* fix(web): serve panel SPA routes from NoRoute
Return the React shell for authenticated panel document routes that are not explicitly registered in Gin, such as /panel/hosts. Keep API, CSRF, static-file, method, and Accept exclusions so API misses remain 404 and auth semantics stay unchanged.
* fix(web): remove unreachable panel path guard
The panel path is always built by appending /panel, so it can never be empty.
Remove the redundant fallback branch without changing SPA routing behavior.
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
* fix(web): allowlist static-asset extensions in SPA fallback
The blanket path.Ext check rejected any panel route whose last segment contained a dot, which would reintroduce the refresh 404 for a future client route carrying a dotted parameter (version, domain, or email-like value). Restrict the static-asset exclusion to a known, case-insensitive extension allowlist and add predicate regression cases.
w3struk