Module fix 

Fix layer — applies auto-fixable suggestions by editing Cargo.toml using toml_edit to preserve comments and formatting.

Safety guardrails:

• .bak backup before any writes
• --dry-run previews the diff without touching files
• Only direct dependency edits (never transitive)
• Only auto-fixable suggestion types (StdReplacement, Unmaintained, FeatureOptimization)

Structs

FixResult

Result summary of a fix operation.

Functions

apply

Apply auto-fixable suggestions to the Cargo.toml at manifest_path.