Refactor: UI & Feature updates (Calculator, UnitConverter, Privacy, Cleanup)

codes/minipro/calculation/miniprogram/pages/discount/discount.wxml

@@ -0,0 +1,28 @@
+<view class="container">
+  <view class="card">
+    <view class="input-group">
+      <view class="label">原价 (元)</view>
+      <input type="digit" placeholder="请输入商品原价" bindinput="bindOriginalInput" value="{{originalPrice}}" />
+    </view>
+    <view class="divider"></view>
+    <view class="input-group">
+      <view class="label">折扣 (折)</view>
+      <input type="digit" placeholder="例如: 8.5" bindinput="bindDiscountInput" value="{{discount}}" />
+    </view>
+  </view>
+
+  <view class="result-card">
+    <view class="result-row">
+      <text class="result-label">折后价</text>
+      <text class="result-value">¥ {{finalPrice}}</text>
+    </view>
+    <view class="result-row sub-result">
+      <text class="result-label">为您节省</text>
+      <text class="result-value">¥ {{savedMoney}}</text>
+    </view>
+  </view>
+  
+  <view class="tips">
+    <text>输入提示：输入 9 代表 9 折，8.5 代表 85 折</text>
+  </view>
+</view>