Changelog

0.2.2

Bump the default Visuals.ExpiryWarningSeconds window from 2 → 3.5 s so the orange→red hue ramp gives the wearer a more useful heads-up before the shield drops. Existing configs still honour their saved value; delete the line under [Visuals] to pick up the new default.

Fix shielded players getting stuck wading from sand into shallow water. The 0.2.0 sand-fix bailed on every vanilla-found ground; now it only bails when that ground is at or above the water surface, and re-enables synthetic water-walk when vanilla snapped to a submerged sand floor.
Fix the expiry hue ramp not actually showing on the bubble shield. The shield visual is a ParticleSystemRenderer, which ignores MaterialPropertyBlock color overrides; now sets ParticleSystem.MainModule.startColor directly and restores the original on reset.

Fix shielded players getting stuck in sand (and occasionally other terrain) when exiting a water hazard. The synthetic-ground postfix now leaves real terrain alone whenever the vanilla ground check already found a contact, so shore terrain isn't replaced by our NotTerrain water proxy.
Add an expiry warning hue: the local player's bubble shield ramps from its base color through orange and into red over the configured trailing window (default 2 s) so the wearer gets a visual countdown before the shield drops. Configurable under Visuals.
Silence per-frame water-walk decision logs by default. Flip Diagnostics.VerboseLogging to true to bring them back when reporting an issue.

Refine water-surface walking so shielded players consistently rise to and walk on the water surface.
Add targeted debug logging for shield and water-surface decisions.
Replace the package icon with the final cover art.