Refactor: Reorganize code into modular command and utility structure

[wirwolf]

Summary

This PR refactors the codebase to improve modularity and maintainability by breaking down monolithic classes into focused, single-responsibility modules organized by feature and concern.

Key Changes

Structural Reorganization

• Removed monolithic classes: Deleted Logic.ts and Helpers.ts which contained mixed concerns
• Created command modules: Extracted command handlers into dedicated files:
  • src/commands/download.ts - Secret download functionality
  • src/commands/checkDiff.ts - Diff checking functionality
  • src/commands/apply.ts - Change application functionality
  • src/commands/common.ts - Shared command utilities

Utility Extraction

• Created utility modules for better code organization:
  • src/utils/diff.ts - Deep diff mapping logic (moved from Helpers.ts)
  • src/utils/file.ts - JSON file I/O operations (moved from Helpers.ts)
  • src/utils/process.ts - Child process execution utilities (moved from Helpers.ts)

Service Refactoring

• Renamed VaultUtility to VaultService for clarity and consistency
• Updated imports in VaultService.ts to use new utility functions instead of Helpers class methods

Entry Point Updates

• Updated src/App.ts to import command functions directly instead of using Logic class methods
• Removed .bind(this) calls as functions are now standalone exports rather than class methods

Benefits

• Improved testability: Smaller, focused modules are easier to unit test
• Better code organization: Clear separation of concerns with dedicated directories for commands and utilities
• Reduced coupling: Removed dependency on monolithic helper classes
• Enhanced maintainability: Easier to locate and modify specific functionality

https://claude.ai/code/session_01KWCApFXhxZ6HqyYy9zoDUE