Dexter 2026.4.8

Changes

• Add hint bar with / slash-command matching and Escape key behavior
• Improve hint bar styling
• Improve CLI rendering and cut flicker by trimming root re-renders and updating tool/working UI more efficiently
• Centralize slash commands and matching for autocomplete (model, rules, clear, memory, heartbeat, history, help)
• Add optional name filter on insider trades lookups

Fixes

• Fix over-eager scheduled (cron) job messages on the gateway heartbeat path
• Fix gateway heartbeat suppression behavior