Refactor Assets/Scripts: trim restating comments, minor structure cleanups

Sweep over 48 files (Editor/ excluded): remove comments that restate the
code, condense class summaries, fix three stale doc statements
(HsvColorPicker alpha bar, PaintHud layoutPrefab, MasterVolume
FallbackDefault). Inline two single-use wrappers (IsPointerOverUi,
BuildModes), drop an unused using, replace a magic literal with the
existing ParallaxBase constant, and convert ~10 UnityEngine.Object null
checks to the implicit-bool convention. No serialized fields, signatures,
RPC/NetworkVariable names, defaults, or #if blocks touched.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/Components/SkyboxEnvironmentUpdater.cs

@@ -4,26 +4,22 @@ using UnityEngine.Rendering;
 using UnityEngine.Rendering.Universal;
 
 /// <summary>
-/// Builds the environment reflection from the current Skybox in memory (renders
-/// the sky into a cubemap and assigns it as the Custom reflection), so
-/// smooth/metallic materials reflect the sky WITHOUT a baked LightingData.asset.
-/// Runs in Edit and Play mode ([ExecuteAlways]); drop it on one object per scene
-/// (or a prefab that lives in every scene) and you never have to assign a foreign
-/// LightingData again — also works for runtime-loaded / procedural scenes.
+/// Builds the environment reflection from the current Skybox in memory (renders the sky into a cubemap
+/// assigned as the Custom reflection), so smooth/metallic materials reflect the sky WITHOUT a baked
+/// LightingData.asset. Runs in Edit and Play mode ([ExecuteAlways]); drop it on one object per scene —
+/// also works for runtime-loaded / procedural scenes.
 ///
-/// Why a rendered cubemap and not <see cref="DynamicGI.UpdateEnvironment"/>:
-/// in this project UpdateEnvironment does NOT produce a valid skybox reflection
-/// probe (a mirror stays black), so <see cref="RenderSettings.reflectionIntensity"/>
-/// had nothing to scale. Rendering the sky into a Custom reflection cubemap gives a
-/// real reflection that intensity can actually drive.
+/// Why a rendered cubemap and not <see cref="DynamicGI.UpdateEnvironment"/>: in this project
+/// UpdateEnvironment does NOT produce a valid skybox reflection probe (a mirror stays black), so
+/// <see cref="RenderSettings.reflectionIntensity"/> had nothing to scale. Rendering the sky into a
+/// Custom reflection cubemap gives a real reflection that intensity can actually drive.
 ///
-/// The skybox AMBIENT probe still comes from UpdateEnvironment — but it only convolves a
-/// non-zero probe once the sky has actually been rendered this session. Straight after a
-/// domain reload / scene load / play-start the sky hasn't rendered yet, so the probe is
-/// ZERO and the Environment intensity multiplier has nothing to scale ("doesn't take
-/// effect" until a manual re-enable). Fix: do one synchronous full-screen sky render to
-/// "warm" the sky right before UpdateEnvironment — deterministic, no waiting on renders.
-/// (RenderToCubemap does NOT warm the ambient path; a normal Camera.Render does.)
+/// The skybox AMBIENT probe still comes from UpdateEnvironment — but it only convolves a non-zero probe
+/// once the sky has actually been rendered this session. Straight after a domain reload / scene load /
+/// play-start the sky hasn't rendered yet, so the probe is ZERO and the Environment intensity multiplier
+/// has nothing to scale ("doesn't take effect" until a manual re-enable). Fix: one synchronous
+/// full-screen sky render "warms" the sky right before UpdateEnvironment — deterministic, no waiting on
+/// renders. (RenderToCubemap does NOT warm the ambient path; a normal Camera.Render does.)
 /// </summary>
 [ExecuteAlways]
 [DisallowMultipleComponent]