/types/app-common.types.ts (clusters 19,26,28,34,37,42):
++ AuthStateCore { isAuthenticated: boolean; isLoading: boolean; token: string | null }                              (c26)
++ AddressSelectionState { selectedAddressId: number|null; setSelectedAddressId: (addressId: number|null) => void }   (c19)
++ NavigationState { isNavigatedFromHome: boolean; selectedStoreId: number|null; setNavigatedFromHome(value); setSelectedStoreId(id: number|null) }   (c37)
++ FlashNavigationState { shouldNavigateToCart: boolean; setShouldNavigateToCart(value) }                             (c34)
++ QuickDeliveryState { isDrawerHidden: boolean; selectedSlotId: number|null; setDrawerHidden(hidden); setSelectedSlotId(id: number|null) }   (c42)
++ CentralProductState<Product = unknown> { products: Product[]; productsById: Record<number,Product>; refetchProducts: (() => void | Promise<void>) | null; setProducts(products); setRefetchProducts(refetch) }   (c28; refetch union accepts void AND Promise<void> to cover both apps)
+
+packages/shared/types/index.ts: app-common comment line updated to list new types.
+
+packages/db_helper_sqlite/src/stores/store-helpers.ts (c10):
+- SpecialDealData {skuId,quantity,price,validTill} → interface SpecialDealData extends SpecialDealCore { skuId: number } (SpecialDealCore added to existing @packages/shared import; index.ts:318 re-export unaffected)
+
+packages/db_helper_sqlite/src/user-apis/product.ts (c43):
+- SkuSummary {7 fields} → import type { SkuSummary } from '@packages/shared' + export type { SkuSummary } (module export surface kept; getAllSkusSummary signature unchanged)
+
+apps/admin-ui:
+- dashboard-banners/index.tsx (c6): interface Banner → type Banner = Omit<SharedBanner,'createdAt'|'lastUpdated'> & { createdAt: string; lastUpdated: string }
+- dashboard-banners/edit/[id].tsx (c6): interface Banner → Omit<SharedBanner,'description'|'skuIds'|'redirectUrl'|'serialNum'|'createdAt'|'lastUpdated'> & { description?; skuIds?; redirectUrl?; serialNum: number; createdAt: string; lastUpdated: string }
+- components/ProductGroupForm.tsx (c8): ProductGroup → Omit<AdminProductGroup,'createdAt'|'products'> & { createdAt: string; products: any[] }
+- manage-orders/orders/index.tsx (c20): OrderType → Omit<AdminOrderListItem,'customerName'|'customerMobile'|'items'|'createdAt'|'adminNotes'|'userNotes'|'userNegativityScore'> & { customerName: string|null; customerMobile?: string|null; items: OrderItemRow[]; createdAt: string; adminNotes?; userNotes?; userNegativityScore?; couponCode?; couponDescription?; discountAmount? } where OrderItemRow = Omit<AdminOrderListItemProduct,'id'|'skuName'|'features'|'isPackaged'|'isPackageVerified'> & { id?: number; isPackaged?: boolean; isPackageVerified?: boolean }
+- components/SnippetOrdersView.tsx (c11+24): OrderProduct → Pick<AdminVendorSnippetOrderProduct,'productId'|'productName'|'quantity'|'price'|'unit'|'subtotal'>; SnippetOrder → Omit<AdminVendorSnippetOrderSummary,'totalAmount'|'slotInfo'|'products'> & { totalAmount: string; slotInfo: { time: string; sequence: any[] } | null; products: OrderProduct[] }
+- components/StoreForm.tsx (c14): StoreFormData → Omit<CreateStoreInput,'description'> & { description: string; products: number[] }
+- components/ProductsSelector.tsx (c43): SkuSummary → Omit<SharedSkuSummary,'images'>
+- send-notifications/index.tsx (c55): User → Omit<UserMiniInfo,'name'> & { name: string|null; isEligibleForNotif: boolean }
+- NEW types/drag-order-item.ts (c16): export interface DragOrderItemProps<T> { item: T; drag: () => void; isActive: boolean }
+- customize-app/all-items-order.tsx (c16): ProductItemProps deleted → React.FC<DragOrderItemProps<Product>>
+- customize-app/popular-items.tsx (c16+c4): ProductItemProps → interface extends DragOrderItemProps<PopularProduct> { onDelete: (id:number)=>void }; PopularProduct → Omit<StoreProductCard,'price'|'marketPrice'|'unitNotation'|'images'> & { price: number; marketPrice: number|null; images: string[]; storeId: number|null; nextDeliveryDate: string|null }
+- product-tags/order.tsx (c16): TagItemProps deleted → React.FC<DragOrderItemProps<Tag>>
+
+apps/user-ui:
+- src/types/auth.ts (c17+53+26): User → Pick<SharedUser,'id'|'email'> & Partial<Omit<SharedUser,'id'|'email'|'createdAt'>> & { mobile: string|null; profileImage?: string|null; createdAt: string }; UserDetails → Pick<UserAuthProfile,'id'|'email'|'mobile'> & Partial<Omit<UserAuthProfile,'id'|'email'|'mobile'|'createdAt'>>; AuthState → interface extends AuthStateCore { user: User|null; userDetails: UserDetails|null }
+- src/store/addressStore.ts (c19): interface AddressState deleted → create<AddressSelectionState>
+- src/store/navigationStore.ts (c37): interface NavigationState deleted → create<NavigationState> (imported from shared)
+- components/stores/flashNavigationStore.ts (c34): → type FlashNavigationState = FlashNavigationState (shared) & { reset: () => void }
+- src/store/quickDeliveryStore.ts (c42): → type QuickDeliveryState = Omit<QuickDeliveryState(shared),'setDrawerHidden'> (user-ui store has no setDrawerHidden action)
+- src/store/centralProductStore.ts (c28): interface CentralProductState → type CentralProductState = CentralProductState<Product> (shared generic; local Product = MergedProduct)
+- hooks/cart-query-hooks.tsx (c36): interface LocalCartItem → type LocalCartItem = Omit<CartItem,'subtotal'>
+- src/types/orders.ts (c56+57): OrderItem → Pick<UserOrderItemSummary,'productName'|'quantity'|'price'|'amount'|'image'>; Order → Omit<UserOrderSummary,'deliveryDate'|'items'|'discountAmount'> & { deliveryDate?: string; items: OrderItem[]; discountAmount?: number }
+
+apps/web-ui:
+- src/lib/auth-context.tsx (c17+26): User → Pick<SharedUser,'id'|'email'> & Partial<Omit<SharedUser,'id'|'email'|'createdAt'>> & { mobile: string|null; profileImage: string|null }; AuthState → interface extends AuthStateCore { user: User|null; userDetails: any }
+- src/lib/stores/address-store.ts (c19): → type AddressState = AddressSelectionState & { clearSelectedAddress: () => void }
+- src/lib/stores/navigation-store.ts (c37): interface NavigationStore → type NavigationStore = NavigationState (shared)
+- src/lib/stores/flash-navigation-store.ts (c34): → type FlashNavigationStore = FlashNavigationState (shared)
+- src/lib/stores/quick-delivery-store.ts (c42): → type QuickDeliveryStore = QuickDeliveryState (shared)
+- src/lib/stores/central-product-store.ts (c28): interface CentralProductStore → type CentralProductStore = CentralProductState<Product> (shared generic, local Product)
+- src/routes/me.coupons.tsx (c54): Coupon → Omit<UserCouponDisplay,'maxValue'|'minOrder'|'validTill'|'maxLimitForUser'> & { maxValue?: number; minOrder?: number; validTill?: string | Date; maxLimitForUser?: number }
+
+[2026-09-05 14:05:00] COMPLETED all 29 🟢 "unify now" clusters from similar_types.md (clusters 4,6,8,10,11,14,16,17,19,20,22,23,24,26,28,29,34,36,37,42,43,47,48,51,53,54,55,56,57). 33 files touched (5 shared, 12 admin-ui incl. 1 new types/drag-order-item.ts, 8 user-ui, 7 web-ui, 2 db_helper_sqlite). Every replacement is shape-exact vs the local it replaced. One derivation fix during verification: user/web auth `User` originally intersected `Partial<Omit<SharedUser,...>>` with `{mobile: string|null}` — object intersection collapsed mobile to `string`; fixed by excluding 'mobile' from the Omit and overriding it directly.
+Verification (tsc --noEmit error counts vs pre-change state): backend 11=11, web-ui 150=150, user-ui 106=106 (login.tsx lost 2 pre-existing errors, AuthContext regained symmetric — net 0), admin-ui 122=122, fallback-ui 107=107, db_helper_sqlite 4=4. Error-code distributions identical per project (line-shift only). db_helper_postgres: untouched. similar_types.md: 29 clusters marked ✅ done.
+Remaining (documented, not in scope): 🟡 worth-doing (1,5,27,31,32,33,38,45,52,61), 🟣 shared-internal (2,7,21,46), ⚪ optional (25,30,35,39,44,50,59,60), 🔵 schema-bound/intentional (3,9,12,13,15,18,40,41,58).
+
+2026-09-05 14:20:00 — Missed 🟢 cluster 49 (TagFormData ×2 in admin-ui) from the unify-now batch; implementing now so similar_types.md can drop ALL done clusters.
+- apps/admin-ui/app/(drawer)/dashboard/product-tags/edit/index.tsx: local `interface TagFormData {…5 fields, existingImageUrl?}` → `type TagFormData = BaseTagFormData & { existingImageUrl?: string }` importing the canonical TagForm.tsx declaration (name alias import to avoid self-shadowing).
+
+[2026-09-05 14:35:00] Pruned similar_types.md: all 30 implemented 🟢 clusters (29 batch + follow-up 49) removed. File now lists the 31 remaining candidates / 84 types (🟡 10 · 🟣 4 · ⚪ 8 · 🔵 9), original cluster IDs kept for change-log traceability; header, top-recommendations, summary table and counts rewritten. Verified: admin-ui tsc 122 = baseline after cluster-49 fix.
+
+================================================================================
+2026-09-05 15:00:00 — similar_types.md §B cluster 2 (Coupon family): reduce to TWO types — canonical `Coupon` (entity, skuIds) + `CouponFormInput = Omit<Coupon,'id'|'createdAt'>` (single form for create+update; complete data everywhere). Decisions: canonical field skuIds (API zod + admin form + sqlite schema already use it); db_helper_postgres stays UNTOUCHED (its local Create/UpdateCouponInput documented exception); update path sends complete data, helper strips createdBy from the DB write (authorship preserved).
+
+packages/shared/types/coupon.types.ts:
+- drifted Coupon {productIds: number[]|null} → canonical {skuIds: number[]|null} (all other 14 fields identical to admin.ts's shape)
++ export type CouponFormInput = Omit<Coupon, 'id' | 'createdAt'>
