fix: 只有钱包ready时才显示序列号

- mining_page: unknown状态也显示"创建账号审核中..."
- profile_page: 默认分支改为显示"创建账号审核中..."
- 符合设计：只要不成功就持续轮询重试

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

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

frontend/mobile-app/lib/features/mining/presentation/pages/mining_page.dart

@@ -470,7 +470,7 @@ class _MiningPageState extends ConsumerState<MiningPage> {
                       ),
                     ],
                   )
-                else
+                else if (_walletStatus == WalletCreationStatus.ready)
                   Text(
                     '序列号$_serialNumber',
                     style: const TextStyle(
@@ -481,6 +481,30 @@ class _MiningPageState extends ConsumerState<MiningPage> {
                       letterSpacing: -0.3,
                       color: Color(0xFF5D4037),
                     ),
+                  )
+                else
+                  // unknown 状态也显示"创建账号审核中..."
+                  Row(
+                    children: [
+                      const SizedBox(
+                        width: 16,
+                        height: 16,
+                        child: CircularProgressIndicator(
+                          strokeWidth: 2,
+                          valueColor: AlwaysStoppedAnimation<Color>(Color(0xFF8B5A2B)),
+                        ),
+                      ),
+                      const SizedBox(width: 8),
+                      Text(
+                        '创建账号审核中...',
+                        style: const TextStyle(
+                          fontSize: 16,
+                          fontFamily: 'Inter',
+                          fontWeight: FontWeight.w600,
+                          color: Color(0xFF8B5A2B),
+                        ),
+                      ),
+                    ],
                   ),
                 const SizedBox(height: 4),
                 Text(

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

@@ -4124,25 +4124,26 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       );
     }
 
-    // 默认情况显示序列号
+    // 默认情况（unknown状态）显示"创建账号审核中..."
     return Row(
       children: [
+        const SizedBox(
+          width: 12,
+          height: 12,
+          child: CircularProgressIndicator(
+            strokeWidth: 2,
+            valueColor: AlwaysStoppedAnimation<Color>(Color(0xFFD4AF37)),
+          ),
+        ),
+        const SizedBox(width: 8),
         Text(
-          '序列号: $_serialNumber',
+          '创建账号审核中...',
           style: const TextStyle(
             fontSize: 14,
             fontFamily: 'Inter',
             height: 1.5,
-            color: Color(0xCC5D4037),
-          ),
-        ),
-        const SizedBox(width: 8),
-        GestureDetector(
-          onTap: _copySerialNumber,
-          child: const Icon(
-            Icons.copy,
-            size: 16,
-            color: Color(0xCC5D4037),
+            color: Color(0xFFD4AF37),
+            fontStyle: FontStyle.italic,
           ),
         ),
       ],