fix: avatar fills full circle + badge outside overflow

- Square avatar image (no circle mask) — CSS border-radius handles clipping
- Badge moved outside .sa-fab to separate wrapper, not clipped by overflow:hidden
- object-fit: cover ensures image fills entire circle

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

manifest.json

@@ -3,7 +3,7 @@
     "module": "SmartAssistant",
     "description": "Unified AI Assistant for Legal CRM — floating chat with case memory, office alerts, and AI Gateway integration",
     "author": "klear",
-    "version": "2.1.1",
+    "version": "2.1.2",
     "acceptableVersions": [
         ">=8.0.0"
     ],