feat: Implement extension and bot limitations across services and UI (#1991)

- Added checks for maximum allowed extensions, bots, and pipelines in the backend services (PluginsRouterGroup, BotService, MCPService, PipelineService).
- Updated system configuration to include limitation settings for max_bots, max_pipelines, and max_extensions.
- Enhanced frontend components to handle limitations, providing user feedback when limits are reached.
- Added internationalization support for limitation messages in English, Japanese, Simplified Chinese, and Traditional Chinese.

web/src/app/home/bots/page.tsx

@@ -12,6 +12,7 @@ import { useTranslation } from 'react-i18next';
 import { extractI18nObject } from '@/i18n/I18nProvider';
 import BotDetailDialog from '@/app/home/bots/BotDetailDialog';
 import { CustomApiError } from '@/app/infra/entities/common';
+import { systemInfo } from '@/app/infra/http';
 
 export default function BotConfigPage() {
   const { t } = useTranslation();
@@ -60,6 +61,11 @@ export default function BotConfigPage() {
   }
 
   function handleCreateBotClick() {
+    const maxBots = systemInfo.limitation?.max_bots ?? -1;
+    if (maxBots >= 0 && botList.length >= maxBots) {
+      toast.error(t('limitation.maxBotsReached', { max: maxBots }));
+      return;
+    }
     setSelectedBotId('');
     setDetailDialogOpen(true);
   }

web/src/app/home/pipelines/page.tsx

@@ -15,6 +15,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select';
+import { systemInfo } from '@/app/infra/http';
 
 export default function PluginConfigPage() {
   const { t } = useTranslation();
@@ -87,6 +88,11 @@ export default function PluginConfigPage() {
   };
 
   const handleCreateNew = () => {
+    const maxPipelines = systemInfo.limitation?.max_pipelines ?? -1;
+    if (maxPipelines >= 0 && pipelineList.length >= maxPipelines) {
+      toast.error(t('limitation.maxPipelinesReached', { max: maxPipelines }));
+      return;
+    }
     setIsEditForm(false);
     setSelectedPipelineId('');
     setDialogOpen(true);

web/src/app/home/plugins/mcp-server/mcp-form/MCPFormDialog.tsx

@@ -453,7 +453,10 @@ export default function MCPFormDialog({
       onSuccess?.();
     } catch (error) {
       console.error('Failed to save MCP server:', error);
-      toast.error(isEditMode ? t('mcp.updateFailed') : t('mcp.createFailed'));
+      const errMsg = (error as CustomApiError).msg || '';
+      toast.error(
+        (isEditMode ? t('mcp.updateFailed') : t('mcp.createFailed')) + errMsg,
+      );
     }
   }
 

web/src/app/home/plugins/page.tsx

@@ -186,6 +186,28 @@ export default function PluginConfigPage() {
     setFetchingAssets(false);
   }
 
+  async function checkExtensionsLimit(): Promise<boolean> {
+    const maxExtensions = systemInfo.limitation?.max_extensions ?? -1;
+    if (maxExtensions < 0) return true;
+    try {
+      const [pluginsResp, mcpResp] = await Promise.all([
+        httpClient.getPlugins(),
+        httpClient.getMCPServers(),
+      ]);
+      const total =
+        (pluginsResp.plugins?.length ?? 0) + (mcpResp.servers?.length ?? 0);
+      if (total >= maxExtensions) {
+        toast.error(
+          t('limitation.maxExtensionsReached', { max: maxExtensions }),
+        );
+        return false;
+      }
+    } catch {
+      // If we can't check, let backend handle it
+    }
+    return true;
+  }
+
   async function fetchGithubReleases() {
     if (!githubURL.trim()) {
       toast.error(t('plugins.enterRepoUrl'));
@@ -328,6 +350,8 @@ export default function PluginConfigPage() {
         return;
       }
 
+      if (!(await checkExtensionsLimit())) return;
+
       setModalOpen(true);
       setPluginInstallStatus(PluginInstallStatus.INSTALLING);
       setInstallError(null);
@@ -336,7 +360,8 @@ export default function PluginConfigPage() {
     [t, pluginSystemStatus, installPlugin],
   );
 
