fix(chat): make group-chat author labels readable

Author name above group bubbles was 8px dim-grey pixel font — visible
in theory, invisible in practice. Bump to 10px semibold accent,
left-aligned above the incoming bubble it labels.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

electron/package.json

@@ -1,6 +1,6 @@
 {
   "name": "hyprcrd",
-  "version": "1.9.4",
+  "version": "1.9.5",
   "description": "hyprcrd — self-hosted card manager",
   "main": "main.js",
   "scripts": {