storage.ts is a large, tightly coupled file that mixes core logic with directvscode usage, making it hard to test. Split it into small, focused modules and add unit tests for the core logic using a thinvscode adapter/mocks.

Proposal

• Extractcore storage logic (try to removevscode imports or simply mock them in tests).
• Introduce simple interfaces (e.g.,BinaryManager,CliConfigManager,MementoManager,SecretsManager).
• Write unit tests for core; adapter tests can use a minimal mock.