Users need a visible upload path from the explorer itself, not only drag and
drop behavior with no progress feedback. Routing picker and drop uploads
through one XHR-backed hook keeps progress, validation, refresh, and success
counts consistent for every upload source.
The 200MB limit is mirrored in the client, multer, and nginx template so large
uploads fail predictably instead of being blocked by whichever layer sees the
request first. The server also returns explicit requested and uploaded counts
so partial or multi-file batches can render accurate status text.
Users deploying behind a reverse proxy need a config they can adapt.
The template documents each proxy block and centralizes upstream/subpath values.
It also notes that Nginx location matchers still require literal subpath edits.