-  const handleFileSelect = useCallback(() => {
+  const handleFileSelect = useCallback(async () => {
+    if (!(await checkExtensionsLimit())) return;
     if (fileInputRef.current) {
       fileInputRef.current.click();
     }
@@ -633,7 +658,8 @@ export default function PluginConfigPage() {
                 {activeTab === 'mcp-servers' ? (
                   <>
                     <DropdownMenuItem
-                      onClick={() => {
+                      onClick={async () => {
+                        if (!(await checkExtensionsLimit())) return;
                         setActiveTab('mcp-servers');
                         setIsEditMode(false);
                         setEditingServerName(null);
@@ -661,7 +687,8 @@ export default function PluginConfigPage() {
                       {t('plugins.uploadLocal')}
                     </DropdownMenuItem>
                     <DropdownMenuItem
-                      onClick={() => {
+                      onClick={async () => {
+                        if (!(await checkExtensionsLimit())) return;
                         setInstallSource('github');
                         setPluginInstallStatus(PluginInstallStatus.WAIT_INPUT);
                         setInstallError(null);
@@ -683,7 +710,8 @@ export default function PluginConfigPage() {
         </TabsContent>
         <TabsContent value="market" className="flex-1 overflow-y-auto mt-0">
           <MarketPage
-            installPlugin={(plugin: PluginV4) => {
+            installPlugin={async (plugin: PluginV4) => {
+              if (!(await checkExtensionsLimit())) return;
               setInstallSource('marketplace');
               setInstallInfo({
                 plugin_author: plugin.author,

web/src/app/infra/entities/api/index.ts

@@ -240,13 +240,21 @@ export interface PluginReorderElement {
 }
 
 // system
+export interface SystemLimitation {
+  max_bots: number;
+  max_pipelines: number;
+  max_extensions: number;
+}
+
 export interface ApiRespSystemInfo {
   debug: boolean;
   version: string;
+  edition: string;
   cloud_service_url: string;
   enable_marketplace: boolean;
   allow_modify_login_info: boolean;
   disable_models_service: boolean;
+  limitation: SystemLimitation;
 }
 
 export interface ApiRespPluginSystemStatus {

web/src/app/infra/http/index.ts

@@ -6,10 +6,16 @@ import { ApiRespSystemInfo } from '@/app/infra/entities/api';
 export let systemInfo: ApiRespSystemInfo = {
   debug: false,
   version: '',
+  edition: 'community',
   enable_marketplace: true,
   cloud_service_url: '',
   allow_modify_login_info: true,
   disable_models_service: false,
+  limitation: {
+    max_bots: -1,
+    max_pipelines: -1,
+    max_extensions: -1,
+  },
 };
 
 // 用户信息

web/src/i18n/locales/en-US.ts

@@ -962,6 +962,14 @@ const enUS = {
       sessions: 'Sessions',
     },
   },
+  limitation: {
+    maxBotsReached:
+      'Maximum number of bots ({{max}}) reached. Please remove an existing bot before creating a new one.',
+    maxPipelinesReached:
+      'Maximum number of pipelines ({{max}}) reached. Please remove an existing pipeline before creating a new one.',
+    maxExtensionsReached:
+      'Maximum number of extensions ({{max}}) reached. Please remove an existing MCP server or plugin before adding a new one.',
+  },
 };
 
 export default enUS;

web/src/i18n/locales/ja-JP.ts

@@ -949,6 +949,14 @@ const jaJP = {
       sessions: 'セッション',
     },
   },
+  limitation: {
+    maxBotsReached:
+      'ボット数が上限（{{max}}個）に達しました。新しいボットを作成するには、既存のボットを削除してください。',
+    maxPipelinesReached:
+      'パイプライン数が上限（{{max}}個）に達しました。新しいパイプラインを作成するには、既存のパイプラインを削除してください。',
+    maxExtensionsReached:
+      '拡張機能数が上限（{{max}}個）に達しました。新しい MCP サーバーやプラグインを追加するには、既存のものを削除してください。',
+  },
 };
 
 export default jaJP;

web/src/i18n/locales/zh-Hans.ts

@@ -922,6 +922,14 @@ const zhHans = {
       sessions: '会话记录',
     },
   },
+  limitation: {
+    maxBotsReached:
+      '已达到机器人数量上限（{{max}}个）。请先删除已有机器人后再创建新的。',
+    maxPipelinesReached:
+      '已达到流水线数量上限（{{max}}个）。请先删除已有流水线后再创建新的。',
+    maxExtensionsReached:
+      '已达到扩展数量上限（{{max}}个）。请先删除已有的 MCP 服务器或插件后再添加新的。',
+  },
 };
 
 export default zhHans;

web/src/i18n/locales/zh-Hant.ts

@@ -897,6 +897,14 @@ const zhHant = {
       sessions: '會話記錄',
     },
   },
+  limitation: {
+    maxBotsReached:
+      '已達到機器人數量上限（{{max}}個）。請先刪除已有機器人後再建立新的。',
+    maxPipelinesReached:
+      '已達到流水線數量上限（{{max}}個）。請先刪除已有流水線後再建立新的。',
+    maxExtensionsReached:
+      '已達到擴充功能數量上限（{{max}}個）。請先刪除已有的 MCP 伺服器或外掛後再新增。',
+  },
 };
 
 export default zhHant;