diff --git a/src/web/index.css b/src/web/index.css
index ebbc7ec..84f1093 100644
--- a/src/web/index.css
+++ b/src/web/index.css
@@ -2950,6 +2950,44 @@ textarea {
   margin-bottom: 16px;
 }
 
+.oauth-page-message-info {
+  border: 1px solid color-mix(in srgb, var(--color-primary) 18%, var(--color-border-light));
+  background: color-mix(in srgb, var(--color-primary) 6%, var(--color-bg-card));
+}
+
+.oauth-page-message-success {
+  border: 1px solid color-mix(in srgb, var(--color-success) 22%, var(--color-border-light));
+  background: color-mix(in srgb, var(--color-success) 8%, var(--color-bg-card));
+}
+
+.oauth-page-message-error {
+  border: 1px solid color-mix(in srgb, var(--color-danger) 22%, var(--color-border-light));
+  background: color-mix(in srgb, var(--color-danger) 7%, var(--color-bg-card));
+}
+
+.oauth-page-message-head {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 10px;
+  flex-wrap: wrap;
+}
+
+.oauth-page-message-meta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+  margin-top: 10px;
+}
+
+.oauth-page-message-detail {
+  width: 100%;
+  font-size: 12px;
+  line-height: 1.6;
+  color: var(--color-text-secondary);
+}
+
 .oauth-workbench-card {
   padding: 16px;
 }
diff --git a/src/web/pages/OAuthManagement.test.tsx b/src/web/pages/OAuthManagement.test.tsx
index ef19cb1..f890107 100644
--- a/src/web/pages/OAuthManagement.test.tsx
+++ b/src/web/pages/OAuthManagement.test.tsx
@@ -571,6 +571,11 @@ describe('OAuthManagement page', () => {
         strategy: 'round_robin',
       });
       expect(apiMock.getOAuthConnections).toHaveBeenCalledTimes(2);
+      expect(collectText(root.root)).toContain('已创建路由池');
+      expect(collectText(root.root)).toContain('Codex Pool');
+      expect(collectText(root.root)).toContain('2 个成员');
+      expect(collectText(root.root)).toContain('轮询');
+      expect(collectText(root.root)).toContain('已将选中的 OAuth 账号合并为一个路由池，后续会以单个路由单元参与路由。');
       expect(collectText(root.root)).toContain('路由池：Codex Pool · 2 个成员 · 轮询');
     } finally {
       root?.unmount();
@@ -727,6 +732,227 @@ describe('OAuthManagement page', () => {
     }
   });
 
