Add genlocke list and detail pages

Add GET /genlockes and GET /genlockes/{id} endpoints with aggregate
encounter/death stats per leg, and a frontend list page at /genlockes
plus a detail page at /genlockes/:genlockeId showing progress timeline,
cumulative stats, configuration, retired families, and quick actions.
Update nav link to point to the list page instead of /genlockes/new.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/index.ts

@@ -1,3 +1,5 @@
+export { GenlockeDetail } from './GenlockeDetail'
+export { GenlockeList } from './GenlockeList'
 export { Home } from './Home'
 export { NewGenlocke } from './NewGenlocke'
 export { NewRun } from './NewRun'