Enhance smoking tracking API and documentation

- Updated the main.go file to set the local time zone to Asia/Shanghai.
- Changed API endpoints from `PUT` to `POST` for user profile and logs management in multiple documentation files to reflect the correct usage.
- Added new fields in the API response for home summary, including `last_smoke_at`, `today_count`, `resisted_count`, and `reduced_from_yesterday`.
- Enhanced documentation across various files to accurately describe the updated API endpoints and their expected behaviors.

cmd/api/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"log"
+	"time"
 
 	"github.com/gin-gonic/gin"
 
@@ -31,6 +32,12 @@ import (
 )
 
 func main() {
+	if loc, err := time.LoadLocation("Asia/Shanghai"); err == nil {
+		time.Local = loc
+	} else {
+		time.Local = time.FixedZone("CST", 8*3600)
+	}
+
 	// 1) 加载配置（通常来自环境变量 / .env）
 	config.LoadConfig()