fix: update submodules to latest remote before staging in sync.sh

git add -A captured the stale submodule pointer on Howard's machine
(April 18 init, not updated) and committed it, causing a conflict.
Now sync always runs git submodule update --remote first so the pointer
is current before staging.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/scripts/sync.sh

@@ -65,6 +65,12 @@ echo -e "${GREEN}[OK]${NC} Syncing as: $USER_DISPLAY (machine: $MACHINE)"
 echo ""
 echo "=== Phase 1: Local changes ==="
 
+# Update submodules to latest remote before staging so we never commit a stale pointer
+if [ -f ".gitmodules" ]; then
+    echo -e "${GREEN}[OK]${NC} Updating submodules to latest remote..."
+    git submodule update --remote --quiet 2>/dev/null || true
+fi
+
 if ! git diff-index --quiet HEAD -- 2>/dev/null; then
     echo -e "${YELLOW}[INFO]${NC} Local changes detected:"
     git status --short