fix(mobs): a guest's tool breaking reaches the other clients

`LivingEntity.onEquippedItemBroken` broadcasts the equipment-break event for
the hand, so every client plays the break and its crumbs. A guest's tool
breaks on the host (`Game::damage_held` acting for the guest), and until now
nothing told the other clients: it was heard only by the window that
happened to be simulating. The break now goes through
`Game::lan_entity_event` with `equipment_break_event(MainHand)` (47).

Co-Authored-By: DeepSeek Harness (deepseek-v4.1-flash) <[email protected]>

crates/horizon-client/src/game.rs

@@ -11827,6 +11827,23 @@ impl Game<'_> {
                 }
                 // LivingEntity.breakItem: the broken item's five crumbs.
                 self.eat_particles(&gone, 5);
+                // LivingEntity.onEquippedItemBroken: the level broadcasts the
+                // break event for the hand, so a guest's tool breaking on the
+                // host reaches every client (`ServerPlayer`'s own break is
+                // broadcast too, this window's included).
+                let guest = self.lan_acting.and_then(|conn| {
+                    self.lan
+                        .as_ref()
+                        .and_then(|host| host.hub.guests.iter().find(|g| g.conn == conn))
+                        .map(|g| g.entity_id)
+                });
+                if let Some(entity) = guest {
+                    let event = horizon_client::mobs::item_break::equipment_break_event(
+                        horizon_world::player_inventory::EquipmentSlot::MainHand,
+                    );
+                    let at = self.eye_position().unwrap_or([0.0; 3]);
+                    self.lan_entity_event(entity, event, at);
+                }
             }
         }
     }

tools/port_map/game-006.tsv

@@ -95,7 +95,7 @@ LivingEntity.getLocalBoundsForPose	missing		minor: no pose boxes; a dismounting
 LivingEntity.wouldNotSuffocateAtTargetPose	port	crates/horizon-client/src/pose.rs::MotionWorld::can_fit_pose	gap: minor: the player's poses only; a camel changing pose is not checked
 LivingEntity.canUsePortal	port	crates/horizon-client/src/game/nether_portal.rs::Game::mob_can_use_portal	gap: minor: a sleeping mob is not excluded
 LivingEntity.setPosToBed	port	crates/horizon-client/src/mobs/villager.rs::start_sleeping	x and z at the bed's centre, y 0.6875 above its base (sleep height plus 0.125)
-LivingEntity.entityEventForEquipmentBreak	inline	crates/horizon-client/src/game/creatures.rs::Game::hurt_mob_armor	a mob's worn armour that breaks from a hit broadcasts 49 to 52 (armour) and 65 (body); the player's own hands (47, 48), the saddle (68) and a guest's tool breaking on the host are not broadcast yet
+LivingEntity.entityEventForEquipmentBreak	inline	crates/horizon-client/src/game/creatures.rs::Game::hurt_mob_armor	a mob's worn armour breaking from a hit broadcasts 49 to 52 and 65, and a guest's held tool breaking on the host broadcasts 47; the saddle (68), the off hand (48) and a host's own tool an open world's guests should hear are not broadcast yet
 LivingEntity.onEquippedItemBroken	inline	crates/horizon-client/src/game.rs::Game::damage_held	gap: minor: the stack is cleared and modifiers rebuilt, but no break event is broadcast
 LivingEntity.stopLocationBasedEffects	inline	crates/horizon-client/src/game.rs::Game::apply_equipment	all applied modifiers are dropped and re-added from what is worn
 LivingEntity.getEquipmentSlotForItem	inline	crates/horizon-client/src/game/mob_gear.rs::Game::equip_from_table	resolveSlot: the item's equip_slot, else the main hand