bump to v1.6.1 — bug fixes + security hardening

Changes in 1.6.1:
- Fix: duplicate nsec import prevention
- Fix: save button debounce
- Fix: auto-dedup on unlock
- New: delete from profile view
- New: Manage Profiles page (multi-select delete)
- New: first-unlock vs re-lock messaging
- Security: unlock brute-force protection
- Security: permission request rate limiting per origin

Author: vveerrgg

distros/safari/api-keys/api-keys.build.js

@@ -3,7 +3,7 @@
     "default_locale": "en",
     "name": "__MSG_extension_name__",
     "description": "__MSG_extension_description__",
-    "version": "1.6.0",
+    "version": "1.6.1",
     "author": "Humanjava Enterprises Inc",
     "homepage_url": "https://nostrkey.com",
     "icons": {