fix sketch hover latch. add pattern warning if no anchor point selected

src/void/interact.js

@@ -310,6 +310,9 @@ const interact = {
             }
         }, () => {
             this.handleHover();
+            if (this.isSketchEditing()) {
+                this.handleSketchHover(null, []);
+            }
         });
 
         space.mouse.onDrag((delta, offset, isDone, intersections) => {

src/void/sketch/pointer.js

@@ -343,8 +343,7 @@ function handleSketchMouseUp(event, intersections) {
         const upHit = this.resolveSketchHit(event, intersections, feature);
         const hit = upHit
             || (pointerDown?.hitId ? { id: pointerDown.hitId, type: pointerDown?.hitType || null } : null)
-            || (pointerDown?.hoveredHitId ? { id: pointerDown.hoveredHitId, type: pointerDown?.hoveredHitType || null } : null)
-            || (this.hoveredSketchEntityId ? { id: this.hoveredSketchEntityId } : null);
+            || (pointerDown?.hoveredHitId ? { id: pointerDown.hoveredHitId, type: pointerDown?.hoveredHitType || null } : null);
         if (hit?.id) {
             if (dist > SKETCH_DRAG_START_PX && pointerDown?.hitId) {
                 // Intended drag gesture that failed to initialize; do not toggle select on mouse-up.

src/void/sketch/tools.js

@@ -173,7 +173,10 @@ function startSketchCircularPatternMode() {
     const feature = this.getEditingSketchFeature();
     if (!feature) return false;
     const centerRef = this.getSelectedSketchPatternCenter(feature);
-    if (!centerRef) return false;
+    if (!centerRef) {
+        window.alert('Circular pattern requires exactly one anchor point selected.');
+        return false;
+    }
     this.sketchCircularPatternMode = true;
     this.sketchCircularPatternCenterRef = centerRef;
     this.stopSketchMirrorMode?.();
@@ -206,7 +209,29 @@ function startSketchGridPatternMode() {
     const feature = this.getEditingSketchFeature();
     if (!feature) return false;
     const centerPointId = this.getSelectedSketchGridAnchor(feature);
-    if (!centerPointId) return false;
+    if (!centerPointId) {
+        window.alert('Grid pattern requires exactly one anchor point selected.');
+        return false;
+    }
+
+    // If line/arc sources are already selected, apply immediately.
+    const entities = Array.isArray(feature?.entities) ? feature.entities : [];
+    const byId = new Map(entities.filter(entity => entity?.id).map(entity => [entity.id, entity]));
+    const sourceIds = Array.from(this.selectedSketchEntities || [])
+        .filter(id => typeof id === 'string' && id && id !== centerPointId && !id.startsWith('arc-center:'))
+        .filter(id => {
+            const ent = byId.get(id);
+            return ent?.type === 'line' || ent?.type === 'arc';
+        });
+    if (sourceIds.length) {
+        const applied = this.gridPatternSelectedSketchGeometry?.({
+            centerRef: centerPointId,
+            sourceIds,
+            keepResultSelected: false
+        });
+        if (applied) return true;
+    }
+
     this.sketchGridPatternMode = true;
     this.sketchGridPatternCenterRef = centerPointId;
     this.stopSketchMirrorMode?.();