+- CouponValidationResult.coupon?: Partial<Coupon> now references the canonical type (verified: no read-side consumers of `.coupon`)
+
+packages/shared/types/admin.ts:
+- local interface Coupon (lines ~16-31) deleted
+- re-export line: export type { Coupon, CouponFormInput, CouponValidationResult, UserMiniInfo } from './coupon.types'  (admin.ts has no other internal Coupon references — verified grep)
+
+packages/db_helper_sqlite/src/admin-apis/coupon.ts:
+- local CreateCouponInput + UpdateCouponInput deleted
+- import adds CouponFormInput (from '@packages/shared')
+- createCouponWithRelations(input: CouponFormInput, ...): insert mapping unchanged (field names match; previously-optional fields now arrive complete; NULL ≡ omitted for the nullable columns)
+- updateCouponWithRelations(id, input: CouponFormInput, ...): const { createdBy: _createdBy, ...updateFields } = input; .set(updateFields) — createdBy stripped from write only
+
+apps/backend/src/trpc/apis/admin-apis/apis/coupon.ts (only caller of both helpers; type-only + payload-completeness changes):
+- create: call object completed — discountPercent/flatDiscount/minOrder/maxValue/maxLimitForUser get `?? null`, validTill `: null` when absent, isInvalidated: false added (DB result identical: all nullable columns; NULL ≡ omitted)
+- update: updateData becomes a COMPLETE CouponFormInput by merging partial `updates` over the existing coupon via getCouponByIdFromDb(id) (already imported) — sent fields win, unsent fields keep current values (exclusiveApply/isInvalidated/createdBy from existing); net DB write identical to today's partial update
+
+db_helper_postgres: untouched (user decision). admin-ui: zero changes (Formik→zod→backend flow untouched).
+
+[2026-09-05 15:20:00] COMPLETED §B cluster 2 (Coupon family → 2 types). 4 files changed: coupon.types.ts (canonical Coupon w/ skuIds + CouponFormInput + CouponValidationResult.coupon re-anchored), admin.ts (local Coupon deleted; combined coupon re-export), sqlite admin-apis/coupon.ts (CouponFormInput signatures; update strips createdBy from write), backend admin coupon router (create sends complete payload incl. isInvalidated: false + nulls; update merges partial updates over existing coupon → complete CouponFormInput; getCouponByIdFromDb fetch added). pg untouched (45 = baseline); admin-ui untouched. Verification (tsc error counts vs pre-change): backend 11=11, web-ui 150=150, user-ui 106=106, admin-ui 122=122, fallback-ui 107=107, sqlite 4=4. similar_types.md: cluster 2 removed → 30 clusters / 78 types remain (🟡 10 · 🟣 3 · ⚪ 8 · 🔵 9).
+
+================================================================================
+2026-09-05 15:40:00 — similar_types.md §B cluster 7 (Admin order item trio, all in shared admin.ts): extract common base, chain with extends; all three names + shapes preserved exactly (contract intact).
+packages/shared/types/admin.ts:
++ NEW `export interface AdminOrderItemCore { id: number; name: string; amount: number; isPackaged: boolean; isPackageVerified: boolean; skuName?: string | null; features?: { featureName: string | null; featureValue: string }[] }` (declared before AdminOrderDetailsItem)
+- AdminOrderDetailsItem: common 7 fields deleted → extends AdminOrderItemCore { quantity: string; price: string; productSize: number; unit?: string }
+- AdminSlotOrderItem: common 7 fields deleted → extends AdminOrderItemCore { quantity: number; price: number; unit: string }
+- AdminOrderListItemProduct: common fields deleted → extends AdminSlotOrderItem { productSize: number }  (Slot/List share numeric quantity+price; List adds productSize)
+Consumers unchanged (backend getOrderDetails / slot-orders / orders-list + admin-ui derivations — shapes byte-equivalent). db_helper_postgres untouched.
+
+[2026-09-05 15:50:00] COMPLETED §B cluster 7 (Admin order item trio). 1 file changed: packages/shared/types/admin.ts — NEW AdminOrderItemCore {id, name, amount, isPackaged, isPackageVerified, skuName?, features?}; AdminOrderDetailsItem extends it {quantity: string; price: string; productSize: number; unit?}; AdminSlotOrderItem extends it {quantity: number; price: number; unit: string}; AdminOrderListItemProduct extends AdminSlotOrderItem {productSize: number}. All names + shapes preserved (contract intact); backend identical tsc output. Verification (tsc error counts vs pre-change): backend 11=11, web-ui 150=150, user-ui 106=106, admin-ui 122=122, fallback-ui 107=107, sqlite 4=4, pg 45=45. similar_types.md: cluster 7 removed → 29 clusters / 75 types remain (🟡 10 · 🟣 2 · ⚪ 8 · 🔵 9).
+
+================================================================================
+2026-09-05 16:00:00 — FULL UNIFICATION PASS (remaining 29 clusters of similar_types.md). User rules: (1) add unneeded fields rather than fragment types, (2) make differing types identical + cast (numbers on inputs/cache; DB rows keep DB strings; images → string[]|null; relatedStores → number[]|null), (3) base types via extends. pg stays untouched → clusters 13/15/40/41 (pure pg↔sqlite pairs) = decided-skips. GROUP 1: packages/shared.
+
+packages/shared/types/admin.ts:
+- (c21) AdminOrderRow {16 fields} → type AdminOrderRow = Omit<PlacedOrder,'orderGroupId'|'orderGroupProportion'> & { adminNotes: string|null; orderGroupId: string|null; orderGroupProportion: string|null }; + import type { PlacedOrder } from './order.types' (shape byte-equal)
+- (c9) NEW SkuFlagCore { name?: string|null; isOutOfStock?; isSuspended?; isFlashAvailable?; isOffer?; isComboOnly?; isDeleted? } (all optional); AdminSku → extends SkuFlagCore re-tightening name: string|null + all 6 flags required (shape unchanged)
+- (c9/31) DEAD types replaced by the live sqlite contracts (verified zero consumers of the old shapes repo-wide):
+  - DELETE CreateSkuVariantInput (dead)
+  - NEW CreateComboItemInput { skuId: number } (was sqlite-local)
+  - CreateSkuInput (dead: skuCode/displayName/unitId/variants…) → live shape extends SkuFlagCore { price: number; marketPrice?: number|null; images?: string[]|null; flashPrice?: number|null; features: SkuFeatureLike[]; comboItems?: CreateComboItemInput[] }
+  - CreateProductInput (dead: storeId: number, no productType) → live shape { name: string; shortDescription?: string|null; longDescription?: string|null; storeId: number|null; incrementStep?: number; productType?: 'item'|'combo'; skus: CreateSkuInput[] }
+- (c1) NEW ProductTagCore { tagName: string; tagDescription: string|null; imageUrl: string|null; isDashboardTag: boolean; relatedStores: number[]|null }; AdminProductTagInfo → extends ProductTagCore { id; sortOrder: number[]; createdAt: Date } (relatedStores unknown → number[]|null)
+- (c5) AdminVendorSnippetCreateInput + AdminVendorSnippetUpdateInput (both dead, verified) → single export type AdminVendorSnippetInput = Omit<AdminVendorSnippet,'id'|'createdAt'>; dbService.ts re-export list updated (2 lines → 1)
+
+packages/shared/types/staff-user.types.ts (c46):
+- local StaffUser (staffRoleId: number, non-null — unreachable duplicate; barrel only exports StaffRole from this file) deleted → single source = admin.ts StaffUser (staffRoleId: number|null)
+
+packages/shared/types/user.ts (c12/18/38/59/61/3):
+- (c12) NEW ProductPriceFlags { price: number; marketPrice: number|null; flashPrice: string|null; isFlashAvailable: boolean; isOutOfStock: boolean; isSuspended: boolean } — MergedProduct (both apps) and sqlite AvailabilityCacheData anchor here
+- (c18) NEW ProductDetailCore { id; productId; name; shortDescription: string|null; longDescription: string|null; price: string; marketPrice: string|null; unitNotation: string; images: string[]|null; isOutOfStock: boolean; incrementStep: number; productQuantity: number; isFlashAvailable: boolean; flashPrice: string|null; productType: string; isOffer?: boolean; isComboOnly?: boolean }; UserProductDetailData → extends ProductDetailCore { store: UserProductStoreInfo|null; deliverySlots: UserProductDeliverySlot[]; specialDeals: UserProductSpecialDeal[]; comboItems: UserProductComboItem[] } (isOffer/isComboOnly gained optional — rule 1)
+- (c38) NEW ProductSummaryCore { id; name; price: string; marketPrice: string|null; unitNotation: string; images: string[]|null; isOutOfStock: boolean; incrementStep: number }
+- (c59) UserSlotsWithProductsResponse → extends UserSlotsResponse { productAvailability: UserSlotAvailability[] }
+- (c61) NEW UserStoreSampleProductCore<I> { id: number; images: I } + UserStoreSummaryCore<P> { id; name; description: string|null; productCount: number; sampleProducts: P[] }; UserStoreSampleProduct = Core<{signedImageUrl: string|null}>; UserStoreSampleProductData = Core<{images: string[]|null}>; UserStoreSummary extends SummaryCore<UserStoreSampleProduct> { signedImageUrl: string|null }; UserStoreSummaryData extends SummaryCore<UserStoreSampleProductData> { imageUrl: string|null }
+- (c3) UserSlotWithProducts → extends UserProductDeliverySlot { products: UserSlotProduct[] }
+
+packages/shared/types/app-common.types.ts (c25/30/39):
++ OrderDialogBaseProps { open: boolean; onClose: () => void; orderId: number }; ComplaintFormProps → extends it
++ AuthRedirectOptions { targetUrl: string; queryParams: Record<string, any> }
++ OrderCardActionProps<T> { order: T; onPress: () => void }
+
+GROUP 2 (2026-09-05 16:10) — sqlite helpers + slots adopt shared bases (clusters 1,3,9,12,18,31,38,45,58):
+
+packages/db_helper_sqlite/src/stores/store-helpers.ts:
+- (c18) ProductBasicData {20 fields} → extends ProductDetailCore (shared) { skuName: string|null; storeId: number|null } + re-tightens isOffer/isComboOnly to required; images unknown → string[]|null via core; producer (getAllProductsForCache:129) images: sku.images → cast `as string[] | null`
