LRC-LIB-KEYWORDS: a set keyword toggles off whatever its case

`keyword.toggleFromSet` checked whether every target photo had the
keyword by ASCII case, while the set's buttons and the rest of the
keyword code match any letter's case: with "ÄRZTE" and "ärzte" on the
photos the button showed on, but ⌥N added the keyword (a no-op) instead
of taking it off, so it could never be toggled off.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/keywords.rs

@@ -184,7 +184,11 @@ pub fn specs() -> Vec<CommandSpec> {
                 };
                 let ids = s.targets(p);
                 let all = !ids.is_empty()
-                    && ids.iter().all(|id| s.catalog.photo(*id).is_some_and(|ph| ph.meta.keywords.iter().any(|x| x.eq_ignore_ascii_case(&k))));
+                    && ids.iter().all(|id| {
+                        s.catalog
+                            .photo(*id)
+                            .is_some_and(|ph| ph.meta.keywords.iter().any(|x| lightcraft_catalog::keywords::same(&clean(x), &clean(&k))))
+                    });
                 let ids: Vec<u64> = ids.iter().map(|i| i.0).collect();
                 let key = if all { "removeKeywords" } else { "addKeywords" };
                 // applying from Recent Keywords mustn't reshuffle the numbers under the keys