big feat: new sidebar tab "Connections"

- TBD, but generally should list potential human connections to specific jobs

The issue mentions adding a new sidebar tab called 'Connections' to list potential human connections for jobs. Start by examining the frontend codebase for sidebar components and navigation structure. Look for existing tabs to understand the pattern. Determine what data source or API will provide the connections information. 'Done' means the tab is visible in the UI and can display relevant data, but the scope and implementation details are undefined.

索引モデルが issue の本文から書いたものです。