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/PROJECT_ORGANIZATION.md

@@ -0,0 +1,112 @@
+# Project Organization
+
+This document describes the organization of the Impersonator project after cleanup and reorganization.
+
+## Directory Structure
+
+```
+impersonator/
+├── app/                          # Next.js App Router
+├── components/                   # React components
+├── contexts/                     # React contexts
+├── helpers/                      # Helper functions
+├── utils/                        # Utility functions
+├── __tests__/                    # Test files
+├── docs/                         # Documentation
+│   ├── security/                # Security documentation
+│   └── reports/                 # Reports and reviews
+├── public/                      # Static assets
+├── style/                        # Styles and themes
+├── .github/                      # GitHub configuration
+│   ├── workflows/               # CI/CD workflows
+│   └── dependabot.yml          # Dependency updates
+├── .husky/                       # Git hooks
+├── types.ts                      # TypeScript types
+├── package.json                  # Dependencies
+├── tsconfig.json                 # TypeScript config
+├── next.config.js                # Next.js config
+├── jest.config.js                # Jest config
+├── jest.setup.js                 # Jest setup
+├── vercel.json                   # Vercel config
+└── README.md                     # Project README
+```
+
+## File Organization
+
+### Documentation Files
+
+**Root Level:**
+- `README.md` - Main project README
+- `LICENSE.md` - License file
+- `PROJECT_ORGANIZATION.md` - This file
+
+**docs/ Directory:**
+- Main documentation (01-12 numbered guides)
+- `RECOMMENDATIONS_AND_NEXT_STEPS.md` - Recommendations
+- `EXECUTIVE_RECOMMENDATIONS_SUMMARY.md` - Executive summary
+- `QUICK_REFERENCE.md` - Quick reference
+
+**docs/security/ Directory:**
+- All security audit documents
+- Security implementation guides
+- Security testing guides
+
+**docs/reports/ Directory:**
+- Code review reports
+- Testing reports
+- Completion summaries
+
+### Configuration Files
+
+**Root Level:**
+- `package.json` - Dependencies and scripts
+- `tsconfig.json` - TypeScript configuration
+- `next.config.js` - Next.js configuration
+- `jest.config.js` - Jest configuration
+- `jest.setup.js` - Jest setup
+- `vercel.json` - Vercel deployment
+- `.gitignore` - Git ignore rules
+- `.nvmrc` - Node version
+- `.editorconfig` - Editor configuration
+- `.prettierrc` - Prettier configuration
+- `.prettierignore` - Prettier ignore rules
+
+**.github/ Directory:**
+- `workflows/ci.yml` - CI/CD pipeline
+- `workflows/security-audit.yml` - Security audit workflow
+- `dependabot.yml` - Dependency updates
+
+**.husky/ Directory:**
+- `pre-commit` - Pre-commit hook
+
+## Cleanup Summary
+
+### Files Moved
+- Security documents → `docs/security/`
+- Reports → `docs/reports/`
+
+### Files Kept in Root
+- `README.md` - Main entry point
+- `LICENSE.md` - Legal requirement
+- Configuration files (package.json, tsconfig.json, etc.)
+- Source code directories
+
+### Files Created
+- `.nvmrc` - Node version specification
+- `.editorconfig` - Editor configuration
+- `.prettierrc` - Code formatting
+- `.prettierignore` - Prettier ignore rules
+- `.husky/pre-commit` - Pre-commit hook
+- `.lintstagedrc.js` - Lint-staged configuration
+- `.github/dependabot.yml` - Dependency updates
+- `.github/workflows/security-audit.yml` - Security audit
+- Sentry configuration files
+- Documentation index files
+
+## Best Practices
+
+1. **Keep root clean** - Only essential files in root
+2. **Organize by type** - Group related files
+3. **Document structure** - Keep this file updated
+4. **Use subdirectories** - For related files
+5. **Follow conventions** - Standard naming and structure