diff --git a/VERSION b/VERSION
index 48b91fd8..8b95abd9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.24.1
+0.24.2
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 3304dd88..b050dcb3 100644
--- a/docs/CHANGELOG.md
+++ b/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
diff --git a/docs/version-history.md b/docs/version-history.md
index 83b26d9c..922dded0 100644
--- a/docs/version-history.md
+++ b/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
 
diff --git a/frontend/package.json b/frontend/package.json
index 6ae13209..95656b0d 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "planet-frontend",
-  "version": "0.24.1",
+  "version": "0.24.2",
   "private": true,
   "packageManager": "bun@1",
   "dependencies": {
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index a5a8c337..a99042dd 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,36 +1,48 @@
+import { Suspense, lazy } from 'react'
+import { Spin } from 'antd'
 import { Routes, Route, Navigate } from 'react-router-dom'
 import { useAuthStore } from './stores/auth'
 import Login from './pages/Login/Login'
-import Dashboard from './pages/Dashboard/Dashboard'
-import Users from './pages/Users/Users'
-import DataSources from './pages/DataSources/DataSources'
-import DataList from './pages/DataList/DataList'
-import Earth from './pages/Earth/Earth'
-import Settings from './pages/Settings/Settings'
-import BGP from './pages/BGP/BGP'
-import Playground from './pages/Playground/Playground'
+
+const Dashboard = lazy(() => import('./pages/Dashboard/Dashboard'))
+const Users = lazy(() => import('./pages/Users/Users'))
+const DataSources = lazy(() => import('./pages/DataSources/DataSources'))
+const DataList = lazy(() => import('./pages/DataList/DataList'))
+const Earth = lazy(() => import('./pages/Earth/Earth'))
+const Settings = lazy(() => import('./pages/Settings/Settings'))
+const BGP = lazy(() => import('./pages/BGP/BGP'))
+const Playground = lazy(() => import('./pages/Playground/Playground'))
 
 function App() {
   const { token } = useAuthStore()
-  const isEarthPage = window.location.pathname === '/earth'
+  const publicPaths = new Set(['/', '/earth'])
+  const isPublicRoute = publicPaths.has(window.location.pathname)
 
-  if (!token && !isEarthPage) {
+  if (!token && !isPublicRoute) {
     return <Login />
   }
 
   return (
-    <Routes>
-      <Route path="/admin" element={<Dashboard />} />
-      <Route path="/" element={<Navigate to="/earth" replace />} />
-      <Route path="/earth" element={<Earth />} />
-      <Route path="/users" element={<Users />} />
-      <Route path="/datasources" element={<DataSources />} />
-      <Route path="/data" element={<DataList />} />
-      <Route path="/bgp" element={<BGP />} />
-      <Route path="/playground" element={<Playground />} />
-      <Route path="/settings" element={<Settings />} />
-      <Route path="*" element={<Navigate to="/admin" replace />} />
-    </Routes>
+    <Suspense
+      fallback={(
+        <div className="app-route-loading">
+          <Spin size="large" />
+        </div>
+      )}
+    >
+      <Routes>
+        <Route path="/admin" element={<Dashboard />} />
+        <Route path="/" element={<Navigate to="/earth" replace />} />
+        <Route path="/earth" element={<Earth />} />
+        <Route path="/users" element={<Users />} />
+        <Route path="/datasources" element={<DataSources />} />
+        <Route path="/data" element={<DataList />} />
+        <Route path="/bgp" element={<BGP />} />
+        <Route path="/playground" element={<Playground />} />
+        <Route path="/settings" element={<Settings />} />
+        <Route path="*" element={<Navigate to="/admin" replace />} />
+      </Routes>
+    </Suspense>
   )
 }
 
diff --git a/frontend/src/index.css b/frontend/src/index.css
index efcce359..bb495c92 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -14,6 +14,13 @@ body {
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
 }
 
+.app-route-loading {
+  min-height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
 .login-container {
   min-height: 100vh;
   display: flex;
@@ -472,7 +479,7 @@ body {
 }
 
 .playground-help--expanded {
-  flex: 1 0 auto;
+  flex: 0 0 auto;
 }
 
 .playground-help.ant-collapse {
@@ -493,38 +500,21 @@ body {
 }
 
 .playground-help .ant-collapse-content {
-  flex: 1 1 auto;
+  flex: 0 0 auto;
   min-height: 0;
-  overflow: hidden;
+  overflow: visible;
 }
 
