**Motivations:**
- Fix Next.js 16.1.1 warning about unsupported eslint configuration
- Remove deprecated eslint option from next.config.js
**Root causes:**
- Next.js 16+ no longer supports eslint configuration in next.config.js
- The eslint option has been moved to command-line options or .eslintrc.json
**Correctifs:**
- Removed eslint configuration block from next.config.js
- Added comment explaining the change and alternatives
**Evolutions:**
- None
**Pages affectées:**
- next.config.js
- Remove nos2x and NostrConnect support
- Create new NostrAuthService using Alby (window.nostr NIP-07)
- Replace useNostrConnect with useNostrAuth in all components
- Update NostrRemoteSigner to use Alby for signing
- Delete NostrConnect-related files (nostrconnect.ts, handlers, etc.)
- Update documentation to reflect Alby-only authentication
- Remove NOSTRCONNECT_BRIDGE environment variable
- All TypeScript checks pass
- Update NostrConnectService to use nos2x (window.nostr) by default
- Fallback to NostrConnect bridge only if nos2x is not available
- Update NostrRemoteSigner to use window.nostr.signEvent() for signing
- Add TypeScript definitions for NIP-07 window.nostr API
- Update documentation to reflect nos2x as primary authentication method
- Remove default use.nsec.app bridge URL
- All TypeScript checks pass
