Fix Nostr login functionality

- Fix NIP-07 extension login using NDKNip07Signer
- Fix NDK initialization to not block on relay connection
- Read relay URLs from VITE_DEFAULT_RELAYS env variable
- Add proper error handling for all login methods
- Remove NIP-55 option (Android only, not for web)
- Add vite-env.d.ts for TypeScript support
- Update .gitignore to exclude dist/ and .env

.gitignore

@@ -0,0 +1,35 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Cache
+.cache/
+*.tsbuildinfo