fix(c2c): 发布页绿积分输入框和预估卡片单位标签修正

- 第二个输入框后缀 "积分值" → "绿积分"
- 预估卡片第二行标签 "积分值数量" → "绿积分数量"，单位 → "绿积分"

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

frontend/mining-app/lib/presentation/pages/c2c/c2c_publish_page.dart

@@ -378,7 +378,7 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
                 borderRadius: BorderRadius.circular(12),
                 borderSide: const BorderSide(color: _orange, width: 2),
               ),
-              suffixText: '积分值',
+              suffixText: '绿积分',
               suffixStyle: const TextStyle(color: _grayText, fontSize: 14),
             ),
             onChanged: (val) {
@@ -680,9 +680,9 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
           Row(
             mainAxisAlignment: MainAxisAlignment.spaceBetween,
             children: [
-              const Text('积分值数量', style: TextStyle(fontSize: 14, color: _grayText)),
+              const Text('绿积分数量', style: TextStyle(fontSize: 14, color: _grayText)),
               Text(
-                '${formatCompact(quantity.toString())} 积分值',
+                '${formatCompact(quantity.toString())} 绿积分',
                 style: const TextStyle(
                   fontSize: 14,
                   fontWeight: FontWeight.bold,