copilot suggestion fix

Author: Andrii Ovcharenko

src/model/internal-hit-test.ts

@@ -1,7 +1,11 @@
 import type { HoveredItemType } from './chart-model';
 
 /**
- * Internal hit-test priority used to break ties between overlapping candidates.
+ * Internal hit-test priority used for hover arbitration.
+ *
+ * Point hits receive a special override over non-point hits. Otherwise distance
+ * decides, and equal-distance non-point ties preserve the existing visual/source
+ * order instead of preferring a higher numeric priority.
  */
 export enum HitTestPriority {
 	/**
@@ -120,6 +124,7 @@ export function isBetterHit(candidate: InternalHitTestCandidate, currentBest: In
 		return candidate.distance < currentBest.distance;
 	}
 
-	// return candidate.priority > currentBest.priority;
+	// Preserve the existing draw/source order for equal-distance non-point ties.
+	// This prevents hidden strokes from overtaking visually covering range hits.
 	return false;
 }

src/model/ipane-primitive.ts

@@ -95,6 +95,10 @@ export interface PrimitiveHoveredItem {
 	 * - `0` for range-style hits such as covered regions
 	 * - `1` for line-style hits such as strokes
 	 * - `2` for point-style hits such as explicit markers
+	 *
+	 * Point-style hits receive special precedence over non-point hits. Otherwise
+	 * distance decides, and equal-distance non-point ties preserve the existing
+	 * visual/source order.
 	 */
 	hitTestPriority?: number;
 	/**

src/model/pane-hit-test.ts

@@ -34,14 +34,15 @@ function itemTypeFromCandidate(source: IPrimitiveHitTestSource, candidate: Inter
 	}
 
 	if (source instanceof Series) {
-		if (source.seriesType() === 'Custom') {
-			return 'custom';
-		}
-		// Built-in series pane-view hit tests never set externalId;
-		// only price-line renderer hits (horizontal-line-renderer) do.
+		// Pane-view series hits never tag themselves as price lines; the
+		// horizontal-line renderer path does so via `externalId`, including
+		// custom-series price lines.
 		if (candidate.externalId !== undefined) {
 			return 'price-line';
 		}
+		if (source.seriesType() === 'Custom') {
+			return 'custom';
+		}
 		switch (candidate.priority) {
 			case HitTestPriority.Point:
 				return 'series-point';