chore(tci): log the transmit meters as they arrive, or fail to

The log shows 'tx_power;' going out four times a second during a tune and
nothing coming back — but that proves less than it looks: a reply that
arrived and failed to parse leaves exactly the same trace as one that
never came. Both are now visible.

internal/cat/tci_panel.go

@@ -111,7 +111,12 @@ func (t *TCI) handlePanel(name string, get func(int) string, args string) bool {
 	// it. What the radio actually announces after the command settles whether
 	// this is our reading or its doing, and no amount of reasoning will.
 	switch name {
-	case "mute", "sql_enable", "sql_level":
+	case "mute", "sql_enable", "sql_level", "tx_power", "tx_swr", "tune":
+		// Logged on arrival so an ANSWER can be told from a silence. The
+		// transmit meters are asked for four times a second while keyed and the
+		// log showed only the asking, which proves nothing on its own: a reply
+		// that arrived and failed to parse looks exactly like one that never
+		// came.
 		debugLog.Printf("TCI: %s:%s", name, args)
 	}
 	switch name {