fix: polish earth toolbar controls and loading copy

docs/CHANGELOG.md

@@ -47,6 +47,27 @@ 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.
 
+## 0.21.1
+
+Released: 2026-03-26
+
+### Highlights
+
+- Refined the Earth big-screen toolbar with clearer controls, hover hints, and more consistent visual language.
+- Replaced emoji-based Earth toolbar controls with SVG icons for a cleaner HUD.
+- Updated the Earth loading splash so manual reloads no longer show legacy wording.
+
+### Improved
+
+- Improved zoom controls by adding tooltips for reset view, zoom in, zoom out, and resetting zoom to `100%`.
+- Improved Earth toolbar readability with larger icons and revised glyphs for rotation, reload, satellites, trails, cables, terrain, and collapse.
+- Improved loading overlay copy to better distinguish initial initialization from manual refresh.
+
+### Fixed
+
+- Fixed rotate toggle rendering so play/pause state no longer relies on emoji text replacement.
+- Fixed Earth autorotation target syncing so inertial drag is preserved while the globe is still coasting.
+
 ## 0.21.0
 
 Released: 2026-03-26

docs/version-history.md

@@ -16,7 +16,7 @@
 ## Current Version
 
 - `main` 当前主线历史推导到：`0.16.5`
-- `dev` 当前开发分支历史推导到：`0.21.0`
+- `dev` 当前开发分支历史推导到：`0.21.1`
 
 ## Timeline
 
@@ -63,6 +63,7 @@
 | `0.19.0` | feature | `dev` | `020c1d50` | refine data management and collection workflows |
 | `0.20.0` | feature | `dev` | `ce5feba3` | stabilize Earth module and fix satellite TLE handling |
 | `0.21.0` | feature | `dev` | `pending` | add Earth inertial drag, sync hover/trail state, and support unlimited satellite loading |
+| `0.21.1` | bugfix | `dev` | `pending` | polish Earth toolbar controls, icons, and loading copy |
 
 ## Maintenance Commits Not Counted as Version Bumps