feat: implement LoadingSpinner component and replace existing loaders across the application

web/src/app/auth/space/callback/page.tsx

@@ -19,6 +19,7 @@ import {
   CardDescription,
 } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
+import { LoadingSpinner } from '@/components/ui/loading-spinner';
 import langbotIcon from '@/app/assets/langbot-logo.webp';
 
 function SpaceOAuthCallbackContent() {
@@ -174,9 +175,7 @@ function SpaceOAuthCallbackContent() {
           </CardDescription>
         </CardHeader>
         <CardContent className="flex flex-col items-center space-y-4">
-          {status === 'loading' && (
-            <Loader2 className="h-12 w-12 animate-spin text-primary" />
-          )}
+          {status === 'loading' && <LoadingSpinner size="lg" text="" />}
           {status === 'confirm' && (
             <>
               <AlertTriangle className="h-12 w-12 text-yellow-500" />
@@ -232,7 +231,7 @@ function LoadingFallback() {
     <div className="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-neutral-900">
       <Card className="w-[400px] shadow-lg dark:shadow-white/10">
         <CardContent className="flex flex-col items-center py-12">
-          <Loader2 className="h-12 w-12 animate-spin text-primary" />
+          <LoadingSpinner size="lg" text="" />
         </CardContent>
       </Card>
     </div>

web/src/app/home/components/home-sidebar/HomeSidebar.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import styles from './HomeSidebar.module.css';
-import { useEffect, useState, Suspense } from 'react';
+import { useEffect, useState } from 'react';
 import {
   SidebarChild,
   SidebarChildVO,
@@ -20,7 +20,6 @@ import {
   Lightbulb,
   LogOut,
   KeyRound,
-  Loader2,
 } from 'lucide-react';
 import { useTheme } from 'next-themes';
 
@@ -59,7 +58,7 @@ function compareVersions(v1: string, v2: string): boolean {
 }
 
 // TODO 侧边导航栏要加动画
-function HomeSidebarContent({
+export default function HomeSidebar({
   onSelectedChangeAction,
 }: {
   onSelectedChangeAction: (sidebarChild: SidebarChildVO) => void;
@@ -484,25 +483,3 @@ function HomeSidebarContent({
     </div>
   );
 }
-
-function SidebarLoadingFallback() {
-  return (
-    <div className={`${styles.sidebarContainer}`}>
-      <div className="flex items-center justify-center h-full">
-        <Loader2 className="h-6 w-6 animate-spin" />
-      </div>
-    </div>
-  );
-}
-
-export default function HomeSidebar({
-  onSelectedChangeAction,
-}: {
-  onSelectedChangeAction: (sidebarChild: SidebarChildVO) => void;
-}) {
-  return (
-    <Suspense fallback={<SidebarLoadingFallback />}>
-      <HomeSidebarContent onSelectedChangeAction={onSelectedChangeAction} />
-    </Suspense>
-  );
-}

web/src/app/home/loading.tsx

@@ -0,0 +1,5 @@
+import { LoadingPage } from '@/components/ui/loading-spinner';
+
+export default function Loading() {
+  return <LoadingPage />;
+}

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

@@ -13,6 +13,7 @@ import { MessageDetailsCard } from './components/MessageDetailsCard';
 import { MessageContentRenderer } from './components/MessageContentRenderer';
 import { MessageDetails } from './types/monitoring';
 import { httpClient } from '@/app/infra/http/HttpClient';
+import { LoadingSpinner, LoadingPage } from '@/components/ui/loading-spinner';
 
 interface RawMessageData {
   id: string;
@@ -262,11 +263,10 @@ function MonitoringPageContent() {
             <TabsContent value="messages" className="p-6 m-0">
               <div>
                 {loading && (
-                  <div className="text-center text-gray-500 dark:text-gray-400 py-12">
-                    <div className="inline-block animate-spin rounded-full h-10 w-10 border-b-2 border-blue-600 dark:border-blue-400 mb-4"></div>
-                    <p className="text-sm font-medium">
-                      {t('monitoring.messageList.loading')}
-                    </p>
+                  <div className="py-12 flex justify-center">
+                    <LoadingSpinner
+                      text={t('monitoring.messageList.loading')}
+                    />
                   </div>
                 )}
 
@@ -363,8 +363,8 @@ function MonitoringPageContent() {
                             {expandedMessageId === msg.id && (
                               <div className="border-t border-gray-200 dark:border-gray-700 p-4 bg-gray-50 dark:bg-gray-900">
                                 {loadingDetails[msg.id] && (
-                                  <div className="text-center text-gray-500 dark:text-gray-400 py-4">
-                                    <div className="inline-block animate-spin rounded-full h-6 w-6 border-b-2 border-gray-900 dark:border-white"></div>
+                                  <div className="py-4 flex justify-center">
+                                    <LoadingSpinner size="sm" text="" />
                                   </div>
                                 )}
                                 {!loadingDetails[msg.id] &&
@@ -410,9 +410,8 @@ function MonitoringPageContent() {
             <TabsContent value="modelCalls" className="p-6 m-0">
               <div>
                 {loading && (
-                  <div className="text-center text-gray-500 dark:text-gray-400 py-12">
-                    <div className="inline-block animate-spin rounded-full h-10 w-10 border-b-2 border-blue-600 dark:border-blue-400 mb-4"></div>
-                    <p className="text-sm font-medium">{t('common.loading')}</p>
+                  <div className="py-12 flex justify-center">
+                    <LoadingSpinner text={t('common.loading')} />
                   </div>
                 )}
 
