refactor(withdraw): 优化快速提现金额计算逻辑

- 引入舍入单位计算，避免小额差值导致的选项过多问题
- 实现最小最大钻石数量的舍入处理
- 重构快速提现金额生成算法，提高计算精度
- 使用索引映射方式重新实现金额选项生成
- 更新项目索引统计信息，反映代码结构变化

AGENTS.md

@@ -1,7 +1,7 @@
 <!-- gitnexus:start -->
 # GitNexus — Code Intelligence
 
-This project is indexed by GitNexus as **36-character-flower** (3095 symbols, 6119 relationships, 264 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
+This project is indexed by GitNexus as **36-character-flower** (3365 symbols, 6609 relationships, 288 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
 
 > If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.
 

CLAUDE.md

@@ -1,7 +1,7 @@
 <!-- gitnexus:start -->
 # GitNexus — Code Intelligence
 
-This project is indexed by GitNexus as **36-character-flower** (3095 symbols, 6119 relationships, 264 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
+This project is indexed by GitNexus as **36-character-flower** (3365 symbols, 6609 relationships, 288 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
 
 > If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.
 

src/features/game/components/desktop/desktop-withdraw.tsx

@@ -390,62 +390,6 @@ function DesktopWithdraw() {
       >
         <div className="flex min-h-full min-w-0 flex-[1.7] flex-col px-design-16 py-design-14">
           <div className="flex flex-col gap-design-12">
-            <WithdrawField
-              label={t('gameDesktop.withdraw.fields.diamondAmount')}
-            >
-              <AmountShell
-                amount={vm.amount}
-                availableBalanceText={t(
-                  'gameDesktop.withdraw.availableBalance',
-                  { amount: formatNumber(vm.availableBalance) },
-                )}
-                onAmountChange={handleAmountChange}
-                onMinus={() => handleAmountChange(vm.amount - 1)}
-                onPlus={() => handleAmountChange(vm.amount + 1)}
-              />
-              {hasSubmitted && vm.amountRequiredError ? (
-                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountRequired')}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountExceedsBalance ? (
-                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountExceedsBalance')}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountBelowPaymentMinimum ? (
-                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountBelowPaymentMinimum', {
-                    amount: vm.paymentMinimumAmountLabel,
-                  })}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountAbovePaymentMaximum ? (
-                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountAbovePaymentMaximum', {
-                    amount: vm.paymentMaximumAmountLabel,
-                  })}
-                </div>
-              ) : null}
-            </WithdrawField>
-
-            <div className="flex items-start gap-design-14">
-              <div className="w-design-132 shrink-0" />
-              <div className="grid min-w-0 flex-1 grid-cols-3 gap-design-10">
-                {vm.quickAmounts.map((option) => (
-                  <QuickAmountCard
-                    key={option.id}
-                    amount={option.diamonds}
-                    preview={option.preview}
-                    active={option.id === activeQuickAmountId}
-                    onClick={() =>
-                      handleQuickAmountSelect(option.id, option.diamonds)
-                    }
-                  />
-                ))}
-              </div>
-            </div>
-
             <WithdrawField
               label={t('gameDesktop.withdraw.fields.paymentChannel')}
             >
@@ -516,6 +460,62 @@ function DesktopWithdraw() {
               </div>
             </WithdrawField>
 
+            <WithdrawField
+              label={t('gameDesktop.withdraw.fields.diamondAmount')}
+            >
+              <AmountShell
+                amount={vm.amount}
+                availableBalanceText={t(
+                  'gameDesktop.withdraw.availableBalance',
+                  { amount: formatNumber(vm.availableBalance) },
+                )}
+                onAmountChange={handleAmountChange}
+                onMinus={() => handleAmountChange(vm.amount - 1)}
+                onPlus={() => handleAmountChange(vm.amount + 1)}
+              />
+              {hasSubmitted && vm.amountRequiredError ? (
+                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountRequired')}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountExceedsBalance ? (
+                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountExceedsBalance')}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountBelowPaymentMinimum ? (
+                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountBelowPaymentMinimum', {
+                    amount: vm.paymentMinimumAmountLabel,
+                  })}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountAbovePaymentMaximum ? (
+                <div className="pl-design-2 text-design-13 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountAbovePaymentMaximum', {
+                    amount: vm.paymentMaximumAmountLabel,
+                  })}
+                </div>
+              ) : null}
+            </WithdrawField>
+
+            <div className="flex items-start gap-design-14">
+              <div className="w-design-132 shrink-0" />
+              <div className="grid min-w-0 flex-1 grid-cols-3 gap-design-10">
+                {vm.quickAmounts.map((option) => (
+                  <QuickAmountCard
+                    key={option.id}
+                    amount={option.diamonds}
+                    preview={option.preview}
+                    active={option.id === activeQuickAmountId}
+                    onClick={() =>
+                      handleQuickAmountSelect(option.id, option.diamonds)
+                    }
+                  />
+                ))}
+              </div>
+            </div>
+
             <WithdrawField
               label={t('gameDesktop.withdraw.fields.currencyType')}
               alignStart={false}

