frontend/components/layout/TabBar.tsx

@@ -285,6 +285,11 @@ export function TabBar() {
     if ((e.target as HTMLElement).closest("button")) return;
     if (dragState?.settling) return;
 
+    if (settleTimer.current) {
+      clearTimeout(settleTimer.current);
+      settleTimer.current = null;
+    }
+
     e.preventDefault();
     (e.currentTarget as HTMLElement).setPointerCapture(e.pointerId);
 
@@ -304,6 +309,7 @@ export function TabBar() {
   const handlePointerMove = useCallback(
     (e: React.PointerEvent) => {
       if (!dragState || dragState.settling) return;
+      if (e.pointerId !== dragState.pointerId) return;
       const bar = containerRef.current?.getBoundingClientRect();
       if (!bar) return;
 
@@ -334,6 +340,7 @@ export function TabBar() {
   const handlePointerUp = useCallback(
     (e: React.PointerEvent) => {
       if (!dragState || dragState.settling) return;
+      if (e.pointerId !== dragState.pointerId) return;
       (e.currentTarget as HTMLElement).releasePointerCapture(e.pointerId);
 
       if (!dragState.activated) {
@@ -365,6 +372,16 @@ export function TabBar() {
     [dragState, tabs, displayVisible, switchTab, updateTabOrder],
   );
 
+  const handleLostPointerCapture = useCallback(() => {
+    if (dragState && !dragState.settling) {
+      setDragState(null);
+      if (settleTimer.current) {
+        clearTimeout(settleTimer.current);
+        settleTimer.current = null;
+      }
+    }
+  }, [dragState]);
+
   // ============================================================
   // 스타일 계산
   // ============================================================
@@ -471,6 +488,7 @@ export function TabBar() {
         onPointerDown={(e) => handlePointerDown(e, tab.id, displayIndex)}
         onPointerMove={handlePointerMove}
         onPointerUp={handlePointerUp}
+        onLostPointerCapture={handleLostPointerCapture}
         onContextMenu={(e) => handleContextMenu(e, tab.id)}
         className={cn(
           "group relative flex h-7 shrink-0 cursor-pointer items-center gap-0.5 rounded-t-md border border-b-0 px-3 select-none",