feat: add miner event log tab

internal/tui/messages.go

@@ -27,6 +27,7 @@ type StreamerUpdate struct {
 	Viewer *twitch.Viewer
 	Entry  *twitch.StreamerEntry
 	IRC    *IRCUpdate
+	Miner  *MinerUpdate
 	Index  int
 	Err    error
 	Done   bool
@@ -39,6 +40,12 @@ type IRCUpdate struct {
 	Line  string
 }
 
+// MinerUpdate carries one miner log line into the TUI.
+type MinerUpdate struct {
+	Login string
+	Line  string
+}
+
 type authStartedMsg struct {
 	Updates <-chan AuthUpdate
 }