CVE-2026-47676: Hono: app.mount() strips mount prefix using undecoded path, causing incorrect routing for percent-encoded paths

app.mount() strips the mount prefix from the incoming request path using the raw URL pathname, while route matching is performed against the percent-decoded path. This inconsistency causes the prefix to be stripped at the wrong position when the path contains percent-encoded multi-byte characters, resulting in the mounted sub-application receiving an incorrect path.