src/features/game/components/mobile/mobile-withdraw.tsx

@@ -380,59 +380,6 @@ function MobileWithdraw() {
       >
         <div className="min-h-0 flex-1 overflow-y-auto px-design-8 py-design-7">
           <div className="flex flex-col !gap-design-10">
-            <WithdrawField
-              label={t('gameDesktop.withdraw.fields.diamondAmount')}
-            >
-              <AmountShell
-                amount={vm.amount}
-                availableBalanceText={t(
-                  'gameDesktop.withdraw.availableBalance',
-                  { amount: formatNumber(vm.availableBalance) },
-                )}
-                onAmountChange={handleAmountChange}
-                onMinus={() => handleAmountChange(vm.amount - 1)}
-                onPlus={() => handleAmountChange(vm.amount + 1)}
-              />
-              {hasSubmitted && vm.amountRequiredError ? (
-                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountRequired')}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountExceedsBalance ? (
-                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountExceedsBalance')}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountBelowPaymentMinimum ? (
-                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountBelowPaymentMinimum', {
-                    amount: vm.paymentMinimumAmountLabel,
-                  })}
-                </div>
-              ) : null}
-              {hasSubmitted && vm.amountAbovePaymentMaximum ? (
-                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
-                  {t('gameDesktop.withdraw.errors.amountAbovePaymentMaximum', {
-                    amount: vm.paymentMaximumAmountLabel,
-                  })}
-                </div>
-              ) : null}
-            </WithdrawField>
-
-            <div className="grid min-w-0 grid-cols-3 gap-design-5">
-              {vm.quickAmounts.map((option) => (
-                <QuickAmountCard
-                  key={option.id}
-                  amount={option.diamonds}
-                  preview={option.preview}
-                  active={option.id === activeQuickAmountId}
-                  onClick={() =>
-                    handleQuickAmountSelect(option.id, option.diamonds)
-                  }
-                />
-              ))}
-            </div>
-
             <WithdrawField
               label={t('gameDesktop.withdraw.fields.paymentChannel')}
             >
@@ -500,6 +447,59 @@ function MobileWithdraw() {
               </div>
             </WithdrawField>
 
+            <WithdrawField
+              label={t('gameDesktop.withdraw.fields.diamondAmount')}
+            >
+              <AmountShell
+                amount={vm.amount}
+                availableBalanceText={t(
+                  'gameDesktop.withdraw.availableBalance',
+                  { amount: formatNumber(vm.availableBalance) },
+                )}
+                onAmountChange={handleAmountChange}
+                onMinus={() => handleAmountChange(vm.amount - 1)}
+                onPlus={() => handleAmountChange(vm.amount + 1)}
+              />
+              {hasSubmitted && vm.amountRequiredError ? (
+                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountRequired')}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountExceedsBalance ? (
+                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountExceedsBalance')}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountBelowPaymentMinimum ? (
+                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountBelowPaymentMinimum', {
+                    amount: vm.paymentMinimumAmountLabel,
+                  })}
+                </div>
+              ) : null}
+              {hasSubmitted && vm.amountAbovePaymentMaximum ? (
+                <div className="pl-design-2 text-design-10 text-[#F44F4F]">
+                  {t('gameDesktop.withdraw.errors.amountAbovePaymentMaximum', {
+                    amount: vm.paymentMaximumAmountLabel,
+                  })}
+                </div>
+              ) : null}
+            </WithdrawField>
+
+            <div className="grid min-w-0 grid-cols-3 gap-design-5">
+              {vm.quickAmounts.map((option) => (
+                <QuickAmountCard
+                  key={option.id}
+                  amount={option.diamonds}
+                  preview={option.preview}
+                  active={option.id === activeQuickAmountId}
+                  onClick={() =>
+                    handleQuickAmountSelect(option.id, option.diamonds)
+                  }
+                />
+              ))}
+            </div>
+
             <WithdrawField
               label={t('gameDesktop.withdraw.fields.currencyType')}
             >

src/hooks/use-withdraw-vm.ts

@@ -2,7 +2,6 @@ import { useCallback, useEffect, useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import {
   DEFAULT_WITHDRAW_CONFIG,
-  QUICK_FIAT_AMOUNTS,
   WITHDRAW_EMAIL_PATTERN,
   WITHDRAW_PHONE_PATTERN,
 } from '@/constants'
@@ -10,22 +9,88 @@ import { useDepositWithdrawConfig } from '@/hooks/use-deposit-withdraw-config'
 import { useAuthStore } from '@/store'
 import type { DepositWithdrawConfig } from '@/type'
 
