Enhance AI and Redis integration for smoke logging features

- Added AI configuration options to .env.example and config.go for OpenAI integration.
- Implemented Redis caching for session management in main.go and auth middleware.
- Updated smoke logging service to support real smoking time (`smoke_at`) and AI advice retrieval.
- Enhanced API routes to include endpoints for AI advice and unlock functionality for non-members.
- Improved database schema with new tables for AI advice and unlock records.
- Expanded documentation to cover new AI features and Redis caching implementation.

internal/smoke/service/smoke_log_service.go

@@ -25,6 +25,7 @@ func NewSmokeLogService(db *gorm.DB) *SmokeLogService {
 
 type CreateSmokeLogRequest struct {
 	SmokeTime *time.Time
+	SmokeAt   *time.Time
 	Remark    string
 	Level     int64
 	Num       int
@@ -44,7 +45,14 @@ func (s *SmokeLogService) Create(ctx context.Context, uid int, req CreateSmokeLo
 		num = 1
 	}
 
+	smokeAt := req.SmokeAt
+
+	// smokeTime 用于“按天筛选”；如果传了 smokeAt，建议用其日期部分回填 smokeTime，避免出现不一致。
 	smokeTime := req.SmokeTime
+	if smokeAt != nil {
+		day := time.Date(smokeAt.Year(), smokeAt.Month(), smokeAt.Day(), 0, 0, 0, 0, smokeAt.Location())
+		smokeTime = &day
+	}
 	if smokeTime == nil {
 		today := time.Now()
 		startOfDay := time.Date(today.Year(), today.Month(), today.Day(), 0, 0, 0, 0, today.Location())
@@ -54,6 +62,7 @@ func (s *SmokeLogService) Create(ctx context.Context, uid int, req CreateSmokeLo
 	record := smokemodel.SmokeLog{
 		UID:        uid,
 		SmokeTime:  smokeTime,
+		SmokeAt:    smokeAt,
 		Remark:     req.Remark,
 		CreateTime: &createTime,
 		UpdateTime: &updateTime,
@@ -148,6 +157,11 @@ type UpdateSmokeLogRequest struct {
 	// - true：前端传了 smoke_time（可以设置为具体日期，也可以清空为 NULL）
 	SmokeTimeProvided bool
 	SmokeTime         *time.Time
+	// SmokeAtProvided 用于区分：
+	// - false：前端没传 smoke_at（不修改）
+	// - true：前端传了 smoke_at（可以设置为具体时间，也可以清空为 NULL）
+	SmokeAtProvided bool
+	SmokeAt         *time.Time
 	Remark            *string
 	Level             *int64
 	Num               *int
@@ -163,6 +177,13 @@ func (s *SmokeLogService) Update(ctx context.Context, uid int, id int, req Updat
 	if req.SmokeTimeProvided {
 		updates["smoke_time"] = req.SmokeTime
 	}
+	if req.SmokeAtProvided {
+		updates["smoke_at"] = req.SmokeAt
+		if req.SmokeAt != nil {
+			day := time.Date(req.SmokeAt.Year(), req.SmokeAt.Month(), req.SmokeAt.Day(), 0, 0, 0, 0, req.SmokeAt.Location())
+			updates["smoke_time"] = &day
+		}
+	}
 	if req.Remark != nil {
 		updates["remark"] = *req.Remark
 	}