Add Remove button to Contacts panel; v1.1.2

Grouped contacts now have a Remove button that deletes all submissions
for that email address in one click (with confirmation).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "1.1.1",
+  "version": "1.1.2",
   "type": "module",
   "scripts": {
     "dev": "vite",