chore(release): 4.63.2 [skip ci]

## [4.63.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.63.1...v4.63.2) (2025-10-21)

### Bug Fixes

* **flashcards:** correct pivot point to rotate around card center ([50fc3fd](50fc3fdf7f))

CHANGELOG.md

@@ -1,3 +1,17 @@
+## [4.63.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.63.1...v4.63.2) (2025-10-21)
+
+
+### Bug Fixes
+
+* **flashcards:** correct pivot point to rotate around card center ([50fc3fd](https://github.com/antialias/soroban-abacus-flashcards/commit/50fc3fdf7f2c9b7412f6d7d890f5e0d52cb86a9b))
+
+## [4.63.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.63.0...v4.63.1) (2025-10-21)
+
+
+### Bug Fixes
+
+* **flashcards:** increase rotation sensitivity 10x for visible grab point physics ([c0fa926](https://github.com/antialias/soroban-abacus-flashcards/commit/c0fa926d16d02c1bfe880b7f0056a760e8461b3b))
+
 ## [4.63.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.62.1...v4.63.0) (2025-10-21)
 
 

apps/web/src/components/InteractiveFlashcards.tsx

@@ -191,18 +191,60 @@ function DraggableCard({ card }: DraggableCardProps) {
     // If grabbed on left and dragged right → clockwise rotation
     // If grabbed on right and dragged left → counter-clockwise rotation
     const crossProduct = grabOffsetRef.current.x * deltaY - grabOffsetRef.current.y * deltaX
-    const rotationInfluence = crossProduct / 5000 // Scale factor for reasonable rotation (adjust as needed)
+    const rotationInfluence = crossProduct / 500 // Reduced scale factor for more visible rotation
     const newRotation = baseRotationRef.current + rotationInfluence
 
     // Clamp rotation to prevent excessive spinning
     const clampedRotation = Math.max(-45, Math.min(45, newRotation))
     setRotation(clampedRotation)
 
-    // Update card position
-    setPosition({
-      x: dragStartRef.current.cardX + deltaX,
-      y: dragStartRef.current.cardY + deltaY,
-    })
+    // Log rotation changes occasionally (same throttle as shadow logging)
+    const timeSinceLastLog = now - lastLogTimeRef.current
+    if (timeSinceLastLog > 200) {
+      console.log(
+        `[GrabPoint] Rotation: ${clampedRotation.toFixed(1)}° (influence: ${rotationInfluence.toFixed(1)}°, cross: ${crossProduct.toFixed(0)})`
+      )
+    }
+
+    // Update card position - keep the grab point "stuck" to the cursor
+    // As the card rotates, the grab point rotates with it, so we need to account for rotation
+    const rotationRad = (clampedRotation * Math.PI) / 180
+    const cosRot = Math.cos(rotationRad)
+    const sinRot = Math.sin(rotationRad)
+
+    // Rotate the grab offset by the current rotation angle
+    const rotatedGrabX = grabOffsetRef.current.x * cosRot - grabOffsetRef.current.y * sinRot
+    const rotatedGrabY = grabOffsetRef.current.x * sinRot + grabOffsetRef.current.y * cosRot
+
+    // Current cursor position
+    const cursorX = e.clientX
+    const cursorY = e.clientY
+
+    // Card center should be at: cursor position - rotated grab offset
+    // But we need to position the card element (top-left), not the center
+    // Get card dimensions to calculate offset from center to top-left
+    if (cardRef.current) {
+      const rect = cardRef.current.getBoundingClientRect()
+      const cardWidth = rect.width
+      const cardHeight = rect.height
+
+      // Card center position in screen space
+      const cardCenterX = cursorX - rotatedGrabX
+      const cardCenterY = cursorY - rotatedGrabY
+
+      // Convert center position to top-left position (what we store in position state)
+      // Note: position.x/y is used in translate(), which positions the element
+      setPosition({
+        x: cardCenterX - cardWidth / 2,
+        y: cardCenterY - cardHeight / 2,
+      })
+    } else {
+      // Fallback to simple delta if we don't have card dimensions yet
+      setPosition({
+        x: dragStartRef.current.cardX + deltaX,
+        y: dragStartRef.current.cardY + deltaY,
+      })
+    }
   }
 
   const handlePointerUp = (e: React.PointerEvent) => {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.63.0",
+  "version": "4.63.2",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [