feat(feed): show the end a Genshin article states

Genshin and Miliastra rows take the end their own wiki article states, because
the table's date can mean 03:59, 14:59, 17:59 or one instant worldwide. Rows with
no usable time stay on the daily-reset reading.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/PRD.md

@@ -663,6 +663,9 @@ The app's entire value is that the dates are right. Therefore:
   reading retires an event up to nine hours before the game does and the reader is standing in the
   game while we say it. This is a reading of the date the source printed, not a time invented for
   it, and the detail sheet says as much.
+- **A time the source does state is used.** Genshin and Miliastra rows take the end their own wiki
+  article states, because the same printed date can mean three different times. A row whose article
+  states none, or a different date, stays on the reading above.
 
 An empty calendar is a recoverable disappointment. A confidently wrong end date is the failure this
 product exists to prevent.