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/protocol/protocol.go

@@ -31,6 +31,7 @@ const (
 	TypeToolFailed       = "tool.failed"
 	TypeToolRejected     = "tool.rejected"
 	TypeApprovalRequired = "approval.required"
+	TypeApprovalResolved = "approval.resolved"
 	TypeStageManifest    = "stage.tool_manifest"
 	TypeProviderStatus   = "provider.status_changed"
 	TypeProtocolError    = "protocol_error"
@@ -69,6 +70,7 @@ type ServerMessage struct {
 	ProviderID  string  `json:"providerId"`
 	Preview     *string `json:"preview"`
 	Disposition string  `json:"disposition"`
+	Outcome     string  `json:"outcome"` // approval.resolved: APPROVED | REJECTED | AUTO_APPROVED
 
 	SteeringEmitted bool  `json:"steeringEmitted"`
 	OccurredAt      int64 `json:"occurredAt"`
@@ -178,7 +180,7 @@ func (m ServerMessage) IsEventBearing() bool {
 		TypeInferenceStarted, TypeInferenceDone, TypeInferenceTimeout,
 		TypeToolStarted, TypeToolCompleted, TypeToolFailed, TypeToolRejected,
 		TypeToolAssessed,
-		TypeApprovalRequired, TypeArtifactCreated:
+		TypeApprovalRequired, TypeApprovalResolved, TypeArtifactCreated:
 		return true
 	default:
 		return false