+const QUICK_WITHDRAW_OPTION_COUNT = 6
+
+interface WithdrawDiamondBounds {
+  maximumDiamonds: number
+  minimumDiamonds: number
+}
+
 function formatNumber(locale: string, value: number) {
   return new Intl.NumberFormat(locale).format(value)
 }
 
-function getInitialWithdrawAmount(
+function getInitialWithdrawAmount(bounds: WithdrawDiamondBounds | null) {
+  return bounds?.minimumDiamonds ?? 0
+}
+
+function getWithdrawDiamondBounds(
   selectedExchangeRate: number,
   maxWithdrawAmount: number,
-) {
+  minimumFiatAmount: number | null,
-  if (maxWithdrawAmount <= 0) {
+  maximumFiatAmount: number | null,
-    return 0
+): WithdrawDiamondBounds | null {
+  if (selectedExchangeRate <= 0 || maxWithdrawAmount <= 0) {
+    return null
   }
 
-  return Math.min(
+  const minimumDiamonds = Math.max(
-    maxWithdrawAmount,
+    1,
-    Math.max(1, Math.round(QUICK_FIAT_AMOUNTS[0] / selectedExchangeRate)),
+    minimumFiatAmount === null
+      ? 1
+      : Math.ceil(minimumFiatAmount / selectedExchangeRate),
   )
+  const methodMaximumDiamonds =
+    maximumFiatAmount === null
+      ? maxWithdrawAmount
+      : Math.floor(maximumFiatAmount / selectedExchangeRate)
+  const maximumDiamonds = Math.min(maxWithdrawAmount, methodMaximumDiamonds)
+
+  if (maximumDiamonds < minimumDiamonds) {
+    return null
+  }
+
+  return {
+    maximumDiamonds,
+    minimumDiamonds,
+  }
+}
+
+function getQuickWithdrawAmounts(bounds: WithdrawDiamondBounds) {
+  const { maximumDiamonds, minimumDiamonds } = bounds
+  const roundingUnit =
+    10 ** Math.max(0, Math.floor(Math.log10(maximumDiamonds)) - 1)
+  const roundedMinimumDiamonds =
+    Math.ceil(minimumDiamonds / roundingUnit) * roundingUnit
+  const roundedMaximumDiamonds =
+    Math.floor(maximumDiamonds / roundingUnit) * roundingUnit
+
+  if (roundedMinimumDiamonds > roundedMaximumDiamonds) {
+    return []
+  }
+
+  const availableOptionCount =
+    (roundedMaximumDiamonds - roundedMinimumDiamonds) / roundingUnit + 1
+
+  if (availableOptionCount <= QUICK_WITHDRAW_OPTION_COUNT) {
+    return Array.from(
+      { length: availableOptionCount },
+      (_, index) => roundedMinimumDiamonds + index * roundingUnit,
+    )
+  }
+
+  const lastOptionIndex = availableOptionCount - 1
+  const optionIndexes = new Set<number>([0, lastOptionIndex])
+
+  for (let index = 1; index < QUICK_WITHDRAW_OPTION_COUNT - 1; index += 1) {
+    optionIndexes.add(
+      Math.round((lastOptionIndex * index) / (QUICK_WITHDRAW_OPTION_COUNT - 1)),
+    )
+  }
+
+  return [...optionIndexes]
+    .sort((left, right) => left - right)
+    .map((index) => roundedMinimumDiamonds + index * roundingUnit)
 }
 
