fix: polish playground routing and bundle splits

docs/CHANGELOG.md

@@ -7,6 +7,26 @@ This project follows the repository versioning rule:
 - `feature` -> `+0.1.0`
 - `bugfix` -> `+0.0.1`
 
+## 0.24.2
+
+Released: 2026-04-09
+
+### Highlights
+
+- Fixed the public-entry and AI diagnostics regressions introduced during the recent frontend routing and playground work, while also reducing the main frontend bundle by switching to route-level lazy loading and more targeted vendor chunking.
+
+### Improved
+
+- Improved [frontend/src/App.tsx](/home/ray/dev/linkong/planet/frontend/src/App.tsx) by lazy-loading admin pages and large workspaces through `React.lazy()` plus `Suspense`, so the initial frontend entry no longer pulls every route into the first bundle.
+- Improved [frontend/vite.config.ts](/home/ray/dev/linkong/planet/frontend/vite.config.ts) by adding targeted manual chunking for React, icon, network, and Earth-related vendor dependencies instead of leaving everything in one monolithic application bundle.
+- Improved [frontend/src/index.css](/home/ray/dev/linkong/planet/frontend/src/index.css) by adding a shared route-loading state and making the Playground help panel size to its content instead of stretching to fill the sidebar.
+
+### Fixed
+
+- Fixed [frontend/src/App.tsx](/home/ray/dev/linkong/planet/frontend/src/App.tsx) so anonymous visits to `/` once again reach the public Earth entry through the existing `/ -> /earth` redirect instead of being intercepted by the login screen.
+- Fixed [frontend/src/pages/Playground/Playground.tsx](/home/ray/dev/linkong/planet/frontend/src/pages/Playground/Playground.tsx) so cached provider status is shown immediately but still refreshed from the backend, avoiding stale diagnostics after `.env` or provider changes within the same browser tab.
+- Fixed [frontend/src/pages/Playground/Playground.tsx](/home/ray/dev/linkong/planet/frontend/src/pages/Playground/Playground.tsx) and [frontend/src/index.css](/home/ray/dev/linkong/planet/frontend/src/index.css) so the `测试说明` card no longer over-expands and now fits its content more naturally in the sidebar.
+
 ## 0.24.1
 
 Released: 2026-04-09

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：`0.24.1`
+- `dev` 当前开发分支历史推导到：`0.24.2`
 
 ## Timeline
 
@@ -74,6 +74,7 @@
 | `0.23.3` | bugfix | `dev` | `pending` | refine `planet.sh` zsh runtime compatibility, startup logging, and frontend readiness feedback |
 | `0.24.0` | feature | `dev` | `pending` | add AI Playground entry, provider diagnostics, and frontend layout guidance |
 | `0.24.1` | bugfix | `dev` | `pending` | refactor Earth HUD into class-first CSS layers, unify Bun-only frontend tooling guidance, and auto-bootstrap Bun/uv in `planet.sh` |
+| `0.24.2` | bugfix | `dev` | `pending` | restore public Earth entry, refresh Playground provider diagnostics correctly, fit help-card content, and split frontend bundles by route/vendor |
 
 ## Maintenance Commits Not Counted as Version Bumps