hermes - 💡(How to fix) Fix Roadmap: make the TUI the flagship Hermes experience

Summary

Make the Ink TUI the flagship Hermes experience by adding richer live operational views around tool activity, approvals, sessions, and task progress.

Proposed scope

• Add a live tool timeline with collapsible calls, stdout previews, errors, and retry affordances.
• Add a session minimap showing messages, tool calls, checkpoints, files touched, cost, and elapsed time.
• Improve inline approval prompts so common approvals are fast and keyboard-native.
• Add first-class views or commands for /diff, /tests, /plan, /handoff, and /checkpoint.
• Explore a run replay or "flight recorder" mode for debugging completed agent sessions.

Acceptance criteria

• TUI users can inspect recent tool calls without leaving the terminal UI.
• Long-running sessions expose meaningful progress and history at a glance.
• New UI state is surfaced through the existing TUI/gateway architecture, not a parallel React chat implementation.