Fix wind particles never appearing

Two bugs prevented wind particles from rendering:

1. Retrofit URL-encoded commas in the batch lat/lon query strings
   (%2C instead of ,), so Open-Meteo rejected every grid fetch silently.
   Fixed with encoded=true on the @Query annotations.

2. loadWindGrid() was only called from onCameraIdleListener, so particles
   never started unless the user manually panned. Added an eager trigger
   on the first GPS fix using the map's current visible region.

Also added a log warning when fetchWindGrid fails so future failures are
visible in logcat.

https://claude.ai/code/session_017TwkSjhzhmTcHKmVG5MWUa

0 files changed, 0 insertions, 0 deletions