+  it('keeps created route unit feedback when the connection list refresh fails', async () => {
+    apiMock.getOAuthProviders.mockResolvedValue({
+      providers: [
+        {
+          provider: 'codex',
+          label: 'Codex',
+          platform: 'codex',
+          enabled: true,
+          loginType: 'oauth',
+          requiresProjectId: false,
+          supportsDirectAccountRouting: true,
+          supportsCloudValidation: true,
+          supportsNativeProxy: true,
+        },
+      ],
+    });
+    apiMock.getOAuthConnections
+      .mockResolvedValueOnce({
+        items: [
+          {
+            accountId: 51,
+            siteId: 8,
+            provider: 'codex',
+            email: 'pool-a@example.com',
+            planType: 'team',
+            modelCount: 2,
+            modelsPreview: ['gpt-5.4'],
+            status: 'healthy',
+            routeParticipation: { kind: 'single' },
+            site: {
+              id: 8,
+              name: 'ChatGPT Codex OAuth',
+              url: 'https://chatgpt.com/backend-api/codex',
+              platform: 'codex',
+            },
+          },
+          {
+            accountId: 52,
+            siteId: 8,
+            provider: 'codex',
+            email: 'pool-b@example.com',
+            planType: 'team',
+            modelCount: 2,
+            modelsPreview: ['gpt-5.4'],
+            status: 'healthy',
+            routeParticipation: { kind: 'single' },
+            site: {
+              id: 8,
+              name: 'ChatGPT Codex OAuth',
+              url: 'https://chatgpt.com/backend-api/codex',
+              platform: 'codex',
+            },
+          },
+        ],
+        total: 2,
+        limit: 100,
+        offset: 0,
+      })
+      .mockRejectedValueOnce(new Error('列表刷新失败'));
+    apiMock.createOAuthRouteUnit.mockResolvedValue({ success: true });
+
+    let root!: WebTestRenderer;
+    try {
+      await act(async () => {
+        root = create(
+          <ToastProvider>
+            <MemoryRouter>
+              <OAuthManagement />
+            </MemoryRouter>
+          </ToastProvider>,
+        );
+      });
+      await flushMicrotasks();
+
+      const selectAll = root.root.find((node) => (
+        node.type === 'input'
+        && node.props.type === 'checkbox'
+        && node.props['data-testid'] === 'oauth-select-all'
+      ));
+
+      await act(async () => {
+        selectAll.props.onChange({ target: { checked: true } });
+      });
+
+      await clickButton(root, '合并参与路由');
+
+      const nameInput = root.root.find((node) => (
+        node.type === 'input'
+        && node.props['data-testid'] === 'oauth-route-unit-name'
+      ));
+      await act(async () => {
+        nameInput.props.onChange({ target: { value: 'Fallback Pool' } });
+      });
+
+      await clickButton(root, '创建路由池');
+
+      expect(apiMock.createOAuthRouteUnit).toHaveBeenCalledWith({
+        accountIds: [51, 52],
+        name: 'Fallback Pool',
+        strategy: 'round_robin',
+      });
+      expect(apiMock.getOAuthConnections).toHaveBeenCalledTimes(2);
+      expect(collectText(root.root)).toContain('已创建路由池，但连接列表刷新失败');
+      expect(collectText(root.root)).toContain('Fallback Pool');
+      expect(collectText(root.root)).toContain('2 个成员');
+      expect(collectText(root.root)).toContain('轮询');
+      expect(collectText(root.root)).not.toContain('已选 2 项');
+    } finally {
+      root?.unmount();
+    }
+  });
+
+  it('keeps split feedback when the connection list refresh fails', async () => {
+    apiMock.getOAuthProviders.mockResolvedValue({
+      providers: [
+        {
+          provider: 'codex',
+          label: 'Codex',
+          platform: 'codex',
+          enabled: true,
+          loginType: 'oauth',
+          requiresProjectId: false,
+          supportsDirectAccountRouting: true,
+          supportsCloudValidation: true,
+          supportsNativeProxy: true,
+        },
+      ],
+    });
+    apiMock.getOAuthConnections
+      .mockResolvedValueOnce({
+        items: [
+          {
+            accountId: 61,
+            siteId: 8,
+            provider: 'codex',
+            email: 'split-a@example.com',
+            planType: 'team',
+            modelCount: 2,
+            modelsPreview: ['gpt-5.4'],
+            status: 'healthy',
+            routeParticipation: {
+              kind: 'route_unit',
+              routeUnitId: 96,
+              name: 'Sticky Pool',
+              strategy: 'stick_until_unavailable',
+              memberCount: 2,
+            },
+            site: {
+              id: 8,
+              name: 'ChatGPT Codex OAuth',
+              url: 'https://chatgpt.com/backend-api/codex',
+              platform: 'codex',
+            },
+          },
+          {
+            accountId: 62,
+            siteId: 8,
+            provider: 'codex',
+            email: 'split-b@example.com',
+            planType: 'team',
+            modelCount: 2,
+            modelsPreview: ['gpt-5.4'],
+            status: 'healthy',
+            routeParticipation: {
+              kind: 'route_unit',
+              routeUnitId: 96,
+              name: 'Sticky Pool',
+              strategy: 'stick_until_unavailable',
+              memberCount: 2,
+            },
+            site: {
+              id: 8,
+              name: 'ChatGPT Codex OAuth',
+              url: 'https://chatgpt.com/backend-api/codex',
+              platform: 'codex',
+            },
+          },
+        ],
+        total: 2,
+        limit: 100,
+        offset: 0,
+      })
+      .mockRejectedValueOnce(new Error('列表刷新失败'));
+    apiMock.deleteOAuthRouteUnit.mockResolvedValue({ success: true });
+
+    let root!: WebTestRenderer;
+    try {
+      await act(async () => {
+        root = create(
+          <ToastProvider>
+            <MemoryRouter>
+              <OAuthManagement />
+            </MemoryRouter>
+          </ToastProvider>,
+        );
+      });
+      await flushMicrotasks();
+
+      const selectAll = root.root.find((node) => (
+        node.type === 'input'
+        && node.props.type === 'checkbox'
+        && node.props['data-testid'] === 'oauth-select-all'
+      ));
+
+      await act(async () => {
+        selectAll.props.onChange({ target: { checked: true } });
+      });
+
+      await clickButton(root, '拆回单体');
+
+      expect(apiMock.deleteOAuthRouteUnit).toHaveBeenCalledWith(96);
+      expect(apiMock.getOAuthConnections).toHaveBeenCalledTimes(2);
+      expect(collectText(root.root)).toContain('已拆回单体，但连接列表刷新失败');
+      expect(collectText(root.root)).toContain('Sticky Pool');
+      expect(collectText(root.root)).toContain('2 个成员');
+      expect(collectText(root.root)).toContain('单个用到不可用再切');
+    } finally {
+      root?.unmount();
+    }
+  });
+
   it('only enables splitting when the full route pool is selected and falls back to routeUnit ids', async () => {
     apiMock.getOAuthProviders.mockResolvedValue({
       providers: [
diff --git a/src/web/pages/OAuthManagement.tsx b/src/web/pages/OAuthManagement.tsx
index 199b3e0..a6d5dd0 100644
--- a/src/web/pages/OAuthManagement.tsx
+++ b/src/web/pages/OAuthManagement.tsx
@@ -102,6 +102,19 @@ type OAuthRouteUnitModalState = {
   strategy: OAuthRouteUnitStrategy;
 };
 