 function getCurrencyExchangeRate(
@@ -170,6 +235,21 @@ export function useWithdrawVm() {
   const selectedPaymentMaximumAmount = selectedPaymentMethod
     ? toOptionalNumber(selectedPaymentMethod.maximumAmount)
     : null
+  const withdrawDiamondBounds = useMemo(
+    () =>
+      getWithdrawDiamondBounds(
+        selectedExchangeRate,
+        maxWithdrawAmount,
+        selectedPaymentMinimumAmount,
+        selectedPaymentMaximumAmount,
+      ),
+    [
+      maxWithdrawAmount,
+      selectedExchangeRate,
+      selectedPaymentMaximumAmount,
+      selectedPaymentMinimumAmount,
+    ],
+  )
   const amountBelowPaymentMinimum =
     amount > 0 &&
     selectedPaymentMinimumAmount !== null &&
@@ -274,13 +354,11 @@ export function useWithdrawVm() {
   }, [bankCode, sortedBanks])
 
   useEffect(() => {
-    if (!hasInitializedAmount && selectedExchangeRate > 0) {
+    if (!hasInitializedAmount && withdrawDiamondBounds) {
-      setAmount(
+      setAmount(getInitialWithdrawAmount(withdrawDiamondBounds))
-        getInitialWithdrawAmount(selectedExchangeRate, maxWithdrawAmount),
-      )
       setHasInitializedAmount(true)
     }
-  }, [hasInitializedAmount, maxWithdrawAmount, selectedExchangeRate, setAmount])
+  }, [hasInitializedAmount, setAmount, withdrawDiamondBounds])
 
   useEffect(() => {
     if (amount > maxWithdrawAmount) {
@@ -289,19 +367,26 @@ export function useWithdrawVm() {
   }, [amount, maxWithdrawAmount, setAmount])
 
   const quickAmounts = useMemo(() => {
-    if (!selectedCurrency || selectedExchangeRate <= 0) {
+    if (!selectedCurrency || !withdrawDiamondBounds) {
       return []
     }
 
-    return QUICK_FIAT_AMOUNTS.map((fiatAmount) => ({
+    return getQuickWithdrawAmounts(withdrawDiamondBounds).map((diamonds) => ({
-      diamonds: Math.min(
+      diamonds,
-        maxWithdrawAmount,
+      id: `quick-${paymentChannelCode}-${paymentType}-${selectedCurrency.code}-${diamonds}`,
-        Math.max(1, Math.round(fiatAmount / selectedExchangeRate)),
+      preview: `${selectedCurrency.code} ${formatNumber(
-      ),
+        locale,
-      id: `quick-${selectedCurrency.code}-${fiatAmount}`,
+        diamonds * selectedExchangeRate,
-      preview: `${selectedCurrency.code} ${formatNumber(locale, fiatAmount)}`,
+      )}`,
     }))
-  }, [locale, maxWithdrawAmount, selectedCurrency, selectedExchangeRate])
+  }, [
+    locale,
+    paymentChannelCode,
+    paymentType,
+    selectedCurrency,
+    selectedExchangeRate,
+    withdrawDiamondBounds,
+  ])
 
   const resetForm = useCallback(() => {
     const nextPaymentChannelCode = sortedPayChannels[0]?.code ?? ''
@@ -311,6 +396,7 @@ export function useWithdrawVm() {
       ) ?? null
     const nextCurrency =
       getChannelCurrencies(config, nextPaymentChannel)[0] ?? null
+    const nextPaymentMethod = nextPaymentChannel?.methods[0] ?? null
     const nextExchangeRate = nextCurrency
       ? getCurrencyExchangeRate(
           config,
@@ -318,16 +404,23 @@ export function useWithdrawVm() {
           nextCurrency.withdrawCoinsPerFiatValue || 1,
         )
       : 0
-
+    const nextWithdrawDiamondBounds = getWithdrawDiamondBounds(
-    setAmountState(
+      nextExchangeRate,
-      nextExchangeRate > 0
+      maxWithdrawAmount,
-        ? getInitialWithdrawAmount(nextExchangeRate, maxWithdrawAmount)
+      nextPaymentMethod
-        : 0,
+        ? toOptionalNumber(nextPaymentMethod.minimumAmount)
+        : null,
+      nextPaymentMethod
+        ? toOptionalNumber(nextPaymentMethod.maximumAmount)
+        : null,
     )
-    setHasInitializedAmount(true)
+    const nextAmount = getInitialWithdrawAmount(nextWithdrawDiamondBounds)
+
+    setAmountState(nextAmount)
+    setHasInitializedAmount(nextAmount > 0)
     setCurrencyCode(nextCurrency?.code ?? '')
     setPaymentChannelCode(nextPaymentChannelCode)
-    setPaymentType(nextPaymentChannel?.methods[0]?.code ?? '')
+    setPaymentType(nextPaymentMethod?.code ?? '')
     setBankCode('')
     setHolderName('')
     setBankAccount('')