[nightshift] code-quality: error wrapping, godoc, swallowed error fix

[nightshift-micr]

Automated by Nightshift v3 (GLM 5.1).

Task: code-quality
Category: pr
Changes:

• Error wrapping: 17+ bare error returns wrapped with fmt.Errorf context in workflow.go and cli.go
• Fixed swallowed json.Unmarshal error in cleanupRecord (now logs parse errors)
• Fixed context.WithTimeout defer placement for proper resource management
• Standardized CLI error output from fmt.Fprintln to fmt.Fprintf
• Added godoc comments to 20+ exported types and functions across app/crypto/gui packages
• Replaced static fmt.Errorf with errors.New for non-formatted messages

Merge if useful, close if not.

[Microck]

Closing in favor of #43 and existing mainline fixes. This PR is broad generated churn, stale, and previously had failing checks.