+- (c12) AvailabilityCacheData {7 fields} → extends ProductPriceFlags { id: number }; producer getAvailabilityForCache now writes NUMBERS: price: Number(stat.ourPrice ?? 0), marketPrice: stat.marketPrice != null ? Number(stat.marketPrice) : null, flashPrice unchanged string|null; downstream apps already Number()-cast (verified user-ui:143-144, web-ui:181-182) — no app changes
+- (c58) ProductComboCacheData {8 fields} → extends UserProductComboItem { comboSkuId: number }; producer (getAllProductCombosForCache:242) images: ci.sku?.images → cast `as string[] | null`
+- (c1) TagBasicData {7 fields} → extends ProductTagCore { id: number; sortOrder: number[] | null }; producer (:272) relatedStores: productTagInfo.relatedStores → cast `as number[] | null`
+- (c3) DeliverySlotData {5 fields} → extends UserProductDeliverySlot { isCapacityFull: boolean; skuId: number }; SlotWithProductsData → extends UserProductDeliverySlot { isActive: boolean; isCapacityFull: boolean; products: Array<{…same inline…}> }; import adds UserProductDeliverySlot
+
+packages/db_helper_sqlite/src/admin-apis/product.ts (c9/31/38):
+- local CreateComboItemInput / CreateSkuInput / CreateProductInput deleted → imported from '@packages/shared' (createProduct's ?? null / ?? 'item' defaults unchanged)
+- (c38) OffersPageProductData {8 fields} → extends ProductSummaryCore; producer mapOffersPageProduct images cast `as string[] | null`
+
+packages/db_helper_sqlite/src/admin-apis/slots.ts (c45):
+- local SlotSnippetInput {name, skuIds, validTill} deleted → import shared SlotSnippetInput {name; groupIds: number[]; skuIds: number[]; validTill: string} (groupIds unused in sqlite — rule 1)
+
+packages/db_helper_postgres/src/admin-apis/product.ts: UNTOUCHED (pg-side tag input/sortOrder drift remains the documented exception).
+
+GROUP 3 (2026-09-05 16:25) — component prop families (clusters 27, 33, 35):
+packages/ui/src/components/dropdown.tsx (c27): NEW exported DropdownBaseProps { label: string; options: DropdownOption[]; error?: boolean; style?: any; placeholder?: string; disabled?: boolean; className?: string } (the truly common scaffold — value/onValueChange intentionally excluded because the two dropdowns declare incompatible value widths: string|number vs string|number|string[]|number[]); Props → extends DropdownBaseProps { value; onValueChange }
+packages/ui/src/components/bottom-dropdown.tsx (c27+33): DropdownOption → interface extends shared DropdownOption (import alias BaseDropdownOption) + disabled?: boolean (public export kept); BottomDropdownProps → extends DropdownBaseProps + topLabel/value(wide)/onValueChange(wide)/multiple/triggerComponent/onSearch/testID
+packages/web-components/src/components/image-gallery-with-delete.tsx (c35): ImageGalleryWithDeleteProps → extends ImageCarouselProps { onRemove: (uri: string) => void }
+
+GROUP 4 (2026-09-05 16:35) — apps adopt the shared bases (clusters 12, 32, 38, 39, 44, 45, 50, 52, 60) + admin-ui ProductForm unification (cluster 9):
+
+apps/user-ui/src/hooks/prominent-api-hooks.ts (c12): MergedProduct → BaseProduct & ProductPriceFlags & { isComboOnly?: boolean } (shared ProductPriceFlags imported; fields identical)
+apps/web-ui/src/hooks/prominent-api-hooks.ts (c12): MergedProduct → BaseProduct & ProductPriceFlags
+apps/user-ui/app/(drawer)/(tabs)/me/addresses/index.tsx (c52): local Address {12 fields} → type Address = Pick<UserAddress, 'id'|'name'|'phone'|'addressLine1'|'addressLine2'|'city'|'state'|'pincode'|'isDefault'|'latitude'|'longitude'|'googleMapsUrl'>
+apps/user-ui/hooks/cart-query-hooks.tsx (c38): ProductSummary → extends ProductSummaryCore { isFlashAvailable: boolean; flashPrice: string|null; productQuantity: number } (images string[] → string[]|null via core)
+apps/user-ui/components/NextOrderGlimpse.tsx (c39): OrderCardProps → extends OrderCardActionProps<Order> { supportMobile: string|null }
+apps/admin-ui/app/(drawer)/dashboard/user-management/[id].tsx (c39): OrderItemProps → extends OrderCardActionProps<Order>
+apps/user-ui/components/SlotSpecificView.tsx (c44): SlotLayoutProps → extends SlotProductsProps { isForFlashDelivery: boolean }
+apps/user-ui/app/(drawer)/(tabs)/home/index.tsx (c50): ListHeaderProps → extends TagSceneProps { onSelectTag: (id:number)=>void; storesData: any; sortedSlots: any[] }
+apps/web-ui/src/components/Dialog.tsx (c32): local DialogProps deleted → import shared DialogProps (now carries title?)
+apps/admin-ui/app/(drawer)/dashboard/product-tags/order.tsx (c1): TagItemData? no — admin-ui TagItemData lives in product-tags/index.tsx → extends ProductTagCore { id; createdAt: string|Date }
+apps/admin-ui/app/(drawer)/dashboard/customize-app/all-items-order.tsx (c60): Product → Pick<StoreProductCard,'id'|'name'|'images'|'isOutOfStock'> (images string[] → string[]|null)
+apps/admin-ui/components/SlotForm.tsx (c45): local VendorSnippet → type VendorSnippet = SlotSnippetInput (shared; validTill string → string|null)
+apps/admin-ui/src/components/ProductForm.tsx + products/add.tsx + products/edit.tsx (c9): Variant → Omit<CreateSkuInput,'features'|'comboItems'|'flashPrice'|'marketPrice'|'name'> & { name: string; marketPrice: number; flashPrice: number|null; features: Attribute[]; comboItems: CreateComboItemInput[] }; attributes→features rename across the form; price/marketPrice/flashPrice become numbers (TextInput display casts via String(... ?? ''), combo picker pushes {skuId: 0} + Number(val) on select); add/edit screens drop their parseFloat boundary casts (values already numeric)
+
+[2026-09-05 17:30:00] COMPLETED the FINAL unification pass — all 25 remaining actionable clusters (1,3,5,9,12,18,21,25,27,30,31,32,33,35,38,39,44,45,46,50,52,58,59,60,61). ~30 files across shared/admin.ts+user.ts+app-common, sqlite helpers/product/slots, backend (slot-store, product-store, product-tag-store, admin coupon/slots/product trpc), packages/ui (dropdowns), web-components, user-ui, web-ui, admin-ui (incl. ProductForm numeric/features unification). Notable standardizations per user rules: availability cache now writes NUMERIC prices (apps already Number()-cast — zero app changes); SKU/form prices numeric end-to-end (ProductForm casts at display, add/edit drop parseFloat); form field attributes→features renamed; images → string[]|null everywhere; relatedStores → number[]|null (trpc getProductTags annotation updated); vendor-snippet input single-sourced with wire (string) validTill; SlotSnippetInput shared with groupIds (unused in sqlite); dead shared CreateProductInput/CreateSkuInput/CreateSkuVariantInput/AdminVendorSnippet{Create,Update}Input/staff-user StaffUser deleted and replaced by live-shape single sources. Decided-skips (13,15,40,41) documented in similar_types.md (4 clusters / 8+1 detail remain — 13, 15, 40, 41).
+FINAL VERIFICATION (tsc error counts vs baselines): backend 11=11, admin-ui 122=122, user-ui 106=106, web-ui 150=150, fallback-ui 107=107, db_helper_sqlite 4=4, db_helper_postgres 45=45. All diffs are line-number/message-render shifts of pre-existing errors only.
+
+================================================================================
+2026-09-05 17:45:00 — Add root typecheck script (runs every package/app with a tsconfig).
+
+[NEW FILE] ./typecheck (executable bash): iterates apps/backend, apps/user-ui, apps/admin-ui, apps/web-ui, apps/fallback-ui, packages/db_helper_sqlite, packages/db_helper_postgres, packages/migrator, packages/web-components — runs `npx tsc --noEmit` per target, prints ✅/❌ with error counts, prints first errors on failure, exits non-zero if any target fails. Targets without a tsconfig (packages/shared, packages/ui) are typechecked transitively via consumers.
+
+packages/web-components/tsconfig.json:
+- removed "declaration": true, "declarationMap": true, "outDir": "./dist", "rootDir": "./src" — the package is consumed as source (main: ./src/index.ts) and never emitted standalone; with the unified @packages/shared type imports now in its sources, declaration emit forced TS6059 rootDir violations (all 21 standalone errors were exactly this). Checking-only tsconfig → 0 errors.
+
+package.json (root): + "typecheck": "bash typecheck"
+[2026-09-05 17:55:00] VERIFIED ./typecheck: all 9 targets report exactly their known baselines — backend 11, user-ui 106, admin-ui 122, web-ui 150, fallback-ui 107, db_helper_sqlite 4, db_helper_postgres 45, migrator 0 ✅, web-components 3 (the pre-existing `<p weight>` custom-prop errors; standalone count went 21 → 3 after removing the declaration-emit settings). Script exits 1 while any target fails; run via `./typecheck` or `npm run typecheck` / `bun run typecheck`.
diff --git a/package.json b/package.json
index 30ae199..6594969 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "build": "turbo run build",
     "dev": "turbo run dev --parallel",
     "lint": "turbo run lint",
+    "typecheck": "bash typecheck",
     "test": "turbo run test",
     "web-ui": "bun run --filter web-ui",
     "web-ui:dev": "bun run web-ui dev",
diff --git a/packages/db_helper_sqlite/src/admin-apis/coupon.ts b/packages/db_helper_sqlite/src/admin-apis/coupon.ts
index 1c2a596..d92a0ec 100644
--- a/packages/db_helper_sqlite/src/admin-apis/coupon.ts
+++ b/packages/db_helper_sqlite/src/admin-apis/coupon.ts
@@ -1,7 +1,7 @@
 import { db } from '../db/db_index'
 import { coupons, reservedCoupons, users, orders, orderStatus, couponApplicableUsers, couponApplicableProducts } from '../db/schema'
 import { eq, and, like, or, inArray, lt, desc, asc } from 'drizzle-orm'
-import type { Coupon, CouponValidationResult, UserMiniInfo } from '@packages/shared'
+import type { Coupon, CouponFormInput, CouponValidationResult, UserMiniInfo } from '@packages/shared'
 