+type SessionRouteUnitFeedback = {
+  action: 'created' | 'deleted';
+  name: string;
+  memberCount: number;
+  strategy: OAuthRouteUnitStrategy;
+};
+
+type SessionFeedback = {
+  message: string;
+  tone: 'info' | 'success' | 'error';
+  routeUnit?: SessionRouteUnitFeedback | null;
+};
+
 const COLUMN_OPTIONS: Array<{ key: ColumnKey; label: string }> = [
   { key: 'identity', label: '账号 / Provider' },
   { key: 'site', label: '站点' },
@@ -619,7 +632,7 @@ export default function OAuthManagement() {
   const [providers, setProviders] = useState<OAuthProviderInfo[]>([]);
   const [connections, setConnections] = useState<OAuthConnectionInfo[]>([]);
   const [loaded, setLoaded] = useState(false);
-  const [sessionMessage, setSessionMessage] = useState('');
+  const [sessionFeedback, setSessionFeedback] = useState<SessionFeedback | null>(null);
   const [actionLoadingKey, setActionLoadingKey] = useState('');
   const [selectedConnectionIds, setSelectedConnectionIds] = useState<number[]>([]);
   const [showMobileFilters, setShowMobileFilters] = useState(false);
@@ -674,6 +687,47 @@ export default function OAuthManagement() {
     strategy: 'round_robin',
   });
 
