fix bug 2

src/model/price.ts

@@ -11,4 +11,6 @@ export interface last {
   sell: number
   buy: number
   price_last: number
+  /** آخرین مظنه ذخیره‌شده در جدول prices — برای fallback محصول */
+  last_historical?: number
 }

src/utils/productEditorPrice.ts

@@ -58,13 +58,19 @@ export type ProductEditorPricePreview =
 
 function resolveStoredFallbackPrice(
   storedPrice: number | null | undefined,
-  useLastPriceIfZero: boolean | undefined
+  useLastPriceIfZero: boolean | undefined,
+  lastHistoricalPrice?: number | null
 ): number {
   if (!useLastPriceIfZero) {
     return 0
   }
 
-  return Number(storedPrice) || 0
+  const stored = Number(storedPrice) || 0
+  if (stored > 0) {
+    return stored
+  }
+
+  return Number(lastHistoricalPrice) || 0
 }
 
 export function computeProductEditorPricePreview(input: {
@@ -78,7 +84,7 @@ export function computeProductEditorPricePreview(input: {
   methodOption: string
   meltedPriceOption: MeltedPriceSource
   pricesData: MethodePrices[]
-  appLastPrice?: (Partial<last> & { price?: number }) | null
+  appLastPrice?: (Partial<last> & { price?: number; last_historical?: number }) | null
 }): ProductEditorPricePreview {
   const offsetPercent = Number(input.form.price_offset_percent ?? 0)
   const melted = isMeltedTradeGroup(input.form.group_type)
@@ -100,13 +106,19 @@ export function computeProductEditorPricePreview(input: {
           source: 'قیمت صفحه اصلی اپ'
         }
       }
+      const stored = Number(input.form.price) || 0
       const fallback = resolveStoredFallbackPrice(
         input.form.price,
-        input.form.use_last_price_if_zero ?? false
+        input.form.use_last_price_if_zero ?? false,
+        input.appLastPrice?.last_historical
       )
-      return fallback > 0
+      if (fallback > 0) {
-        ? { status: 'ready', amount: fallback, source: 'آخرین قیمت ذخیره‌شده' }
+        const amount = stored > 0
-        : { status: 'empty', message: 'قیمت provider صفر است' }
+          ? fallback
+          : adjustedProductPrice(fallback, 0, offsetPercent)
+        return { status: 'ready', amount, source: 'آخرین قیمت ذخیره‌شده' }
+      }
+      return { status: 'empty', message: 'قیمت provider صفر است' }
     }
 
     if (!input.form.reading_method) {
@@ -123,7 +135,8 @@ export function computeProductEditorPricePreview(input: {
     }
     const fallback = resolveStoredFallbackPrice(
       input.form.price,
-      input.form.use_last_price_if_zero ?? false
+      input.form.use_last_price_if_zero ?? false,
+      input.appLastPrice?.last_historical
     )
     return fallback > 0
       ? { status: 'ready', amount: fallback, source: 'آخرین قیمت ذخیره‌شده' }
@@ -151,7 +164,8 @@ export function computeProductEditorPricePreview(input: {
   }
   const fallback = resolveStoredFallbackPrice(
     input.form.price,
-    input.form.use_last_price_if_zero ?? false
+    input.form.use_last_price_if_zero ?? false,
+    input.appLastPrice?.last_historical
   )
   return fallback > 0
     ? { status: 'ready', amount: fallback, source: 'آخرین قیمت ذخیره‌شده' }