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/RadarTarget.cs

@@ -1,17 +1,16 @@
 using UnityEngine;
 
 /// <summary>
-/// A single radar blip spawned by <see cref="Radar"/>. Each frame it orients itself so its forward (+Z, where
-/// the "Point" marker sits) faces the direction from the reference camera to a world-space target, visualising
-/// the bearing camera -> target. Tracks continuously (the camera turns / the target moves) and self-destructs
-/// once its lifetime elapses - or earlier if its target is destroyed. The point's base colour and size encode
-/// the two things the flat radar disc can't show via position alone: <see cref="forwardGradient"/> tints it by
-/// how far the target sits ahead of / behind the camera, and its scale shrinks with camera -> target distance.
+/// A single radar blip spawned by <see cref="Radar"/>. Each frame it orients its forward (+Z, where the
+/// "Point" marker sits) along the bearing reference camera -> world target, and self-destructs once its
+/// lifetime elapses - or earlier if the target is destroyed. The point encodes the two things the flat
+/// disc can't show via position alone: <see cref="forwardGradient"/> tints it by how far the target sits
+/// ahead of / behind the camera, and its scale shrinks with camera -> target distance.
 ///
-/// On top of the radar-wide fade, each blip fades in when it spawns and fades out at the end of its life (or when
-/// its world target vanishes) via its own <see cref="_fade"/> factor, so blips appear/disappear smoothly instead
-/// of popping. Fade-in and fade-out speeds are independent; the factor persists across <see cref="Refresh"/> so a
-/// refreshed blip is pulled back to full opacity rather than flickering to zero first.
+/// On top of the radar-wide fade, each blip ramps its own <see cref="_fade"/> in on spawn and out at end
+/// of life (or when its world target vanishes), so blips never pop. The factor persists across
+/// <see cref="Refresh"/> so a refreshed blip is pulled back to full opacity rather than flickering to
+/// zero first.
 /// </summary>
 [DisallowMultipleComponent]
 public sealed class RadarTarget : MonoBehaviour