feat: 充值、划转、提现页面改用 Material Design 3 输入框

- deposit_page.dart: 金额输入框改用 MaterialInput
- transfer_page.dart: 金额输入框改用 MaterialInput
- withdraw_page.dart: 金额、地址、联系方式输入框改用 MaterialInput
- 保持所有业务逻辑和验证逻辑不变
- 统一视觉风格（圆角边框 + Focus 效果）

flutter_monisuo/lib/ui/pages/asset/deposit_page.dart

@@ -6,6 +6,7 @@ import '../../../core/theme/app_theme.dart';
 import '../../../core/theme/app_spacing.dart';
 import '../../../core/utils/toast_utils.dart';
 import '../../../providers/asset_provider.dart';
+import '../../components/material_input.dart';
 
 /// 充值页面
 class DepositPage extends StatefulWidget {
@@ -172,8 +173,6 @@ class _DepositPageState extends State<DepositPage> {
           const SizedBox(height: AppSpacing.lg),
 
           // 金额输入
-          _buildAmountLabel(colorScheme),
-          const SizedBox(height: AppSpacing.sm),
           _buildAmountInput(colorScheme),
           const SizedBox(height: AppSpacing.sm),
 
@@ -239,59 +238,25 @@ class _DepositPageState extends State<DepositPage> {
   }
 
   Widget _buildAmountInput(ColorScheme colorScheme) {
-    return Container(
-      width: double.infinity,
-      height: 52,
-      decoration: BoxDecoration(
-        color: colorScheme.surface,
-        borderRadius: BorderRadius.circular(14),
-        border: Border.all(
-          color: _amountFocus.hasFocus
-              ? colorScheme.secondary
-              : colorScheme.outlineVariant.withValues(alpha: 0.5),
-          width: 1,
+    return MaterialInput(
+      controller: _amountController,
+      focusNode: _amountFocus,
+      labelText: '充值金額',
+      hintText: '0.00',
+      keyboardType: const TextInputType.numberWithOptions(decimal: true),
+      inputFormatters: [
+        FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,8}')),
+      ],
+      suffixIcon: Padding(
+        padding: const EdgeInsets.only(right: AppSpacing.md),
+        child: Text(
+          'USDT',
+          style: AppTextStyles.bodyMedium(context).copyWith(
+            color: colorScheme.onSurfaceVariant,
+            fontWeight: FontWeight.w500,
+          ),
         ),
       ),
-      padding: const EdgeInsets.symmetric(horizontal: 16),
-      child: Row(
-        children: [
-          Expanded(
-            child: TextField(
-              controller: _amountController,
-              focusNode: _amountFocus,
-              keyboardType:
-                  const TextInputType.numberWithOptions(decimal: true),
-              inputFormatters: [
-                FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,8}')),
-              ],
-              style: TextStyle(
-                fontSize: 24,
-                fontWeight: FontWeight.w600,
-                color: colorScheme.onSurface,
-              ),
-              decoration: InputDecoration(
-                hintText: '0.00',
-                hintStyle: TextStyle(
-                  fontSize: 24,
-                  fontWeight: FontWeight.w600,
-                  color:
-                      colorScheme.onSurfaceVariant.withValues(alpha: 0.3),
-                ),
-                border: InputBorder.none,
-                contentPadding: EdgeInsets.zero,
-                isDense: true,
-              ),
-            ),
-          ),
-          Text(
-            'USDT',
-            style: AppTextStyles.bodyMedium(context).copyWith(
-              color: colorScheme.onSurfaceVariant,
-              fontWeight: FontWeight.w500,
-            ),
-          ),
-        ],
-      ),
     );
   }
 

flutter_monisuo/lib/ui/pages/asset/transfer_page.dart

@@ -6,6 +6,7 @@ import '../../../core/theme/app_theme.dart';
 import '../../../core/theme/app_spacing.dart';
 import '../../../providers/asset_provider.dart';
 import '../../../data/models/account_models.dart';
+import '../../components/material_input.dart';
 
 /// 划转页面
 class TransferPage extends StatefulWidget {
@@ -365,60 +366,25 @@ class _TransferPageState extends State<TransferPage> {
         const SizedBox(height: 12),
 
