fix(webserver): fix /files prefetching with _rsc

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 55.75%. Comparing base (306c4f6) to head (a2b93e5). Report is 10 commits behind head on main.

Files	Patch %	Lines
ee/tabby-webserver/src/routes/ui.rs	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2474 +/- ## ========================================== - Coverage 55.87% 55.75% -0.12% ========================================== Files 169 169 Lines 15051 15087 +36 ========================================== + Hits 8409 8412 +3 - Misses 6642 6675 +33 ```

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