优化移动导出视图的样式和功能，替换下载图标为打印图标，并调整标题和按钮的布局与样式。

src/index.css

@@ -714,14 +714,7 @@ body,
   }
 
   .mobile-export-header {
-    display: flex;
-    align-items: center;
-    gap: 8px;
-    padding: 10px 12px;
-    padding-top: calc(10px + env(safe-area-inset-top, 0px));
-    background: #fff;
-    border-bottom: 1px solid #e2e8f0;
-    flex-shrink: 0;
+    padding-top: calc(12px + env(safe-area-inset-top, 0px));
   }
 
   .mobile-export-back {
@@ -734,26 +727,13 @@ body,
     border: none;
     border-radius: 10px;
     background: transparent;
-    color: #334155;
+    color: #e2e8f0;
     cursor: pointer;
     flex-shrink: 0;
   }
 
   .mobile-export-back:active {
-    background: #f1f5f9;
-  }
-
-  .mobile-export-title {
-    font-size: 15px;
-    font-weight: 700;
-    color: #0f172a;
-    line-height: 1.2;
-  }
-
-  .mobile-export-subtitle {
-    font-size: 12px;
-    color: #64748b;
-    margin-top: 2px;
+    background: rgba(255, 255, 255, 0.1);
   }
 
   .mobile-export-steps {
@@ -1168,13 +1148,17 @@ body,
 
   .mobile-template-actions {
     width: 100%;
+    flex-wrap: nowrap;
+    gap: 10px;
   }
 
   .mobile-template-actions .mobile-primary-btn {
-    width: 100%;
-    justify-content: center;
-    min-height: 44px;
-    font-size: 13px;
+    flex: 1;
+    min-width: 0;
+  }
+
+  .mobile-template-actions .mobile-icon-btn:active {
+    transform: scale(0.97);
   }
 
   .mobile-design-block {