+  const setSessionMessage = useCallback((
+    message: string,
+    tone: SessionFeedback['tone'],
+    options?: {
+      routeUnit?: SessionRouteUnitFeedback | null;
+    },
+  ) => {
+    setSessionFeedback({
+      message,
+      tone,
+      routeUnit: options?.routeUnit ?? null,
+    });
+  }, []);
+
+  const setSessionInfo = useCallback((
+    message: string,
+    options?: {
+      routeUnit?: SessionRouteUnitFeedback | null;
+    },
+  ) => {
+    setSessionMessage(message, 'info', options);
+  }, [setSessionMessage]);
+
+  const setSessionSuccess = useCallback((
+    message: string,
+    options?: {
+      routeUnit?: SessionRouteUnitFeedback | null;
+    },
+  ) => {
+    setSessionMessage(message, 'success', options);
+  }, [setSessionMessage]);
+
+  const setSessionError = useCallback((
+    message: string,
+    options?: {
+      routeUnit?: SessionRouteUnitFeedback | null;
+    },
+  ) => {
+    setSessionMessage(message, 'error', options);
+  }, [setSessionMessage]);
+
   const resetOauthProxySettings = useCallback(() => {
     setOauthCustomProxyEnabled(false);
     setOauthSystemProxyEnabled(false);
@@ -727,7 +781,7 @@ export default function OAuthManagement() {
       setSelectedProviderKey((current) => current || nextProviders[0]?.provider || '');
     } catch (error: any) {
       console.error('failed to load oauth management data', error);
-      setSessionMessage(error?.message || 'OAuth 管理数据加载失败');
+      setSessionError(error?.message || 'OAuth 管理数据加载失败');
     } finally {
       setLoaded(true);
     }
@@ -748,7 +802,7 @@ export default function OAuthManagement() {
       setAutoRefreshCountdown((current) => {
         if (current <= 1) {
           void loadConnections().catch((error: any) => {
-            setSessionMessage(error?.message || 'OAuth 连接列表刷新失败');
+            setSessionError(error?.message || 'OAuth 连接列表刷新失败');
           });
           return autoRefreshSeconds;
         }
@@ -770,7 +824,7 @@ export default function OAuthManagement() {
     setSelectedProviderKey(provider);
     setDrawerProjectId('');
     setDrawerOpen(true);
-    setSessionMessage('从建站流程跳转到 OAuth 管理，请在这里完成授权。');
+    setSessionInfo('从建站流程跳转到 OAuth 管理，请在这里完成授权。');
   }, [loaded, location.search, providers]);
 
   useEffect(() => {
@@ -785,23 +839,23 @@ export default function OAuthManagement() {
         if (cancelled) return;
 
         if (session.status === 'pending') {
-          setSessionMessage('等待授权完成');
+          setSessionInfo('等待授权完成');
           timer = setTimeout(poll, POLL_INTERVAL_MS);
           return;
         }
 
         if (session.status === 'success') {
-          setSessionMessage('授权成功');
+          setSessionSuccess('授权成功');
           await loadConnections();
           setActiveSession(null);
           return;
         }
 
-        setSessionMessage(`授权失败：${session.error || '未知错误'}`);
+        setSessionError(`授权失败：${session.error || '未知错误'}`);
         setActiveSession(null);
       } catch (error: any) {
         if (cancelled) return;
-        setSessionMessage(error?.message || 'OAuth 会话状态查询失败');
+        setSessionError(error?.message || 'OAuth 会话状态查询失败');
         setActiveSession(null);
       }
     };
@@ -956,7 +1010,7 @@ export default function OAuthManagement() {
     setOauthProxyUrl(connection.useSystemProxy ? '' : asTrimmedString(connection.proxyUrl));
     setDrawerOpen(true);
     setShowColumnMenu(false);
-    setSessionMessage('已打开 OAuth 代理设置，修改后可直接保存代理，或保存后重新授权。');
+    setSessionInfo('已打开 OAuth 代理设置，修改后可直接保存代理，或保存后重新授权。');
   };
 
   const openRouteUnitModal = () => {
@@ -1025,7 +1079,7 @@ export default function OAuthManagement() {
     if (drawerIntent.mode !== 'proxy') return;
     const customProxyUrl = asTrimmedString(oauthProxyUrl);
     if (oauthCustomProxyEnabled && !customProxyUrl) {
-      setSessionMessage('已开启代理，请先输入完整代理地址');
+      setSessionError('已开启代理，请先输入完整代理地址');
       return;
     }
 
