Update translations and add language settings

lightrag_webui/src/components/AppSettings.tsx

@@ -0,0 +1,66 @@
+import { useState, useCallback } from 'react'
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/Popover'
+import Button from '@/components/ui/Button'
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/Select'
+import { useSettingsStore } from '@/stores/settings'
+import { PaletteIcon } from 'lucide-react'
+import { useTranslation } from 'react-i18next'
+
+export default function AppSettings() {
+  const [opened, setOpened] = useState<boolean>(false)
+  const { t } = useTranslation()
+  
+  const language = useSettingsStore.use.language()
+  const setLanguage = useSettingsStore.use.setLanguage()
+  
+  const theme = useSettingsStore.use.theme()
+  const setTheme = useSettingsStore.use.setTheme()
+
+  const handleLanguageChange = useCallback((value: string) => {
+    setLanguage(value as 'en' | 'zh')
+  }, [setLanguage])
+
+  const handleThemeChange = useCallback((value: string) => {
+    setTheme(value as 'light' | 'dark' | 'system')
+  }, [setTheme])
+
+  return (
+    <Popover open={opened} onOpenChange={setOpened}>
+      <PopoverTrigger asChild>
+        <Button variant="outline" size="icon" className="h-9 w-9">
+          <PaletteIcon className="h-5 w-5" />
+        </Button>
+      </PopoverTrigger>
+      <PopoverContent side="bottom" align="end" className="w-56">
+        <div className="flex flex-col gap-4">
+          <div className="flex flex-col gap-2">
+            <label className="text-sm font-medium">{t('settings.language')}</label>
+            <Select value={language} onValueChange={handleLanguageChange}>
+              <SelectTrigger>
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem value="en">English</SelectItem>
+                <SelectItem value="zh">中文</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+
+          <div className="flex flex-col gap-2">
+            <label className="text-sm font-medium">{t('settings.theme')}</label>
+            <Select value={theme} onValueChange={handleThemeChange}>
+              <SelectTrigger>
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem value="light">{t('settings.light')}</SelectItem>
+                <SelectItem value="dark">{t('settings.dark')}</SelectItem>
+                <SelectItem value="system">{t('settings.system')}</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+        </div>
+      </PopoverContent>
+    </Popover>
+  )
+}

lightrag_webui/src/components/ThemeProvider.tsx

@@ -1,4 +1,4 @@
-import { createContext, useEffect, useState } from 'react'
+import { createContext, useEffect } from 'react'
 import { Theme, useSettingsStore } from '@/stores/settings'
 
 type ThemeProviderProps = {
@@ -21,30 +21,32 @@ const ThemeProviderContext = createContext<ThemeProviderState>(initialState)
  * Component that provides the theme state and setter function to its children.
  */
 export default function ThemeProvider({ children, ...props }: ThemeProviderProps) {
-  const [theme, setTheme] = useState<Theme>(useSettingsStore.getState().theme)
+  const theme = useSettingsStore.use.theme()
+  const setTheme = useSettingsStore.use.setTheme()
 
   useEffect(() => {
     const root = window.document.documentElement
     root.classList.remove('light', 'dark')
 
     if (theme === 'system') {
-      const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches
-        ? 'dark'
-        : 'light'
-      root.classList.add(systemTheme)
-      setTheme(systemTheme)
-      return
+      const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
+      const handleChange = (e: MediaQueryListEvent) => {
+        root.classList.remove('light', 'dark')
+        root.classList.add(e.matches ? 'dark' : 'light')
+      }
+      
+      root.classList.add(mediaQuery.matches ? 'dark' : 'light')
+      mediaQuery.addEventListener('change', handleChange)
+      
+      return () => mediaQuery.removeEventListener('change', handleChange)
+    } else {
+      root.classList.add(theme)
     }
-
-    root.classList.add(theme)
   }, [theme])
 
   const value = {
     theme,
-    setTheme: (theme: Theme) => {
-      useSettingsStore.getState().setTheme(theme)
-      setTheme(theme)
-    }
+    setTheme
   }
 
   return (