make player and client bound together

this cleansup and allows rejoining a running server

crates/server/src/player.rs

@@ -14,7 +14,7 @@ use shared::{
     hitpoints::{Hitpoints, Kill},
     npc::SpawnCharacter,
     player::{Player, PlayerBodyMesh},
-    protocol::{PlaySound, PlayerId, events::ClientHeadChanged},
+    protocol::{OwnedByClient, PlaySound, PlayerId, events::ClientHeadChanged},
     tb_entities::SpawnPoint,
 };
 
@@ -24,7 +24,7 @@ pub fn plugin(app: &mut App) {
 
 pub fn spawn(
     mut commands: Commands,
-    _owner: Entity,
+    owner: Entity,
     query: Query<&Transform, With<SpawnPoint>>,
     heads_db: Res<HeadsDatabase>,
 ) -> Option<Entity> {
@@ -58,6 +58,7 @@ pub fn spawn(
             UiActiveHeads::default(),
             Inputs::default(),
             Replicated,
+            OwnedByClient(owner),
         ))
         .with_children(|c| {
             c.spawn((

crates/shared/src/protocol/mod.rs

@@ -189,3 +189,11 @@ impl TbMapIdCounter {
 #[derive(Resource, Reflect, Default, Deref, DerefMut)]
 #[reflect(Resource)]
 pub struct TbMapEntityMapping(pub HashMap<u64, Entity>);
+
+#[derive(Component)]
+#[relationship(relationship_target = ClientOwns)]
+pub struct OwnedByClient(pub Entity);
+
+#[derive(Component)]
+#[relationship_target(relationship = OwnedByClient, linked_spawn)]
+pub struct ClientOwns(Entity);