Function scroll

src/utils/computerUse/executor.ts:600–609

* Move first, then scroll each axis. Vertical-first — it's the common * axis; a horizontal failure shouldn't lose the vertical.

(x: number, y: number, dx: number, dy: number)

     * axis; a horizontal failure shouldn't lose the vertical.
     */
    async scroll(x: number, y: number, dx: number, dy: number): Promise<void> {
      const input = requireComputerUseInput()
      await moveAndSettle(input, x, y)
      if (dy !== 0) {
        await input.mouseScroll(dy, 'vertical')
      }
      if (dx !== 0) {
        await input.mouseScroll(dx, 'horizontal')
      }
    },

    // ── App management ───────────────────────────────────────────────────