Log event creation to admin audit log, add back button, bump to 1.10.3

createEvent never called logAdminAction, even though 1.10.0 already
listed event_created as a filterable action on the audit-log page —
only updateEvent/deleteEvent actually logged. Event creation is now
logged the same way, at every return path including the legacy
pre-migration retry branches.

Also adds a "Back to dashboard" link to Admin -> Audit log, matching
the existing back-link pattern on the Cashup page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CSWFWQsjTc9GyffPiXEDQT

frontend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "hope-events-frontend",
-  "version": "1.10.2",
+  "version": "1.10.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "hope-events-frontend",
-      "version": "1.10.2",
+      "version": "1.10.3",
       "dependencies": {
         "@hookform/resolvers": "^5.2.1",
         "@radix-ui/react-accordion": "^1.2.11",