Fix web homing motion and synchronize preview state

web/react/src/XyzacToolPreview.tsx

@@ -119,6 +119,7 @@ export function XyzacToolPreview({ visual, view = "p", zoom = 1, rotateMode = fa
     let historyVertexCount = 0;
     let activeLiveLine: THREE.Line | null = null;
     let livePathEpoch = -1;
+    let poseEpoch = -1;
     let lastHistoryTick = -1;
     let lastActiveKey = "";
     let lastPreset = "";
@@ -165,6 +166,29 @@ export function XyzacToolPreview({ visual, view = "p", zoom = 1, rotateMode = fa
       const segments = state.toolpath as Segment[];
       const layer = layersRef.current;
       const now = performance.now();
+      // A HOME transaction can reset the canonical pose without advancing the
+      // simulation tick. Treat the source home sequence as an explicit pose
+      // barrier so stale queued jog samples cannot keep the old value on the
+      // HUD or tool marker. Keep the Live Plot history intact.
+      if (state.poseEpoch !== poseEpoch) {
+        poseEpoch = state.poseEpoch;
+        playbackQueue = [];
+        playbackStart = 0;
+        queuedLastTick = state.tick;
+        renderedTick = state.tick;
+        renderedPose = state.livePose;
+        renderedJoints = state.joints;
+        renderedActiveSegment = state.activeSegmentId ?? 0;
+        renderedProgress = state.activeProgress;
+        paintedTick = renderedTick;
+        paintedPose = renderedPose;
+        paintedJoints = renderedJoints;
+        paintedActiveSegment = renderedActiveSegment;
+        paintedProgress = renderedProgress;
+        liveTick = renderedTick;
+        if (activeLiveLine) { activeLiveLine.geometry.dispose(); liveGroup.remove(activeLiveLine); activeLiveLine = null; }
+        lastActiveKey = "";
+      }
       if (state.livePathEpoch !== livePathEpoch) {
         livePathEpoch = state.livePathEpoch;
         clearLines(liveGroup);