Split the object inspector, and sweep out the section banners

objectSection.ts had grown to 559 lines around three separable parts: the
queries, the vector rows and the parent row. Four object commands repeated the
same capture/restore preamble – applyCommands stays out, its five carry extra
undo state whose restore order matters.

58 dashed banner comments are gone. The nine labels in nodes/index.ts stay:
they are the only structure a flat 90-entry array has.

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

src/editor/texture/TextureCanvas.ts

@@ -143,8 +143,6 @@ export class TextureCanvas extends Widget {
     return { x: origin.x + local.x, y: origin.y + local.y };
   }
 
-  // --- model ------------------------------------------------------------------------------
-
   private asset(): TextureAsset | null {
     const asset = this.assetId ? findAsset(this.state.project, this.assetId) : undefined;
     return asset && asset.type === 'texture' ? asset : null;
@@ -159,8 +157,6 @@ export class TextureCanvas extends Widget {
     return this.asset()?.frames.find((f) => f.id === frameId);
   }
 
-  // --- pointer ----------------------------------------------------------------------------
-
   private onPointerDown(e: FederatedPointerEvent): void {
     const asset = this.asset();
     // Without a known picture size `normalizeFrameRect` has no bounds, and would keep a frame
@@ -312,8 +308,6 @@ export class TextureCanvas extends Widget {
     this.cursor = over ? 'move' : 'crosshair';
   }
 
-  // --- drawing ----------------------------------------------------------------------------
-
   override redraw(): void {
     this.bg.clear().rect(0, 0, this.w, this.h).fill(Theme.colors.viewport);
     this.clip.clear().rect(0, 0, this.w, this.h).fill(0xffffff);