Feature Request: Buddy message persistence / logging

Problem

Buddy (companion) messages disappear too quickly from the terminal. By the time I notice the speech bubble, it's already gone — making it hard to read what the buddy said.

Current Behavior

• Buddy quips render in a speech bubble for a brief duration, then vanish
• Messages are not logged anywhere (not in session JSONL, not in ~/.buddy-companion/state.json)
• No hook event fires when buddy speaks
• No CLI flag or setting to control display duration

Requested Solutions (any of these would help)

1. Configurable display duration — a setting like buddy.messageDuration in settings.json
2. Buddy message log — persist messages to ~/.buddy-companion/history.json or similar
3. Hook event — a BuddyMessage hook that fires when buddy speaks, so users can build custom logging
4. Scrollback-friendly rendering — ensure buddy messages remain in terminal scrollback history even after the bubble disappears from the TUI

Context

• Buddy was just released (April 1, 2026) so this is early feedback
• The feature itself is delightful — just need a way to actually read the messages
• Existing issues (#41867, #41908, #41684) focus on customization/gamification but not message persistence