feat(tui-go): drop inline tool-start rows (keep results only)

The ⏵ tool-start row doubled up with the ✓/✎ result row in OUTPUT. Drop it
inline — tool starts still show in the tool list + EVENTS panel. The inline
transcript now carries only outcomes: ✎ writes, ✓/✗ tool results, ⌘/✕
approvals, ⊞/⊟ grants.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/tui-go/internal/app/server.go

@@ -198,7 +198,8 @@ func (m *Model) applyServer(msg protocol.ServerMessage) {
 			}
 			s.LastEventAt = nowMillis()
 		}
-		m.appendAction(msg.SessionID, "⏵", msg.ToolName)
+		// Tool-start is not surfaced inline (it doubles up with the ✓/✎ result row); it
+		// stays in the tool list + EVENTS panel.
 	case protocol.TypeToolCompleted:
 		if s := m.session(msg.SessionID); s != nil {
 			s.Active = false