0.5.4: scrub head tapers into the playhead needle

Pentagon clip-path on the scrub handle head (flat top, straight sides
down to 55% height, triangle point at the bottom center) so the head
visually funnels into the 1px playhead needle below. box-shadow
replaced with a drop-shadow filter that respects the clip-path.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "animatr",
   "private": true,
-  "version": "0.5.3",
+  "version": "0.5.4",
   "type": "module",
   "scripts": {
     "dev": "vite",