 .playground-help .ant-collapse-content-box {
-  height: 100%;
-  overflow: auto;
-  scrollbar-width: thin;
-  scrollbar-color: rgba(148, 163, 184, 0.88) transparent;
+  height: auto;
+  overflow: visible;
   padding: 12px 16px 16px !important;
 }
 
-.playground-help .ant-collapse-content-box::-webkit-scrollbar {
-  width: 8px;
-  height: 8px;
-}
-
-.playground-help .ant-collapse-content-box::-webkit-scrollbar-thumb {
-  background: rgba(148, 163, 184, 0.82);
-  border-radius: 999px;
-  border: 2px solid transparent;
-  background-clip: padding-box;
-}
-
-.playground-help .ant-collapse-content-box::-webkit-scrollbar-thumb:hover {
-  background: rgba(100, 116, 139, 0.9);
-  background-clip: padding-box;
-}
-
-.playground-help .ant-collapse-content-box::-webkit-scrollbar-track {
-  background: transparent;
+.playground-help__content {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
 }
 
 .playground-note.ant-alert {
diff --git a/frontend/src/pages/Playground/Playground.tsx b/frontend/src/pages/Playground/Playground.tsx
index 684b540e..38c22231 100644
--- a/frontend/src/pages/Playground/Playground.tsx
+++ b/frontend/src/pages/Playground/Playground.tsx
@@ -76,7 +76,6 @@ function Playground() {
       if (cached) {
         try {
           setProviderStatus(JSON.parse(cached) as AIProviderStatus)
-          return
         } catch {
           sessionStorage.removeItem(PLAYGROUND_PROVIDER_STATUS_STORAGE_KEY)
         }
@@ -207,22 +206,24 @@ function Playground() {
                     key: 'help',
                     label: '测试说明',
                     children: (
-                      <Alert
-                        type="info"
-                        showIcon
-                        className="playground-note"
-                        message="用于验证 AI Provider 是否可用，以及 backend -> aiprovider 链路是否通畅。"
-                        description={(
-                          <span>
-                            当前链路：
-                            <Text code>frontend /playground</Text>
-                            {' -> '}
-                            <Text code>backend /api/v1/ai/*</Text>
-                            {' -> '}
-                            <Text code>aiprovider /v1/*</Text>
-                          </span>
-                        )}
-                      />
+                      <div className="playground-help__content">
+                        <Alert
+                          type="info"
+                          showIcon
+                          className="playground-note"
+                          message="用于验证 AI Provider 是否可用，以及 backend -> aiprovider 链路是否通畅。"
+                          description={(
+                            <span>
+                              当前链路：
+                              <Text code>frontend /playground</Text>
+                              {' -> '}
+                              <Text code>backend /api/v1/ai/*</Text>
+                              {' -> '}
+                              <Text code>aiprovider /v1/*</Text>
+                            </span>
+                          )}
+                        />
+                      </div>
                     ),
                   },
                 ]}
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index b4323c34..2a61f691 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -72,4 +72,36 @@ export default defineConfig({
     entries: ['src/main.tsx'],
     exclude: ['satellite.js'],
   },
+  build: {
+    rollupOptions: {
+      output: {
+        manualChunks(id) {
+          if (!id.includes('node_modules')) {
+            return
+          }
+
+          if (id.includes('/@ant-design/icons/')) {
+            return 'icons-vendor'
+          }
+
+          if (
+            id.includes('/react/') ||
+            id.includes('/react-dom/') ||
+            id.includes('/react-router-dom/') ||
+            id.includes('/scheduler/')
+          ) {
+            return 'react-vendor'
+          }
+
+          if (id.includes('/axios/')) {
+            return 'network-vendor'
+          }
+
+          if (id.includes('/three/') || id.includes('/simplex-noise/') || id.includes('/satellite.js/')) {
+            return 'earth-vendor'
+          }
+        },
+      },
+    },
+  },
 })
diff --git a/pyproject.toml b/pyproject.toml
index 6141523c..94ce09c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "planet"
-version = "0.24.1"
+version = "0.24.2"
 description = "智能星球计划 - 态势感知系统"
 requires-python = ">=3.14"
 dependencies = [
diff --git a/uv.lock b/uv.lock
index da25f7ce..dc11f79c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -475,7 +475,7 @@ wheels = [
 
 [[package]]
 name = "planet"
-version = "0.24.1"
+version = "0.24.2"
 source = { virtual = "." }
 dependencies = [
     { name = "aiofiles" },