fix(ui): 隐藏我的页面的 '进入交易' 按钮

- 注释掉 '进入交易 (卖出 DST → 积分)' 按钮
- 代码保留在程序中，便于后续恢复

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

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

frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart

@@ -2142,32 +2142,32 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             ),
           ),
         ),
-        const SizedBox(height: 12),
-        // 进入交易按钮
-        GestureDetector(
-          onTap: _goToTrading,
-          child: Container(
-            width: double.infinity,
-            height: 48,
-            decoration: BoxDecoration(
-              color: const Color(0xFF8B5A2B),
-              borderRadius: BorderRadius.circular(8),
-            ),
-            child: const Center(
-              child: Text(
-                '进入交易 (卖出 DST → 积分)',
-                style: TextStyle(
-                  fontSize: 16,
-                  fontFamily: 'Inter',
-                  fontWeight: FontWeight.w700,
-                  height: 1.5,
-                  letterSpacing: 0.24,
-                  color: Colors.white,
-                ),
-              ),
-            ),
-          ),
-        ),
+        // 进入交易按钮（暂时隐藏）
+        // const SizedBox(height: 12),
+        // GestureDetector(
+        //   onTap: _goToTrading,
+        //   child: Container(
+        //     width: double.infinity,
+        //     height: 48,
+        //     decoration: BoxDecoration(
+        //       color: const Color(0xFF8B5A2B),
+        //       borderRadius: BorderRadius.circular(8),
+        //     ),
+        //     child: const Center(
+        //       child: Text(
+        //         '进入交易 (卖出 DST → 积分)',
+        //         style: TextStyle(
+        //           fontSize: 16,
+        //           fontFamily: 'Inter',
+        //           fontWeight: FontWeight.w700,
+        //           height: 1.5,
+        //           letterSpacing: 0.24,
+        //           color: Colors.white,
+        //         ),
+        //       ),
+        //     ),
+        //   ),
+        // ),
       ],
     );
   }