feat: add translate

2026-01-24 13:53:50 +08:00
parent 6747205bd0
commit 42850c4460
12 changed files with 572 additions and 66 deletions
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,6 @@
 import React, { useEffect, useState, useRef, useCallback } from 'react';
 import { useAuth } from './contexts/AuthContext';
+import { useLanguage } from './contexts/LanguageContext';
 import { uploadService } from './lib/uploadService';
 import { FileRecord, RecognitionResult } from './types';
 import { TaskStatus, TaskHistoryItem } from './types/api';
@@ -8,15 +9,18 @@ import Navbar from './components/Navbar';
 import FilePreview from './components/FilePreview';
 import ResultPanel from './components/ResultPanel';
 import UploadModal from './components/UploadModal';
+import UserGuide from './components/UserGuide';

 const PAGE_SIZE = 6;

 function App() {
  const { user, initializing } = useAuth();
+  const { t } = useLanguage();
  const [files, setFiles] = useState<FileRecord[]>([]);
  const [selectedFileId, setSelectedFileId] = useState<string | null>(null);
  const [selectedResult, setSelectedResult] = useState<RecognitionResult | null>(null);
  const [showUploadModal, setShowUploadModal] = useState(false);
+  const [showUserGuide, setShowUserGuide] = useState(false);
  const [loading, setLoading] = useState(false);

  // Pagination state
@@ -41,6 +45,20 @@ function App() {

  const selectedFile = files.find((f) => f.id === selectedFileId) || null;

+  useEffect(() => {
+    const handleStartGuide = () => setShowUserGuide(true);
+    window.addEventListener('start-user-guide', handleStartGuide);
+
+    // Check for first-time user
+    const hasSeenGuide = localStorage.getItem('hasSeenGuide');
+    if (!hasSeenGuide) {
+      setTimeout(() => setShowUserGuide(true), 1500);
+      localStorage.setItem('hasSeenGuide', 'true');
+    }
+
+    return () => window.removeEventListener('start-user-guide', handleStartGuide);
+  }, []);
+
  useEffect(() => {
    if (!initializing && user && !hasLoadedFiles.current) {
      hasLoadedFiles.current = true;
@@ -352,7 +370,7 @@ function App() {
            return f;
          }));

-          alert('Task timeout: Recognition took too long.');
+          alert(t.alerts.taskTimeout);
        }

      } catch (error) {
@@ -366,7 +384,7 @@ function App() {
            if (f.id === fileId) return { ...f, status: 'failed' };
            return f;
          }));
-          alert('Task timeout or network error.');
+          alert(t.alerts.networkError);
        }
      }
    }, 2000); // Poll every 2 seconds
@@ -415,7 +433,7 @@ function App() {
      }
    } catch (error) {
      console.error('Error uploading files:', error);
-      alert('Upload failed: ' + (error instanceof Error ? error.message : 'Unknown error'));
+      alert(`${t.alerts.uploadFailed}: ` + (error instanceof Error ? error.message : 'Unknown error'));
    } finally {
      setLoading(false);
    }
@@ -426,7 +444,7 @@ function App() {
      <div className="min-h-screen bg-gray-50 flex items-center justify-center">
        <div className="text-center">
          <div className="w-16 h-16 border-4 border-blue-600 border-t-transparent rounded-full animate-spin mx-auto mb-4"></div>
-          <p className="text-gray-600">Loading...</p>
+          <p className="text-gray-600">{t.common.loading}</p>
        </div>
      </div>
    );
@@ -484,11 +502,16 @@ function App() {
          />
        )}

+        <UserGuide
+          isOpen={showUserGuide}
+          onClose={() => setShowUserGuide(false)}
+        />
+
        {loading && (
          <div className="fixed inset-0 bg-black bg-opacity-30 flex items-center justify-center z-50">
            <div className="bg-white rounded-xl shadow-xl p-8">
              <div className="w-16 h-16 border-4 border-blue-600 border-t-transparent rounded-full animate-spin mx-auto mb-4"></div>
-              <p className="text-gray-900 font-medium">Processing...</p>
+              <p className="text-gray-900 font-medium">{t.common.processing}</p>
            </div>
          </div>
        )}
--- a/src/components/AuthModal.tsx
+++ b/src/components/AuthModal.tsx
@@ -1,6 +1,7 @@
 import { useState } from 'react';
 import { X } from 'lucide-react';
 import { useAuth } from '../contexts/AuthContext';
+import { useLanguage } from '../contexts/LanguageContext';

 interface AuthModalProps {
  onClose: () => void;
@@ -8,6 +9,7 @@ interface AuthModalProps {

 export default function AuthModal({ onClose }: AuthModalProps) {
  const { signIn, signUp } = useAuth();
+  const { t } = useLanguage();
  const [isSignUp, setIsSignUp] = useState(false);
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
@@ -41,7 +43,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {
      <div className="bg-white rounded-xl shadow-xl max-w-md w-full p-6">
        <div className="flex justify-between items-center mb-6">
          <h2 className="text-2xl font-bold text-gray-900">
-            {isSignUp ? '注册账号' : '登录账号'}
+            {isSignUp ? t.auth.signUpTitle : t.auth.signInTitle}
          </h2>
          <button
            onClick={onClose}
@@ -54,7 +56,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {
        <form onSubmit={handleSubmit} className="space-y-4">
          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
-              邮箱
+              {t.auth.email}
            </label>
            <input
              type="email"
@@ -68,7 +70,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {

          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
-              密码
+              {t.auth.password}
            </label>
            <input
              type="password"
@@ -83,7 +85,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {

          {error && (
            <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded-lg text-sm font-medium animate-pulse">
-              错误: {error}
+              {t.auth.error}: {error}
            </div>
          )}

