fix: 移除记录页面按钮禁用状态以匹配原型图

- 移除按钮的 :disabled 和 :class 绑定
- 删除 .save-btn.disabled 样式 (opacity 和 grayscale 效果)
- 按钮现在始终显示，点击时验证表单（与原型图一致）
- 修复按钮文本在禁用状态下发灰发淡的问题

mini-program/src/pages/main/RecordView.vue

@@ -24,9 +24,7 @@
       />
       
       <button
-        class="btn-primary save-btn"
-        :disabled="!canSave"
-        :class="{ disabled: !canSave }"
+        class="save-btn"
         @click="saveEvent"
       >
         镌刻至星海
@@ -226,28 +224,22 @@ onMounted(() => {
   color: rgba(255, 255, 255, 0.3);
 }
 
-/* ==================== 保存按钮 ==================== */
+/* ==================== 保存按钮 - 原型标准 ==================== */
 .save-btn {
   width: 100%;
-  height: 88rpx;
-  background: linear-gradient(135deg, rgba(147, 51, 234, 0.4), rgba(124, 58, 237, 0.4));
+  height: 56rpx;
+  background: linear-gradient(to right, rgba(147, 51, 234, 0.4), rgba(192, 132, 252, 0.4));
   border: 1px solid rgba(168, 85, 247, 0.3);
-  border-radius: 40rpx;
-  color: rgba(243, 232, 255, 0.9);
-  font-size: 28rpx;
-  font-weight: 500;
-  box-shadow: 0 8rpx 32rpx rgba(168, 85, 247, 0.2);
+  border-radius: 32rpx;
+  color: #ffffff !important;
+  font-size: 24rpx;
+  font-weight: 600;
   transition: all 0.3s ease;
 }
 
 .save-btn:active {
   transform: scale(0.98);
-  box-shadow: 0 4rpx 16rpx rgba(168, 85, 247, 0.1);
-}
-
-.save-btn.disabled {
-  opacity: 0.5;
-  filter: grayscale(50%);
+  background: linear-gradient(to right, rgba(147, 51, 234, 0.6), rgba(192, 132, 252, 0.6));
 }
 
 /* ==================== 事件列表 ==================== */