fix(launches): hand the camera over before stopping, and only blame a fresh index error

- releaseCameraOwnership marks the camera released before stopping, so a
  flight navigation asked to preserve survives; exit also releases it, so an
  inactive layer never cancels another owner's flight.
- The failure toast names the mission index only when its error is from the
  current Context attempt (stats.errorAt), not an earlier one.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/layers/launches/controls.js

@@ -14,10 +14,10 @@ export function createControls({ state: layerState, services, parts, source }) {
     releaseCameraOwnership() {
       // Navigation takes the camera; a failed entry must not restore the old view.
       layerState._entryCameraView = null;
+      layerState._cameraReleased = true;
       parts.panel.clearMissionRosterHover();
       parts.replay.stopMissionReplay();
       parts.selection.stopMissionZoomAnchor();
-      layerState._cameraReleased = true;
     },
 
     /**
@@ -60,6 +60,7 @@ export function createControls({ state: layerState, services, parts, source }) {
         orbitMatches: layerState._orbitMatches,
         lastUpdate: layerState._lastUpdate,
         error: layerState._lastError,
+        errorAt: layerState._lastErrorAt,
         stale: layerState._stale,
       };
     },