 export async function getAllCoupons(
   cursor?: number,
@@ -71,23 +71,8 @@ export async function getCouponById(id: number): Promise<any | null> {
   })
 }
 
-export interface CreateCouponInput {
-  couponCode: string
-  isUserBased: boolean
-  discountPercent?: string
-  flatDiscount?: string
-  minOrder?: string
-  skuIds?: number[] | null
-  maxValue?: string
-  isApplyForAll: boolean
-  validTill?: Date
-  maxLimitForUser?: number
-  exclusiveApply: boolean
-  createdBy: number
-}
-
 export async function createCouponWithRelations(
-  input: CreateCouponInput,
+  input: CouponFormInput,
   applicableUsers?: number[],
   applicableProducts?: number[]
 ): Promise<Coupon> {
@@ -129,31 +114,19 @@ export async function createCouponWithRelations(
   })
 }
 
-export interface UpdateCouponInput {
-  couponCode?: string
-  isUserBased?: boolean
-  discountPercent?: string
-  flatDiscount?: string
-  minOrder?: string
-  skuIds?: number[] | null
-  maxValue?: string
-  isApplyForAll?: boolean
-  validTill?: Date | null
-  maxLimitForUser?: number
-  exclusiveApply?: boolean
-  isInvalidated?: boolean
-}
-
 export async function updateCouponWithRelations(
   id: number,
-  input: UpdateCouponInput,
+  input: CouponFormInput,
   applicableUsers?: number[],
   applicableProducts?: number[]
 ): Promise<Coupon> {
   return await db.transaction(async (tx) => {
+    // createdBy is always sent (complete payload) but never rewritten on update
+    const { createdBy: _createdBy, ...updateFields } = input
+
     const [coupon] = await tx.update(coupons)
       .set({
-        ...input,
+        ...updateFields,
       })
       .where(eq(coupons.id, id))
       .returning()
diff --git a/packages/db_helper_sqlite/src/admin-apis/product.ts b/packages/db_helper_sqlite/src/admin-apis/product.ts
index 447fd29..4a7bcb4 100644
--- a/packages/db_helper_sqlite/src/admin-apis/product.ts
+++ b/packages/db_helper_sqlite/src/admin-apis/product.ts
@@ -58,6 +58,10 @@ import type {
   AdminSpecialDeal,
   AdminUnit,
   AdminUpdateSlotProductsResult,
+  CreateComboItemInput,
+  CreateProductInput,
+  CreateSkuInput,
+  ProductTagCore,
   SkuFeatureLike,
   Store,
 } from '@packages/shared'
@@ -66,36 +70,6 @@ type ProductRow = InferSelectModel<typeof productInfo>
 type SkuRow = InferSelectModel<typeof productSkus>
 type MarketStatsRow = InferSelectModel<typeof productMarketStats>
 type SkuFeatureRow = InferSelectModel<typeof skuFeatures>
-
-interface CreateComboItemInput {
-  skuId: number
-}
-
-interface CreateSkuInput {
-  name?: string | null
-  price: number
-  marketPrice?: number | null
-  images?: string[] | null
-  isFlashAvailable?: boolean
-  flashPrice?: number | null
-  isOutOfStock?: boolean
-  isSuspended?: boolean
-  isOffer?: boolean
-  isComboOnly?: boolean
-  isDeleted?: boolean
-  features: SkuFeatureLike[]
-  comboItems?: CreateComboItemInput[]
-}
-
-interface CreateProductInput {
-  name: string
-  shortDescription?: string | null
-  longDescription?: string | null
-  storeId?: number | null
-  incrementStep?: number
-  productType?: 'item' | 'combo'
-  skus: CreateSkuInput[]
-}
 type StoreRow = InferSelectModel<typeof storeInfo>
 type SpecialDealRow = InferSelectModel<typeof specialDeals>
 type ProductTagInfoRow = InferSelectModel<typeof productTagInfo>
@@ -677,12 +651,7 @@ export async function getProductTagInfoById(tagId: number): Promise<AdminProduct
   return mapTagInfo(tag)
 }
 
-export interface CreateProductTagInput {
-  tagName: string
-  tagDescription?: string | null
-  imageUrl?: string | null
-  isDashboardTag?: boolean
-  relatedStores?: number[]
+export interface CreateProductTagInput extends ProductTagCore {
   sortOrder?: number[]
 }
 
@@ -733,12 +702,8 @@ export async function getProductTagById(tagId: number): Promise<AdminProductTagW
   }
 }
 
-export interface UpdateProductTagInput {
+export type UpdateProductTagInput = Omit<ProductTagCore, 'tagName'> & {
   tagName?: string
-  tagDescription?: string | null
-  imageUrl?: string | null
-  isDashboardTag?: boolean
-  relatedStores?: number[]
   sortOrder?: number[]
 }
 
diff --git a/packages/db_helper_sqlite/src/admin-apis/slots.ts b/packages/db_helper_sqlite/src/admin-apis/slots.ts
index 7c56140..9112a06 100644
--- a/packages/db_helper_sqlite/src/admin-apis/slots.ts
+++ b/packages/db_helper_sqlite/src/admin-apis/slots.ts
@@ -20,11 +20,8 @@ import type {
 } from '@packages/shared'
 import { coerceDate } from '../lib/date'
 
-type SlotSnippetInput = {
-  name: string
-  skuIds: number[]
-  validTill?: string
-}
+// Single source in @packages/shared (admin.ts); groupIds unused in sqlite.
+import type { SlotSnippetInput } from '@packages/shared'
 
 const getStringArray = (value: unknown): string[] | null => {
   if (!Array.isArray(value)) return null
diff --git a/packages/db_helper_sqlite/src/stores/store-helpers.ts b/packages/db_helper_sqlite/src/stores/store-helpers.ts
index fe4ca2f..289ac0f 100644
--- a/packages/db_helper_sqlite/src/stores/store-helpers.ts
+++ b/packages/db_helper_sqlite/src/stores/store-helpers.ts
@@ -17,7 +17,7 @@ import {
 } from '../db/schema'
 import { eq, and, gt, sql, isNotNull, asc } from 'drizzle-orm'
 import { composeSkuName, composeUnitNotation } from '../lib/sku-features'
-import type { ProductTagData, TagProductMapping, UserNegativityData, StoreSummary, BannerData } from '@packages/shared'
+import type { ProductTagData, TagProductMapping, UserNegativityData, StoreSummary, BannerData, SpecialDealCore, ProductDetailCore, ProductPriceFlags, ProductTagCore, UserProductDeliverySlot, UserProductComboItem } from '@packages/shared'
 
 // Re-exported so the package index (`export { ... } from './src/stores/store-helpers'`)
 // keeps resolving to the single shared source.
@@ -41,51 +41,24 @@ export async function getAllBannersForCache(): Promise<BannerData[]> {
 // PRODUCT STORE HELPERS
 // ============================================================================
 
-export interface ProductBasicData {
-  id: number
-  productId: number
-  name: string
+export interface ProductBasicData extends ProductDetailCore {
   skuName: string | null
-  shortDescription: string | null
-  longDescription: string | null
-  price: string
-  marketPrice: string | null
-  images: unknown
-  isOutOfStock: boolean
   storeId: number | null
-  unitNotation: string
-  incrementStep: number
-  productQuantity: number
-  isFlashAvailable: boolean
-  flashPrice: string | null
-  productType: string
-  isComboOnly: boolean
   isOffer: boolean
+  isComboOnly: boolean
 }
 
