tui: fix task status to show current tool state from message store

AGENTS.md

@@ -12,6 +12,7 @@
 - Prefer single word variable names where possible
 - Use Bun APIs when possible, like `Bun.file()`
 - Rely on type inference when possible; avoid explicit type annotations or interfaces unless necessary for exports or clarity
+- Prefer functional array methods (flatMap, filter, map) over for loops; use type guards on filter to maintain type inference downstream
 
 ### Avoid let statements