feat(smoke): 添加个性化戒烟计划生成功能 (Issue #46)

- 新增 Model 层: SmokeQuitPlan, SmokeQuitPlanDay 结构体
- 新增 Service 层: GenerateQuitPlan, GetActivePlan, GetPlanDays, ResetPlan
- 新增 Handler 层: POST /generate, GET /, GET /days, POST /reset
- 集成 AI 生成 30 天个性化戒烟减量方案
- 支持重置计划功能

internal/routes/routes.go

@@ -26,6 +26,7 @@ func Register(
 	authHandler *authhandler.AuthHandler,
 	videoHandler *rmhandler.VideoHandler,
 	smokeHandler *smokehandler.SmokeHandler,
+	quitPlanHandler *smokehandler.QuitPlanHandler,
 	redeemCodeHandler *membershiphandler.RedeemCodeHandler,
 	uploadHandler *qiniuhandler.UploadHandler,
 	oaOAuthHandler *oahandler.OAuthHandler,
@@ -62,7 +63,7 @@ func Register(
 			registerCommonRoutes(protected, uploadHandler)
 			registerRemoveWatermarkRoutes(api, protected, videoHandler)
 			registerMembershipRoutes(protected, redeemCodeHandler)
-			registerSmokeRoutes(protected, smokeHandler)
+			registerSmokeRoutes(protected, smokeHandler, quitPlanHandler)
 		}
 
 		registerMarketingRoutes(api, protected, adminToken, marketingCategoryHandler, marketingTemplateHandler, marketingDownloadHandler)