* [web] reject upload requests without a file path
* [web] update copy on error message and link to contact form
Co-authored-by: Kamal Arkinstall <kamal.arkinstall@overleaf.com>
* [web] update copy: move dot to the end
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Co-authored-by: Kamal Arkinstall <kamal.arkinstall@overleaf.com>
GitOrigin-RevId: ba1ee81a91b046540caeb2f3f3da0e305611b35f