feat(home): 修复swiper动画、宜忌布局、月历显示、节日速查

1. 修复swiper箭头点击动画丢失问题
   - 改用固定7天窗口，滑动到边缘时整体滚动数据
   - 保持dayIndex连续，确保swiper平滑动画

2. 修复宜忌两行显示压在一起
   - 设置item固定高度32rpx和行距12rpx
   - 超出2行显示...省略号

3. 修复月历数字竖向排列问题
   - 修正wxml嵌套结构，让42个格子正确排成6行7列
   - 压缩格子高度，放大数字字体

4. 节日速查功能优化
   - 默认显示3条，右侧添加更多

server/internal/service/wiki.go

@@ -0,0 +1,148 @@
+package service
+
+import (
+	"errors"
+
+	"github.com/gouki/lunar-server/internal/config"
+	"github.com/gouki/lunar-server/internal/model"
+	"gorm.io/gorm"
+)
+
+// WikiService 百科服务
+type WikiService struct {
+	db *gorm.DB
+}
+
+// NewWikiService 创建百科服务
+func NewWikiService() *WikiService {
+	return &WikiService{db: config.GetDB()}
+}
+
+// ListEntries 百科条目列表（status<0 表示不过滤状态，供管理后台使用）
+func (s *WikiService) ListEntries(category, keyword string, status int) ([]*model.WikiEntry, error) {
+	query := s.db.Model(&model.WikiEntry{})
+	if status >= 0 {
+		query = query.Where("status = ?", status)
+	}
+	if category != "" {
+		query = query.Where("category = ?", category)
+	}
+	if keyword != "" {
+		like := "%" + keyword + "%"
+		query = query.Where("title LIKE ? OR brief LIKE ? OR content LIKE ?", like, like, like)
+	}
+
+	var entries []*model.WikiEntry
+	if err := query.Order("sort ASC, id ASC").Find(&entries).Error; err != nil {
+		return nil, err
+	}
+	return entries, nil
+}
+
+// CreateEntry 新增百科条目
+func (s *WikiService) CreateEntry(entry *model.WikiEntry) error {
+	if entry.Category == "" || entry.Title == "" {
+		return errors.New("分类和标题不能为空")
+	}
+	if entry.Status == 0 {
+		entry.Status = 1
+	}
+	return s.db.Create(entry).Error
+}
+
+// UpdateEntry 更新百科条目
+func (s *WikiService) UpdateEntry(id uint, entry *model.WikiEntry) error {
+	var existing model.WikiEntry
+	if err := s.db.First(&existing, id).Error; err != nil {
+		return err
+	}
+	return s.db.Model(&existing).Updates(map[string]interface{}{
+		"category": entry.Category,
+		"title":    entry.Title,
+		"brief":    entry.Brief,
+		"content":  entry.Content,
+		"sort":     entry.Sort,
+		"status":   entry.Status,
+	}).Error
+}
+
+// DeleteEntry 删除百科条目
+func (s *WikiService) DeleteEntry(id uint) error {
+	return s.db.Delete(&model.WikiEntry{}, id).Error
+}
+
+// OnThisDayResult 某一天的历史数据
+type OnThisDayResult struct {
+	Events    []model.WikiOnThisDay `json:"events"`
+	Births    []model.WikiOnThisDay `json:"births"`
+	Deaths    []model.WikiOnThisDay `json:"deaths"`
+	Festivals []model.WikiOnThisDay `json:"festivals"`
+}
+
+// GetOnThisDay 查询某一天的历史上的今天数据（各板块限量返回）
+func (s *WikiService) GetOnThisDay(month, day int) (*OnThisDayResult, error) {
+	if month < 1 || month > 12 || day < 1 || day > 31 {
+		return nil, errors.New("日期参数无效")
+	}
+
+	var all []model.WikiOnThisDay
+	if err := s.db.Where("month = ? AND day = ? AND status = 1", month, day).
+		Order("year ASC, id ASC").
+		Find(&all).Error; err != nil {
+		return nil, err
+	}
+
+	result := &OnThisDayResult{
+		Events:    make([]model.WikiOnThisDay, 0),
+		Births:    make([]model.WikiOnThisDay, 0),
+		Deaths:    make([]model.WikiOnThisDay, 0),
+		Festivals: make([]model.WikiOnThisDay, 0),
+	}
+	limits := map[string]int{"event": 20, "birth": 15, "death": 10, "festival": 10}
+	for _, item := range all {
+		switch item.Kind {
+		case "event":
+			if len(result.Events) < limits["event"] {
+				result.Events = append(result.Events, item)
+			}
+		case "birth":
+			if len(result.Births) < limits["birth"] {
+				result.Births = append(result.Births, item)
+			}
+		case "death":
+			if len(result.Deaths) < limits["death"] {
+				result.Deaths = append(result.Deaths, item)
+			}
+		case "festival":
+			if len(result.Festivals) < limits["festival"] {
+				result.Festivals = append(result.Festivals, item)
+			}
+		}
+	}
+	return result, nil
+}
+
+// SyncStatus 同步状态（管理后台展示）
+type SyncStatus struct {
+	Running    bool               `json:"running"`
+	TotalDays  int64              `json:"totalDays"`  // 已覆盖的天数
+	TotalItems int64              `json:"totalItems"` // 总条目数
+	LastSync   *model.WikiSyncLog `json:"lastSync"`
+}
+
+// GetSyncStatus 获取同步状态
+func (s *WikiService) GetSyncStatus(running bool) (*SyncStatus, error) {
+	status := &SyncStatus{Running: running}
+
+	var totalDays int64
+	s.db.Model(&model.WikiOnThisDay{}).Where("status = 1").
+		Select("COUNT(DISTINCT month, day) AS c").Scan(&totalDays)
+	status.TotalDays = totalDays
+	s.db.Model(&model.WikiOnThisDay{}).Where("status = 1").Count(&status.TotalItems)
+
+	var lastSync model.WikiSyncLog
+	if err := s.db.Order("id DESC").First(&lastSync).Error; err == nil {
+		status.LastSync = &lastSync
+	}
+	return status, nil
+}