- Move toast viewport from top-right to bottom-left with slide-up animation
- Apply consistent transparent blur-glass styling across all tone colors
- Include agent names (from query cache) in agent status, run status,
and activity toasts instead of truncated IDs
- Show specific change details for issue.updated toasts (status, priority)
- Use "New comment by AgentName" instead of generic "Issue comment added"
- Add truncation helper for long body text
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds ToastProvider/ToastViewport for in-app notifications with dedupe,
auto-dismiss, and action links. Wires success toasts to issue create,
issue update, and comment mutations. Adds live event toasts for activity,
agent status, and run status changes via LiveUpdatesProvider.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
