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/handler/smoke_handler.go

@@ -14,19 +14,26 @@ import (
 )
 
 type SmokeHandler struct {
-	smokeLogService *smokeservice.SmokeLogService
+	smokeLogService      *smokeservice.SmokeLogService
+	smokeAIAdviceService *smokeservice.SmokeAIAdviceService
 }
 
-func NewSmokeHandler(smokeLogService *smokeservice.SmokeLogService) *SmokeHandler {
-	return &SmokeHandler{smokeLogService: smokeLogService}
+func NewSmokeHandler(smokeLogService *smokeservice.SmokeLogService, smokeAIAdviceService *smokeservice.SmokeAIAdviceService) *SmokeHandler {
+	return &SmokeHandler{
+		smokeLogService:      smokeLogService,
+		smokeAIAdviceService: smokeAIAdviceService,
+	}
 }
 
 // dateLayout 用于解析前端传入的日期字符串（例如：2025-12-31）
 const dateLayout = "2006-01-02"
+const dateTimeLayout = "2006-01-02 15:04:05"
 
 type createSmokeLogRequest struct {
 	// 只记录“日期”即可；如果不传，后端会按当天处理
 	SmokeTime string `json:"smoke_time"`
+	// 真实抽烟时间（精确到时分秒，可补录）
+	SmokeAt string `json:"smoke_at"`
 	Remark    string `json:"remark"`
 	Level     int64  `json:"level"`
 	Num       int    `json:"num"`
@@ -55,8 +62,19 @@ func (h *SmokeHandler) Create(c *gin.Context) {
 		smokeTime = &parsed
 	}
 
+	var smokeAt *time.Time
+	if req.SmokeAt != "" {
+		parsed, err := time.ParseInLocation(dateTimeLayout, req.SmokeAt, time.Local)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "smoke_at 格式错误，应为 YYYY-MM-DD HH:MM:SS"))
+			return
+		}
+		smokeAt = &parsed
+	}
+
 	record, err := h.smokeLogService.Create(c.Request.Context(), int(user.ID), smokeservice.CreateSmokeLogRequest{
 		SmokeTime: smokeTime,
+		SmokeAt:   smokeAt,
 		Remark:    req.Remark,
 		Level:     req.Level,
 		Num:       req.Num,
@@ -145,6 +163,7 @@ func (h *SmokeHandler) List(c *gin.Context) {
 
 type updateSmokeLogRequest struct {
 	SmokeTime *string `json:"smoke_time"`
+	SmokeAt   *string `json:"smoke_at"`
 	Remark    *string `json:"remark"`
 	Level     *int64  `json:"level"`
 	Num       *int    `json:"num"`
@@ -184,9 +203,26 @@ func (h *SmokeHandler) Update(c *gin.Context) {
 		}
 	}
 
+	smokeAtProvided := req.SmokeAt != nil
+	var smokeAt *time.Time
+	if req.SmokeAt != nil {
+		if *req.SmokeAt == "" {
+			smokeAt = nil
+		} else {
+			parsed, err := time.ParseInLocation(dateTimeLayout, *req.SmokeAt, time.Local)
+			if err != nil {
+				c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "smoke_at 格式错误，应为 YYYY-MM-DD HH:MM:SS"))
+				return
+			}
+			smokeAt = &parsed
+		}
+	}
+
 	record, err := h.smokeLogService.Update(c.Request.Context(), int(user.ID), id, smokeservice.UpdateSmokeLogRequest{
 		SmokeTimeProvided: smokeTimeProvided,
 		SmokeTime:         smokeTime,
+		SmokeAtProvided:   smokeAtProvided,
+		SmokeAt:           smokeAt,
 		Remark:            req.Remark,
 		Level:             req.Level,
 		Num:               req.Num,