@@ -1044,9 +1098,9 @@ export default function OAuthManagement() {
       await loadConnections();
       setDrawerOpen(false);
       resetOauthProxySettings();
-      setSessionMessage('代理已保存');
+      setSessionSuccess('代理已保存');
     } catch (error: any) {
-      setSessionMessage(error?.message || '保存代理失败');
+      setSessionError(error?.message || '保存代理失败');
     } finally {
       setActionLoadingKey('');
     }
@@ -1060,11 +1114,11 @@ export default function OAuthManagement() {
       || providers[0]
       || null;
     if (!provider) {
-      setSessionMessage('当前没有可用的 OAuth Provider。');
+      setSessionError('当前没有可用的 OAuth Provider。');
       return;
     }
     if (!provider.enabled) {
-      setSessionMessage(`${provider.label} 当前环境未启用`);
+      setSessionError(`${provider.label} 当前环境未启用`);
       return;
     }
 
@@ -1072,7 +1126,7 @@ export default function OAuthManagement() {
     const accountId = rebindAccount?.accountId;
     const customProxyUrl = asTrimmedString(oauthProxyUrl);
     if (oauthCustomProxyEnabled && !customProxyUrl) {
-      setSessionMessage('已开启代理，请先输入完整代理地址');
+      setSessionError('已开启代理，请先输入完整代理地址');
       return;
     }
 
@@ -1102,7 +1156,7 @@ export default function OAuthManagement() {
           ...proxySettings,
         });
 
-      setSessionMessage('等待授权完成');
+      setSessionInfo('等待授权完成');
       setActiveSession({
         provider: started.provider,
         state: started.state,
@@ -1112,7 +1166,7 @@ export default function OAuthManagement() {
       resetOauthProxySettings();
       openOAuthPopup(provider.provider, started.authorizationUrl);
     } catch (error: any) {
-      setSessionMessage(error?.message || '无法启动 OAuth 授权');
+      setSessionError(error?.message || '无法启动 OAuth 授权');
     } finally {
       setActionLoadingKey('');
     }
@@ -1122,15 +1176,15 @@ export default function OAuthManagement() {
     if (!activeSession) return;
     const callbackUrl = manualCallbackUrl.trim();
     if (!callbackUrl) {
-      setSessionMessage('请输入完整的回调 URL');
+      setSessionError('请输入完整的回调 URL');
       return;
     }
     setManualCallbackSubmitting(true);
     try {
       await api.submitOAuthManualCallback(activeSession.state, callbackUrl);
-      setSessionMessage('回调已提交，等待授权完成');
+      setSessionInfo('回调已提交，等待授权完成');
     } catch (error: any) {
-      setSessionMessage(error?.message || '提交回调 URL 失败');
+      setSessionError(error?.message || '提交回调 URL 失败');
     } finally {
       setManualCallbackSubmitting(false);
     }
@@ -1145,11 +1199,11 @@ export default function OAuthManagement() {
     setActionLoadingKey(actionKey);
     try {
       await api.deleteOAuthConnection(accountId);
-      setSessionMessage('连接已删除');
+      setSessionSuccess('连接已删除');
       await loadConnections();
       setSelectedConnectionIds((current) => current.filter((id) => id !== accountId));
     } catch (error: any) {
-      setSessionMessage(error?.message || '删除 OAuth 连接失败');
+      setSessionError(error?.message || '删除 OAuth 连接失败');
     } finally {
       setActionLoadingKey('');
     }
@@ -1167,9 +1221,11 @@ export default function OAuthManagement() {
       const failed = results.filter((item) => item.status === 'rejected').length;
       await loadConnections();
       setSelectedConnectionIds([]);
-      setSessionMessage(failed > 0
-        ? `批量删除完成，${failed} 个连接删除失败`
-        : `已删除 ${results.length} 个 OAuth 连接`);
+      if (failed > 0) {
+        setSessionInfo(`批量删除完成，${failed} 个连接删除失败`);
+      } else {
+        setSessionSuccess(`已删除 ${results.length} 个 OAuth 连接`);
+      }
     } finally {
       setActionLoadingKey('');
     }
@@ -1180,10 +1236,10 @@ export default function OAuthManagement() {
     setActionLoadingKey(actionKey);
     try {
       await api.refreshOAuthConnectionQuota(accountId);
-      setSessionMessage('额度信息已刷新');
+      setSessionSuccess('额度信息已刷新');
       await loadConnections();
     } catch (error: any) {
-      setSessionMessage(error?.message || '刷新额度失败');
+      setSessionError(error?.message || '刷新额度失败');
     } finally {
       setActionLoadingKey('');
     }
@@ -1195,11 +1251,13 @@ export default function OAuthManagement() {
     try {
       const result = await api.refreshOAuthConnectionQuotaBatch(selectedConnectionIds);
       await loadConnections();
-      setSessionMessage(result.failed > 0
-        ? `批量刷新完成，成功 ${result.refreshed} 个，失败 ${result.failed} 个`
-        : `已批量刷新 ${result.refreshed} 个 OAuth 连接`);
+      if (result.failed > 0) {
+        setSessionInfo(`批量刷新完成，成功 ${result.refreshed} 个，失败 ${result.failed} 个`);
+      } else {
+        setSessionSuccess(`已批量刷新 ${result.refreshed} 个 OAuth 连接`);
+      }
     } catch (error: any) {
-      setSessionMessage(error?.message || '批量刷新额度失败');
+      setSessionError(error?.message || '批量刷新额度失败');
     } finally {
       setActionLoadingKey('');
     }
@@ -1251,11 +1309,11 @@ export default function OAuthManagement() {
       applyLoadedModelsModal(connection, result);
       if (options.refreshUpstream) {
         await loadConnections();
-        setSessionMessage('模型列表已刷新');
+        setSessionSuccess('模型列表已刷新');
       }
     } catch (error: any) {
       if (modelsModalRequestSeqRef.current !== requestId) return;
-      setSessionMessage(error?.message || '加载模型列表失败');
+      setSessionError(error?.message || '加载模型列表失败');
       setModelsModal((current) => (
         options.closeOnError
           ? {
@@ -1342,15 +1400,15 @@ export default function OAuthManagement() {
 
