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

codes/minipro/calculation/miniprogram/pages/date-calc/date-calc.ts

@@ -0,0 +1,112 @@
+// pages/date-calc/date-calc.ts
+Page({
+  data: {
+    currentTab: 0,
+    startDate: '',
+    startWeekday: '', // 新增：开始日期的星期
+    endDate: '',
+    days: 0, // 可以为空字符串以便清空输入框，但 input type number 会处理
+    resultDate: '',
+    resultWeekday: '',
+    intervalDays: 0,
+    intervalWeeks: 0,
+    intervalRemainingDays: 0
+  },
+
+  onLoad() {
+    const today = new Date();
+    const dateStr = this.formatDate(today);
+    this.setData({
+      startDate: dateStr,
+      endDate: dateStr,
+      resultDate: dateStr,
+      resultWeekday: this.getWeekday(today),
+      startWeekday: this.getWeekday(today)
+    });
+  },
+
+  switchTab(e: any) {
+    this.setData({
+      currentTab: parseFloat(e.currentTarget.dataset.index)
+    });
+    this.calculate(); // 切换时重新计算
+  },
+
+  bindDateChange(e: any) {
+    const field = e.currentTarget.dataset.field;
+    this.setData({
+      [field]: e.detail.value
+    });
+    
+    // 如果修改的是开始日期，同步更新星期显示
+    if (field === 'startDate') {
+        const d = new Date(e.detail.value);
+        this.setData({ startWeekday: this.getWeekday(d) });
+    }
+
+    this.calculate();
+  },
+
+  bindDaysInput(e: any) {
+    const val = e.detail.value;
+    // 允许输入负号
+    if (val === '-' || val === '') {
+        this.setData({ days: val });
+        return;
+    }
+    this.setData({
+      days: parseInt(val)
+    });
+    this.calculate();
+  },
+
+  setDays(e: any) {
+      const days = parseInt(e.currentTarget.dataset.days);
+      this.setData({ days: days });
+      this.calculate();
+  },
+
+  calculate() {
+    if (this.data.currentTab === 0) {
+      // 日期推算
+      // 注意：直接使用 new Date('2023-10-01') 在 iOS 上可能不兼容，应替换为 '/'
+      const start = new Date(this.data.startDate.replace(/-/g, '/'));
+      // days 可能是字符串或数字
+      const dayOffset = typeof(this.data.days) === 'number' ? this.data.days : parseInt(this.data.days || '0');
+      
+      const target = new Date(start.getTime() + dayOffset * 24 * 60 * 60 * 1000);
+      
+      this.setData({
+        resultDate: this.formatDate(target),
+        resultWeekday: this.getWeekday(target)
+      });
+    } else {
+      // 日期通过 (Interval)
+      const start = new Date(this.data.startDate.replace(/-/g, '/'));
+      const end = new Date(this.data.endDate.replace(/-/g, '/'));
+      const diffTime = Math.abs(end.getTime() - start.getTime());
+      const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24)); 
+      
+      const weeks = Math.floor(diffDays / 7);
+      const remainingDays = diffDays % 7;
+
+      this.setData({
+        intervalDays: diffDays,
+        intervalWeeks: weeks,
+        intervalRemainingDays: remainingDays
+      });
+    }
+  },
+
+  formatDate(date: Date): string {
+    const y = date.getFullYear();
+    const m = (date.getMonth() + 1).toString().padStart(2, '0');
+    const d = date.getDate().toString().padStart(2, '0');
+    return `${y}-${m}-${d}`;
+  },
+
+  getWeekday(date: Date): string {
+    const days = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
+    return days[date.getDay()];
+  }
+})