Enhance Earth interaction and bump version to 0.21.0

docs/CHANGELOG.md

@@ -47,6 +47,32 @@ Released: 2026-03-26
 - Older satellite records can still fall back to backend-generated TLE lines when raw lines are unavailable.
 - This release is primarily focused on Earth module stability rather than visible admin UI changes.
 
+## 0.21.0
+
+Released: 2026-03-26
+
+### Highlights
+
+- Added legacy-inspired inertial drag behavior to the Earth big-screen module.
+- Removed the hard 10,000-satellite ceiling when Earth satellite loading is configured as unlimited.
+- Tightened Earth toolbar and hover-state synchronization for a more consistent runtime feel.
+
+### Added
+
+- Added inertial drag state and smoothing to the Earth runtime so drag release now decays naturally.
+
+### Improved
+
+- Improved drag handling so moving the pointer outside the canvas no longer prematurely stops rotation.
+- Improved satellite loading to support dynamic frontend buffer sizing when no explicit limit is set.
+- Improved Earth interaction fidelity by keeping the hover ring synchronized with moving satellites.
+
+### Fixed
+
+- Fixed the trails toolbar button so its default visual state matches the actual default runtime state.
+- Fixed the satellite GeoJSON endpoint so omitting `limit` no longer silently falls back to `10000`.
+- Fixed hover ring lag where the ring could stay behind the satellite until the next mouse move.
+
 ## 0.19.0
 
 Released: 2026-03-25