fix: separate pill clicks from carousel drag with bottom drag zone

resources/js/components/gallery/CategoryPillCarousel.jsx

@@ -12,11 +12,14 @@ export default function CategoryPillCarousel({
 }) {
   const viewportRef = useRef(null);
   const stripRef = useRef(null);
+  const dragZoneRef = useRef(null);
   const animationRef = useRef(0);
+  const suppressClickRef = useRef(false);
   const dragStateRef = useRef({
     active: false,
-    moved: false,
+    started: false,
     pointerId: null,
+    pointerType: 'mouse',
     startX: 0,
     startOffset: 0,
   });
@@ -154,10 +157,13 @@ export default function CategoryPillCarousel({
 
   useEffect(() => {
     const strip = stripRef.current;
-    if (!strip) return;
+    const dragZone = dragZoneRef.current;
+    if (!strip || !dragZone) return;
 
     const onPointerDown = (event) => {
-      if (event.pointerType === 'mouse' && event.button !== 0) return;
+      const isMouse = event.pointerType === 'mouse';
+      const fromDragZone = event.currentTarget === dragZone;
+      if (isMouse && !fromDragZone) return;
 
       if (animationRef.current) {
         cancelAnimationFrame(animationRef.current);
@@ -165,18 +171,17 @@ export default function CategoryPillCarousel({
       }
 
       dragStateRef.current.active = true;
-      dragStateRef.current.moved = false;
+      dragStateRef.current.started = false;
       dragStateRef.current.pointerId = event.pointerId;
+      dragStateRef.current.pointerType = event.pointerType || 'mouse';
       dragStateRef.current.startX = event.clientX;
       dragStateRef.current.startOffset = offset;
 
-      setDragging(true);
+      setDragging(false);
 
       if (strip.setPointerCapture) {
         try { strip.setPointerCapture(event.pointerId); } catch (_) { /* no-op */ }
       }
-
-      event.preventDefault();
     };
 
     const onPointerMove = (event) => {
@@ -184,7 +189,20 @@ export default function CategoryPillCarousel({
       if (!state.active || state.pointerId !== event.pointerId) return;
 
       const dx = event.clientX - state.startX;
-      if (Math.abs(dx) > 3) state.moved = true;
+      const threshold = state.pointerType === 'touch' ? 12 : 8;
+      if (!state.started) {
+        if (Math.abs(dx) <= threshold) {
+          return;
+        }
+
+        state.started = true;
+        setDragging(true);
+      }
+
+      if (state.started) {
+        event.preventDefault();
+      }
+
       moveTo(state.startOffset + dx);
     };
 
@@ -192,7 +210,9 @@ export default function CategoryPillCarousel({
       const state = dragStateRef.current;
       if (!state.active || state.pointerId !== event.pointerId) return;
 
+      suppressClickRef.current = state.started;
       state.active = false;
+      state.started = false;
       state.pointerId = null;
       setDragging(false);
 
@@ -202,10 +222,10 @@ export default function CategoryPillCarousel({
     };
 
     const onClickCapture = (event) => {
-      if (!dragStateRef.current.moved) return;
+      if (!suppressClickRef.current) return;
       event.preventDefault();
       event.stopPropagation();
-      dragStateRef.current.moved = false;
+      suppressClickRef.current = false;
     };
 
     strip.addEventListener('pointerdown', onPointerDown);
@@ -214,12 +234,22 @@ export default function CategoryPillCarousel({
     strip.addEventListener('pointercancel', onPointerUpOrCancel);
     strip.addEventListener('click', onClickCapture, true);
 
+    dragZone.addEventListener('pointerdown', onPointerDown);
+    dragZone.addEventListener('pointermove', onPointerMove);
+    dragZone.addEventListener('pointerup', onPointerUpOrCancel);
+    dragZone.addEventListener('pointercancel', onPointerUpOrCancel);
+
     return () => {
       strip.removeEventListener('pointerdown', onPointerDown);
       strip.removeEventListener('pointermove', onPointerMove);
       strip.removeEventListener('pointerup', onPointerUpOrCancel);
       strip.removeEventListener('pointercancel', onPointerUpOrCancel);
       strip.removeEventListener('click', onClickCapture, true);
+
+      dragZone.removeEventListener('pointerdown', onPointerDown);
+      dragZone.removeEventListener('pointermove', onPointerMove);
+      dragZone.removeEventListener('pointerup', onPointerUpOrCancel);
+      dragZone.removeEventListener('pointercancel', onPointerUpOrCancel);
     };
   }, [moveTo, offset]);
 
@@ -277,6 +307,12 @@ export default function CategoryPillCarousel({
       >
         <svg viewBox="0 0 20 20" fill="currentColor" className="w-[18px] h-[18px]" aria-hidden="true"><path fillRule="evenodd" d="M7.293 14.707a1 1 0 010-1.414L10.586 10 7.293 6.707a1 1 0 011.414-1.414l4 4a1 1 0 010 1.414l-4 4a1 1 0 01-1.414 0z" clipRule="evenodd"/></svg>
       </button>
+
+      <div
+        ref={dragZoneRef}
+        className="nb-react-drag-zone"
+        aria-hidden="true"
+      />
     </div>
   );
 }