feat: Add Scoreboard and Date Calc pages, update Calculator with scientific mode and new UI

codes/minipro/calculation/miniprogram/pages/index/index.ts

@@ -68,6 +68,18 @@ Component({
         wx.navigateTo({
             url: '/pages/random-draw/random-draw'
         });
+    },
+
+    goToScoreboard() {
+        wx.navigateTo({
+            url: '/pages/scoreboard/scoreboard'
+        });
+    },
+
+    goToDateCalc() {
+        wx.navigateTo({
+            url: '/pages/date-calc/date-calc'
+        });
     }
   }
 })

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

@@ -53,6 +53,28 @@
                     <text class="sub-label">随机抽取幸运儿</text>
                 </view>
             </view>
+
+             <!-- 记分板 -->
+            <view class="grid-item" bindtap="goToScoreboard" hover-class="grid-item-hover">
+                <view class="icon-box bg-gradient-orange">
+                    <text class="icon">📝</text>
+                </view>
+                <view class="text-box">
+                    <text class="label">万能记分板</text>
+                    <text class="sub-label">桌游/比赛记分</text>
+                </view>
+            </view>
+
+             <!-- 日期计算 -->
+            <view class="grid-item" bindtap="goToDateCalc" hover-class="grid-item-hover">
+                <view class="icon-box bg-gradient-pink">
+                    <text class="icon">📅</text>
+                </view>
+                <view class="text-box">
+                    <text class="label">日期计算</text>
+                    <text class="sub-label">天数推算</text>
+                </view>
+            </view>
         </view>
 
         <!-- 推广/banner区域 -->

codes/minipro/calculation/miniprogram/pages/index/index.wxss

@@ -140,6 +140,7 @@ page {
 .bg-gradient-green { background: #e8f5e9; color: #4caf50; }
 .bg-gradient-orange { background: #fff3e0; color: #ff9800; }
 .bg-gradient-purple { background: #f3e5f5; color: #9c27b0; }
+.bg-gradient-pink { background: #ffebee; color: #e91e63; }
 
 .text-box {
     display: flex;