Method finalizeTurn

internal/tui/model.go:879–905

finalizeTurn freezes the finished turn's wall-clock summary into the status bar (shown at idle until the next submit) and logs the totals. outcome is the finish glyph: ✓ clean, ✗ abort/stall. The bar's avg tok/s divides lastTokens by lastElapsed (wall-clock), so it stays self-verifying against the d

(outcome turnOutcome)

// owns the run summary, and the precise wall time lands in the turn_end log.
// Common to every wind-down (handleStreamClosed and abortTurn both call it).
func (m *Model) finalizeTurn(outcome turnOutcome) {
	if m.turnStart.IsZero() {
		return // defensive: finalizeTurn only runs inside a turn beginTurn started
	}
	// Commit the in-flight round's live estimate before measuring. On a clean
	// finish it's already 0 (applyDone folded the round into turnTokens at
	// EventDone). But a Ctrl+C or error mid-stream interrupts before EventDone,
	// so the cancelled round's tokens (often the whole generation) sit only in
	// streamingEstimate; without this they'd vanish from the avg and the session
	// total would drop backward. char/4 is the best count for a round that never
	// reported usage.
	m.turnTokens += m.streamingEstimate
	m.sessionTokens += m.streamingEstimate
	m.streamingEstimate = 0
	wall := time.Since(m.turnStart)
	m.lastElapsed = wall
	m.lastTokens = m.turnTokens
	m.lastOutcome = outcome
	avg := humanRate(m.turnTokens, wall)
	if avg != "" {
		avg = " · " + avg + " avg"
	}
	dbgWritef("turn_end", "%s · %s wall%s · session_total=%s",
		humanTokens(m.turnTokens), wall.Round(time.Millisecond), avg, humanTokens(m.sessionTokens))
	m.turnStart = time.Time{}
	m.turnTokens = 0
}

// handleStreamClosed drives what happens after one round's stream finishes:
// dispatch the next pending tool call, or, if none, finalize the turn and