Fix client friend status mapping

- Add explicit client friend status constants and resolver
- Return dynamic friend status from profileInfo and friend/search
- Accept invite_code when loading profileInfo targets
- Align live support friend status values with client expectations

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

internal/handler/live/partylist.go

@@ -39,7 +39,7 @@ func partyList(ctx *gin.Context) {
 		selfParty := liveschema.PartyList{
 			UserInfo:       ss.GetUserInfo(),
 			SettingAwardID: pref.AwardID,
-			FriendStatus:   0,
+			FriendStatus:   usermodel.ClientFriendStatusNone,
 		}
 		selfParty.AvailableSocialPoint = 10
 		selfParty.CenterUnitInfo, err = mustFindCenterUnitInfo(ss, ss.UserID, pref.UnitOwningUserID)