fix(cli): improve managed proxy lifecycle

[yushui2022]

Summary

• Add supervised retry loop for the ORGII managed CLI proxy
• Surface proxy startup/bind errors and recovery state in the CLI managed config UI
• Restore active ORGII Managed CLI configs to Default on explicit app exit
• Avoid overwriting externally modified CLI config files during shutdown restore
• Add lifecycle guidance copy for managed proxy mode

Verification

• Husky pre-commit
  • lint-staged
  • TypeScript check
  • cargo clippy scoped to agent_cli, org2
• Desktop build on Windows with CARGO_TARGET_DIR=D:\ORG2-cargo-target\cli-managed-config-adapters
• Launched D:\ORG2-cargo-target\cli-managed-config-adapters\dev-build\org2.exe and confirmed process responding

Notes

• Forced termination, crash, or power loss cannot run shutdown restoration; a persistent service or startup recovery flow would be needed to fully cover that case.