[Feat] Allow explosions from enemy factions in claimed territory

[derrickmehaffy]

Scope

Add a server-configurable setting that allows enemy factions to use explosives (TNT, etc.) in each other's claimed territory. Currently, ProtectionChecker.shouldBlockExplosion() (line 892-896) blocks ALL explosions in claimed territory regardless of faction relation.

1. New global config option to enable/disable enemy explosions in claims
2. When enabled, explosions from enemy faction members should damage blocks in enemy claims
3. Own faction, ally, and neutral explosions should remain blocked in claims
4. Should respect existing zone-level EXPLOSION_DAMAGE flag overrides

Implementation Details

Current code (ProtectionChecker.java:892-896):

UUID claimOwner = claimManager.getClaimOwner(worldName, chunkX, chunkZ);
if (claimOwner != null) {
 return true; // Block explosions in ALL claims
}

Needed changes:

1. Add config option in CoreConfig.java: allowEnemyExplosionsInClaims = false (default off)
2. Modify shouldBlockExplosion() to accept explosion source (attacker UUID/faction)
3. Check RelationManager.areEnemies(sourceFaction, claimOwnerFaction) — if enemies and config enabled, allow
4. Mixin enhancement needed: Current mixin hook (HyperProtectIntegration.evaluateExplosion() line 269) only passes coordinates, not attacker identity. Would need to pass the explosion source entity/player UUID through the mixin callback.

Suggested config:

{
 "territory": {
 "allowEnemyExplosionsInClaims": false
 }
}

Suggested permission: hyperfactions.territory.explosions.enemy (could be per-faction toggle via faction settings)

Related code:

• RelationManager.java — areEnemies() (line 202), getEffectiveRelation() (line 136)
• HyperProtectIntegration.java (line 269 — mixin hook point)
• ZoneFlags.java — EXPLOSION_DAMAGE flag (line 205)

Risks and Alternatives

1. Risk: Mixin modification required — current explosion hook doesn't carry attacker identity. This is the primary technical challenge.
2. Risk: Potential for griefing if misconfigured — clear documentation and default-off is important
3. Alternative: Per-faction toggle (faction setting) instead of global server config — gives faction leaders control
4. Alternative: Zone-level flag override to selectively enable in specific areas

References and Media

Similar to MCFactions/FactionsUUID "enemy TNT" feature where enemy factions can use TNT in each other's territory.