Adds an IFRAME_CSP environment variable that injects a Content-Security-Policy
<meta> tag into all srcdoc iframes rendering untrusted content:
- Artifacts (LLM-generated HTML previews)
- FullHeightIframe (tool/embed output)
- FilePreview (user-uploaded HTML files)
- CitationModal (RAG document HTML)
Shared utility in src/lib/utils/csp.ts handles injection with HTML-safe
attribute escaping. URL-based iframes (src=) are correctly excluded.
Env-var only — no PersistentConfig, no admin UI, no DB. Set once at deploy
time, requires restart. Empty string (default) means no CSP restriction.
* refac(routers): reject external URLs in profile/model image handlers
* refac(ui): centralize image URL validation in safeImageUrl helper
* refac(auths): make signout POST-only
* refac: gate external profile image redirect behind ENABLE_PROFILE_IMAGE_URL_FORWARDING
Restore the 302 redirect for external http(s) profile image URLs in
the user and model profile-image endpoints, but gate it behind a new
ENABLE_PROFILE_IMAGE_URL_FORWARDING env flag (default: True).
Existing deployments that rely on external profile image forwarding
continue to work unchanged. Operators who want to suppress the
redirect (to prevent client-side IP/UA/Referer leaks) can set the
flag to False.
Previously, clicking the file name link did not open the file content
because the condition checked `!isPDF && item.url`, which failed for
`type === 'file'` items that use an ID-based URL path.
Update the condition to trigger on `item.type === 'file' || item.url`,
and resolve the correct URL by extracting `fileId` from `item.id` or
`item.tempId` instead of using `item.url` directly as the file
identifier.
Timothy Jaeryang Baek