test(changeTracker): add regression test for multilineOrOptions forwarding in wrapped prompt

## Follow-up: Regression Test for `multilineOrOptions` Argument Forwarding

### Background

In PR #8985, a bugfix was applied to `src/scripts/changeTracker.ts` where the monkey-patched `LGraphCanvas.prototype.prompt` was silently dropping the fifth argument (`multilineOrOptions`). The fix correctly forwards this argument to the original `prompt` call.

### Problem

There is currently no regression test covering this fix. A future refactor could silently re-drop the `multilineOrOptions` argument, reintroducing the bug without any test failure.

### Task

Add a unit test in the `ChangeTracker` test suite (or a dedicated test file) that:

1. Wraps `LGraphCanvas.prototype.prompt` via `ChangeTracker.init()` (or the relevant setup path).
2. Calls the wrapped `prompt` with a `PromptOptions` object (e.g. `{ inputType: 'number', min: 0, max: 10 }`) as the fifth argument.
3. Asserts that the underlying original `prompt` receives the `multilineOrOptions` argument correctly (i.e. it is not `undefined` and matches the passed value).

### References

- PR: #8985
- Review comment: https://github.com/Comfy-Org/ComfyUI_frontend/pull/8985#discussion_r2886699341
- File: `src/scripts/changeTracker.ts`

Requested by @dante01yoon.

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