-export interface AvailabilityCacheData {
+export interface AvailabilityCacheData extends ProductPriceFlags {
   id: number
-  price: string
-  marketPrice: string | null
-  flashPrice: string | null
-  isFlashAvailable: boolean
-  isOutOfStock: boolean
-  isSuspended: boolean
 }
 
-export interface DeliverySlotData {
+export interface DeliverySlotData extends UserProductDeliverySlot {
   skuId: number
-  id: number
-  deliveryTime: Date
-  freezeTime: Date
   isCapacityFull: boolean
 }
 
-export interface SpecialDealData {
+export interface SpecialDealData extends SpecialDealCore {
   skuId: number
-  quantity: string
-  price: string
-  validTill: Date
 }
 
 export async function getAllSpecialDealsForCache(): Promise<SpecialDealData[]> {
@@ -129,7 +102,7 @@ export async function getAllProductsForCache(): Promise<ProductBasicData[]> {
       longDescription: sku.product?.longDescription ?? null,
       price: marketStats?.ourPrice ? String(marketStats.ourPrice) : '0',
       marketPrice: marketStats?.marketPrice ? String(marketStats.marketPrice) : null,
-      images: sku.images,
+      images: sku.images as string[] | null,
       isOutOfStock: marketStats?.isOutOfStock ?? false,
       storeId: sku.product?.storeId ?? null,
       unitNotation: composeUnitNotation(features),
@@ -153,8 +126,8 @@ export async function getAvailabilityForCache(): Promise<AvailabilityCacheData[]
     .filter((stat) => !stat.isSuspended && !stat.sku?.isDeleted)
     .map((stat) => ({
       id: stat.skuId,
-      price: stat.ourPrice ? String(stat.ourPrice) : '0',
-      marketPrice: stat.marketPrice ? String(stat.marketPrice) : null,
+      price: Number(stat.ourPrice ?? 0),
+      marketPrice: stat.marketPrice != null ? Number(stat.marketPrice) : null,
       flashPrice: stat.flashPrice ? String(stat.flashPrice) : null,
       isFlashAvailable: stat.isFlashAvailable,
       isOutOfStock: stat.isOutOfStock,
@@ -208,15 +181,8 @@ export async function getAllProductTagsForCache(): Promise<ProductTagData[]> {
 // PRODUCT COMBO STORE HELPERS
 // ============================================================================
 
-export interface ProductComboCacheData {
+export interface ProductComboCacheData extends UserProductComboItem {
   comboSkuId: number
-  skuId: number
-  productName: string
-  skuName: string | null
-  images: unknown
-  unitNotation: string
-  price: string
-  isOffer: boolean
 }
 
 export async function getAllProductCombosForCache(): Promise<ProductComboCacheData[]> {
@@ -242,7 +208,7 @@ export async function getAllProductCombosForCache(): Promise<ProductComboCacheDa
       skuId: ci.skuId,
       productName: composeSkuName(ci.sku?.product?.name ?? 'Unknown', features, ci.sku?.name),
       skuName: ci.sku?.name ?? null,
-      images: ci.sku?.images,
+      images: (ci.sku?.images ?? null) as string[] | null,
       unitNotation: composeUnitNotation(features),
       price: ci.sku?.marketStats?.ourPrice ? String(ci.sku.marketStats.ourPrice) : '0',
       isOffer: ci.sku?.isOffer ?? false,
@@ -254,13 +220,11 @@ export async function getAllProductCombosForCache(): Promise<ProductComboCacheDa
 // PRODUCT TAG STORE HELPERS
 // ============================================================================
 
-export interface TagBasicData {
+export interface TagBasicData extends ProductTagCore {
   id: number
-  tagName: string
   tagDescription: string | null
   imageUrl: string | null
   isDashboardTag: boolean
-  relatedStores: unknown
   sortOrder: number[] | null
 }
 
@@ -291,10 +255,7 @@ export async function getAllTagProductMappings(): Promise<TagProductMapping[]> {
 // SLOT STORE HELPERS
 // ============================================================================
 
-export interface SlotWithProductsData {
-  id: number
-  deliveryTime: Date
-  freezeTime: Date
+export interface SlotWithProductsData extends UserProductDeliverySlot {
   isActive: boolean
   isCapacityFull: boolean
   products: Array<{
@@ -380,7 +341,7 @@ export async function getAllSlotsWithProductsForCache(): Promise<SlotWithProduct
             name: sku.product.store.name, 
             description: sku.product.store.description 
           } : null,
-          images: sku.images,
+          images: sku.images as string[] | null,
           isOutOfStock: marketStats?.isOutOfStock ?? false,
           storeId: sku.product?.storeId ?? null,
           isFlashAvailable: marketStats?.isFlashAvailable ?? false,
diff --git a/packages/db_helper_sqlite/src/user-apis/product.ts b/packages/db_helper_sqlite/src/user-apis/product.ts
index c06c13a..6996273 100644
--- a/packages/db_helper_sqlite/src/user-apis/product.ts
+++ b/packages/db_helper_sqlite/src/user-apis/product.ts
@@ -301,15 +301,9 @@ export async function getNextDeliveryDateWithCapacity(skuId: number): Promise<Da
   return null
 }
 
-export interface SkuSummary {
-  id: number
-  productId: number
-  productName: string
-  label: string
-  images: unknown
-  storeId: number | null
-  price: string
-}
+// Single source in @packages/shared (admin.ts); re-exported for module compat.
+import type { ProductSummaryCore, SkuSummary } from '@packages/shared'
+export type { SkuSummary } from '@packages/shared'
 
 export async function getAllSkusSummary(): Promise<SkuSummary[]> {
   const skus = await db.query.productSkus.findMany({
@@ -339,15 +333,7 @@ export async function getAllSkusSummary(): Promise<SkuSummary[]> {
   })
 }
 
-export interface OffersPageProductData {
-  id: number
-  name: string
-  price: string
-  marketPrice: string | null
-  unitNotation: string
-  images: unknown
-  isOutOfStock: boolean
-  incrementStep: number
+export interface OffersPageProductData extends ProductSummaryCore {
 }
 
 export interface OffersPageData {
@@ -373,7 +359,7 @@ const mapOffersPageProduct = (sku: {
     price: sku.marketStats?.ourPrice ? String(sku.marketStats.ourPrice) : '0',
     marketPrice: sku.marketStats?.marketPrice ? String(sku.marketStats.marketPrice) : null,
     unitNotation: composeUnitNotation(features),
-    images: sku.images,
+    images: (sku.images ?? null) as string[] | null,
     isOutOfStock: sku.marketStats?.isOutOfStock ?? false,
     incrementStep: sku.product?.incrementStep ?? 1,
   }
diff --git a/packages/shared/types/admin.ts b/packages/shared/types/admin.ts
index df008bf..b0ff93b 100644
--- a/packages/shared/types/admin.ts
+++ b/packages/shared/types/admin.ts
@@ -3,33 +3,19 @@
 //  so existing `@packages/shared` consumers keep working from one surface.)
 
 import type { MessageResponse, BasicSuccessResponse, IdName } from './primitives.types'
+import type { UnitSeedData } from './seed.types'
+import type { PlacedOrder } from './order.types'
 export type { Banner } from './banner.types'
 export type { Complaint, ComplaintWithUser } from './complaint.types'
 export type { Constant, ConstantUpdateResult, ConstValueType } from './const.types'
-export type { CouponValidationResult, UserMiniInfo } from './coupon.types'
 export type { StaffRole } from './staff-user.types'
 export type { MessageResponse, IdName } from './primitives.types'
 
-// NOTE: Coupon and StaffUser intentionally keep LOCAL declarations below —
-// the dedicated files drifted (productIds vs skuIds; staffRoleId nullable vs
-// not) and sqlite consumers depend on these exact shapes.
-export interface Coupon {
-  id: number;
-  couponCode: string;
-  isUserBased: boolean;
-  discountPercent: string | null;
-  flatDiscount: string | null;
-  minOrder: string | null;
-  skuIds: number[] | null;
-  maxValue: string | null;
-  isApplyForAll: boolean;
-  validTill: Date | null;
-  maxLimitForUser: number | null;
-  exclusiveApply: boolean;
-  isInvalidated: boolean;
-  createdAt: Date;
-  createdBy: number;
-}
+// NOTE: Coupon + CouponFormInput are single-sourced in coupon.types.ts
+// (canonical skuIds shape); StaffUser intentionally keeps its LOCAL declaration
+// below — the dedicated staff-user.types.ts copy drifted (staffRoleId nullable
+// vs not) and sqlite consumers depend on these exact shapes.
+export type { Coupon, CouponFormInput, CouponValidationResult, UserMiniInfo } from './coupon.types'
 
 export interface StaffUser {
   id: number;
@@ -49,23 +35,12 @@ export interface Store {
   // updatedAt: Date;
 }
 
-export interface AdminOrderRow {
-  id: number;
-  userId: number;
-  addressId: number;
-  slotId: number | null;
-  isCod: boolean;
-  isOnlinePayment: boolean;
-  paymentInfoId: number | null;
-  totalAmount: string;
-  deliveryCharge: string;
-  readableId: number;
-  adminNotes: string | null;
-  userNotes: string | null;
-  orderGroupId: string | null;
-  orderGroupProportion: string | null;
-  isFlashDelivery: boolean;
-  createdAt: Date;
+// Order row — anchored to the shared PlacedOrder shape (single source); the
+// admin variant widens the group fields to nullable and adds adminNotes.
+export type AdminOrderRow = Omit<PlacedOrder, 'orderGroupId' | 'orderGroupProportion'> & {
+  adminNotes: string | null
+  orderGroupId: string | null
+  orderGroupProportion: string | null
 }
 
 export type PaymentStatus = 'pending' | 'success' | 'cod' | 'failed'
@@ -115,13 +90,11 @@ export interface AdminOrderDetailsSlotInfo {
   sequence: unknown;
 }
 
