feat(tui): update system message for clarity and conciseness in tool usage instructions

apps/infrastructure/src/lib.rs

@@ -218,6 +218,8 @@ pub enum TurnEvent {
         agent_name: String,
         status: crate::AgentStatus,
     },
+    TodoUpdate(String),
+    PlanUpdate(String),
 }
 
 /// A tool call awaiting execution, along with which execution model