fix(withdraw): 修改提款页面文字并暂时屏蔽BSC网络

- 屏蔽 BSC (BNB Chain) 网络选项
- "提款地址" → "接收地址"
- "请输入 KAVA 或 EVM 地址" → "请输入接收积分的地址"
- "提款金额" → "积分提取数量"
- "请输入提款金额" → "请输入积分数量"
- "最小提款金额" → "最小提取数量"
- 注意事项中的"提款"改为"提取"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mobile-app/lib/features/withdraw/presentation/pages/withdraw_usdt_page.dart

@@ -131,7 +131,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
 
     // 验证地址
     if (address.isEmpty) {
-      _showErrorSnackBar('请输入提款地址');
+      _showErrorSnackBar('请输入接收地址');
       return;
     }
 
@@ -143,7 +143,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
 
     // 验证金额
     if (amountText.isEmpty) {
-      _showErrorSnackBar('请输入提款金额');
+      _showErrorSnackBar('请输入积分数量');
       return;
     }
 
@@ -154,7 +154,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
     }
 
     if (amount < _minAmount) {
-      _showErrorSnackBar('最小提款金额为 $_minAmount 积分');
+      _showErrorSnackBar('最小提取数量为 $_minAmount 积分');
       return;
     }
 
@@ -458,8 +458,9 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
         ),
         const SizedBox(height: 12),
         _buildNetworkOption(WithdrawNetwork.kava),
-        const SizedBox(height: 12),
+        // TODO: BSC 网络暂时屏蔽，待开放后取消注释
-        _buildNetworkOption(WithdrawNetwork.bsc),
+        // const SizedBox(height: 12),
+        // _buildNetworkOption(WithdrawNetwork.bsc),
       ],
     );
   }
@@ -541,7 +542,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         const Text(
-          '提款地址',
+          '接收地址',
           style: TextStyle(
             fontSize: 16,
             fontFamily: 'Inter',
@@ -578,9 +579,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
             decoration: InputDecoration(
               contentPadding: const EdgeInsets.all(16),
               border: InputBorder.none,
-              hintText: _selectedNetwork == WithdrawNetwork.kava
+              hintText: '请输入接收积分的地址',
-                  ? '请输入 KAVA 或 EVM 地址'
-                  : '请输入 BSC 地址 (0x...)',
               hintStyle: const TextStyle(
                 fontSize: 14,
                 fontFamily: 'Inter',
@@ -611,7 +610,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
           mainAxisAlignment: MainAxisAlignment.spaceBetween,
           children: [
             const Text(
-              '提款金额',
+              '积分提取数量',
               style: TextStyle(
                 fontSize: 16,
                 fontFamily: 'Inter',
@@ -668,7 +667,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
             decoration: const InputDecoration(
               contentPadding: EdgeInsets.all(16),
               border: InputBorder.none,
-              hintText: '请输入提款金额',
+              hintText: '请输入积分数量',
               hintStyle: TextStyle(
                 fontSize: 16,
                 fontFamily: 'Inter',
@@ -687,7 +686,7 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
         ),
         const SizedBox(height: 8),
         Text(
-          '最小提款金额: $_minAmount 积分',
+          '最小提取数量: $_minAmount 积分',
           style: const TextStyle(
             fontSize: 12,
             fontFamily: 'Inter',
@@ -835,10 +834,10 @@ class _WithdrawUsdtPageState extends ConsumerState<WithdrawUsdtPage> {
             ],
           ),
           const SizedBox(height: 12),
-          _buildNoticeItem('请确保提款地址正确，错误地址将导致资产丢失'),
+          _buildNoticeItem('请确保接收地址正确，错误地址将导致资产丢失'),
           _buildNoticeItem('请选择正确的网络，不同网络之间不可互转'),
-          _buildNoticeItem('提款需要进行谷歌验证器验证'),
+          _buildNoticeItem('提取需要进行谷歌验证器验证'),
-          _buildNoticeItem('提款通常在 1-30 分钟内到账'),
+          _buildNoticeItem('提取通常在 1-30 分钟内到账'),
         ],
       ),
     );