-export interface AdminOrderDetailsItem {
+// Common scaffolding for the three admin order-item views. quantity/price stay
+// per-view (Details: string, Slot/List: number) since they mirror different queries.
+export interface AdminOrderItemCore {
   id: number;
   name: string;
-  quantity: string;
-  productSize: number;
-  price: string;
-  unit?: string;
   amount: number;
   isPackaged: boolean;
   isPackageVerified: boolean;
@@ -129,6 +102,13 @@ export interface AdminOrderDetailsItem {
   features?: { featureName: string | null; featureValue: string }[];
 }
 
+export interface AdminOrderDetailsItem extends AdminOrderItemCore {
+  quantity: string;
+  price: string;
+  productSize: number;
+  unit?: string;
+}
+
 export interface AdminOrderDetailsPayment {
   status: string;
   gateway: string;
@@ -191,17 +171,10 @@ export type AdminOrderMessageResult = MessageResponse
 
 export type AdminOrderBasicResult = BasicSuccessResponse
 
-export interface AdminSlotOrderItem {
-  id: number;
-  name: string;
+export interface AdminSlotOrderItem extends AdminOrderItemCore {
   quantity: number;
   price: number;
-  amount: number;
   unit: string;
-  isPackaged: boolean;
-  isPackageVerified: boolean;
-  skuName?: string | null;
-  features?: { featureName: string | null; featureValue: string }[];
 }
 
 export interface AdminSlotOrder {
@@ -231,18 +204,8 @@ export interface AdminGetSlotOrdersResult {
   data: AdminSlotOrder[];
 }
 
-export interface AdminOrderListItemProduct {
-  id: number;
-  name: string;
-  quantity: number;
-  price: number;
-  amount: number;
-  unit: string;
+export interface AdminOrderListItemProduct extends AdminSlotOrderItem {
   productSize: number;
-  isPackaged: boolean;
-  isPackageVerified: boolean;
-  skuName?: string | null;
-  features?: { featureName: string | null; featureValue: string }[];
 }
 
 export interface AdminOrderListItem {
@@ -284,10 +247,8 @@ export interface AdminGetAllOrdersResultWithUserId {
   nextCursor?: number;
 }
 
-export interface AdminRebalanceSlotsResult {
-  success: boolean;
+export interface AdminRebalanceSlotsResult extends MessageResponse {
   updatedOrders: number[];
-  message: string;
 }
 
 export type AdminCancelOrderError =
@@ -304,10 +265,8 @@ export interface AdminCancelOrderResult {
   error?: AdminCancelOrderError;
 }
 
-export interface AdminUnit {
+export interface AdminUnit extends UnitSeedData {
   id: number;
-  shortNotation: string;
-  fullName: string;
 }
 
 export interface AdminSkuFeature {
@@ -333,7 +292,19 @@ export interface AdminProductComboItem {
   price: string;
 }
 
-export interface AdminSku {
+// Flag scaffold shared by the SKU row (AdminSku), the insert input
+// (CreateSkuInput) and the admin product-form variant state.
+export interface SkuFlagCore {
+  name?: string | null
+  isOutOfStock?: boolean
+  isSuspended?: boolean
+  isFlashAvailable?: boolean
+  isOffer?: boolean
+  isComboOnly?: boolean
+  isDeleted?: boolean
+}
+
+export interface AdminSku extends SkuFlagCore {
   id: number
   productId: number
   name: string | null
@@ -369,50 +340,46 @@ export interface AdminProductWithRelations extends AdminProduct {
   skus: AdminSku[];
 }
 
-export interface CreateSkuVariantInput {
-  name: string
-  value: string
-  unitId?: number | null
-  sortOrder?: number
+export interface CreateComboItemInput {
+  skuId: number
 }
 
-export interface CreateSkuInput {
-  skuCode?: string | null
-  displayName: string
-  unitId: number
-  productQuantity?: number
-  incrementStep?: number
-  price: number | string
-  marketPrice?: number | string | null
+export interface CreateSkuInput extends SkuFlagCore {
+  price: number
+  marketPrice?: number | null
   images?: string[] | null
-  isOutOfStock?: boolean
-  isSuspended?: boolean
-  isDeleted?: boolean
-  isFlashAvailable?: boolean
-  flashPrice?: number | string | null
-  isOffer?: boolean
-  isComboOnly?: boolean
-  sortOrder?: number
-  isDefault?: boolean
-  variants?: CreateSkuVariantInput[]
+  flashPrice?: number | null
+  features: SkuFeatureLike[]
+  comboItems?: CreateComboItemInput[]
 }
 
 export interface CreateProductInput {
   name: string
   shortDescription?: string | null
   longDescription?: string | null
-  storeId: number
+  storeId: number | null
   incrementStep?: number
+  productType?: 'item' | 'combo'
   skus: CreateSkuInput[]
 }
 
-export interface AdminProductTagInfo {
+// Tag core — shared by the cache row (TagBasicData), the create/update inputs,
+// the admin tag-info row, the backend store tag and the admin-ui list item.
+// Non-key fields are optional here; row-shaped variants re-tighten them.
+export interface ProductTagCore {
+  tagName: string
+  tagDescription?: string | null
+  imageUrl?: string | null
+  isDashboardTag?: boolean
+  relatedStores?: number[] | null
+}
+
+export interface AdminProductTagInfo extends ProductTagCore {
   id: number;
-  tagName: string;
   tagDescription: string | null;
   imageUrl: string | null;
   isDashboardTag: boolean;
-  relatedStores: unknown;
+  relatedStores: number[] | null;
   sortOrder: number[];
   createdAt: Date;
 }
@@ -429,14 +396,19 @@ export interface AdminProductTagWithProducts extends AdminProductTagInfo {
   productIds: number[];
 }
 
-export interface AdminSpecialDeal {
-  id: number;
-  skuId: number;
+// Special-deal chain — UserProductSpecialDeal (user.ts) and sqlite SpecialDealData
+// extend this core; AdminSpecialDeal adds the row fields.
+export interface SpecialDealCore {
   quantity: string;
   price: string;
   validTill: Date;
 }
 
+export interface AdminSpecialDeal extends SpecialDealCore {
+  id: number;
+  skuId: number;
+}
+
 export interface AdminProductWithDetails extends AdminProduct {
   store: Store | null;
   skus: AdminSku[];
@@ -465,15 +437,32 @@ export interface AdminUpdateSlotProductsResult {
 
 export type AdminSlotsProductIdsResult = Record<number, number[]>;
 
-export interface AdminProductReview {
+// SKU summary row — sqlite user-apis product.ts + admin-ui ProductsSelector
+// single source (admin-ui drops images; the helper keeps it unknown).
+export interface SkuSummary {
+  id: number;
+  productId: number;
+  productName: string;
+  label: string;
+  images: unknown;
+  storeId: number | null;
+  price: string;
+}
+
+// Review core — shared between the admin row (adds response fields) and the
+// user-facing review (user.ts adds typed imageUrls).
+export interface ProductReviewCore {
   id: number;
   reviewBody: string;
   ratings: number;
-  imageUrls: unknown;
   reviewTime: Date;
+  userName: string | null;
+}
+
+export interface AdminProductReview extends ProductReviewCore {
+  imageUrls: unknown;
   adminResponse: string | null;
   adminResponseImages: unknown;
-  userName: string | null;
 }
 
 export interface AdminProductReviewWithSignedUrls extends AdminProductReview {
@@ -491,11 +480,7 @@ export interface AdminProductReviewResponse {
   review: AdminProductReview;
 }
 
-export interface AdminProductGroup {
-  id: number;
-  groupName: string;
-  description: string | null;
-  createdAt: Date;
+export interface AdminProductGroup extends AdminProductGroupInfo {
   products: AdminSku[];
   productCount: number;
 }
@@ -626,20 +611,20 @@ export interface AdminUpdateSlotCapacityResult {
   message: string;
 }
 
-export interface AdminVendorSnippetCreateInput {
-  snippetCode: string;
-  slotId?: number;
-  skuIds: number[];
-  validTill?: string;
-  isPermanent: boolean;
+// Single complete form input for vendor-snippet create + update — callers
+// always send every field (no partial shapes). Derived from the row; validTill
+// is the wire type (ISO string) — the row keeps Date.
+export type AdminVendorSnippetInput = Omit<AdminVendorSnippet, 'id' | 'createdAt' | 'validTill'> & {
+  validTill: string | null
 }
 
-export interface AdminVendorSnippetUpdateInput {
-  snippetCode?: string;
-  slotId?: number;
-  skuIds?: number[];
-  validTill?: string | null;
-  isPermanent?: boolean;
+// Slot-level snippet input (group-model) — sqlite carries skuIds and leaves
+// groupIds unused; the admin-ui SlotForm uses both.
+export interface SlotSnippetInput {
+  name: string
+  groupIds: number[]
+  skuIds: number[]
+  validTill: string | null
 }
 
 export interface AdminVendorSnippetDeleteResult {
diff --git a/packages/shared/types/app-common.types.ts b/packages/shared/types/app-common.types.ts
index f3a84ba..5d02d5c 100644
--- a/packages/shared/types/app-common.types.ts
+++ b/packages/shared/types/app-common.types.ts
@@ -5,16 +5,34 @@
  */
 