@@ -92,7 +94,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {
            disabled={loading}
            className="w-full py-3 px-4 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors font-medium disabled:opacity-80 disabled:cursor-wait"
          >
-            {isSignUp ? '注册' : '登录'}
+            {isSignUp ? t.auth.signUp : t.auth.signIn}
          </button>
        </form>

@@ -101,7 +103,7 @@ export default function AuthModal({ onClose }: AuthModalProps) {
            onClick={() => setIsSignUp(!isSignUp)}
            className="text-sm text-blue-600 hover:text-blue-700"
          >
-            {isSignUp ? '已有账号？去登录' : '没有账号？去注册'}
+            {isSignUp ? t.auth.hasAccount : t.auth.noAccount}
          </button>
        </div>
      </div>
--- a/src/components/ExportSidebar.tsx
+++ b/src/components/ExportSidebar.tsx
@@ -5,6 +5,7 @@ import { convertMathmlToOmml, wrapOmmlForClipboard } from '../lib/ommlConverter'
 import { generateImageFromElement, copyImageToClipboard, downloadImage } from '../lib/imageGenerator';
 import { API_BASE_URL } from '../config/env';
 import { tokenManager } from '../lib/api';
+import { useLanguage } from '../contexts/LanguageContext';

 interface ExportSidebarProps {
  isOpen: boolean;
@@ -24,6 +25,7 @@ interface ExportOption {
 }

 export default function ExportSidebar({ isOpen, onClose, result }: ExportSidebarProps) {
+  const { t } = useLanguage();
  const [copiedId, setCopiedId] = useState<string | null>(null);
  const [exportingId, setExportingId] = useState<string | null>(null);

@@ -127,7 +129,7 @@ export default function ExportSidebar({ isOpen, onClose, result }: ExportSidebar
      }, 1000);
    } catch (err) {
      console.error('Export failed:', err);
-      alert('导出失败，请重试');
+      alert(t.export.failed);
    } finally {
      setExportingId(null);
    }
@@ -160,7 +162,7 @@ export default function ExportSidebar({ isOpen, onClose, result }: ExportSidebar
      }, 1000);
    } catch (err) {
      console.error('Failed to generate image:', err);
-      alert(`生成图片失败: ${err}`);
+      alert(`${t.export.imageFailed}: ${err}`);
    } finally {
      setExportingId(null);
    }
@@ -228,9 +230,9 @@ export default function ExportSidebar({ isOpen, onClose, result }: ExportSidebar
  };

  const categories: { id: ExportCategory; icon: LucideIcon; label: string }[] = [
-    { id: 'Code', icon: Code2, label: 'Code' },
-    { id: 'Image', icon: ImageIcon, label: 'Image' },
-    { id: 'File', icon: FileText, label: 'File' },
+    { id: 'Code', icon: Code2, label: t.export.categories.code },
+    { id: 'Image', icon: ImageIcon, label: t.export.categories.image },
+    { id: 'File', icon: FileText, label: t.export.categories.file },
  ];

  return (
@@ -251,7 +253,7 @@ export default function ExportSidebar({ isOpen, onClose, result }: ExportSidebar
        `}
      >
        <div className="flex items-center justify-between px-6 py-5 border-b border-gray-100 shrink-0">
-          <h2 className="text-lg font-bold text-gray-900">Export</h2>
+          <h2 className="text-lg font-bold text-gray-900">{t.export.title}</h2>
          <button onClick={onClose} className="p-2 hover:bg-gray-100 rounded-full transition-colors">
            <X size={20} className="text-gray-500" />
          </button>
--- a/src/components/FilePreview.tsx
+++ b/src/components/FilePreview.tsx
@@ -1,12 +1,14 @@
 import { useState } from 'react';
 import { ChevronLeft, ChevronRight, File as FileIcon, MinusCircle, PlusCircle } from 'lucide-react';
 import { FileRecord } from '../types';
+import { useLanguage } from '../contexts/LanguageContext';

 interface FilePreviewProps {
  file: FileRecord | null;
 }

 export default function FilePreview({ file }: FilePreviewProps) {
+  const { t } = useLanguage();
  const [zoom, setZoom] = useState(100);
  const [page, setPage] = useState(1);
  const totalPages = 1;
@@ -16,13 +18,13 @@ export default function FilePreview({ file }: FilePreviewProps) {

  if (!file) {
    return (
-      <div className="flex-1 flex flex-col items-center justify-center bg-white p-8 text-center border border-white border-solid">
+      <div className="flex-1 flex flex-col items-center justify-center bg-white p-8 text-center border border-white border-solid" id="file-preview-empty">
        <div className="w-32 h-32 bg-gray-100 rounded-full flex items-center justify-center mb-6 shadow-inner">
          <FileIcon size={48} className="text-gray-900" />
        </div>
-        <h3 className="text-xl font-semibold text-gray-900 mb-2">Upload file</h3>
+        <h3 className="text-xl font-semibold text-gray-900 mb-2">{t.common.upload}</h3>
        <p className="text-gray-500 max-w-xs">
-          Click, Drop, or Paste a file to start parsing
+          {t.sidebar.uploadInstruction}
        </p>
      </div>
    );
@@ -68,7 +70,7 @@ export default function FilePreview({ file }: FilePreviewProps) {
            <button
              onClick={handleZoomOut}
              className="p-1 hover:bg-white hover:shadow-sm rounded-md text-gray-500 transition-all"
-              title="缩小"
+              title={t.common.preview}
            >
              <MinusCircle size={16} />
            </button>
@@ -78,7 +80,7 @@ export default function FilePreview({ file }: FilePreviewProps) {
            <button
              onClick={handleZoomIn}
              className="p-1 hover:bg-white hover:shadow-sm rounded-md text-gray-500 transition-all"
-              title="放大"
+              title={t.common.preview}
            >
              <PlusCircle size={16} />
            </button>
--- a/src/components/LeftSidebar.tsx
+++ b/src/components/LeftSidebar.tsx
@@ -1,6 +1,7 @@
 import React, { useState, useRef, useCallback, useEffect } from 'react';
 import { Upload, LogIn, LogOut, FileText, Clock, ChevronLeft, ChevronRight, Settings, History, MousePointerClick, FileUp, ClipboardPaste, Loader2 } from 'lucide-react';
 import { useAuth } from '../contexts/AuthContext';
+import { useLanguage } from '../contexts/LanguageContext';
 import { FileRecord } from '../types';
 import AuthModal from './AuthModal';

