Release v1.1.3 - Add NIP-49 ncryptsec export feature

- Add ncryptsec page for exporting encrypted private keys (NIP-49)
- Implement password-based encryption using scrypt + XChaCha20-Poly1305
- Display QR code for easy mobile scanning of encrypted key
- Add click-to-copy functionality for ncryptsec string
- Add privkeyToNcryptsec() method to NostrHelper using nostr-tools nip49

Files modified:
- projects/common/src/lib/helpers/nostr-helper.ts
- projects/chrome/src/app/app.routes.ts
- projects/chrome/src/app/components/edit-identity/keys/keys.component.*
- projects/chrome/src/app/components/edit-identity/ncryptsec/ (new)
- projects/firefox/src/app/app.routes.ts
- projects/firefox/src/app/components/edit-identity/keys/keys.component.*
- projects/firefox/src/app/components/edit-identity/ncryptsec/ (new)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

projects/firefox/public/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 3,
   "name": "Plebeian Signer",
   "description": "Nostr Identity Manager & Signer",
-  "version": "1.1.2",
+  "version": "1.1.3",
   "homepage_url": "https://github.com/PlebeianApp/plebeian-signer",
   "options_page": "options.html",
   "permissions": [