Say which camera profile a photograph renders through, and offer to copy it

The info panel gains a line under the lens: "Adobe Standard · in the
file", the .dcp it came from, "· off" when the photographer switched it
off, or "No camera profile · matrix only" — the ordinary case for a
CR2, worded as a fact rather than a failure. A DNG whose embedded
profile may be copied, for a body with no installed profile, also gets
"Use this profile for every Canon EOS 6D →", which saves it into the
profiles directory; the body's CR2s render through it from their next
decode.

The profiles directory is <data>/profiles, read at start-up on desktop
and Android before anything decodes. The library open path never set
the lens line; it now sets both. Labels: Camera Profile, Use Profile,
Look Amount.

ui/dr-ui/src/library/paths.rs

@@ -59,7 +59,7 @@ pub fn place_path(account: &Account) -> PathBuf {
 /// desktop declares nothing and takes the platform's data directory from
 /// `dr_plat::dirs` — XDG on Linux, `%LOCALAPPDATA%` on Windows — which keeps
 /// the established location on Linux rather than moving anyone's catalog.
-pub(super) fn data_root() -> PathBuf {
+pub(crate) fn data_root() -> PathBuf {
     match dr_sync::account::declared_data_dir() {
         Some(declared) => declared.join("darkroom"),
         None => dr_plat::base_dir(dr_plat::Base::Data),