uploadFileGrpc passed SaveSmallInline with a 256 KiB limit, so uploads under
that size were written to entry.Content instead of a volume. The filer's own
upload path never inlines unless saveToFilerLimit is set (default 0), and the
S3 server shares that path. Drop the inline options so admin uploads always
land in volumes.
The viewer embedded images and PDFs through the download URL, which sent
Content-Disposition: attachment, so the browser downloaded them instead of
rendering. Add an inline mode to the download endpoint, limited to images and
PDFs so a hostile upload (HTML, SVG) can't run as same-origin script, set
X-Content-Type-Options: nosniff, and resolve the MIME the same way the viewer
does. The viewer now requests the inline URL.
* fix(admin): switch file browser upload/download to filer gRPC + volume HTTP
The admin file browser proxied uploads and downloads through the filer's
HTTP listener, so the whole feature 404'd against filers started with
-disableHttp=true even though S3 still worked on its own port. Re-route
through the filer gRPC service: LookupDirectoryEntry + StreamContent for
reads (chunks flow straight from the volume servers), AssignVolume +
volume HTTP POST + CreateEntry for writes. Volume read tokens come from
jwt.signing.read.key when configured; the old jwt.filer_signing tokens
no longer apply since the filer HTTP surface is bypassed.
* admin file browser: propagate request context + track response writes
Pass r.Context() into uploadFileToFiler so a client disconnect cancels
the in-flight chunked upload instead of letting it run to completion
against the volume servers. For DownloadFile, replace the Content-Type
probe with a small response-writer wrapper that records whether headers
or bytes have actually been sent, so the error path can't silently
convert a pre-stream failure into a partial response if future code
moves the header-setting around.
Chris Lu