## Summary
Extract `assetPath` from a `ComfyPage` method to a standalone pure
function, removing unnecessary coupling to the page object.
## Changes
- **What**: Moved `assetPath` to
`browser_tests/fixtures/utils/paths.ts`. `DragDropHelper` and
`WorkflowHelper` import it directly instead of receiving it via
`ComfyPage`. `ComfyPage.assetPath` kept as thin delegate for backward
compat.
## Review Focus
Structural-only refactor — no behavioral changes. The function was
already pure (no `this`/`page` usage).
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10651-refactor-extract-assetPath-as-standalone-pure-function-3316d73d365081c0b0e0ce6dde57ef8e)
by [Unito](https://www.unito.io)