Fix parsing amount based on language of user

src/Model.ts

@@ -100,6 +100,8 @@ export class Model {
     timeoutReferralStats?: ReturnType<typeof setTimeout>
     timeoutHipoGauge?: ReturnType<typeof setTimeout>
 
+    readonly numberParser = new NumberParser(navigator.language)
+
     readonly dedustSwapUrl = 'https://dedust.io/swap/hTON/TON'
     readonly dedustPoolUrl = 'https://dedust.io/pools/EQBWsAdyAg-8fs3G-m-eUBCXZuVaOldF5-tCMJBJzxQG7nLX'
     readonly stonSwapUrl = 'https://app.ston.fi/swap?chartVisible=false&ft=hTON&tt=TON'
@@ -323,7 +325,7 @@ export class Model {
     }
 
     get amountInNano() {
-        const amount = this.amount.trim()
+        const amount = this.numberParser.parse(this.amount).toString()
         try {
             return toNano(amount)
         } catch {
@@ -1209,6 +1211,30 @@ export class Model {
     }
 }
 
+class NumberParser {
+    #group: RegExp
+    #decimal: RegExp
+    #numeral: RegExp
+    #index: (substring: string) => string
+    constructor(locale: string) {
+        const parts = new Intl.NumberFormat(locale).formatToParts(12345.6)
+        const numerals = [...new Intl.NumberFormat(locale, { useGrouping: false }).format(9876543210)].reverse()
+        const index = new Map(numerals.map((d, i) => [d, i]))
+        this.#group = new RegExp(`[${(parts.find((d) => d.type === 'group') ?? parts[0]).value}]`, 'g')
+        this.#decimal = new RegExp(`[${(parts.find((d) => d.type === 'decimal') ?? parts[0]).value}]`)
+        this.#numeral = new RegExp(`[${numerals.join('')}]`, 'g')
+        this.#index = (d) => (index.get(d) ?? '').toString()
+    }
+    parse(input: string) {
+        const result = input
+            .trim()
+            .replace(this.#group, '')
+            .replace(this.#decimal, '.')
+            .replace(this.#numeral, this.#index)
+        return result ? +result : NaN
+    }
+}
+
 export function formatCompact1Fraction(n: number): string {
     return n.toLocaleString(undefined, { notation: 'compact', maximumFractionDigits: 1 })
 }