iOS 2026.04.7

Joining a challenge now updates the rest of the app right away, and this release fixes several challenge, map, and layout polish issues.

Fixed

Joining a challenge now immediately updates home challenge cards to "Participating" and fills in the "Participating Since" date on the challenge Details screen, instead of waiting for the next refresh.
The "{count} Participants" button on active challenges is tappable again when the leaderboard count can't load.
Multi-digit badge counts on the challenge To-Do tab (like "X10") stay on one line.
Location and point-of-interest pills line up correctly when no type icon is available.
The Organization screen no longer shows a tall empty space between the bulletin board and the preview map.
The selected map button fills the whole button with its highlight color instead of only an inset circle.
Challenge photo submissions now record both the location and the location type, so backend rules resolve correctly.
Tapping Join Challenge while signed out now shows a clear prompt to log in instead of quietly failing.
Fixed a rare social feed crash that could happen while offline posts were being reconciled in the background.