Fix multiple SDK issues

[Queenode]

Description

This Pull Request resolves 4 outstanding issues in the TrustFlow SDK:

• Closes Add "DOM" to tsconfig.json's lib array for browser-facing wallet/signing modules #119: Add "DOM" to tsconfig.json's lib array

  • Updated tsconfig.json to include "DOM" in compilerOptions.lib. This resolves the tsc --noEmit build failures caused by missing global window declarations in browser-facing wallet modules (Freighter, Albedo).

• Closes Wire up or remove the unused SDKLogger in src/utils/logger.ts #99: Wire up/remove unused SDKLogger

  • Replaced swallowed errors and bare console.error calls with the structured SDKLogger.
  • Implemented the logger inside src/escrow/monitor.ts and src/escrow/dispute.ts to improve structured observability.

• Closes Add unit tests for src/wallet/freighter.ts, albedo.ts and connect.ts #115: Add unit tests for wallet module

  • Implemented full test coverage in tests/wallet.test.ts.
  • Added tests to cover the retrieval of the Freighter and Albedo wallets with mocked global.window states.
  • Added test flows for success and failure conditions on wallet connections.

• Closes Add unit tests for src/contract/build.ts, invoke.ts, read.ts and simulate.ts #114: Add unit tests for contract module

  • Created tests/contract.test.ts to provide test coverage for the src/contract modules.
  • Tested the argument builders buildCreateEscrowArgs and buildReleaseArgs.
  • Mocked the @stellar/stellar-sdk modules (Address, Contract, TransactionBuilder, etc.) to securely test simulateContractCall, invokeContract, and readContractState flows.
  • Fixed a few TypeScript typing errors uncovered inside read.ts and simulate.ts using correct Transaction types.

Verification

• Compilation passes cleanly (npx tsc --noEmit).
• All Jest test suites pass.
• Coverage criteria have been achieved for the targeted contract/ and wallet/ directories.

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