@@ -30,11 +31,13 @@ export default function LeftSidebar({
  onLoadMore,
 }: LeftSidebarProps) {
  const { user, signOut } = useAuth();
+  const { t } = useLanguage();
  const [showAuthModal, setShowAuthModal] = useState(false);
  const [isDragging, setIsDragging] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);
  const listRef = useRef<HTMLDivElement>(null);

+  // ... (rest of the logic remains the same)
  // Handle scroll to load more
  const handleScroll = useCallback(() => {
    if (!listRef.current || loadingMore || !hasMore) return;
@@ -116,13 +119,13 @@ export default function LeftSidebar({
        <button
          onClick={onUploadClick}
          className="p-3 rounded-xl bg-blue-600 text-white hover:bg-blue-700 shadow-lg shadow-blue-600/20 transition-all mb-6"
-          title="Upload"
+          title={t.common.upload}
        >
          <Upload size={20} />
        </button>

        <div className="flex-1 w-full flex flex-col items-center gap-4">
-          <button className="p-2 text-gray-400 hover:text-gray-900 transition-colors" title="History">
+          <button className="p-2 text-gray-400 hover:text-gray-900 transition-colors" title={t.common.history}>
            <History size={20} />
          </button>
        </div>
@@ -130,7 +133,7 @@ export default function LeftSidebar({
        <button
          onClick={() => !user && setShowAuthModal(true)}
          className="p-3 rounded-lg text-gray-600 hover:bg-gray-200 transition-colors mt-auto"
-          title={user ? 'Signed In' : 'Sign In'}
+          title={user ? 'Signed In' : t.common.login}
        >
          <LogIn size={20} />
        </button>
@@ -145,8 +148,8 @@ export default function LeftSidebar({
        <div className="p-6 pb-4">
          <div className="flex items-start justify-between mb-6">
            <div>
-              <h2 className="text-lg font-bold text-gray-900 leading-tight">Formula Recognize</h2>
-              <p className="text-xs text-gray-500 mt-1">Support handwriting and printed formulas</p>
+              <h2 className="text-lg font-bold text-gray-900 leading-tight">{t.sidebar.title}</h2>
+              <p className="text-xs text-gray-500 mt-1">{t.sidebar.subtitle}</p>
            </div>
            <button
              onClick={onToggleCollapse}
@@ -156,7 +159,7 @@ export default function LeftSidebar({
            </button>
          </div>

-          <div className="mb-2">
+          <div className="mb-2" id="sidebar-upload-area">
            <div
              onDragOver={handleDragOver}
              onDragLeave={handleDragLeave}
@@ -181,18 +184,19 @@ export default function LeftSidebar({
              <div className="w-12 h-12 bg-gray-100 text-gray-600 rounded-full flex items-center justify-center mx-auto mb-3 group-hover:scale-110 transition-transform">
                <Upload size={24} />
              </div>
-              <div className="flex items-center justify-center gap-4 mt-2 text-xs text-gray-400">
+              <p className="text-xs text-gray-500 mb-2">{t.sidebar.uploadInstruction}</p>
+              <div className="flex items-center justify-center gap-4 text-xs text-gray-400">
                <div className="flex items-center gap-1">
                  <MousePointerClick className="w-3.5 h-3.5" />
-                  <span>Click</span>
+                  <span>{t.common.click}</span>
                </div>
                <div className="flex items-center gap-1">
                  <FileUp className="w-3.5 h-3.5" />
-                  <span>Drop</span>
+                  <span>{t.common.drop}</span>
                </div>
                <div className="flex items-center gap-1">
                  <ClipboardPaste className="w-3.5 h-3.5" />
-                  <span>Paste</span>
+                  <span>{t.common.paste}</span>
                </div>
              </div>
            </div>
@@ -200,10 +204,10 @@ export default function LeftSidebar({
        </div>

        {/* Middle Area: History */}
-        <div className="flex-1 overflow-hidden flex flex-col px-4">
+        <div className="flex-1 overflow-hidden flex flex-col px-4" id="sidebar-history">
          <div className="flex items-center gap-2 text-xs font-semibold text-gray-500 uppercase tracking-wider mb-3 px-2">
            <Clock size={14} />
-            <span>History</span>
+            <span>{t.sidebar.historyHeader}</span>
          </div>

