The workspace pages and every file under /prompt_manager/js and
/prompt_manager/lib went out with no Cache-Control and no validator.
ComfyUI's own cache middleware only fills a missing Cache-Control for
paths ending in .js or .css, so the workspace's .mjs modules got no
header at all, and after an update the browser could keep running old
modules until a hard refresh.
Every page and static file now carries Cache-Control: no-cache and a
weak ETag over its bytes, and a request that already holds that version
gets a 304 without a body. A normal reload picks up new code and stays
cheap when nothing changed.
Closes#478
Vito
20dbc2df21