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

docs/performance-benchmarking.md

@@ -0,0 +1,131 @@
+# Performance Benchmarking Guide
+
+This guide explains how to run and interpret performance benchmarks.
+
+## Running Benchmarks
+
+### Run All Benchmarks
+
+```bash
+pnpm benchmark
+```
+
+This will:
+1. Benchmark encryption operations (small, medium, large data)
+2. Benchmark validation operations
+3. Save results to `benchmark-results.json`
+4. Check against performance thresholds
+
+## Benchmark Results
+
+### Encryption Benchmarks
+
+- **Small (< 1KB):** Target < 10ms
+- **Medium (1KB-100KB):** Target < 100ms
+- **Large (> 100KB):** Target < 1000ms
+
+### Validation Benchmarks
+
+- **1000 addresses:** Target < 100ms
+
+## Interpreting Results
+
+### Good Performance
+
+```
+Encryption Benchmarks:
+  Small (< 1KB): 5.23ms avg ✅
+  Medium (1KB-100KB): 45.67ms avg ✅
+  Large (> 100KB): 234.12ms avg ✅
+
+Validation Benchmarks:
+  1000 addresses: 67.89ms avg ✅
+
+✅ All benchmarks passed!
+```
+
+### Poor Performance
+
+```
+Encryption Benchmarks:
+  Small (< 1KB): 15.23ms avg ⚠️
+  Medium (1KB-100KB): 150.67ms avg ⚠️
+  Large (> 100KB): 2340.12ms avg ❌
+
+Validation Benchmarks:
+  1000 addresses: 200.89ms avg ⚠️
+
+⚠️  Small encryption exceeds threshold: 15.23ms > 10ms
+⚠️  Medium encryption exceeds threshold: 150.67ms > 100ms
+❌ Large encryption exceeds threshold: 2340.12ms > 1000ms
+⚠️  Validation exceeds threshold: 200.89ms > 100ms
+
+❌ Some benchmarks failed!
+```
+
+## CI/CD Integration
+
+Benchmarks run automatically:
+- Weekly on Sunday (via cron)
+- On pull requests to `main`
+- Manual workflow dispatch
+
+See `.github/workflows/performance.yml` for configuration.
+
+## Customizing Benchmarks
+
+### Adjust Thresholds
+
+Edit `scripts/performance-benchmark.js`:
+
+```javascript
+const thresholds = {
+  encryptionSmall: 10,    // Adjust as needed
+  encryptionMedium: 100,  // Adjust as needed
+  encryptionLarge: 1000,  // Adjust as needed
+  validation: 100,        // Adjust as needed
+};
+```
+
+### Add New Benchmarks
+
+```javascript
+function benchmarkNewFeature() {
+  const results = { times: [], avg: 0 };
+  
+  for (let i = 0; i < 100; i++) {
+    const start = performance.now();
+    // Your code here
+    const end = performance.now();
+    results.times.push(end - start);
+  }
+  
+  results.avg = results.times.reduce((a, b) => a + b, 0) / results.times.length;
+  return results;
+}
+```
+
+## Performance Optimization Tips
+
+### Encryption
+
+- Use Web Workers for large data
+- Cache encryption keys
+- Batch operations when possible
+
+### Validation
+
+- Use regex efficiently
+- Cache validation results
+- Batch validations
+
+### General
+
+- Profile before optimizing
+- Measure real-world usage
+- Set realistic targets
+
+## Resources
+
+- [Performance Benchmark Script](../scripts/performance-benchmark.js)
+- [CI/CD Workflow](../.github/workflows/performance.yml)