Hygiene B6b: convert leaky-world tests + HudSystem cosmetics

- 10 EditMode files: every bare trailing world.Dispose() now inside using(world){} (single-world) or a [TearDown]+List<World> (the multi-world reject-matrix tests in BoonApplyTests/RouteSelectSystemTests) — an assertion failure can no longer leak the World and mask the true first failure. No test logic changed.
- HudSystem: collapse the blank-line run before the class close; trim the extracted route-map clause from the READY-panel comment.

466/466 EditMode tests pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Project/Tests/EditMode/RunDirectorTraversalTests.cs

@@ -93,6 +93,8 @@ static int RoomEntities(EntityManager em)
         public void Cleared_LootWindowThenPortalAdvances_WithSlotFlipAndEpochBump()
         {
             var (world, group, dir, player) = MakeMidRunWorld(0, out var map);
+            using (world)
+            {
             var em = world.EntityManager;
             var node0 = em.CreateEntity(typeof(RoomTag));
             em.SetComponentData(node0, new RoomTag { Room = 0 });
@@ -132,7 +134,7 @@ static int RoomEntities(EntityManager em)
             Assert.AreEqual(0, em.GetComponentData<RouteCommand>(dir).HasPick, "latch consumed");
             Assert.AreEqual(0, (int)info.RouteOptionCount, "gate closed on advance");
             Assert.GreaterOrEqual(em.GetComponentData<LocalTransform>(player).Position.x, 1499f, "party teleported (+1500)");
-            world.Dispose();
+            }
         }
 
         [Test]
@@ -140,6 +142,8 @@ static int RoomEntities(EntityManager em)
         {
             RunMap map0;
             var (world, group, dir, player) = MakeMidRunWorld(0, out map0);
+            using (world)
+            {
             var em = world.EntityManager;
             int bossLayer = map0.LayerCount - 1;
             var info0 = em.GetComponentData<RunInfo>(dir);
@@ -174,13 +178,15 @@ static int RoomEntities(EntityManager em)
             group.Update();
             Assert.AreEqual(1, em.GetComponentData<GoalProgress>(dir).Charge, "no double credit (F7)");
             Assert.AreEqual(1, em.GetComponentData<MetaCounters>(dir).RunsCompleted);
-            world.Dispose();
+            }
         }
 
         [Test]
         public void Abort_BanksDepthOnly_NoWinCredit()
         {
             var (world, group, dir, player) = MakeMidRunWorld(2, out var map);
+            using (world)
+            {
             var em = world.EntityManager;
             // All expedition players gone mid-room-2 (rooms 0-1 cleared) -> abort.
             em.SetComponentData(player, new RegionTag { Region = RegionId.Base });
@@ -196,13 +202,15 @@ static int RoomEntities(EntityManager em)
             var threat = em.GetComponentData<ThreatState>(dir);
             Assert.AreEqual(0, threat.PendingReturns, "no retaliation provoked by an abort");
             Assert.AreEqual(0, em.GetComponentData<SaveRequest>(dir).Pending, "no save spam on abort");
-            world.Dispose();
+            }
         }
 
         [Test]
         public void RouteGate_PickBeatsSameTickGrace()
         {
             var (world, group, dir, player) = MakeMidRunWorld(0, out var map);
+            using (world)
+            {
             var em = world.EntityManager;
             MarkCleared(em, dir);
             group.Update();
@@ -221,13 +229,15 @@ static int RoomEntities(EntityManager em)
             var info = em.GetComponentData<RunInfo>(dir);
             Assert.AreEqual(RunLifecycle.InRoom, info.Lifecycle);
             Assert.AreEqual(pickedCol, info.CurrentCol, "the accepted pick beats the same-tick grace expiry");
-            world.Dispose();
+            }
         }
 
         [Test]
         public void RouteGate_GraceAutoPicksLowestOption()
         {
             var (world, group, dir, player) = MakeMidRunWorld(0, out var map);
+            using (world)
+            {
             var em = world.EntityManager;
             MarkCleared(em, dir);
             group.Update();
@@ -242,13 +252,15 @@ static int RoomEntities(EntityManager em)
             var info = em.GetComponentData<RunInfo>(dir);
             Assert.AreEqual(RunLifecycle.InRoom, info.Lifecycle, "the AFK backstop advances the run");
             Assert.AreEqual(lowestCol, info.CurrentCol, "deterministic lowest-index reachable auto-pick");
-            world.Dispose();
+            }
         }
 
         [Test]
         public void RouteGate_Abort_ClosesGateOnTheEdge()
         {
             var (world, group, dir, player) = MakeMidRunWorld(0, out var map);
+            using (world)
+            {
             var em = world.EntityManager;
             MarkCleared(em, dir);
             group.Update();
@@ -262,7 +274,7 @@ static int RoomEntities(EntityManager em)
             var info = em.GetComponentData<RunInfo>(dir);
             Assert.AreEqual(RunLifecycle.Returning, info.Lifecycle);
             Assert.AreEqual(0, (int)info.RouteOptionCount, "gate closed ON the abort edge (review F3)");
-            world.Dispose();
+            }
         }
     }
 }