feat(admin): signed profit/discount fields for special price packages

Let buy/sell extras be entered as profit or discount so negative values work in the editor and table.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/core/utils/convert.ts

@@ -27,6 +27,7 @@ export function sanitizeNumericString(
   const allowDecimal = options.allowDecimal !== false
   let s = persian2english(String(raw ?? '').trim())
     .replace(/[٬,\s]/g, '')
+    .replace(/[−–—]/g, '-')
     .replace(/٫/g, '.')
     .replace(/\//g, '.')
 

src/core/utils/usePrice.ts

@@ -2,11 +2,15 @@ import { persian2english, parseNumericValue, sanitizeNumericString } from '@core
 
 export function usePrice(price: number | string, digit = true, unit = 'ریال') {
   const n = typeof price === 'number' ? price : parseNumericValue(price)
-  let _price = Number.isFinite(n) ? String(n) : persian2english(String(price ?? ''))
-  if (digit && Number.isFinite(n)) {
+  const finite = Number.isFinite(n)
+  const sign = finite && n < 0 ? '-' : ''
+  const abs = finite ? Math.abs(n) : NaN
+  let _price = finite ? String(abs) : persian2english(String(price ?? ''))
+  if (digit && Number.isFinite(abs)) {
     _price = _price.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
   }
-  return `${_price} ${unit}`
+  const shown = finite ? `${sign}${_price}` : _price
+  return unit ? `${shown} ${unit}` : shown
 }
 
 export function useTowDecimal(num: string | number): string | number {