fix(tui): scroll to bottom on submit, space above busy indicator

internal/tui/coverage_test.go

@@ -98,13 +98,17 @@ func TestStatusLinePlacement(t *testing.T) {
 	if marker < 0 || thinking < marker {
 		t.Error("status line must render below the last user message")
 	}
+	if !strings.HasPrefix(m.statusLine(), "\n") {
+		t.Error("status line must lead with a blank separator row")
+	}
 	if strings.Contains(plain(m.header()), "thinking") {
 		t.Error("header must not carry the busy indicator anymore")
 	}
 
-	// The row claims exactly one line of layout; idle releases it, and a
-	// pending approval (which owns the input area) never shows it.
-	if got, want := m.inputAreaHeight(), inputHeight+1; got != want {
+	// The indicator claims two rows of layout — a blank separator above it,
+	// then the status row itself; idle releases both, and a pending approval
+	// (which owns the input area) never shows it.
+	if got, want := m.inputAreaHeight(), inputHeight+2; got != want {
 		t.Errorf("busy inputAreaHeight = %d, want %d", got, want)
 	}
 	m.busy = false

internal/tui/input.go

@@ -112,6 +112,7 @@ func (m *Model) submit() tea.Cmd {
 		m.ta.Reset()
 		m.closeAC()
 		m.refresh()
+		m.vp.GotoBottom() // Enter means "show me the latest", even mid-turn
 		return nil
 	}
 	m.ta.Reset()
@@ -136,6 +137,10 @@ func (m *Model) sendPrompt(text string) tea.Cmd {
 	}
 	m.relayout() // the busy status line claims a row above the input
 	m.refresh()
+	// Submitting is an explicit "show me the latest" signal — jump to the
+	// bottom even when the reader was up in the scrollback (refresh alone
+	// only sticks when already at the bottom).
+	m.vp.GotoBottom()
 
 	thinking := ""
 	if m.thinkOn {

internal/tui/model.go

@@ -579,7 +579,7 @@ func (m *Model) inputAreaHeight() int {
 	}
 	h := inputHeight
 	if m.statusLineVisible() {
-		h++ // busy status line above the input box
+		h += 2 // busy status line + blank separator row above the input box
 	}
 	if m.ac.open {
 		h += m.ac.height()

internal/tui/promptflow_test.go

@@ -185,6 +185,34 @@ func TestQueuedPromptSendsOnDone(t *testing.T) {
 	}
 }
 
+// TestSubmitJumpsToBottom verifies ⏎ always returns the viewport to the
+// latest output — both for a fresh prompt and when queueing mid-turn — even
+// when the reader was up in the scrollback.
+func TestSubmitJumpsToBottom(t *testing.T) {
+	m := newTestModel()
+	m.ta.Focus()
+	tallTranscript(m)
+
+	// Queueing mid-turn: busy model, scrolled up, ⏎.
+	busyTurn(m)
+	m.vp.GotoTop()
+	m.ta.SetValue("follow up")
+	m.submit()
+	if !m.vp.AtBottom() {
+		t.Error("queueing a prompt should jump to the latest output")
+	}
+
+	// Fresh submit once the turn ended (the returned send cmd is deliberately
+	// not executed — newTestModel has no client).
+	m.busy = false
+	m.vp.GotoTop()
+	m.ta.SetValue("next prompt")
+	m.submit()
+	if !m.vp.AtBottom() {
+		t.Error("submitting a prompt should jump to the latest output")
+	}
+}
+
 // tallTranscript loads a scrollable assistant message into the transcript.
 // (A markdown list survives glamour as one rendered line per item; a plain
 // "x\n" repeat would collapse into a single wrapped paragraph.)

internal/tui/view.go

@@ -221,7 +221,9 @@ func (m *Model) statusLine() string {
 	if e := m.elapsed(); e != "" {
 		el = th.headerMeta.Render(" · " + e)
 	}
-	return th.spinner.Render(m.sp.View()) + " " + th.statusBusy.Render(label) + el
+	// A blank row above separates the indicator from the transcript tail —
+	// inputAreaHeight accounts for it so the layout math stays exact.
+	return "\n" + th.spinner.Render(m.sp.View()) + " " + th.statusBusy.Render(label) + el
 }
 
 // statusLineVisible reports whether the status line occupies a row, keeping