          <div
@@ -214,12 +218,12 @@ export default function LeftSidebar({
            {!user ? (
              <div className="text-center py-12 text-gray-400 text-sm">
                <div className="mb-2 opacity-50"><FileText size={40} className="mx-auto" /></div>
-                Please login to view history
+                {t.sidebar.pleaseLogin}
              </div>
            ) : files.length === 0 ? (
              <div className="text-center py-12 text-gray-400 text-sm">
                <div className="mb-2 opacity-50"><FileText size={40} className="mx-auto" /></div>
-                No history records
+                {t.sidebar.noHistory}
              </div>
            ) : (
              <>
@@ -256,13 +260,13 @@ export default function LeftSidebar({
                {loadingMore && (
                  <div className="flex items-center justify-center py-3 text-gray-400">
                    <Loader2 size={18} className="animate-spin" />
-                    <span className="ml-2 text-xs">Loading...</span>
+                    <span className="ml-2 text-xs">{t.common.loading}</span>
                  </div>
                )}
                {/* End of list indicator */}
                {!hasMore && files.length > 0 && (
                  <div className="text-center py-3 text-xs text-gray-400">
-                    No more records
+                    {t.sidebar.noMore}
                  </div>
                )}
              </>
@@ -285,7 +289,7 @@ export default function LeftSidebar({
              <button
                onClick={() => signOut()}
                className="p-1.5 text-gray-400 hover:text-red-500 hover:bg-red-50 rounded-md transition-colors"
-                title="Logout"
+                title={t.common.logout}
              >
                <LogOut size={16} />
              </button>
@@ -296,7 +300,7 @@ export default function LeftSidebar({
              className="w-full py-2.5 px-4 bg-gray-900 text-white rounded-lg hover:bg-gray-800 transition-colors flex items-center justify-center gap-2 text-sm font-medium shadow-lg shadow-gray-900/10"
            >
              <LogIn size={18} />
-              Login / Register
+              {t.common.login}
            </button>
          )}
        </div>
--- a/src/components/Navbar.tsx
+++ b/src/components/Navbar.tsx
@@ -1,11 +1,15 @@
 import { useState, useRef, useEffect } from 'react';
-import { Mail, Users, MessageCircle, ChevronDown, Check, Heart, X } from 'lucide-react';
+import { Mail, Users, MessageCircle, ChevronDown, Check, Heart, X, Languages, HelpCircle } from 'lucide-react';
+import { useLanguage } from '../contexts/LanguageContext';

 export default function Navbar() {
+  const { language, setLanguage, t } = useLanguage();
  const [showContact, setShowContact] = useState(false);
  const [showReward, setShowReward] = useState(false);
+  const [showLangMenu, setShowLangMenu] = useState(false);
  const [copied, setCopied] = useState(false);
  const dropdownRef = useRef<HTMLDivElement>(null);
+  const langMenuRef = useRef<HTMLDivElement>(null);

  const handleCopyQQ = async () => {
    await navigator.clipboard.writeText('1018282100');
@@ -19,6 +23,9 @@ export default function Navbar() {
      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
        setShowContact(false);
      }
+      if (langMenuRef.current && !langMenuRef.current.contains(event.target as Node)) {
+        setShowLangMenu(false);
+      }
    };

    document.addEventListener('mousedown', handleClickOutside);
@@ -37,8 +44,59 @@ export default function Navbar() {
        </span>
      </div>

-      {/* Right: Reward & Contact Buttons */}
+      {/* Right: Actions */}
      <div className="flex items-center gap-3">
+        {/* Language Switcher */}
+        <div className="relative" ref={langMenuRef}>
+          <button
+            onClick={() => setShowLangMenu(!showLangMenu)}
+            className="flex items-center gap-2 px-3 py-2 hover:bg-gray-100 rounded-lg text-gray-700 text-sm font-medium transition-colors"
+            title="Switch Language"
+          >
+            <Languages size={18} />
+            <span className="hidden sm:inline">{language === 'en' ? 'English' : '简体中文'}</span>
+            <ChevronDown size={14} className={`transition-transform duration-200 ${showLangMenu ? 'rotate-180' : ''}`} />
+          </button>
+
+          {showLangMenu && (
+            <div className="absolute right-0 top-full mt-2 w-32 bg-white rounded-xl shadow-lg border border-gray-200 py-1 z-50 animate-in fade-in slide-in-from-top-2 duration-200">
+              <button
+                onClick={() => {
+                  setLanguage('en');
+                  setShowLangMenu(false);
+                }}
+                className={`w-full flex items-center justify-between px-4 py-2 text-sm transition-colors hover:bg-gray-50 ${language === 'en' ? 'text-blue-600 font-medium' : 'text-gray-700'}`}
+              >
+                English
+                {language === 'en' && <Check size={14} />}
+              </button>
+              <button
+                onClick={() => {
+                  setLanguage('zh');
+                  setShowLangMenu(false);
+                }}
+                className={`w-full flex items-center justify-between px-4 py-2 text-sm transition-colors hover:bg-gray-50 ${language === 'zh' ? 'text-blue-600 font-medium' : 'text-gray-700'}`}
+              >
+                简体中文
+                {language === 'zh' && <Check size={14} />}
+              </button>
+            </div>
+          )}
+        </div>
+
+        {/* User Guide Button */}
+        <button
+          id="guide-button"
+          className="flex items-center gap-2 px-3 py-2 hover:bg-gray-100 rounded-lg text-gray-700 text-sm font-medium transition-colors"
+          onClick={() => {
+            // This will be handled in App.tsx via a custom event or shared state
+            window.dispatchEvent(new CustomEvent('start-user-guide'));
+          }}
+        >
+          <HelpCircle size={18} />
+          <span className="hidden sm:inline">{t.common.guide}</span>
+        </button>
+
        {/* Reward Button */}
        <div className="relative">
          <button
@@ -46,7 +104,7 @@ export default function Navbar() {
            className="flex items-center gap-2 px-4 py-2 bg-gradient-to-r from-rose-500 to-pink-500 hover:from-rose-600 hover:to-pink-600 rounded-lg text-white text-sm font-medium transition-all shadow-sm hover:shadow-md"
          >
            <Heart size={14} className="fill-white" />
-            <span>赞赏</span>
+            <span>{t.common.reward}</span>
          </button>

