Malformed static path encoding crashes the CommandBoard PWA server

[rissrice2105-agent]

Reproduction

1. Build and start the CommandBoard PWA server.
2. Request a malformed percent-encoded static path:

curl --path-as-is http://127.0.0.1:4173/%

Actual behavior

decodeURIComponent() throws a URIError, which escapes the request handler and terminates the Node process.

Expected behavior

Return a client error for the malformed path and keep the server available.

I have a small fix ready that returns 400 Invalid path encoding and preserves subsequent health requests.