Auto-rejoin social lobby after private match completion

[Copilot]

When players exit a private Arena/Combat match via the "Social Lobby" button, they should automatically rejoin a new social lobby together if the match originated from one.

Implementation

Tracking origin

• Added OriginSocialID field to MatchLabel and MatchSettings
• lobbyCreate detects when private matches spawn from social lobbies and stores the origin ID

Auto-rejoin trigger

• MatchLeave: Creates new social lobby when match empties
• MatchTerminate: Creates new social lobby on match termination
• Only applies to private Arena/Combat matches (excludes social lobbies)

Rejoin behavior

• createSocialLobbyRejoin creates new social lobby with:
  • All match participants as 1-minute reservations
  • Same group ID to preserve party communication
  • Public social mode for seamless transition

// Match creation from social lobby now tracks origin
if (params.Mode == evr.ModeArenaPrivate || params.Mode == evr.ModeCombatPrivate) && 
   !params.CurrentMatchID.IsNil() {
    if currentLabel.Mode == evr.ModeSocialPublic {
        settings.OriginSocialID = &params.CurrentMatchID.UUID
    }
}

Files Changed

• evr_match_label.go: Added OriginSocialID field
• evr_match.go: Added rejoin logic in MatchLeave/MatchTerminate, implemented createSocialLobbyRejoin
• evr_lobby_create.go: Origin tracking during match creation
• evr_match_social_rejoin_test.go: Unit tests for new functionality

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Auto-group social lobby rejoin after private match</issue_title>
<issue_description>Feature: When players exit a private match (triggered via the "Social Lobby" button on
the terminal), check if the match originated from a social lobby. If so, after the match
completes, automatically send all participants to the same new social lobby and create
one-minute reservations for each player in that lobby. If possible, ensure seamless
group transition so prior group communications persist within the new social lobby session.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Auto-group social lobby rejoin after private match #234

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