          {/* Reward Modal */}
@@ -60,7 +118,7 @@ export default function Navbar() {
                onClick={e => e.stopPropagation()}
              >
                <div className="flex items-center justify-between mb-4">
-                  <span className="text-lg font-bold text-gray-900">微信赞赏码</span>
+                  <span className="text-lg font-bold text-gray-900">{t.navbar.rewardTitle}</span>
                  <button
                    onClick={() => setShowReward(false)}
                    className="p-2 hover:bg-gray-100 rounded-lg transition-colors"
@@ -71,12 +129,12 @@ export default function Navbar() {
                <div className="flex flex-col items-center">
                  <img
                    src="https://cdn.texpixel.com/public/rewardcode.png"
-                    alt="微信赞赏码"
+                    alt={t.navbar.rewardTitle}
                    className="w-64 h-64 object-contain rounded-lg shadow-sm"
                  />
                  <p className="text-sm text-gray-500 text-center mt-4">
-                    感谢您的支持与鼓励 ❤️<br />
-                    <span className="text-xs text-gray-400 mt-1 block">您的支持是我们持续更新的动力</span>
+                    {t.navbar.rewardThanks}<br />
+                    <span className="text-xs text-gray-400 mt-1 block">{t.navbar.rewardSubtitle}</span>
                  </p>
                </div>
              </div>
@@ -91,7 +149,7 @@ export default function Navbar() {
            className="flex items-center gap-2 px-4 py-2 bg-gray-100 hover:bg-gray-200 rounded-lg text-gray-700 text-sm font-medium transition-colors"
          >
            <MessageCircle size={14} />
-            <span>Contact Us</span>
+            <span>{t.common.contactUs}</span>
            <ChevronDown
              size={14}
              className={`transition-transform duration-200 ${showContact ? 'rotate-180' : ''}`}
@@ -109,7 +167,7 @@ export default function Navbar() {
                  <Mail size={16} className="text-blue-600" />
                </div>
                <div>
-                  <div className="text-xs text-gray-500">Email</div>
+                  <div className="text-xs text-gray-500">{t.common.email}</div>
                  <div className="text-sm font-medium text-gray-900">yogecoder@gmail.com</div>
                </div>
              </a>
@@ -126,7 +184,7 @@ export default function Navbar() {
                </div>
                <div>
                  <div className={`text-xs transition-colors ${copied ? 'text-green-600 font-medium' : 'text-gray-500'}`}>
-                    {copied ? 'Copied!' : 'QQ Group (Click to Copy)'}
+                    {copied ? t.common.copied : t.common.qqGroup}
                  </div>
                  <div className="text-sm font-medium text-gray-900">1018282100</div>
                </div>
--- a/src/components/ResultPanel.tsx
+++ b/src/components/ResultPanel.tsx
@@ -7,6 +7,7 @@ import rehypeKatex from 'rehype-katex';
 import 'katex/dist/katex.min.css';
 import { RecognitionResult } from '../types';
 import ExportSidebar from './ExportSidebar';
+import { useLanguage } from '../contexts/LanguageContext';

 interface ResultPanelProps {
  result: RecognitionResult | null;
@@ -67,6 +68,7 @@ function preprocessLatex(content: string): string {
 }

 export default function ResultPanel({ result, fileStatus }: ResultPanelProps) {
+  const { t } = useLanguage();
  const [isExportSidebarOpen, setIsExportSidebarOpen] = useState(false);

  if (!result) {
@@ -75,44 +77,45 @@ export default function ResultPanel({ result, fileStatus }: ResultPanelProps) {
        <div className="h-full flex flex-col items-center justify-center bg-white text-center p-8">
          <div className="w-16 h-16 border-4 border-blue-600 border-t-transparent rounded-full animate-spin mb-6"></div>
          <h3 className="text-xl font-semibold text-gray-900 mb-2">
-            {fileStatus === 'pending' ? 'Waiting in queue...' : 'Analyzing...'}
+            {fileStatus === 'pending' ? t.resultPanel.waitingQueue : t.resultPanel.analyzing}
          </h3>
          <p className="text-gray-500 max-w-sm">
            {fileStatus === 'pending'
-              ? 'Your file is in the queue, please wait.'
-              : 'Texpixel is processing your file, this may take a moment.'}
+              ? t.resultPanel.queueSubtitle
+              : t.resultPanel.processingSubtitle}
          </p>
        </div>
      );
    }

    return (
-      <div className="h-full flex flex-col items-center justify-center bg-white text-center p-8">
+      <div className="h-full flex flex-col items-center justify-center bg-white text-center p-8" id="result-empty-state">
        <div className="w-32 h-32 bg-gray-100 rounded-full flex items-center justify-center mb-6 shadow-inner">
          <Code2 size={48} className="text-gray-900" />
        </div>
-        <h3 className="text-xl font-semibold text-gray-900 mb-2">Waiting for recognition result</h3>
+        <h3 className="text-xl font-semibold text-gray-900 mb-2">{t.resultPanel.waitingTitle}</h3>
        <p className="text-gray-500 max-w-sm">
-          After uploading the file, Texpixel will automatically recognize and display the result here
+          {t.resultPanel.waitingSubtitle}
        </p>
      </div>
    );
  }

  return (
-    <div className="flex flex-col h-full bg-white relative overflow-hidden">
+    <div className="flex flex-col h-full bg-white relative overflow-hidden" id="result-panel-content">
      {/* Top Header */}
      <div className="h-16 px-6 border-b border-gray-200 flex items-center justify-between bg-white shrink-0 z-10">
        <div className="flex items-center gap-4">
-          <h2 className="text-lg font-bold text-gray-900">Markdown</h2>
+          <h2 className="text-lg font-bold text-gray-900">{t.resultPanel.markdown}</h2>
        </div>