         // 金额输入框
-        Container(
-          width: double.infinity,
-          height: 52,
-          decoration: BoxDecoration(
-            color: colorScheme.surface,
-            borderRadius: BorderRadius.circular(14),
-            border: Border.all(
-              color: _focusNode.hasFocus
-                  ? colorScheme.secondary
-                  : colorScheme.outlineVariant.withValues(alpha: 0.5),
-              width: 1,
+        MaterialInput(
+          controller: _amountController,
+          focusNode: _focusNode,
+          hintText: '0.00',
+          keyboardType: const TextInputType.numberWithOptions(decimal: true),
+          inputFormatters: [
+            FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,8}')),
+          ],
+          onChanged: (_) => setState(() {}),
+          suffixIcon: Padding(
+            padding: const EdgeInsets.only(right: AppSpacing.md),
+            child: Text(
+              'USDT',
+              style: AppTextStyles.bodyMedium(context).copyWith(
+                color: colorScheme.onSurfaceVariant,
+                fontWeight: FontWeight.w500,
+              ),
             ),
           ),
-          padding: const EdgeInsets.symmetric(horizontal: 16),
-          child: Row(
-            children: [
-              Expanded(
-                child: TextField(
-                  controller: _amountController,
-                  focusNode: _focusNode,
-                  keyboardType:
-                      const TextInputType.numberWithOptions(decimal: true),
-                  inputFormatters: [
-                    FilteringTextInputFormatter.allow(
-                        RegExp(r'^\d*\.?\d{0,8}')),
-                  ],
-                  style: TextStyle(
-                    fontSize: 24,
-                    fontWeight: FontWeight.w600,
-                    color: colorScheme.onSurface,
-                  ),
-                  decoration: InputDecoration(
-                    hintText: '0.00',
-                    hintStyle: TextStyle(
-                      fontSize: 24,
-                      fontWeight: FontWeight.w600,
-                      color: colorScheme.onSurfaceVariant.withValues(alpha: 0.3),
-                    ),
-                    border: InputBorder.none,
-                    contentPadding: EdgeInsets.zero,
-                    isDense: true,
-                  ),
-                  onChanged: (_) => setState(() {}),
-                ),
-              ),
-              Text(
-                'USDT',
-                style: AppTextStyles.bodyMedium(context).copyWith(
-                  color: colorScheme.onSurfaceVariant,
-                  fontWeight: FontWeight.w500,
-                ),
-              ),
-            ],
-          ),
         ),
         const SizedBox(height: 10),
 

flutter_monisuo/lib/ui/pages/asset/withdraw_page.dart

@@ -6,6 +6,7 @@ import '../../../core/theme/app_theme.dart';
 import '../../../core/theme/app_spacing.dart';
 import '../../../core/utils/toast_utils.dart';
 import '../../../providers/asset_provider.dart';
+import '../../components/material_input.dart';
 
 /// 提现页面
 class WithdrawPage extends StatefulWidget {
@@ -146,8 +147,6 @@ class _WithdrawPageState extends State<WithdrawPage> {
             ],
 
             // 提现金额
-            _buildSectionLabel(colorScheme, '提現金額'),
-            const SizedBox(height: AppSpacing.sm),
             _buildAmountInput(colorScheme),
             const SizedBox(height: AppSpacing.sm),
 
@@ -164,14 +163,10 @@ class _WithdrawPageState extends State<WithdrawPage> {
             ],
 
             // 目标地址
-            _buildSectionLabel(colorScheme, '目標地址'),
-            const SizedBox(height: AppSpacing.sm),
             _buildAddressInput(colorScheme),
             const SizedBox(height: AppSpacing.lg),
 
             // 联系方式
-            _buildSectionLabel(colorScheme, '聯繫方式（可選）'),
-            const SizedBox(height: AppSpacing.sm),
             _buildContactInput(colorScheme),
             const SizedBox(height: AppSpacing.xl),
 
@@ -237,59 +232,25 @@ class _WithdrawPageState extends State<WithdrawPage> {
   }
 
