fix(installer): kill pre-extraction process directly so no orphan native host remains after install

Made-with: Cursor

scripts/install.sh

@@ -87,7 +87,7 @@ if [[ "$PLATFORM" == "darwin" ]]; then
   BARE_TMPDIR="${TMPDIR:-/tmp}"
 
   echo "  Pre-extracting native addons..."
-  ("$HOST_BIN" >/dev/null 2>&1; true) &
+  "$HOST_BIN" >/dev/null 2>&1 &
   BGPID=$!
 
   # Wait up to 10s for addons to be extracted
@@ -98,8 +98,12 @@ if [[ "$PLATFORM" == "darwin" ]]; then
   done
   sleep 1
 
+  # Kill the pre-extraction process and any child processes it may have spawned
   kill $BGPID 2>/dev/null || true
+  pkill -P $BGPID 2>/dev/null || true
   wait $BGPID 2>/dev/null || true
+  # Belt-and-suspenders: kill any lingering instance not attached to Chrome
+  pkill -f "holesail-browser-host$" 2>/dev/null || true
 
   # Sign all .bare and .dylib files in every extraction dir for this binary
   SIGNED=0