@@ -629,9 +628,8 @@ function MonitoringPageContent() {
             <TabsContent value="errors" className="p-6 m-0">
               <div>
                 {loading && (
-                  <div className="text-center text-gray-500 dark:text-gray-400 py-12">
-                    <div className="inline-block animate-spin rounded-full h-10 w-10 border-b-2 border-blue-600 dark:border-blue-400 mb-4"></div>
-                    <p className="text-sm font-medium">{t('common.loading')}</p>
+                  <div className="py-12 flex justify-center">
+                    <LoadingSpinner text={t('common.loading')} />
                   </div>
                 )}
 
@@ -810,7 +808,7 @@ function MonitoringPageContent() {
 
 export default function MonitoringPage() {
   return (
-    <Suspense fallback={<div>Loading...</div>}>
+    <Suspense fallback={<LoadingPage />}>
       <MonitoringPageContent />
     </Suspense>
   );

web/src/app/home/plugins/components/plugin-market/PluginMarketComponent.tsx

@@ -27,6 +27,7 @@ import { PluginV4 } from '@/app/infra/entities/plugin';
 import { extractI18nObject } from '@/i18n/I18nProvider';
 import { toast } from 'sonner';
 import { ApiRespMarketplacePlugins } from '@/app/infra/entities/api';
+import { LoadingSpinner } from '@/components/ui/loading-spinner';
 
 interface SortOption {
   value: string;
@@ -460,8 +461,7 @@ function MarketPageContent({
       >
         {isLoading ? (
           <div className="flex items-center justify-center py-12">
-            <Loader2 className="h-8 w-8 animate-spin" />
-            <span className="ml-2">{t('market.loading')}</span>
+            <LoadingSpinner text={t('market.loading')} />
           </div>
         ) : plugins.length === 0 ? (
           <div className="flex items-center justify-center py-12">
@@ -484,8 +484,7 @@ function MarketPageContent({
             {/* Loading more indicator */}
             {isLoadingMore && (
               <div className="flex items-center justify-center py-6">
-                <Loader2 className="h-6 w-6 animate-spin" />
-                <span className="ml-2">{t('market.loadingMore')}</span>
+                <LoadingSpinner size="sm" text={t('market.loadingMore')} />
               </div>
             )}
 
@@ -522,8 +521,7 @@ export default function MarketPage({
       fallback={
         <div className="container mx-auto px-4 py-6">
           <div className="flex items-center justify-center py-12">
-            <Loader2 className="h-8 w-8 animate-spin" />
-            <span className="ml-2">加载中...</span>
+            <LoadingSpinner text="加载中..." />
           </div>
         </div>
       }

web/src/app/login/page.tsx

@@ -29,6 +29,7 @@ import { toast } from 'sonner';
 import { useTranslation } from 'react-i18next';
 import Link from 'next/link';
 import { ThemeToggle } from '@/components/ui/theme-toggle';
+import { LoadingSpinner } from '@/components/ui/loading-spinner';
 
 const formSchema = (t: (key: string) => string) =>
   z.object({
@@ -123,7 +124,7 @@ export default function Login() {
   if (loading) {
     return (
       <div className="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-neutral-900">
-        <Loader2 className="h-8 w-8 animate-spin text-primary" />
+        <LoadingSpinner />
       </div>
     );
   }

web/src/components/ui/loading-spinner.tsx

@@ -0,0 +1,83 @@
+import { Loader2 } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+interface LoadingSpinnerProps {
+  /**
+   * Size variant of the spinner
+   * @default 'default'
+   */
+  size?: 'sm' | 'default' | 'lg';
+  /**
+   * Additional CSS classes
+   */
+  className?: string;
+  /**
+   * Loading text to display below the spinner
+   */
+  text?: string;
+  /**
+   * Whether to display as full page overlay
+   * @default false
+   */
+  fullPage?: boolean;
+}
+
+const sizeMap = {
+  sm: 'h-4 w-4',
+  default: 'h-8 w-8',
+  lg: 'h-12 w-12',
+};
+
+const textSizeMap = {
+  sm: 'text-xs',
+  default: 'text-sm',
+  lg: 'text-base',
+};
+
+export function LoadingSpinner({
+  size = 'default',
+  className,
+  text = '加载中...',
+  fullPage = false,
+}: LoadingSpinnerProps) {
+  const spinner = (
+    <div className="flex flex-col items-center gap-4">
+      <Loader2
+        className={cn('animate-spin text-primary', sizeMap[size], className)}
+      />
+      {text && (
+        <p className={cn('text-muted-foreground', textSizeMap[size])}>{text}</p>
+      )}
+    </div>
+  );
+
+  if (fullPage) {
+    return (
+      <div className="fixed inset-0 flex items-center justify-center bg-background">
+        {spinner}
+      </div>
+    );
+  }
+
+  return spinner;
+}
+
+/**
+ * Full page loading component for use in page.tsx or layout.tsx
+ */
+export function LoadingPage({ text }: { text?: string }) {
+  return <LoadingSpinner fullPage text={text} />;
+}
+
+/**
+ * Inline loading component for use within components
+ */
+export function LoadingInline({
+  size,
+  text,
+}: {
+  size?: 'sm' | 'default' | 'lg';
+  text?: string;
+}) {
+  return <LoadingSpinner size={size} text={text} />;
+}