Trim needless comments and fix the picker width

Remove comments that only restate the code, keeping the section banners
and the notes that carry a reason, a measured fact or an external
contract.

ButtonOptions.width claimed to be a fixed width but only set minWidth,
so the Graph and Texture pickers grew with the name they showed. It is
now what it promises, with a separate minWidth for the buttons that have
two forms. Narrow buttons shrink their padding, otherwise a 24px icon
button had 8px left for its glyph and truncate dropped it entirely.

__gm.labelsDropped() guards that class: the overflow guard only saw text
that was too wide, never a label truncated to nothing.

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

src/core/commands/sceneObjectCommands.ts

@@ -18,14 +18,12 @@ import { requireAsset, requireObject, requirePropDef, requireScene } from './req
 import { SetBagValueCommand } from './SetBagValueCommand';
 
 /**
- * Places an asset into a scene, creating a scene object. Scenes cannot be placed. The
- * position is a world position; with a parent it is converted to the parent's local space.
+ * The position is a world position; with a parent it is converted to the parent's local space.
  * Placing a container also creates its content (see `instantiateContainer`).
  */
 export class PlaceAssetCommand implements Command {
   readonly label = 'Place asset';
   readonly objectId = newId();
-  /** Every object this command added: the placed one plus a container's content. */
   private createdIds: string[] = [];
 
   constructor(
@@ -54,7 +52,7 @@ export class PlaceAssetCommand implements Command {
   }
 }
 
-/** Removes objects (a multi-selection) together with everything parented below them, as one undo step. */
+/** Removes objects together with everything parented below them, as one undo step. */
 export class RemoveSceneObjectsCommand implements Command {
   readonly label: string;
   private removed: Removed<SceneObject>[] = [];
@@ -76,7 +74,6 @@ export class RemoveSceneObjectsCommand implements Command {
   }
 }
 
-/** Removes one object and everything parented to it. */
 export class RemoveSceneObjectCommand extends RemoveSceneObjectsCommand {
   constructor(sceneId: string, objectId: string) {
     super(sceneId, [objectId]);
@@ -84,9 +81,8 @@ export class RemoveSceneObjectCommand extends RemoveSceneObjectsCommand {
 }
 
 /**
- * Sets the full local position (x, y and draw order z) of a scene object. A caller that
- * previewed the move must restore the model before executing: the previous value is read
- * from the object at execution time.
+ * The previous position is read at execution time, so a caller that previewed the move must
+ * restore the model before executing.
  */
 export class MoveSceneObjectCommand implements Command {
   readonly label = 'Move object';
@@ -109,11 +105,7 @@ export class MoveSceneObjectCommand implements Command {
   }
 }
 
-/**
- * Sets the editor-only offset an object is drawn at in the scene view (see
- * `SceneObject.editorOffset`). Undoable like any other edit, but it changes nothing the game
- * can see – it only pulls overlapping objects apart while working on them.
- */
+/** Editor-only: undoable like any other edit, but it changes nothing the game can see. */
 export class SetEditorOffsetCommand implements Command {
   readonly label = 'Editor offset';
   private previous: Vec2 = { x: 0, y: 0 };
@@ -156,7 +148,6 @@ export class RenameSceneObjectCommand implements Command {
   }
 }
 
-/** The half of `SetBagValueCommand` both override edits share: the bag is the object's overrides. */
 abstract class OverrideCommand extends SetBagValueCommand<SceneObject> {
   protected constructor(
     private readonly sceneId: string,
@@ -176,7 +167,6 @@ abstract class OverrideCommand extends SetBagValueCommand<SceneObject> {
   }
 }
 
-/** Sets a per-object override of an asset property. */
 export class SetOverrideCommand extends OverrideCommand {
   constructor(
     sceneId: string,
@@ -192,22 +182,21 @@ export class SetOverrideCommand extends OverrideCommand {
   }
 }
 
-/** Removes an override so the object follows its asset again. */
 export class ClearOverrideCommand extends OverrideCommand {
   constructor(sceneId: string, objectId: string, key: string) {
     super(sceneId, objectId, key, `Reset ${key}`);
   }
 
-  // Unlike setting one, clearing an override does not check the key against the schema: a
-  // key the asset no longer declares is exactly what one wants to be able to clear.
+  // No schema check, unlike setting one: a key the asset no longer declares is exactly what one
+  // wants to be able to clear.
   protected override computeNext(): undefined {
     return undefined;
   }
 }
 
 /**
- * Re-parents an object ('' = top level). The object keeps its world position: its local
- * position is recomputed for the new parent. Cycles (an object below itself) are rejected.
+ * Re-parents an object ('' = top level). It keeps its world position: the local one is recomputed
+ * for the new parent.
  */
 export class SetParentCommand implements Command {
   readonly label = 'Set parent';