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/graphCommands.ts

@@ -16,7 +16,6 @@ import { type Command, CommandError } from './Command';
 import { requireBehavior, requireNode, requireNodeDef } from './require';
 import { SetBagValueCommand } from './SetBagValueCommand';
 
-/** Adds a node of the given type at graph coordinates. Params start at their defaults. */
 export class AddNodeCommand implements Command {
   readonly label: string;
   readonly node: GraphNode;
@@ -28,8 +27,8 @@ export class AddNodeCommand implements Command {
     y: number,
     params: PropertyBag = {},
   ) {
-    // An unknown type is rejected in `execute`, not here: constructors run outside the
-    // editor's error handling, so throwing here would crash instead of showing a notice.
+    // An unknown type is rejected in `execute`: constructors run outside the editor's error
+    // handling, so throwing here would crash instead of showing a notice.
     const def = nodeDef(type);
     this.node = {
       id: newId(),
@@ -80,8 +79,8 @@ export class RemoveNodeCommand implements Command {
 }
 
 /**
- * Sets a node's graph position. A caller that previewed the drag must restore the node
- * before executing: the previous position is read at execution time.
+ * The previous position is read at execution time, so a caller that previewed the drag must restore
+ * the node before executing.
  */
 export class MoveNodeCommand implements Command {
   readonly label = 'Move node';
@@ -134,10 +133,7 @@ export class SetNodeParamCommand extends SetBagValueCommand<GraphNode> {
   }
 }
 
-/**
- * Connects an output to an input. Validates port existence and type compatibility; a data
- * input holds at most one edge, so an existing one is replaced (and restored on undo).
- */
+/** A data input holds at most one edge, so an existing one is replaced (and restored on undo). */
 export class ConnectCommand implements Command {
   readonly label = 'Connect';
   readonly edge: GraphEdge;
@@ -175,7 +171,6 @@ export class ConnectCommand implements Command {
   }
 }
 
-/** Removes one edge. */
 export class DisconnectCommand implements Command {
   readonly label = 'Disconnect';
   private removed: Removed<GraphEdge>[] = [];