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/Network/Debug/NetworkBootstrap.cs

@@ -5,12 +5,9 @@ using UnityEngine.InputSystem;
 #endif
 
 /// <summary>
-/// Dev-only connection harness for local multiplayer testing across the junction-mirror clones: one
-/// instance clicks Host and the others click Client (loopback 127.0.0.1 via the configured
-/// UnityTransport). Everyone spawns as the neutral Player prefab into the Lobby; roles (Hunter/Hider)
-/// are rolled and applied by <see cref="MatchManager"/> when the match starts, not here. Hotkeys:
-/// H = Host, C = Client, J = Server, K = Shutdown. Purely a testing scaffold - replace with real
-/// lobby/menu UI later. Attach to the same GameObject as the NetworkManager.
+/// Dev-only connection harness for local multiplayer testing: Host/Client/Server over loopback via the
+/// configured UnityTransport (hotkeys H/C/J, K = Shutdown). Roles are rolled by <see cref="MatchManager"/>
+/// at match start, not here. Testing scaffold only - replace with real lobby/menu UI later.
 /// </summary>
 [RequireComponent(typeof(NetworkManager))]
 [DisallowMultipleComponent]
@@ -41,7 +38,7 @@ public class NetworkBootstrap : MonoBehaviour
         if (TypingGuard.IsTyping) return; // don't fire H/C/J/K while typing in a text field
 #if ENABLE_INPUT_SYSTEM
         var kb = Keyboard.current;
-        if (kb == null || _net == null) return;
+        if (kb == null || !_net) return;
         if (!_net.IsListening)
         {
             if (kb.hKey.wasPressedThisFrame) _net.StartHost();
@@ -57,7 +54,7 @@ public class NetworkBootstrap : MonoBehaviour
 
     private void OnGUI()
     {
-        if (!showGui || _net == null) return;
+        if (!showGui || !_net) return;
 
         GUILayout.BeginArea(new Rect(10, 10, 220, 160), GUI.skin.box);
         if (!_net.IsListening)