feat: 实现微博签到小程序功能

- 实现签到主页面，包含签到按钮、连续天数、今日状态展示
- 实现签到记录页面，包含日历视图和签到历史列表
- 实现个人中心页面，包含用户信息和签到统计
- 后端实现签到、查询状态、查询历史三个接口
- 使用 Supabase 存储签到记录数据
- 采用星空主题设计，深蓝紫渐变背景 + 金色星光强调色
- 完成所有接口测试和前后端匹配验证
- 通过 ESLint 检查和编译验证

server/src/signin/signin.service.ts

@@ -0,0 +1,148 @@
+import { Injectable } from '@nestjs/common';
+import { getSupabaseClient } from '@/storage/database/supabase-client';
+
+@Injectable()
+export class SignInService {
+  /**
+   * 用户签到
+   */
+  async signIn(userId: string) {
+    const client = getSupabaseClient();
+    const today = new Date().toISOString().split('T')[0]; // YYYY-MM-DD
+
+    // 检查今日是否已签到
+    const { data: existingRecord } = await client
+      .from('sign_in_records')
+      .select('*')
+      .eq('user_id', userId)
+      .eq('sign_date', today)
+      .single();
+
+    if (existingRecord) {
+      return {
+        code: 400,
+        msg: '今日已签到',
+        data: null,
+      };
+    }
+
+    // 创建签到记录
+    const { data, error } = await client
+      .from('sign_in_records')
+      .insert({
+        user_id: userId,
+        sign_date: today,
+      })
+      .select()
+      .single();
+
+    if (error) {
+      console.error('签到失败:', error);
+      return {
+        code: 500,
+        msg: '签到失败',
+        data: null,
+      };
+    }
+
+    return {
+      code: 200,
+      msg: '签到成功',
+      data,
+    };
+  }
+
+  /**
+   * 获取签到状态
+   */
+  async getSignInStatus(userId: string) {
+    const client = getSupabaseClient();
+    const today = new Date().toISOString().split('T')[0];
+
+    // 检查今日是否已签到
+    const { data: todayRecord } = await client
+      .from('sign_in_records')
+      .select('*')
+      .eq('user_id', userId)
+      .eq('sign_date', today)
+      .single();
+
+    // 获取所有签到记录
+    const { data: allRecords } = await client
+      .from('sign_in_records')
+      .select('sign_date')
+      .eq('user_id', userId)
+      .order('sign_date', { ascending: false });
+
+    const totalDays = allRecords?.length || 0;
+
+    // 计算连续签到天数
+    let continuousDays = 0;
+    if (allRecords && allRecords.length > 0) {
+      const dates = allRecords.map((r) => r.sign_date).sort().reverse();
+      continuousDays = this.calculateContinuousDays(dates, today);
+    }
+
+    return {
+      code: 200,
+      msg: 'success',
+      data: {
+        todaySignedIn: !!todayRecord,
+        continuousDays,
+        totalDays,
+      },
+    };
+  }
+
+  /**
+   * 计算连续签到天数
+   */
+  private calculateContinuousDays(dates: string[], today: string): number {
+    let continuousDays = 0;
+    let checkDate = new Date(today);
+
+    for (const dateStr of dates) {
+      const date = new Date(dateStr);
+      const diffTime = checkDate.getTime() - date.getTime();
+      const diffDays = Math.floor(diffTime / (1000 * 60 * 60 * 24));
+
+      if (diffDays === 0 || diffDays === 1) {
+        continuousDays++;
+        checkDate = date;
+      } else {
+        break;
+      }
+    }
+
+    return continuousDays;
+  }
+
+  /**
+   * 获取签到历史记录
+   */
+  async getSignInHistory(userId: string, limit: number = 30) {
+    const client = getSupabaseClient();
+
+    const { data, error } = await client
+      .from('sign_in_records')
+      .select('*')
+      .eq('user_id', userId)
+      .order('sign_date', { ascending: false })
+      .limit(limit);
+
+    if (error) {
+      console.error('获取签到历史失败:', error);
+      return {
+        code: 500,
+        msg: '获取签到历史失败',
+        data: null,
+      };
+    }
+
+    return {
+      code: 200,
+      msg: 'success',
+      data,
+    };
+  }
+}