feat: 添加任务状态级联触发器，优化支付和做同款功能

主要更新:
- 添加 MySQL 触发器实现 task_status 表到其他表的状态级联
- 移除控制器中的多表状态检查代码
- 完善做同款功能，支持参数传递
- 支付宝 USD 转 CNY 汇率转换
- 修复状态枚举映射问题

注意: 触发器仅在 task_status 更新时触发，部分代码仍直接更新业务表

demo/frontend/src/components/TaskStatusDisplay.vue

@@ -8,13 +8,19 @@
     </div>
     
     <div class="progress-section" v-if="taskStatus">
-      <div class="progress-bar">
+      <!-- 排队中：不确定进度条 -->
+      <div v-if="taskStatus.status === 'PENDING'" class="progress-bar indeterminate">
+        <div class="progress-fill-indeterminate"></div>
+      </div>
+      <!-- 生成中：动态进度条 -->
+      <div v-else class="progress-bar">
         <div 
-          class="progress-fill" 
+          class="progress-fill animated" 
           :style="{ width: taskStatus.progress + '%' }"
         ></div>
       </div>
-      <div class="progress-text">{{ taskStatus.progress }}%</div>
+      <div class="progress-text" v-if="taskStatus.status !== 'PENDING'">{{ taskStatus.progress }}%</div>
+      <div class="progress-text" v-else>排队中...</div>
     </div>
     
     <div class="task-info">
@@ -283,6 +289,59 @@ onUnmounted(() => {
   height: 100%;
   background: linear-gradient(90deg, #3b82f6, #1d4ed8);
   transition: width 0.3s ease;
+  position: relative;
+}
+
+/* 动态进度条动画 */
+.progress-fill.animated {
+  background: linear-gradient(90deg, #3b82f6, #60a5fa, #3b82f6);
+  background-size: 200% 100%;
+  animation: progress-gradient 2s ease infinite, progress-pulse 1.5s ease-in-out infinite;
+}
+
+.progress-fill.animated::after {
+  content: '';
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
+  animation: progress-shine 1.5s ease-in-out infinite;
+}
+
+@keyframes progress-gradient {
+  0% { background-position: 0% 50%; }
+  50% { background-position: 100% 50%; }
+  100% { background-position: 0% 50%; }
+}
+
+@keyframes progress-pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.85; }
+}
+
+@keyframes progress-shine {
+  0% { transform: translateX(-100%); }
+  100% { transform: translateX(100%); }
+}
+
+/* 不确定进度条（排队中） */
+.progress-bar.indeterminate {
+  overflow: hidden;
+}
+
+.progress-fill-indeterminate {
+  width: 30%;
+  height: 100%;
+  background: linear-gradient(90deg, transparent, #3b82f6, #60a5fa, #3b82f6, transparent);
+  border-radius: 4px;
+  animation: indeterminate-slide 1.5s ease-in-out infinite;
+}
+
+@keyframes indeterminate-slide {
+  0% { transform: translateX(-100%); }
+  100% { transform: translateX(400%); }
 }
 
 .progress-text {