Docs: reduce over-documentation across gameplay scripts

Trim restated narration, dead commented-out code, and oversized class
headers; keep all why-comments (authority, timing, edge cases), tooltips,
and serialization caveats.

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

Assets/Scripts/MeshPainter.Net.cs

@@ -4,15 +4,11 @@ using Unity.Netcode;
 using UnityEngine;
 
 /// <summary>
-/// One committed brush stamp in a form that can be replicated across the network. Painting is
-/// synced as commands (these stamps), not as pixels: the owner already resolves every stamp into
-/// local object space (hit point, radius, tangent frame) inside <see cref="MeshPainter.PaintAtScreen"/>,
-/// so a remote peer just replays the SAME stamp through its own backend onto the identical mesh/UVs
-/// and gets a near-identical result - for a fraction of the bandwidth of streaming the 12 MB of maps.
-///
-/// Self-contained on purpose: each stamp carries its full brush state, so the stream is stateless and
-/// robust to ordering/loss (sent reliably). Channel data (metallic/smoothness/occlusion + opacities)
-/// quantizes to bytes with no real loss because the paint maps are 8-bit anyway.
+/// One committed brush stamp in replicable form. Painting is synced as commands, not pixels: the owner
+/// already resolves every stamp into local object space (hit point, radius, tangent frame), so a remote
+/// peer replays the SAME stamp through its own backend onto the identical mesh/UVs.
+/// Self-contained on purpose: each stamp carries its full brush state, so the stream is stateless.
+/// Channel data quantizes to bytes with no real loss (the paint maps are 8-bit anyway).
 /// </summary>
 public struct PaintStampNet : INetworkSerializable
 {
@@ -239,11 +235,10 @@ public partial class MeshPainter
     }
 
     /// <summary>
-    /// Owner-side: re-seeds the painter from an in-memory snapshot blob and resets history to it as a fresh
-    /// local baseline - exactly like <see cref="LoadPaintByName"/> does for a file, just from bytes. Used to
-    /// carry a painting onto a freshly spawned avatar across a scene-switch respawn; the caller then
-    /// BroadcastLoadedPaint()s it to peers via the same path a manual load uses. Returns false if the painter
-    /// is not ready or the blob is missing / incompatible (the current painting is left untouched).
+    /// Owner-side: re-seeds the painter from an in-memory snapshot blob and resets history to it as a
+    /// fresh local baseline (like <see cref="LoadPaintByName"/>, just from bytes) - used to carry a
+    /// painting across a scene-switch respawn, then rebroadcast via BroadcastLoadedPaint. Returns false
+    /// if the painter is not ready or the blob is incompatible (the current painting stays untouched).
     /// </summary>
     public bool LoadPaintFromSnapshot(byte[] compressed)
     {