 // --- Forms / shared UI ---
+
+// Dialog anchored to a specific order (complaint form, cancel-order dialog)
+export interface OrderDialogBaseProps {
+  open: boolean
+  onClose: () => void
+  orderId: number
+}
+
+// Auth redirect plumbing (route guard options ↔ redirect state); the state
+// variant re-tightens both fields to required.
+export interface AuthRedirectOptions {
+  targetUrl?: string
+  queryParams?: Record<string, any>
+}
+
+// Card that shows one order with a press action (user-ui glimpse, admin-ui history)
+export interface OrderCardActionProps<T> {
+  order: T
+  onPress: () => void
+}
+
 export interface LoginFormInputs {
   mobile: string
   otp?: string
   password?: string
 }
 
-export interface ComplaintFormProps {
-  open: boolean
-  onClose: () => void
-  orderId: number
+export interface ComplaintFormProps extends OrderDialogBaseProps {
 }
 
 // Address form props — identical in user-ui + web-ui AddressForm components
@@ -89,3 +107,44 @@ export interface StoreHeaderState {
   title: string
   setTitle: (title: string) => void
 }
+
+// --- Auth shell (identical user-ui ↔ web-ui; apps add their own user/userDetails) ---
+export interface AuthStateCore {
+  isAuthenticated: boolean
+  isLoading: boolean
+  token: string | null
+}
+
+// --- Zustand store shapes duplicated across user-ui ↔ web-ui ---
+export interface AddressSelectionState {
+  selectedAddressId: number | null
+  setSelectedAddressId: (addressId: number | null) => void
+}
+
+export interface NavigationState {
+  isNavigatedFromHome: boolean
+  selectedStoreId: number | null
+  setNavigatedFromHome: (value: boolean) => void
+  setSelectedStoreId: (id: number | null) => void
+}
+
+export interface FlashNavigationState {
+  shouldNavigateToCart: boolean
+  setShouldNavigateToCart: (value: boolean) => void
+}
+
+export interface QuickDeliveryState {
+  isDrawerHidden: boolean
+  selectedSlotId: number | null
+  setDrawerHidden: (hidden: boolean) => void
+  setSelectedSlotId: (id: number | null) => void
+}
+
+// Central product cache — element type differs per app (MergedProduct vs local Product)
+export interface CentralProductState<Product = unknown> {
+  products: Product[]
+  productsById: Record<number, Product>
+  refetchProducts: (() => void | Promise<void>) | null
+  setProducts: (products: Product[]) => void
+  setRefetchProducts: (refetch: (() => void | Promise<void>) | null) => void
+}
diff --git a/packages/shared/types/coupon.types.ts b/packages/shared/types/coupon.types.ts
index c89afe2..63ef7f8 100644
--- a/packages/shared/types/coupon.types.ts
+++ b/packages/shared/types/coupon.types.ts
@@ -3,6 +3,9 @@
  * Central type definitions for coupon-related data structures
  */
 
+// Canonical coupon row — `skuIds` is the canonical reserved-items field
+// (matches the API schema, admin form and sqlite schema `sku_ids`;
+// postgres maps it to its product_ids column at the boundary).
 export interface Coupon {
   id: number;
   couponCode: string;
@@ -10,7 +13,7 @@ export interface Coupon {
   discountPercent: string | null;
   flatDiscount: string | null;
   minOrder: string | null;
-  productIds: number[] | null;
+  skuIds: number[] | null;
   maxValue: string | null;
   isApplyForAll: boolean;
   validTill: Date | null;
@@ -21,6 +24,10 @@ export interface Coupon {
   createdBy: number;
 }
 
+// Complete form payload for BOTH create and update — callers always send
+// every field (create sends isInvalidated: false, update re-sends createdBy).
+export type CouponFormInput = Omit<Coupon, 'id' | 'createdAt'>
+
 export interface CouponValidationResult {
   valid: boolean;
   message?: string;
diff --git a/packages/shared/types/index.ts b/packages/shared/types/index.ts
index 306a305..ec36da4 100644
--- a/packages/shared/types/index.ts
+++ b/packages/shared/types/index.ts
@@ -11,7 +11,7 @@ export type * from './store.types';
 // Shared cross-cutting types — import from '@packages/shared' anywhere:
 export type * from './primitives.types';   // MessageResponse, BasicSuccessResponse, IdName, ReactParentComponent, TabIconProps
 export type * from './upload.types';   // ContextString, UploadInput, UploadBatchInput, UploadResult
-export type * from './app-common.types';   // LoginFormInputs, ComplaintItemProps/ListItemProps, FlashDeliveryProps, CelebrationProps
+export type * from './app-common.types';   // LoginFormInputs, ListItemProps, FlashDeliveryProps, CelebrationProps, AuthStateCore + zustand store shapes (Navigation/Address/QuickDelivery/FlashNavigation/CentralProductState)
 export type * from './ui-common.types';   // DropdownOption, DialogProps, ConfirmationDialogProps, LoadingDialogProps, QuantifierProps, ImageUploader*, TextButtonProps
 export type * from './order.types';    // PlacedOrder, CouponUsageWithCoupon, GetAllOrdersInput, OrderStatus, DeliveryStatus, CartData
 export type * from './seed.types';     // UnitSeedData, StaffRoleName, StaffPermissionName, RolePermissionAssignment, KeyValSeedData
diff --git a/packages/shared/types/staff-user.types.ts b/packages/shared/types/staff-user.types.ts
index 6b7d20c..44c5209 100644
--- a/packages/shared/types/staff-user.types.ts
+++ b/packages/shared/types/staff-user.types.ts
@@ -1,16 +1,10 @@
 /**
  * Staff User Types
  * Central type definitions for staff user-related data structures
+ * NOTE: StaffUser is single-sourced in admin.ts (nullable staffRoleId row
+ * shape); the strict non-null copy that lived here was an unreachable dup.
  */
 
-export interface StaffUser {
-  id: number;
-  name: string;
-  password: string;
-  staffRoleId: number;
-  createdAt: Date;
-}
-
 export interface StaffRole {
   id: number;
   roleName: string;
diff --git a/packages/shared/types/store.types.ts b/packages/shared/types/store.types.ts
index 52b3d3a..8cc1a95 100644
--- a/packages/shared/types/store.types.ts
+++ b/packages/shared/types/store.types.ts
@@ -4,13 +4,14 @@
  * Note: Store interface is defined in admin.ts to avoid duplication
  */
 
+import type { IdName } from './primitives.types'
+import type { UserTagSummary } from './user'
+
 /**
  * Store summary for dropdowns/forms
  * Minimal data for store selection UI
  */
-export interface StoreSummary {
-  id: number;
-  name: string;
+export interface StoreSummary extends IdName {
   description: string | null;
 }
 
@@ -24,12 +25,9 @@ export interface StoresSummaryResponse {
 /**
  * Lightweight tag row used on store-detail pages (user-ui + web-ui).
  * Named StoreTag to avoid clashing with the richer backend Tag shape.
+ * Derived from UserTagSummary so id/tagName stay in lockstep.
  */
-export interface StoreTag {
-  id: number;
-  tagName: string;
-  productIds?: number[];
-}
+export type StoreTag = Pick<UserTagSummary, 'id' | 'tagName'> & { productIds?: number[] }
 
 /**
  * Chip props for tag selection on store-detail pages.
diff --git a/packages/shared/types/user.ts b/packages/shared/types/user.ts
index d649ff9..2f606ea 100644
--- a/packages/shared/types/user.ts
+++ b/packages/shared/types/user.ts
@@ -1,7 +1,8 @@
 // User-related types
 
 import type { MessageResponse, BasicSuccessResponse } from './primitives.types'
-import type { AdminDeliverySlot } from './admin'
+import type { AdminDeliverySlot, ProductReviewCore, SpecialDealCore } from './admin'
+import type { Complaint } from './complaint.types'
 
 import type { Banner } from './banner.types'
 
@@ -125,14 +126,10 @@ export interface UserBannersResponse {
   banners: UserBanner[];
 }
 
-export interface UserComplaint {
-  id: number;
-  complaintBody: string;
-  response: string | null;
-  isResolved: boolean;
-  createdAt: Date;
-  orderId: number | null;
-}
+export type UserComplaint = Pick<
+  Complaint,
+  'id' | 'complaintBody' | 'response' | 'isResolved' | 'createdAt' | 'orderId'
+>
 
 export interface UserComplaintsResponse {
   complaints: UserComplaint[];
@@ -148,55 +145,42 @@ export interface UserTagSummary {
   productIds: number[];
 }
 
-export interface UserStoreSampleProduct {
+// Store-sample-product cores — signed (authed API) vs plain (cache) variants
+// share id/name; only the image carrier differs.
+export interface UserStoreSampleProductCore {
   id: number;
   name: string;
-  signedImageUrl: string | null;
 }
 
-export interface UserStoreSampleProductData {
-  id: number;
-  name: string;
-  images: string[] | null;
-}
+export type UserStoreSampleProduct = UserStoreSampleProductCore & { signedImageUrl: string | null }
 
-export interface UserStoreSummary {
+export type UserStoreSampleProductData = UserStoreSampleProductCore & { images: string[] | null }
+
+// Store-summary cores — same split (signedImageUrl vs imageUrl) over shared
+// id/name/description/count/sampleProducts.
+export interface UserStoreSummaryCore<P> {
   id: number;
   name: string;
   description: string | null;
-  signedImageUrl: string | null;
   productCount: number;
-  sampleProducts: UserStoreSampleProduct[];
+  sampleProducts: P[];
 }
 
