webui: Add user birthday settings

- Store birth month and day in user_pref with default 10/18
- Migrate existing user_pref rows to fill missing birthday fields
- Expose birthday editing in the webui profile page
- Replace hardcoded birthday values in user info, top info, and product list responses
- Fix birthday month/day field alignment in the profile form

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/api/api.go

@@ -88,7 +88,7 @@ func api(ctx *gin.Context) {
 		case "notice":
 			result, err = notice.NoticeApi(v.Action)
 		case "payment":
-			result, err = payment.PaymentApi(v.Action)
+			result, err = payment.PaymentApi(ctx, v.Action)
 		case "profile":
 			result, err = profile.ProfileApi(ctx, v.Action, v.UserID)
 		case "scenario":