        <button
+          id="export-button"
          onClick={() => setIsExportSidebarOpen(true)}
          className={`px-4 py-2 bg-gray-900 text-white text-sm font-medium rounded-lg hover:bg-gray-800 transition-colors flex items-center gap-2 shadow-sm ${isExportSidebarOpen ? 'opacity-0 pointer-events-none' : ''}`}
        >
          <Download size={16} />
-          Export
+          {t.common.export}
        </button>
      </div>

--- a/src/components/UploadModal.tsx
+++ b/src/components/UploadModal.tsx
@@ -1,5 +1,6 @@
 import { useCallback, useState, useEffect, useRef } from 'react';
 import { Upload, X, MousePointerClick, FileUp, ClipboardPaste } from 'lucide-react';
+import { useLanguage } from '../contexts/LanguageContext';

 interface UploadModalProps {
  onClose: () => void;
@@ -7,6 +8,7 @@ interface UploadModalProps {
 }

 export default function UploadModal({ onClose, onUpload }: UploadModalProps) {
+  const { t } = useLanguage();
  const [dragActive, setDragActive] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);

@@ -75,7 +77,7 @@ export default function UploadModal({ onClose, onUpload }: UploadModalProps) {
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4">
      <div className="bg-white rounded-xl shadow-xl max-w-2xl w-full p-6">
        <div className="flex justify-between items-center mb-6">
-          <h2 className="text-2xl font-bold text-gray-900">上传文件</h2>
+          <h2 className="text-2xl font-bold text-gray-900">{t.uploadModal.title}</h2>
          <button
            onClick={onClose}
            className="p-2 hover:bg-gray-100 rounded-lg transition-colors"
@@ -99,6 +101,7 @@ export default function UploadModal({ onClose, onUpload }: UploadModalProps) {
            <Upload size={32} />
          </div>

+          <p className="text-sm text-gray-600 mb-1">{t.sidebar.uploadInstruction}</p>
          <input
            ref={fileInputRef}
            type="file"
@@ -108,22 +111,22 @@ export default function UploadModal({ onClose, onUpload }: UploadModalProps) {
            className="hidden"
          />

-          <p className="text-xs text-gray-500 mt-4">
-            Support JPG, PNG format
+          <p className="text-xs text-gray-500 mb-4">
+            {t.uploadModal.supportFormats}
          </p>

