feat: 优化签到进度显示

- 连续签到几天，前几个图标变亮
- 下面的星期几显示对应签到日期的星期
- 添加currentStreak计算属性

xuan-deduct-uniapp/src/pages/mine/coins.vue

@@ -16,7 +16,7 @@
       
       <view class="week-progress">
         <view class="day-item" v-for="(day, index) in weekDays" :key="index">
-          <view class="day-circle" :class="{ signed: day.signed, today: day.isToday }">
+          <view class="day-circle" :class="{ signed: index < currentStreak, today: index === currentStreak - 1 && signedToday }">
             <text class="day-num">{{ index + 1 }}</text>
           </view>
           <text class="day-label">{{ day.label }}</text>
@@ -116,6 +116,9 @@ export default {
   computed: {
     todayReward() {
       return this.getDayReward(this.streakDays % 7)
+    },
+    currentStreak() {
+      return this.streakDays % 7 || (this.streakDays > 0 ? 7 : 0)
     }
   },
   onShow() {
@@ -153,7 +156,6 @@ export default {
     },
     initWeekProgress() {
       const today = new Date()
-      const dayOfWeek = today.getDay()
       const weekLabels = ['日', '一', '二', '三', '四', '五', '六']
       
       const lastSignInStr = uni.getStorageSync('lastSignInDate')
@@ -163,20 +165,14 @@ export default {
       const todayStr = this.formatDate(today)
       this.signedToday = lastSignInStr === todayStr
       
-      const signInHistory = uni.getStorageSync('signInHistory') || '{}'
-      const history = JSON.parse(signInHistory)
-      
       this.weekDays = []
       for (let i = 0; i < 7; i++) {
         const date = new Date(today)
-        date.setDate(today.getDate() - dayOfWeek + i)
-        const dateStr = this.formatDate(date)
+        date.setDate(today.getDate() - (this.currentStreak - 1 - i))
         
         this.weekDays.push({
-          label: weekLabels[i],
-          signed: history[dateStr] === true,
-          isToday: i === dayOfWeek,
-          date: dateStr
+          label: weekLabels[date.getDay()],
+          date: this.formatDate(date)
         })
       }
     },