tui fixes

cmd/sidekick-tui/main.go

@@ -90,6 +90,22 @@ func (m model) userMessages() []string {
   return msgs
 }
 
+func filterHistory(h []sidekick.Message) []sidekick.Message {
+  var history []sidekick.Message
+  for _, msg := range h {
+    if msg.Role == sidekick.MessageRoleSystem {
+      // Filter out TUI-specific system messages that are for display only
+      if strings.HasPrefix(msg.Content, banner) ||
+        msg.Content == "Request cancelled." ||
+        strings.HasPrefix(msg.Content, "Error: ") {
+        continue
+      }
+    }
+    history = append(history, msg)
+  }
+  return history
+}
+
 type agentResponseMsg struct {
   response string
   err      error
@@ -493,7 +509,7 @@ func (m *model) runAgent() tea.Cmd {
   var ctx context.Context
   ctx, m.cancel = context.WithCancel(context.Background())
   return func() tea.Msg {
-    res, err := m.agent.Run(ctx, m.history, m.pool)
+    res, err := m.agent.Run(ctx, filterHistory(m.history), m.pool)
     return agentResponseMsg{response: res, err: err}
   }
 }