Revert "Auto-generate nicknames for invitees joining via link"

This reverts commit 32e4e61635.

main.go

@@ -106,35 +106,16 @@ func main() {
 			c.Sync()
 		})
 
-		// Auto-join logic
-		if gameExists && gi.GetPlayerColor(playerID) == 0 {
-			g := gi.GetGame()
-			// Invitee: game is waiting for second player - auto-generate nickname and join
-			if g.Status == game.StatusWaitingForPlayer {
-				name := sessionNickname
-				if name == "" {
-					name = game.GenerateNickname()
-					c.Session().Set("nickname", name)
-				}
-				player := &game.Player{
-					ID:       playerID,
-					Nickname: name,
-				}
-				gi.Join(&game.PlayerSession{
-					Player: player,
-					Sync:   c,
-				})
-			} else if sessionNickname != "" {
-				// Reconnecting player with existing nickname
-				player := &game.Player{
-					ID:       playerID,
-					Nickname: sessionNickname,
-				}
-				gi.Join(&game.PlayerSession{
-					Player: player,
-					Sync:   c,
-				})
+		// If nickname exists in session and game exists, join immediately
+		if gameExists && sessionNickname != "" && gi.GetPlayerColor(playerID) == 0 {
+			player := &game.Player{
+				ID:       playerID,
+				Nickname: sessionNickname,
 			}
+			gi.Join(&game.PlayerSession{
+				Player: player,
+				Sync:   c,
+			})
 		}
 
 		c.View(func() h.H {