feat(app): add weekly recap cards with swipeable story UI and export

Introduce a Spotify-Wrapped-style recap feature: five themed cards
  (Cover, Path, Vibe, Workflow, Closing) rendered per archetype palette,
  with keyboard/swipe navigation and image export via capture IPC. Add
  RecapList, RecapDetail, RecapExport views and recap component library.
  Wire recap:list/read/updated IPC channels through preload, document the
  retrieval-to-card contract in references/recap-patterns.md, and bundle
  dist-renderer for production use.

.gitignore

@@ -3,3 +3,4 @@ plans/
 .skillopt-backups
 tests/
 node_modules/
+dist-renderer/