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

types.ts

@@ -45,6 +45,8 @@ export interface SafeInfo {
   safeAddress: string;
   network: LowercaseNetworks;
   ethBalance: string;
+  owners?: string[];
+  threshold?: number;
 }
 export interface InterfaceMessageToPayload {
   [INTERFACE_MESSAGES.ON_SAFE_INFO]: SafeInfo;
@@ -535,3 +537,117 @@ export interface Transaction {
   value: string;
   data: string;
 }
+
+// ======= Smart Wallet Types ======
+
+export enum SmartWalletType {
+  GNOSIS_SAFE = "GNOSIS_SAFE",
+  ERC4337 = "ERC4337",
+  CUSTOM = "CUSTOM",
+}
+
+export interface SmartWalletConfig {
+  id: string;
+  type: SmartWalletType;
+  address: string;
+  networkId: number;
+  owners: string[];
+  threshold: number;
+  createdAt: number;
+  updatedAt: number;
+}
+
+export interface OwnerInfo {
+  address: string;
+  label?: string;
+  ensName?: string;
+}
+
+export enum TransactionExecutionMethod {
+  DIRECT_ONCHAIN = "DIRECT_ONCHAIN",
+  RELAYER = "RELAYER",
+  SIMULATION = "SIMULATION",
+}
+
+export interface TransactionRequest {
+  id: string;
+  from: string;
+  to: string;
+  value: string;
+  data: string;
+  gasLimit?: string;
+  gasPrice?: string;
+  maxFeePerGas?: string;
+  maxPriorityFeePerGas?: string;
+  nonce?: number;
+  method: TransactionExecutionMethod;
+  status: TransactionRequestStatus;
+  hash?: string;
+  createdAt: number;
+  executedAt?: number;
+  expiresAt?: number;
+  error?: string;
+}
+
+// TransactionStatus enum already defined above (line 171)
+// Removed duplicate definition
+export enum TransactionRequestStatus {
+  PENDING = "PENDING",
+  APPROVED = "APPROVED",
+  REJECTED = "REJECTED",
+  EXECUTING = "EXECUTING",
+  SUCCESS = "SUCCESS",
+  FAILED = "FAILED",
+}
+
+export interface TokenBalance {
+  tokenAddress: string;
+  symbol: string;
+  name: string;
+  decimals: number;
+  balance: string;
+  balanceFormatted: string;
+  usdValue?: string;
+  logoUri?: string;
+}
+
+export interface WalletBalance {
+  native: string;
+  nativeFormatted: string;
+  tokens: TokenBalance[];
+  totalUsdValue?: string;
+}
+
+export interface MultiSigApproval {
+  transactionId: string;
+  approver: string;
+  approved: boolean;
+  timestamp: number;
+  signature?: string;
+}
+
+export interface PendingTransaction {
+  id: string;
+  transaction: TransactionRequest;
+  approvals: MultiSigApproval[];
+  approvalCount: number;
+  requiredApprovals: number;
+  canExecute: boolean;
+}
+
+export interface RelayerConfig {
+  id: string;
+  name: string;
+  apiUrl: string;
+  apiKey?: string;
+  enabled: boolean;
+}
+
+export interface GasEstimate {
+  gasLimit: string;
+  gasPrice?: string;
+  maxFeePerGas?: string;
+  maxPriorityFeePerGas?: string;
+  estimatedCost: string;
+  estimatedCostUsd?: string;
+}