   const handleImport = async () => {
     if (importSources.length <= 0) {
-      setSessionMessage('请先选择 JSON 文件或粘贴 OAuth 连接 JSON 内容');
+      setSessionError('请先选择 JSON 文件或粘贴 OAuth 连接 JSON 内容');
       return;
     }
     if (!importPreviewSummary?.canImport) {
-      setSessionMessage('请先修正无效的 OAuth JSON');
+      setSessionError('请先修正无效的 OAuth JSON');
       return;
     }
     if (importCustomProxyEnabled && !asTrimmedString(importProxyUrl)) {
-      setSessionMessage('已开启代理，请先输入完整代理地址');
+      setSessionError('已开启代理，请先输入完整代理地址');
       return;
     }
 
@@ -1384,12 +1442,16 @@ export default function OAuthManagement() {
       } else {
         toast.success(importMessage);
       }
-      setSessionMessage(importMessage);
+      if (result.failed > 0) {
+        setSessionInfo(importMessage);
+      } else {
+        setSessionSuccess(importMessage);
+      }
       closeImportModal();
     } catch (error: any) {
       const message = error?.message || '导入 OAuth JSON 失败';
       toast.error(message);
-      setSessionMessage(message);
+      setSessionError(message);
     } finally {
       setImporting(false);
     }
@@ -1399,23 +1461,49 @@ export default function OAuthManagement() {
     const name = asTrimmedString(routeUnitModal.name);
     if (!canMergeSelectedIntoRouteUnit || selectedConnections.length < 2) return;
     if (!name) {
-      setSessionMessage('请先输入路由池名称');
+      setSessionError('请先输入路由池名称');
       return;
     }
 
