Share the one HTTP envelope and the one byte formatter

Both stores carried their own ~28-line request<T>, and formatBytes existed
twice – the second copy had lost the "B" branch, so a small sprite would have
read as 0 KB had its caller ever passed one under a kilobyte.

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

src/ui/widgets/ListView.ts

@@ -202,8 +202,6 @@ export class ListView extends Widget {
     this.drawDropMarker();
   }
 
-  // --- pointer input -------------------------------------------------------------------------
-
   private onRowPress(row: ListRow, e: FederatedPointerEvent): void {
     const { item } = row;
     const modifiers: PickModifiers = { ctrl: e.ctrlKey || e.metaKey, shift: e.shiftKey };

src/ui/widgets/TextField.ts

@@ -115,8 +115,6 @@ export class TextField extends Widget implements TextEditTarget {
     this.dragSelecting = true;
   }
 
-  // --- focus ---------------------------------------------------------------------------------
-
   override onFocus(): void {
     super.onFocus();
     this.startEditing();
@@ -173,8 +171,6 @@ export class TextField extends Widget implements TextEditTarget {
     this.invalidate();
   }
 
-  // --- TextEditTarget ------------------------------------------------------------------------
-
   /** Adopts the input's value and selection verbatim; fires `onInput` only when the text changed. */
   onBridgeInput(value: string, selectionStart: number, selectionEnd: number): void {
     const changed = value !== this.valueText;
@@ -212,8 +208,6 @@ export class TextField extends Widget implements TextEditTarget {
     if (ui().focus.focused === this) ui().focus.blur();
   }
 
-  // --- geometry ------------------------------------------------------------------------------
-
   private textWidth(text: string): number {
     return CanvasTextMetrics.measureText(text, this.textNode.style).width;
   }