Update Epic 3 status to done - all stories complete

- Updated epic-3 status from in-progress to done
- All stories in Epic 3 are now done:
  - 3-1-save-and-load-scene-presets: done
  - 3-2-scene-auto-apply-and-confirmationbar: done
  - 3-3-preset-import-and-export: done

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -35,7 +35,7 @@
 # - Dev moves story to 'review', then runs code-review (fresh context, different LLM recommended)
 
 generated: "2026-05-21T01:00:00+02:00"
-last_updated: "2026-05-24T19:00:00+02:00"
+last_updated: "2026-05-24T19:01:00+02:00"
 project: video-view-manager
 project_key: NOKEY
 tracking_system: file-system
@@ -60,7 +60,7 @@ development_status:
   epic-2-retrospective: done
 
   # Epic 3: Scene-Aware Camera Automation (Scene Presets)
-  epic-3: in-progress
+  epic-3: done
   3-1-save-and-load-scene-presets: done
   3-2-scene-auto-apply-and-confirmationbar: done
   3-3-preset-import-and-export: done