feat(tui): full event history, approval-decision events, status bar

- Events were hard-capped to the last 7 per session in addEvent, so the
  e-inspector and EVENTS panel could never show more. Raise to 1000
  (effectively all, bounded); the EVENTS panel now shows the latest that
  fit (tail), and the inspector scrolls a window around the selection
  with a position indicator.
- The TUI had no approval.resolved handling at all — the decision frame
  was ignored and pending only cleared on session.resumed. Add the
  constant + case: clear the gate and record an ApprovalResolved event
  (APPROVED/REJECTED/AUTO_APPROVED + reason) into the stream.
- Status bar now shows the current stage and session status alongside the
  name. Relabel the cryptic "N bg" badge to "N elsewhere".

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

@@ -227,9 +227,14 @@ func (m Model) eventInspectorModal() string {
 	evs := m.currentEvents()
 
 	var b strings.Builder
-	b.WriteString(m.titleLine("event inspector") + "\n\n")
+	b.WriteString(m.titleLine("event inspector"))
+	if len(evs) > 0 {
+		b.WriteString(mbg(t, "   ("+itoa(m.overlayEventIdx+1)+"/"+itoa(len(evs))+")", t.P.Faint))
+	}
+	b.WriteString("\n\n")
 	if len(evs) == 0 {
 		b.WriteString(mbg(t, "no events", t.P.Faint))
+		return m.center(t.Overlay.Width(w).Render(b.String()))
 	}
 	// Budget the plain detail so the styled row never needs ANSI-aware truncation
 	// (truncating a styled string would cut through escape codes and corrupt it).
@@ -237,7 +242,28 @@ func (m Model) eventInspectorModal() string {
 	if detailBudget < 4 {
 		detailBudget = 4
 	}
-	for i, e := range evs {
+	// Window the (potentially long) list to a visible height, keeping the
+	// selected row in view — the modal must not grow past the screen.
+	bodyH := m.height*70/100 - 4
+	if bodyH < 3 {
+		bodyH = 3
+	}
+	off := 0
+	if len(evs) > bodyH {
+		off = m.overlayEventIdx - bodyH/2
+		if off < 0 {
+			off = 0
+		}
+		if off > len(evs)-bodyH {
+			off = len(evs) - bodyH
+		}
+	}
+	end := off + bodyH
+	if end > len(evs) {
+		end = len(evs)
+	}
+	for i := off; i < end; i++ {
+		e := evs[i]
 		cat := inferCategory(e.Type)
 		marker := mbg(t, "  ", t.P.BgPanel)
 		fg := t.P.Fg