Crossref syntax not well supported with `non-space-sperated` situation

Crossref syntax such as See @fig-demofiglabel is not well supported with no-space situation for docx output format.

WARNING: Unable to resolve crossref @fig-demofiglabel所示

For example:

如@fig-demofiglabel所示

I tried the syntax below, with no success

如@{fig-demofiglabel}所示

MWE

---
title: MWE
format: docx
---


See @fig-demofiglabel

如@{fig-demofiglabel}所示

If I add a space before`@`, it works.

如 @{fig-demofiglabel}所示

```{r}
#| label: fig-demofiglabel
#| fig-cap: "Demo figure"
plot(1)
```

Reproduce the minimal example with Quarto's docx output and the adjacent Chinese characters around @fig-demofiglabel. Compare the working spaced reference with the no-space cases, then trace the cross-reference parsing and resolution path. Done means the cross-reference resolves without requiring a preceding space, while existing spaced syntax continues to work.