          <div className="flex items-center justify-center gap-4 mt-6 text-xs text-gray-400">
            <div className="flex items-center gap-1">
              <MousePointerClick className="w-3.5 h-3.5" />
-              <span>Click</span>
+              <span>{t.common.click}</span>
            </div>
            <div className="flex items-center gap-1">
              <FileUp className="w-3.5 h-3.5" />
-              <span>Drop</span>
+              <span>{t.common.drop}</span>
            </div>
            <div className="flex items-center gap-1">
              <ClipboardPaste className="w-3.5 h-3.5" />
-              <span>Paste</span>
+              <span>{t.common.paste}</span>
            </div>
          </div>
        </div>
--- a/src/components/UserGuide.tsx
+++ b/src/components/UserGuide.tsx
@@ -0,0 +1,174 @@
+import React, { useState, useEffect, useCallback } from 'react';
+import { X, ChevronRight, ChevronLeft } from 'lucide-react';
+import { useLanguage } from '../contexts/LanguageContext';
+
+interface Step {
+  id: string;
+  title: string;
+  content: string;
+  position: 'top' | 'bottom' | 'left' | 'right';
+}
+
+export default function UserGuide({ isOpen, onClose }: { isOpen: boolean; onClose: () => void }) {
+  const { t } = useLanguage();
+  const [currentStep, setCurrentStep] = useState(0);
+  const [highlightStyle, setHighlightStyle] = useState<React.CSSProperties>({});
+
+  const steps: Step[] = [
+    {
+      id: 'sidebar-upload-area',
+      title: t.guide.step1Title,
+      content: t.guide.step1Content,
+      position: 'right',
+    },
+    {
+      id: 'sidebar-history',
+      title: t.guide.step2Title,
+      content: t.guide.step2Content,
+      position: 'right',
+    },
+    {
+      id: 'file-preview-empty',
+      title: t.guide.step3Title,
+      content: t.guide.step3Content,
+      position: 'right',
+    },
+    {
+      id: 'result-empty-state',
+      title: t.guide.step4Title,
+      content: t.guide.step4Content,
+      position: 'left',
+    },
+    {
+      id: 'export-button',
+      title: t.guide.stepExportTitle,
+      content: t.guide.stepExportContent,
+      position: 'left',
+    },
+  ];
+
+  const updateHighlight = useCallback(() => {
+    if (!isOpen || steps.length === 0) return;
+
+    const element = document.getElementById(steps[currentStep].id);
+    if (element) {
+      const rect = element.getBoundingClientRect();
+      setHighlightStyle({
+        top: rect.top - 8,
+        left: rect.left - 8,
+        width: rect.width + 16,
+        height: rect.height + 16,
+        opacity: 1,
+      });
+      element.scrollIntoView({ behavior: 'smooth', block: 'center' });
+    } else {
+      setHighlightStyle({ opacity: 0 });
+    }
+  }, [currentStep, isOpen, steps, t.guide]);
+
+  useEffect(() => {
+    if (isOpen) {
+      updateHighlight();
+      window.addEventListener('resize', updateHighlight);
+    }
+    return () => window.removeEventListener('resize', updateHighlight);
+  }, [isOpen, updateHighlight]);
+
+  if (!isOpen) return null;
+
+  const handleNext = () => {
+    if (currentStep < steps.length - 1) {
+      setCurrentStep(currentStep + 1);
+    } else {
+      onClose();
+      setCurrentStep(0);
+    }
+  };
+
+  const handlePrev = () => {
+    if (currentStep > 0) {
+      setCurrentStep(currentStep - 1);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-[100] pointer-events-none">
+      {/* Backdrop with hole */}
+      <div className="absolute inset-0 bg-black/60 pointer-events-auto" onClick={onClose} style={{
+        clipPath: highlightStyle.top !== undefined ? `polygon(
+          0% 0%, 0% 100%, 
+          ${highlightStyle.left}px 100%, 
+          ${highlightStyle.left}px ${highlightStyle.top}px, 
+          ${(highlightStyle.left as number) + (highlightStyle.width as number)}px ${highlightStyle.top}px, 
+          ${(highlightStyle.left as number) + (highlightStyle.width as number)}px ${(highlightStyle.top as number) + (highlightStyle.height as number)}px, 
+          ${highlightStyle.left}px ${(highlightStyle.top as number) + (highlightStyle.height as number)}px, 
+          ${highlightStyle.left}px 100%, 
+          100% 100%, 100% 0%
+        )` : 'none'
+      }} />
+
+      {/* Highlight border */}
+      <div
+        className="absolute border-2 border-blue-500 rounded-xl transition-all duration-300 shadow-[0_0_0_9999px_rgba(0,0,0,0.5)]"
+        style={highlightStyle}
+      />
+
+      {/* Tooltip */}
+      <div
+        className="absolute pointer-events-auto bg-white rounded-xl shadow-2xl p-6 w-80 transition-all duration-300 animate-in fade-in zoom-in-95"
+        style={highlightStyle.top !== undefined ? {
+          top: steps[currentStep].position === 'bottom' 
+            ? (highlightStyle.top as number) + (highlightStyle.height as number) + 16 
+            : steps[currentStep].position === 'top'
+            ? (highlightStyle.top as number) - 200 // approximation
+            : (highlightStyle.top as number),
+          left: steps[currentStep].position === 'right'
+            ? (highlightStyle.left as number) + (highlightStyle.width as number) + 16
+            : steps[currentStep].position === 'left'
+            ? (highlightStyle.left as number) - 336
+            : (highlightStyle.left as number),
+        } : {
+          top: '50%',
+          left: '50%',
+          transform: 'translate(-50%, -50%)',
+        }}
+      >
+        <button
+          onClick={onClose}
+          className="absolute top-4 right-4 text-gray-400 hover:text-gray-600"
+        >
+          <X size={18} />
+        </button>
+        
+        <div className="mb-4">
+          <span className="text-xs font-bold text-blue-600 uppercase tracking-wider">
+            Step {currentStep + 1} of {steps.length}
+          </span>
+          <h3 className="text-lg font-bold text-gray-900 mt-1">{steps[currentStep].title}</h3>
+          <p className="text-sm text-gray-600 mt-2 leading-relaxed">
+            {steps[currentStep].content}
+          </p>
+        </div>
+
+        <div className="flex items-center justify-between mt-6">
+          <button
+            onClick={handlePrev}
+            disabled={currentStep === 0}
+            className={`flex items-center gap-1 text-sm font-medium ${currentStep === 0 ? 'text-gray-300 cursor-not-allowed' : 'text-gray-600 hover:text-gray-900'}`}
+          >
+            <ChevronLeft size={16} />
+            {t.guide.prev}
+          </button>
+          
+          <button
+            onClick={handleNext}
+            className="px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-lg hover:bg-blue-700 transition-colors flex items-center gap-1"
+          >
+            {currentStep === steps.length - 1 ? t.guide.finish : t.guide.next}