   Widget _buildAmountInput(ColorScheme colorScheme) {
-    return Container(
-      width: double.infinity,
-      height: 52,
-      decoration: BoxDecoration(
-        color: colorScheme.surface,
-        borderRadius: BorderRadius.circular(14),
-        border: Border.all(
-          color: _amountFocus.hasFocus
-              ? colorScheme.secondary
-              : colorScheme.outlineVariant.withValues(alpha: 0.5),
-          width: 1,
+    return MaterialInput(
+      controller: _amountController,
+      focusNode: _amountFocus,
+      labelText: '提現金額',
+      hintText: '0.00',
+      keyboardType: const TextInputType.numberWithOptions(decimal: true),
+      inputFormatters: [
+        FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,8}')),
+      ],
+      suffixIcon: Padding(
+        padding: const EdgeInsets.only(right: AppSpacing.md),
+        child: Text(
+          'USDT',
+          style: AppTextStyles.bodyMedium(context).copyWith(
+            color: colorScheme.onSurfaceVariant,
+            fontWeight: FontWeight.w500,
+          ),
         ),
       ),
-      padding: const EdgeInsets.symmetric(horizontal: 16),
-      child: Row(
-        children: [
-          Expanded(
-            child: TextField(
-              controller: _amountController,
-              focusNode: _amountFocus,
-              keyboardType:
-                  const TextInputType.numberWithOptions(decimal: true),
-              inputFormatters: [
-                FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,8}')),
-              ],
-              style: TextStyle(
-                fontSize: 24,
-                fontWeight: FontWeight.w600,
-                color: colorScheme.onSurface,
-              ),
-              decoration: InputDecoration(
-                hintText: '0.00',
-                hintStyle: TextStyle(
-                  fontSize: 24,
-                  fontWeight: FontWeight.w600,
-                  color:
-                      colorScheme.onSurfaceVariant.withValues(alpha: 0.3),
-                ),
-                border: InputBorder.none,
-                contentPadding: EdgeInsets.zero,
-                isDense: true,
-              ),
-            ),
-          ),
-          Text(
-            'USDT',
-            style: AppTextStyles.bodyMedium(context).copyWith(
-              color: colorScheme.onSurfaceVariant,
-              fontWeight: FontWeight.w500,
-            ),
-          ),
-        ],
-      ),
     );
   }
 
@@ -352,62 +313,18 @@ class _WithdrawPageState extends State<WithdrawPage> {
   }
 
   Widget _buildAddressInput(ColorScheme colorScheme) {
-    return Container(
-      width: double.infinity,
-      height: 48,
-      decoration: BoxDecoration(
-        color: colorScheme.surface,
-        borderRadius: BorderRadius.circular(14),
-        border: Border.all(
-          color: colorScheme.outlineVariant.withValues(alpha: 0.5),
-          width: 1,
-        ),
-      ),
-      padding: const EdgeInsets.symmetric(horizontal: 16),
-      alignment: Alignment.center,
-      child: TextField(
-        controller: _addressController,
-        style: AppTextStyles.bodyMedium(context),
-        decoration: InputDecoration(
-          hintText: '請輸入提現地址',
-          hintStyle: AppTextStyles.bodyMedium(context).copyWith(
-            color: colorScheme.onSurfaceVariant.withValues(alpha: 0.5),
-          ),
-          border: InputBorder.none,
-          contentPadding: EdgeInsets.zero,
-          isDense: true,
-        ),
-      ),
+    return MaterialInput(
+      controller: _addressController,
+      labelText: '目標地址',
+      hintText: '請輸入提現地址',
     );
   }
 
   Widget _buildContactInput(ColorScheme colorScheme) {
-    return Container(
-      width: double.infinity,
-      height: 48,
-      decoration: BoxDecoration(
-        color: colorScheme.surface,
-        borderRadius: BorderRadius.circular(14),
-        border: Border.all(
-          color: colorScheme.outlineVariant.withValues(alpha: 0.5),
-          width: 1,
-        ),
-      ),
-      padding: const EdgeInsets.symmetric(horizontal: 16),
-      alignment: Alignment.center,
-      child: TextField(
-        controller: _contactController,
-        style: AppTextStyles.bodyMedium(context),
-        decoration: InputDecoration(
-          hintText: '方便客服與您聯繫',
-          hintStyle: AppTextStyles.bodyMedium(context).copyWith(
-            color: colorScheme.onSurfaceVariant.withValues(alpha: 0.5),
-          ),
-          border: InputBorder.none,
-          contentPadding: EdgeInsets.zero,
-          isDense: true,
-        ),
-      ),
+    return MaterialInput(
+      controller: _contactController,
+      labelText: '聯繫方式（可選）',
+      hintText: '方便客服與您聯繫',
     );
   }