-export interface UserStoreSummaryData {
-  id: number;
-  name: string;
-  description: string | null;
+export interface UserStoreSummary extends UserStoreSummaryCore<UserStoreSampleProduct> {
+  signedImageUrl: string | null;
+}
+
+export interface UserStoreSummaryData extends UserStoreSummaryCore<UserStoreSampleProductData> {
   imageUrl: string | null;
-  productCount: number;
-  sampleProducts: UserStoreSampleProductData[];
 }
 
 export interface UserStoresResponse {
   stores: UserStoreSummary[];
 }
 
-export interface UserStoreProduct {
-  id: number;
-  name: string;
-  shortDescription: string | null;
-  price: string;
-  marketPrice: string | null;
-  incrementStep: number;
-  unit: string;
-  unitNotation: string;
-  images: string[];
-  isOutOfStock: boolean;
-  productQuantity: number;
-}
-
-export interface UserStoreProductData {
+// Product card row — single source for store product cards everywhere
+// (user store pages, admin customize-app, helper caches).
+export interface StoreProductCard {
   id: number;
   name: string;
   shortDescription: string | null;
@@ -210,6 +194,10 @@ export interface UserStoreProductData {
   productQuantity: number;
 }
 
+export type UserStoreProduct = Omit<StoreProductCard, 'images'> & { images: string[] }
+
+export type UserStoreProductData = StoreProductCard
+
 export interface UserStoreDetail {
   store: {
     id: number;
@@ -241,11 +229,7 @@ export interface UserProductDeliverySlot {
   freezeTime: Date;
 }
 
-export interface UserProductSpecialDeal {
-  quantity: string;
-  price: string;
-  validTill: Date;
-}
+export type UserProductSpecialDeal = SpecialDealCore
 
 export interface UserProductComboItem {
   skuId: number;
@@ -257,7 +241,10 @@ export interface UserProductComboItem {
   isOffer: boolean;
 }
 
-export interface UserProductDetailData {
+// Product-detail core — shared by the user API detail payload, the backend
+// cache row (product-store Product) and the sqlite cache row (ProductBasicData).
+// isOffer/isComboOnly are optional here: variants that carry them re-tighten.
+export interface ProductDetailCore {
   id: number;
   productId: number;
   name: string;
@@ -268,14 +255,19 @@ export interface UserProductDetailData {
   unitNotation: string;
   images: string[] | null;
   isOutOfStock: boolean;
-  store: UserProductStoreInfo | null;
   incrementStep: number;
   productQuantity: number;
   isFlashAvailable: boolean;
   flashPrice: string | null;
+  productType: string;
+  isOffer?: boolean;
+  isComboOnly?: boolean;
+}
+
+export interface UserProductDetailData extends ProductDetailCore {
+  store: UserProductStoreInfo | null;
   deliverySlots: UserProductDeliverySlot[];
   specialDeals: UserProductSpecialDeal[];
-  productType: string;
   comboItems: UserProductComboItem[];
 }
 
@@ -283,13 +275,32 @@ export interface UserProductDetail extends UserProductDetailData {
   images: string[];
 }
 
-export interface UserProductReview {
+// Price/availability flag block — anchors the sqlite availability cache row and
+// the apps' MergedProduct intersection (both previously hand-rolled).
+export interface ProductPriceFlags {
+  price: number;
+  marketPrice: number | null;
+  flashPrice: string | null;
+  isFlashAvailable: boolean;
+  isOutOfStock: boolean;
+  isSuspended: boolean;
+}
+
+// Offers-page product card core — sqlite offers/offers-cache row and the
+// user-ui cart ProductSummary anchor here.
+export interface ProductSummaryCore {
   id: number;
-  reviewBody: string;
-  ratings: number;
+  name: string;
+  price: string;
+  marketPrice: string | null;
+  unitNotation: string;
+  images: string[] | null;
+  isOutOfStock: boolean;
+  incrementStep: number;
+}
+
+export interface UserProductReview extends ProductReviewCore {
   imageUrls: string[] | null;
-  reviewTime: Date;
-  userName: string | null;
 }
 
 export interface UserProductReviewWithSignedUrls extends UserProductReview {
@@ -311,10 +322,7 @@ export interface UserSlotProduct {
   images: string[] | null;
 }
 
-export interface UserSlotWithProducts {
-  id: number;
-  deliveryTime: Date;
-  freezeTime: Date;
+export interface UserSlotWithProducts extends UserProductDeliverySlot {
   products: UserSlotProduct[];
 }
 
@@ -335,10 +343,8 @@ export interface UserSlotsListResponse {
   count: number;
 }
 
-export interface UserSlotsWithProductsResponse {
-  slots: UserSlotWithProducts[];
+export interface UserSlotsWithProductsResponse extends UserSlotsResponse {
   productAvailability: UserSlotAvailability[];
-  count: number;
 }
 
 export interface UserPaymentOrderResponse {
diff --git a/packages/ui/src/components/bottom-dropdown.tsx b/packages/ui/src/components/bottom-dropdown.tsx
index 2d4fbd9..0893ef7 100644
--- a/packages/ui/src/components/bottom-dropdown.tsx
+++ b/packages/ui/src/components/bottom-dropdown.tsx
@@ -6,25 +6,19 @@ import MyText from './text';
 import { useTheme } from '../../hooks/theme-context';
 import tw from '../lib/tailwind';
 import { colors } from '../lib/theme-colors';
+import type { DropdownOption as BaseDropdownOption } from '@packages/shared';
+import type { DropdownBaseProps } from './dropdown';
 
-export interface DropdownOption {
-  label: string;
-  value: string | number;
+// Bottom/multi dropdown option — shared base + per-option disabled flag
+export interface DropdownOption extends BaseDropdownOption {
   disabled?: boolean;
 }
 
-interface BottomDropdownProps {
-  label: string;
+interface BottomDropdownProps extends DropdownBaseProps<DropdownOption> {
   topLabel?: string;
   value: string | number | string[] | number[];
-  options: DropdownOption[];
   onValueChange: (value: string | number | string[] | number[]) => void;
   multiple?: boolean;
-  error?: boolean;
-  style?: any;
-  placeholder?: string;
-  disabled?: boolean;
-  className?: string;
   triggerComponent?: React.ComponentType<{
     onPress: () => void;
     disabled?: boolean;
diff --git a/packages/ui/src/components/dropdown.tsx b/packages/ui/src/components/dropdown.tsx
index b44b43c..a7b1aa8 100755
--- a/packages/ui/src/components/dropdown.tsx
+++ b/packages/ui/src/components/dropdown.tsx
@@ -6,11 +6,13 @@ import type { DropdownOption } from '@packages/shared';
 
 export type { DropdownOption } from '@packages/shared';
 
-interface Props {
+// Common dropdown scaffold — value/onValueChange stay per-variant because the
+// single dropdown carries a scalar and the bottom/multi one carries arrays.
+// The option element type is generic: the bottom/multi dropdown extends the
+// shared DropdownOption with a per-option disabled flag.
+export interface DropdownBaseProps<O = DropdownOption> {
   label: string;
-  value: string | number;
-  options: DropdownOption[];
-  onValueChange: (value: string | number) => void;
+  options: O[];
   error?: boolean;
   style?: any;
   placeholder?: string;
@@ -18,6 +20,11 @@ interface Props {
   className?: string;
 }
 
+interface Props extends DropdownBaseProps {
+  value: string | number;
+  onValueChange: (value: string | number) => void;
+}
+
 const CustomDropdown: React.FC<Props> = ({
   label,
   value,
diff --git a/packages/web-components/src/components/image-gallery-with-delete.tsx b/packages/web-components/src/components/image-gallery-with-delete.tsx
index 265ac4e..a2fd27f 100644
--- a/packages/web-components/src/components/image-gallery-with-delete.tsx
+++ b/packages/web-components/src/components/image-gallery-with-delete.tsx
@@ -1,11 +1,10 @@
 import React from 'react'
 import { cn } from '../lib/utils'
 import { X } from 'lucide-react'
+import type { ImageCarouselProps } from './image-carousel'
 
-interface ImageGalleryWithDeleteProps {
-  images: { uri?: string }[]
+interface ImageGalleryWithDeleteProps extends ImageCarouselProps {
   onRemove: (uri: string) => void
-  className?: string
 }
 
 export function ImageGalleryWithDelete({
diff --git a/packages/web-components/tsconfig.json b/packages/web-components/tsconfig.json
index abc53d9..0bf69c8 100644
--- a/packages/web-components/tsconfig.json
+++ b/packages/web-components/tsconfig.json
@@ -9,10 +9,7 @@
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
     "resolveJsonModule": true,
-    "declaration": true,
-    "declarationMap": true,
-    "outDir": "./dist",
-    "rootDir": "./src",
+    "noEmit": true,
     "paths": {
       "@/*": ["./src/*"],
       "@packages/shared": ["../shared"],
diff --git a/typecheck b/typecheck
new file mode 100755
index 0000000..62f85ac
--- /dev/null
+++ b/typecheck
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# Typechecks every app/package that has a tsconfig.
+# packages/shared and packages/ui have no tsconfig of their own — they are
+# typechecked transitively via the consumers below.
+set -u
+cd "$(dirname "$0")"
+
+targets=(
+  apps/backend
+  apps/user-ui
+  apps/admin-ui
+  apps/web-ui
+  apps/fallback-ui
+  packages/db_helper_sqlite
+  packages/db_helper_postgres
+  packages/migrator
+  packages/web-components
+)
+
+log="$(mktemp)"
+failed=0
+for target in "${targets[@]}"; do
+  if [ ! -f "$target/tsconfig.json" ]; then
+    printf '⏭  %-32s (no tsconfig)\n' "$target"
+    continue
+  fi
+  printf '▶  %-32s ' "$target"
+  if (cd "$target" && npx tsc --noEmit >"$log" 2>&1); then
+    echo '✅ clean'
+  else
+    errors=$(grep -c 'error TS' "$log" || true)
+    echo "❌ ${errors} error(s)"
+    head -20 "$log"
+    failed=1
+  fi
+done
+rm -f "$log"
+
+if [ "$failed" -ne 0 ]; then
+  echo '❌ typecheck failed'
+  exit 1
+fi
+echo '✅ all packages typecheck clean'