     setActionLoadingKey('route-unit:create');
     try {
-      await api.createOAuthRouteUnit({
+      const result = await api.createOAuthRouteUnit({
         accountIds: selectedConnections.map((connection) => connection.accountId),
         name,
         strategy: routeUnitModal.strategy,
       });
-      await loadConnections();
+      const routeUnitDefaults: SessionRouteUnitFeedback = {
+        action: 'created' as const,
+        name: asTrimmedString(name) || name,
+        memberCount: selectedConnections.length,
+        strategy: routeUnitModal.strategy,
+      };
+      const routeUnit: SessionRouteUnitFeedback = result.routeUnit
+        ? {
+          ...routeUnitDefaults,
+          name: asTrimmedString(result.routeUnit.name) || routeUnitDefaults.name,
+          memberCount: result.routeUnit.memberCount || routeUnitDefaults.memberCount,
+          strategy: result.routeUnit.strategy || routeUnitDefaults.strategy,
+        }
+        : routeUnitDefaults;
+      toast.success(`已创建路由池：${routeUnit.name}`);
+      setSessionSuccess('已创建路由池', {
+        routeUnit,
+      });
       setSelectedConnectionIds([]);
       closeRouteUnitModal();
-      setSessionMessage('已合并为路由池');
+      try {
+        await loadConnections();
+      } catch {
+        toast.error('OAuth 连接列表刷新失败');
+        setSessionError('已创建路由池，但连接列表刷新失败', {
+          routeUnit,
+        });
+      }
     } catch (error: any) {
-      setSessionMessage(error?.message || '创建路由池失败');
+      const message = error?.message || '创建路由池失败';
+      toast.error(message);
+      setSessionError(message);
     } finally {
       setActionLoadingKey('');
     }
@@ -1428,12 +1516,30 @@ export default function OAuthManagement() {
 
     setActionLoadingKey('route-unit:delete');
     try {
+      const routeUnitFeedback = {
+        action: 'deleted' as const,
+        name: selectedRouteUnitParticipation.name,
+        memberCount: selectedRouteUnitParticipation.memberCount,
+        strategy: selectedRouteUnitParticipation.strategy,
+      };
       await api.deleteOAuthRouteUnit(routeUnitId);
-      await loadConnections();
+      toast.success(`已拆回单体：${routeUnitFeedback.name}`);
+      setSessionSuccess('已拆回单体', {
+        routeUnit: routeUnitFeedback,
+      });
       setSelectedConnectionIds([]);
-      setSessionMessage('已拆回单体');
+      try {
+        await loadConnections();
+      } catch {
+        toast.error('OAuth 连接列表刷新失败');
+        setSessionError('已拆回单体，但连接列表刷新失败', {
+          routeUnit: routeUnitFeedback,
+        });
+      }
     } catch (error: any) {
-      setSessionMessage(error?.message || '拆回单体失败');
+      const message = error?.message || '拆回单体失败';
+      toast.error(message);
+      setSessionError(message);
     } finally {
       setActionLoadingKey('');
     }
@@ -1930,9 +2036,26 @@ export default function OAuthManagement() {
         ) : null}
       </div>
 
-      {sessionMessage ? (
-        <div className="card oauth-page-message">
-          <div className="oauth-page-message-text">{sessionMessage}</div>
+      {sessionFeedback ? (
+        <div className={`card oauth-page-message oauth-page-message-${sessionFeedback.tone}`.trim()}>
+          <div className="oauth-page-message-head">
+            <div className="oauth-page-message-text">{sessionFeedback.message}</div>
+            <span className={`badge ${sessionFeedback.tone === 'success' ? 'badge-success' : sessionFeedback.tone === 'error' ? 'badge-danger' : 'badge-info'}`}>
+              {sessionFeedback.tone === 'success' ? '成功' : sessionFeedback.tone === 'error' ? '失败' : '提示'}
+            </span>
+          </div>
+          {sessionFeedback.routeUnit ? (
+            <div className="oauth-page-message-meta">
+              <span className="badge badge-info">{sessionFeedback.routeUnit.name}</span>
+              <span className="badge badge-muted">{sessionFeedback.routeUnit.memberCount} 个成员</span>
+              <span className="badge badge-muted">{resolveRouteUnitStrategyLabel(sessionFeedback.routeUnit.strategy)}</span>
+              <div className="oauth-page-message-detail">
+                {sessionFeedback.routeUnit.action === 'created'
+                  ? '已将选中的 OAuth 账号合并为一个路由池，后续会以单个路由单元参与路由。'
+                  : '该路由池已拆分回单体账号，后续会分别参与路由。'}
+              </div>
+            </div>
+          ) : null}
         </div>
       ) : null}