Address three fan-settings issues:
1. Profile view: show a fan icon next to a profile's name when it has a
saved fan curve, so it's clear which profiles carry custom fans.
2. Fan curve persistence: the active fan curve was in-memory only and lost
on every server restart. It is now persisted per-GPU in
/etc/nvcurve/config.json (fan_curves) and re-applied at server startup,
so an applied curve survives restarts. All fan-curve state changes route
through _activate_fan_curve/_deactivate_fan_curve helpers that keep the
persisted state in sync (apply, reset, and profile apply).
3. Point removal: the fan-curve remove button was nearly invisible. The
chart remove control is now always faintly visible with an X glyph, the
table remove button is larger with a tooltip, and a hint line explains
how to add/remove points.
Also includes a formatting pass over the two edited frontend files.
ARIA
d9260007d1