## Summary
The dashboard's Agent view rendered `source-url` and `file` message
parts by putting their `url` straight into an `href`/`src`. Those URLs
come from streamed agent and tool data, so a tool that emitted something
like `javascript:alert(1)` produced a clickable XSS payload in the
dashboard.
## Fix
A `toSafeUrl` helper now gates every URL before it reaches an
`href`/`src`: it allows only `http:`/`https:`/`blob:` (and
`data:image/...` for inline images) and returns `null` for anything
else. Unsafe values render as plain text instead of a link or image, so
a hostile or malformed URL degrades gracefully rather than becoming
clickable. Safe URLs render exactly as before. Covered by a unit test
over the allow/deny list.
Eric Allam
b28c6d0b90