提升版本并调整抢购默认设置

frontend/src/components/modal/SettingsModal.vue

@@ -10,7 +10,7 @@ const formData = ref({
   traceEnabled: false,
   traceMaxBody: 0,
   logLevel: 'info',
-  concurrency: 80,
+  concurrency: 150,
   attempts: 1,
   retryStages: [] as RetryStage[],
   seckillMode: 0
@@ -222,7 +222,7 @@ defineExpose({ open, close })
                 <div class="info-title">💡 抢购策略说明</div>
                 <ul class="info-list">
                   <li>抢购窗口：<strong>75 秒</strong>，自动循环重试</li>
-                  <li>默认：前 4 秒 180ms，12 秒内 450ms，之后快速降速</li>
+                  <li>默认：阶段 2 为 200ms，阶段 3 为 500ms，其余阶段 1000ms</li>
                   <li>尝试包数 &gt; 1 时，每轮使用不同的包</li>
                 </ul>
               </div>
@@ -258,7 +258,9 @@ defineExpose({ open, close })
   width: 520px;
   max-width: 92vw;
   max-height: 85vh;
-  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
   box-shadow: var(--shadow);
 }
 
@@ -268,6 +270,7 @@ defineExpose({ open, close })
   justify-content: space-between;
   padding: 16px 20px;
   border-bottom: 1px solid var(--line);
+  flex-shrink: 0;
 }
 
 .modal-header h3 {
@@ -301,6 +304,8 @@ defineExpose({ open, close })
 
 .modal-body {
   padding: 20px;
+  overflow-y: auto;
+  min-height: 0;
 }
 
 .form-section {
@@ -443,6 +448,8 @@ defineExpose({ open, close })
   display: flex;
   justify-content: flex-end;
   gap: 10px;
+  background: var(--surface);
+  flex-shrink: 0;
 }
 
 .info-card {