phase 8

ui/detection-app/src/composables/useCheckpointLoader.ts

@@ -66,11 +66,13 @@ export function useCheckpointLoader(
     currentFrameRef.value = frame.seq
   }
 
-  const { checkpointStageFor } = useStageRegistry()
+  const { stages, checkpointStageFor } = useStageRegistry()
 
-  // Auto-load checkpoint when entering editor mode
+  // Auto-load checkpoint when entering editor mode.
+  // Also watches stages — the registry fetch is async, so on first load
+  // stages may be empty. When they arrive, re-evaluate.
   watch(
-    () => [pipeline.layoutMode, pipeline.editorStage, jobId.value] as const,
+    () => [pipeline.layoutMode, pipeline.editorStage, jobId.value, stages.value.length] as const,
     ([mode, stage, job]) => {
       if (mode === 'bbox_editor' && stage && job) {
         const cpStage = checkpointStageFor(stage)