Added language and theme switching function to login page and homepage

lightrag_webui/src/features/LoginPage.tsx

@@ -3,15 +3,19 @@ import { useNavigate } from 'react-router-dom'
 import { useAuthStore } from '@/stores/state'
 import { loginToServer } from '@/api/lightrag'
 import { toast } from 'sonner'
+import { useTranslation } from 'react-i18next'
 
 import { Card, CardContent, CardHeader } from '@/components/ui/Card'
 import Input from '@/components/ui/Input'
 import Button from '@/components/ui/Button'
 import { ZapIcon } from 'lucide-react'
+import ThemeToggle from '@/components/ThemeToggle'
+import LanguageToggle from '@/components/LanguageToggle'
 
 const LoginPage = () => {
   const navigate = useNavigate()
   const { login } = useAuthStore()
+  const { t } = useTranslation()
   const [loading, setLoading] = useState(false)
   const [username, setUsername] = useState('')
   const [password, setPassword] = useState('')
@@ -19,7 +23,7 @@ const LoginPage = () => {
   const handleSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
     e.preventDefault()
     if (!username || !password) {
-      toast.error('Please enter your username and password')
+      toast.error(t('login.errorEmptyFields'))
       return
     }
 
@@ -28,10 +32,10 @@ const LoginPage = () => {
       const response = await loginToServer(username, password)
       login(response.access_token)
       navigate('/')
-      toast.success('Login succeeded')
+      toast.success(t('login.successMessage'))
     } catch (error) {
       console.error('Login failed...', error)
-      toast.error('Login failed, please check username and password')
+      toast.error(t('login.errorInvalidCredentials'))
     } finally {
       setLoading(false)
     }
@@ -39,6 +43,10 @@ const LoginPage = () => {
 
   return (
     <div className="flex h-screen w-screen items-center justify-center bg-gradient-to-br from-emerald-50 to-teal-100 dark:from-gray-900 dark:to-gray-800">
+      <div className="absolute top-4 right-4 flex items-center gap-2">
+        <LanguageToggle />
+        <ThemeToggle />
+      </div>
       <Card className="w-full max-w-[480px] shadow-lg mx-4">
         <CardHeader className="flex items-center justify-center space-y-2 pb-8 pt-6">
           <div className="flex flex-col items-center space-y-4">
@@ -49,7 +57,7 @@ const LoginPage = () => {
             <div className="text-center space-y-2">
               <h1 className="text-3xl font-bold tracking-tight">LightRAG</h1>
               <p className="text-muted-foreground text-sm">
-              Please enter your account and password to log in to the system
+                {t('login.description')}
               </p>
             </div>
           </div>
@@ -58,11 +66,11 @@ const LoginPage = () => {
           <form onSubmit={handleSubmit} className="space-y-6">
             <div className="flex items-center gap-4">
               <label htmlFor="username" className="text-sm font-medium w-16 shrink-0">
-              username
+                {t('login.username')}
               </label>
               <Input
                 id="username"
-                placeholder="Please input a username"
+                placeholder={t('login.usernamePlaceholder')}
                 value={username}
                 onChange={(e) => setUsername(e.target.value)}
                 required
@@ -71,12 +79,12 @@ const LoginPage = () => {
             </div>
             <div className="flex items-center gap-4">
               <label htmlFor="password" className="text-sm font-medium w-16 shrink-0">
-              password
+                {t('login.password')}
               </label>
               <Input
                 id="password"
                 type="password"
-                placeholder="Please input a password"
+                placeholder={t('login.passwordPlaceholder')}
                 value={password}
                 onChange={(e) => setPassword(e.target.value)}
                 required
@@ -88,7 +96,7 @@ const LoginPage = () => {
               className="w-full h-11 text-base font-medium mt-2"
               disabled={loading}
             >
-              {loading ? 'Logging in...' : 'Login'}
+              {loading ? t('login.loggingIn') : t('login.loginButton')}
             </Button>
           </form>
         </CardContent>

lightrag_webui/src/features/SiteHeader.tsx

@@ -1,6 +1,7 @@
 import Button from '@/components/ui/Button'
 import { SiteInfo } from '@/lib/constants'
 import ThemeToggle from '@/components/ThemeToggle'
+import LanguageToggle from '@/components/LanguageToggle'
 import { TabsList, TabsTrigger } from '@/components/ui/Tabs'
 import { useSettingsStore } from '@/stores/settings'
 import { useAuthStore } from '@/stores/state'
@@ -82,6 +83,7 @@ export default function SiteHeader() {
             <GithubIcon className="size-4" aria-hidden="true" />
           </a>
         </Button>
+        <LanguageToggle />
         <ThemeToggle />
         <Button
           variant="ghost"