Live Paint: Live Paint Selection does nothing on a triple-click

main's Live Paint Selection double-click (#7342) replaced the tool's
catch-all pointer arm with an explicit DoubleClick arm, so the
TripleClick kind this branch adds left the match non-exhaustive. The
tool now takes no action on TripleClick: the third click's press and
release already select what a click selects, as before the merge.

The merge also took main's import list in the engine's Live Paint
commands, which no longer named Paint while this branch's Merge code
still uses it; Paint is imported again.

crates/engine/src/cmd/buildcmds/live_paint.rs

@@ -1,7 +1,7 @@
 use super::{
-    Appearance, Arc, Beside, Document, EDGE_NAME, EngineError, FACE_NAME, GapOptions, GapSize, LIVE_PAINT_NAME, Node, NodeId, PathData, Point, Rect,
-    Result, SOURCES_NAME, Selection, Session, SubPath, Value, b, bad, build_children, edge_near, face_at, finite, ids_json, is_live_paint, json,
-    number_or, object_param, paint_from, po, point_param, repaint_from, replace_roots, root_ids, source_nodes, source_shapes, switch_or,
+    Appearance, Arc, Beside, Document, EDGE_NAME, EngineError, FACE_NAME, GapOptions, GapSize, LIVE_PAINT_NAME, Node, NodeId, Paint, PathData, Point,
+    Rect, Result, SOURCES_NAME, Selection, Session, SubPath, Value, b, bad, build_children, edge_near, face_at, finite, ids_json, is_live_paint,
+    json, number_or, object_param, paint_from, po, point_param, repaint_from, replace_roots, root_ids, source_nodes, source_shapes, switch_or,
 };
 
 /// `options` as stored on a Live Paint group: none for the defaults.

crates/tools/src/builder/live_paint.rs

@@ -907,6 +907,8 @@ impl Tool for LivePaintSelectionTool {
                     (false, false) => vec![Action::Exec("select.set".into(), json!({ "ids": json_ids(&ids) }))],
                 }
             }
+            // The third click's press and release already selected what a click selects.
+            PointerKind::TripleClick => vec![],
         }
     }
 

crates/tools/src/builder/tests.rs

@@ -2506,6 +2506,22 @@ fn live_paint_selection_double_click_selects_connected_faces_or_edges() {
     assert!(dbl(&mut t, 25.0, 1.0, alt).is_empty());
 }
 
+#[test]
+fn live_paint_selection_triple_click_adds_nothing_to_its_clicks() {
+    let mut d = Document::new(500.0, 500.0);
+    let (_, [a, ..], _) = live_strip(&mut d);
+    let s = Selection::default();
+    let p = paint();
+    let cx = cx(&d, &s, &p);
+    let mut t = LivePaintSelectionTool::default();
+    // The third click's press and release select the face under the pointer, as a click does.
+    assert_eq!(lp_click(&mut t, &cx, ev(PointerKind::Down, 25.0, 25.0)), vec![Action::Exec("select.set".into(), json!({ "ids": [a.0] }))]);
+    for m in [Mods::default(), Mods { alt: true, ..Default::default() }, Mods { shift: true, ..Default::default() }] {
+        assert!(t.pointer(&cx, &ev(PointerKind::TripleClick, 25.0, 25.0).with_mods(m)).is_empty());
+        assert!(t.pointer(&cx, &ev(PointerKind::TripleClick, 25.0, 1.0).with_mods(m)).is_empty());
+    }
+}
+
 #[test]
 fn live_paint_selection_double_click_skips_locked_groups_and_art_outside_isolation() {
     let mut d = Document::new(500.0, 500.0);