Partial atmos refactor (#22521)

* Reduce atmos component queries

* Remove method events

* Cache airtight data

* Make MolesArchived nullable

* Fix airtight cache

* only get tile def once

* Immutable mixtures

* firelock queries

* misc

* misc cleanup

* Trim disconnected tiles

* Fix merge issues and bugs

* Why does the PR keep increasing in scope

* debug overlay

* Fix bugs

* Fix test, remove unused events

* Add setmapatmos command

* Fix overlays

* Add map check

* A

* Resolve conflicts with #26102

* Remove some obsolete methods

Content.Shared/Atmos/Atmospherics.cs

@@ -8,11 +8,6 @@ namespace Content.Shared.Atmos
     /// </summary>
     public static class Atmospherics
     {
-        static Atmospherics()
-        {
-            AdjustedNumberOfGases = MathHelper.NextMultipleOf(TotalNumberOfGases, 4);
-        }
-
         #region ATMOS
         /// <summary>
         ///     The universal gas constant, in kPa*L/(K*mol)
@@ -183,7 +178,7 @@ namespace Content.Shared.Atmos
         ///     This is the actual length of the gases arrays in mixtures.
         ///     Set to the closest multiple of 4 relative to <see cref="TotalNumberOfGases"/> for SIMD reasons.
         /// </summary>
-        public static readonly int AdjustedNumberOfGases;
+        public const int AdjustedNumberOfGases = ((TotalNumberOfGases + 3) / 4) * 4;
 
         /// <summary>
         ///     Amount of heat released per mole of burnt hydrogen or tritium (hydrogen isotope)

Content.Shared/Atmos/EntitySystems/SharedGasTileOverlaySystem.cs

@@ -66,7 +66,10 @@ namespace Content.Shared.Atmos.EntitySystems
         [Serializable, NetSerializable]
         public readonly struct GasOverlayData : IEquatable<GasOverlayData>
         {
+            [ViewVariables]
             public readonly byte FireState;
+
+            [ViewVariables]
             public readonly byte[] Opacity;
 
             // TODO change fire color based on temps