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/server.go

@@ -177,6 +177,16 @@ func (m *Model) applyServer(msg protocol.ServerMessage) {
 		}
 	case protocol.TypeApprovalRequired:
 		m.onApprovalRequired(msg)
+	case protocol.TypeApprovalResolved:
+		if s := m.session(msg.SessionID); s != nil {
+			s.Pending = nil
+			detail := msg.Outcome
+			if msg.Reason != "" {
+				detail += " — " + msg.Reason
+			}
+			s.addEvent(msg.OccurredAt, "ApprovalResolved", detail)
+			s.LastEventAt = nowMillis()
+		}
 	case protocol.TypeSessionSnapshot:
 		m.onSnapshot(msg)
 	case protocol.TypeStageManifest:
@@ -335,10 +345,15 @@ func (m *Model) touch(id, status string) {
 
 // --- Session helpers ---
 
+// maxSessionEvents bounds retained per-session history (effectively "all" for a
+// session, while keeping memory bounded on very long runs). The EVENTS panel
+// shows the tail that fits; the `e` inspector scrolls the full retained list.
+const maxSessionEvents = 1000
+
 func (s *Session) addEvent(epochMillis int64, typ, detail string) {
 	s.Events = append(s.Events, EventEntry{formatTime(epochMillis), typ, detail})
-	if len(s.Events) > 7 {
-		s.Events = s.Events[len(s.Events)-7:]
+	if len(s.Events) > maxSessionEvents {
+		s.Events = s.Events[len(s.Events)-maxSessionEvents:]
 	}
 	s.LastEventAt = epochMillis
 }