Set valid actionId to JOIN_GAME events

actions.js

@@ -52,7 +52,7 @@ export function joinGame(gameId: GameId, user: User): JoinGameAction {
   return {
     type: 'JOIN_GAME',
     payload: {
-      actionId: 0,
+      actionId: getActionId(0),
       prevActionId: 0,
       userId: user.id,
       gameId,

multiplayer.md

@@ -75,4 +75,4 @@ The action id is a local timestamp, separate for each player. Being a timestamp,
 
 Caveat: To ensure action order consistency, the action id needs to be unique. So each player will ensure a new action's id is higher than the id of the previous action, in the highly unlikely event that two actions are dispatched in the same millisecond.
 
-> **Quirk:** Player state is initiated with `lastActionId` equal to `0`, and `JOIN_GAME` actions also have `actionId` set to `0`.
+> Player state is initiated with `lastActionId` equal to `0`, and `JOIN_GAME` actions also have `prevActionId` set to `0`.

types/actions.js

@@ -21,7 +21,7 @@ export type LoadGameAction = {
 export type JoinGameAction = {
   type: 'JOIN_GAME',
   payload: {
-    actionId: 0,
+    actionId: ActionId,
     prevActionId: 0,
     gameId: GameId,
     userId: UserId,