fix(voice): amplitude meter was masked by the dross-rec keyframe animation (2.14.1)

CSS animations override normal declarations — the old box-shadow pulse painted
over the level-driven shadow. .metered now disables the fallback pulse; added
sqrt gain so speech registers visibly.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "void-server",
-  "version": "2.14.0",
+  "version": "2.14.1",
   "type": "module",
   "private": true,
   "scripts": {