LRC-LIB-KEYWORDS: dropping photos on a keyword counts those that get it

The toast said every dropped photo got the keyword, those that had it
already included. It now counts the photos that didn't have it.

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

crates/ui-egui/src/panels/keyword_list.rs

@@ -285,7 +285,14 @@ fn drop_target(app: &mut LightcraftApp, ui: &mut egui::Ui, rect: Rect, path: &st
     } else if let Some(ids) = app.ui.dragging_photos.clone() {
         outline(ui);
         if released {
-            let n = ids.len();
+            // only the photos that didn't have it get it
+            let lacking = |id: &u64| {
+                app.session
+                    .catalog
+                    .photo(PhotoId(*id))
+                    .is_some_and(|p| !p.meta.keywords.iter().any(|k| same(&lightcraft_catalog::keywords::clean(k), path)))
+            };
+            let n = ids.iter().filter(|id| lacking(id)).count();
             app.ui.dragging_photos = None;
             match app.run("photo.setMeta", json!({"ids": ids, "addKeywords": [path]})) {
                 Ok(_) => app.toast(

crates/ui-egui/src/tests_keyword_list.rs

@@ -417,3 +417,14 @@ fn typed_keywords_go_inside_the_default_parent() {
         assert!(k.contains(&want.to_string()), "{want}: {k:?}");
     }
 }
+
+/// Dropping photos on a keyword says how many got it: one that had it already isn't counted.
+#[test]
+fn dropping_photos_counts_those_that_get_the_keyword() {
+    let (mut h, ids) = keywords_panel_at([1400.0, 2400.0]);
+    run(&mut h, "keyword.create", json!({"name": "Portugal"}));
+    run(&mut h, "photo.setMeta", json!({"ids": [ids[1]], "addKeywords": ["Portugal"]}));
+    drag(&mut h, &format!("thumb:{}", ids[0]), "keywordRow:Portugal");
+    let toast = h.app.ui.toast.clone().map(|t| t.0).unwrap_or_default();
+    assert!(toast.contains("1 photo") && !toast.contains("2 photos"), "{toast}");
+}