feat: comprehensive project improvements and fixes

- Fix all TypeScript compilation errors (40+ fixes)
  - Add missing type definitions (TransactionRequest, SafeInfo)
  - Fix TransactionRequestStatus vs TransactionStatus confusion
  - Fix import paths and provider type issues
  - Fix test file errors and mock providers

- Implement comprehensive security features
  - AES-GCM encryption with PBKDF2 key derivation
  - Input validation and sanitization
  - Rate limiting and nonce management
  - Replay attack prevention
  - Access control and authorization

- Add comprehensive test suite
  - Integration tests for transaction flow
  - Security validation tests
  - Wallet management tests
  - Encryption and rate limiter tests
  - E2E tests with Playwright

- Add extensive documentation
  - 12 numbered guides (setup, development, API, security, etc.)
  - Security documentation and audit reports
  - Code review and testing reports
  - Project organization documentation

- Update dependencies
  - Update axios to latest version (security fix)
  - Update React types to v18
  - Fix peer dependency warnings

- Add development tooling
  - CI/CD workflows (GitHub Actions)
  - Pre-commit hooks (Husky)
  - Linting and formatting (Prettier, ESLint)
  - Security audit workflow
  - Performance benchmarking

- Reorganize project structure
  - Move reports to docs/reports/
  - Clean up root directory
  - Organize documentation

- Add new features
  - Smart wallet management (Gnosis Safe, ERC4337)
  - Transaction execution and approval workflows
  - Balance management and token support
  - Error boundary and monitoring (Sentry)

- Fix WalletConnect configuration
  - Handle missing projectId gracefully
  - Add environment variable template

.github/workflows/security-audit.yml

@@ -0,0 +1,34 @@
+name: Security Audit
+
+on:
+  schedule:
+    # Run weekly on Monday
+    - cron: '0 0 * * 1'
+  workflow_dispatch:
+  push:
+    branches: [ main, develop ]
+
+jobs:
+  audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: pnpm/action-setup@v2
+        with:
+          version: 9
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+          cache: 'pnpm'
+      - run: pnpm install
+      - name: Run npm audit
+        run: pnpm audit --audit-level=moderate
+      - name: Run security tests
+        run: pnpm test:security
+      - name: Check for known vulnerabilities
+        run: |
+          pnpm audit --json > audit-results.json || true
+          if [ -s audit-results.json ]; then
+            echo "Vulnerabilities found. Review audit-results.json"
+            exit 1
+          fi