+            {currentStep < steps.length - 1 && <ChevronRight size={16} />}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/src/contexts/LanguageContext.tsx
+++ b/src/contexts/LanguageContext.tsx
@@ -0,0 +1,39 @@
+import React, { createContext, useContext, useState, useEffect } from 'react';
+import { translations, Language, TranslationKey } from '../lib/translations';
+
+interface LanguageContextType {
+  language: Language;
+  setLanguage: (lang: Language) => void;
+  t: TranslationKey;
+}
+
+const LanguageContext = createContext<LanguageContextType | undefined>(undefined);
+
+export const LanguageProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const [language, setLanguageState] = useState<Language>(() => {
+    const saved = localStorage.getItem('language');
+    if (saved === 'en' || saved === 'zh') return saved;
+    return navigator.language.startsWith('zh') ? 'zh' : 'en';
+  });
+
+  const setLanguage = (lang: Language) => {
+    setLanguageState(lang);
+    localStorage.setItem('language', lang);
+  };
+
+  const t = translations[language];
+
+  return (
+    <LanguageContext.Provider value={{ language, setLanguage, t }}>
+      {children}
+    </LanguageContext.Provider>
+  );
+};
+
+export const useLanguage = () => {
+  const context = useContext(LanguageContext);
+  if (context === undefined) {
+    throw new Error('useLanguage must be used within a LanguageProvider');
+  }
+  return context;
+};
--- a/src/lib/translations.ts
+++ b/src/lib/translations.ts
@@ -0,0 +1,193 @@
+export const translations = {
+  en: {
+    common: {
+      upload: 'Upload',
+      history: 'History',
+      login: 'Login / Register',
+      logout: 'Logout',
+      loading: 'Loading...',
+      processing: 'Processing...',
+      cancel: 'Cancel',
+      copy: 'Copy',
+      copied: 'Copied!',
+      download: 'Download',
+      export: 'Export',
+      preview: 'Preview',
+      email: 'Email',
+      contactUs: 'Contact Us',
+      reward: 'Reward',
+      qqGroup: 'QQ Group (Click to Copy)',
+      guide: 'User Guide',
+      click: 'Click',
+      drop: 'Drop',
+      paste: 'Paste',
+    },
+    navbar: {
+      rewardTitle: 'WeChat Reward',
+      rewardThanks: 'Thank you for your support and encouragement ❤️',
+      rewardSubtitle: 'Your support is our motivation for continuous updates',
+    },
+    sidebar: {
+      title: 'Formula Recognize',
+      subtitle: 'Support handwriting and printed formulas',
+      uploadInstruction: 'Click, Drop, or Paste a file to start parsing',
+      pleaseLogin: 'Please login to view history',
+      noHistory: 'No history records',
+      noMore: 'No more records',
+      historyHeader: 'History',
+    },
+    uploadModal: {
+      title: 'Upload File',
+      supportFormats: 'Support JPG, PNG, PDF format',
+    },
+    resultPanel: {
+      waitingTitle: 'Waiting for recognition result',
+      waitingSubtitle: 'After uploading the file, Texpixel will automatically recognize and display the result here',
+      analyzing: 'Analyzing...',
+      waitingQueue: 'Waiting in queue...',
+      queueSubtitle: 'Your file is in the queue, please wait.',
+      processingSubtitle: 'Texpixel is processing your file, this may take a moment.',
+      markdown: 'Markdown',
+    },
+    auth: {
+      signIn: 'Login',
+      signUp: 'Register',
+      signInTitle: 'Login Account',
+      signUpTitle: 'Register Account',
+      email: 'Email',
+      password: 'Password',
+      error: 'Error',
+      genericError: 'An error occurred, please try again',
+      hasAccount: 'Already have an account? Login',
+      noAccount: 'No account? Register',
+    },
+    export: {
+      title: 'Export',
+      categories: {
+        code: 'Code',
+        image: 'Image',
+        file: 'File',
+      },
+      failed: 'Export failed, please try again',
+      imageFailed: 'Failed to generate image',
+    },
+    guide: {
+      next: 'Next',
+      prev: 'Back',
+      finish: 'Finish',
+      skip: 'Skip',
+      step1Title: 'Upload Area',
+      step1Content: 'Click or drag and drop your formula images/PDFs here to start recognition.',
+      step2Title: 'File History',
+      step2Content: 'Your recognized files will appear here. Login to sync across devices.',
+      step3Title: 'Preview Area',
+      step3Content: 'The original file you uploaded will be displayed here for comparison.',
+      step4Title: 'Recognition Result',
+      step4Content: 'The recognition results (Markdown/LaTeX) will be shown here.',
+      stepExportTitle: 'Export Result',
+      stepExportContent: 'You can export the recognition results to various formats such as Markdown, LaTeX, Word, or Image.',
+    },
+    alerts: {
+      taskTimeout: 'Task timeout: Recognition took too long.',
+      networkError: 'Task timeout or network error.',
+      uploadFailed: 'Upload failed',
+    }
+  },
+  zh: {
+    common: {
+      upload: '上传',
+      history: '历史记录',
+      login: '登录 / 注册',
+      logout: '退出登录',
+      loading: '加载中...',
+      processing: '处理中...',
+      cancel: '取消',
+      copy: '复制',
+      copied: '已复制！',
+      download: '下载',
+      export: '导出',
+      preview: '预览',
+      email: '邮箱',
+      contactUs: '联系我们',
+      reward: '赞赏',
+      qqGroup: 'QQ 群 (点击复制)',
+      guide: '使用引导',
+      click: '点击',
+      drop: '拖拽',
+      paste: '粘贴',
+    },
+    navbar: {
+      rewardTitle: '微信赞赏码',
+      rewardThanks: '感谢您的支持与鼓励 ❤️',
+      rewardSubtitle: '您的支持是我们持续更新的动力',
+    },
+    sidebar: {
+      title: '文档识别',
+      subtitle: '支持手写和印刷体文档识别',
+      uploadInstruction: '点击、拖拽或粘贴文件开始解析',
+      pleaseLogin: '请登录后查看历史记录',
+      noHistory: '暂无历史记录',
+      noMore: '没有更多记录了',
+      historyHeader: '历史记录',
+    },
+    uploadModal: {
+      title: '上传文件',
+      supportFormats: '支持 JPG, PNG 格式',
+    },
+    resultPanel: {
+      waitingTitle: '等待识别结果',
+      waitingSubtitle: '上传文件后，TexPixel 将自动识别并在此显示结果',
+      analyzing: '解析中...',
+      waitingQueue: '排队中...',
+      queueSubtitle: '您的文件正在排队，请稍候。',
+      processingSubtitle: 'TexPixel 正在处理您的文件，请稍候。',
+      markdown: 'Markdown',
+    },
+    auth: {
+      signIn: '登录',
+      signUp: '注册',
+      signInTitle: '登录账号',
+      signUpTitle: '注册账号',
+      email: '邮箱',
+      password: '密码',
+      error: '错误',
+      genericError: '发生错误，请重试',
+      hasAccount: '已有账号？去登录',
+      noAccount: '没有账号？去注册',
+    },
+    export: {
+      title: '导出',
+      categories: {
+        code: '代码',
+        image: '图片',
+        file: '文件',
+      },
+      failed: '导出失败，请重试',
+      imageFailed: '生成图片失败',
+    },
+    guide: {
+      next: '下一步',
+      prev: '上一步',
+      finish: '完成',
+      skip: '跳过',
+      step1Title: '上传区域',
+      step1Content: '点击此处或将公式/文档图片 粘贴或者拖拽到这里开始识别。',
+      step2Title: '历史记录',
+      step2Content: '识别过的文件会显示在这里。登录后可以跨设备同步。',
+      step3Title: '预览区域',
+      step3Content: '这里会显示您上传的原始文件，方便对比。',
+      step4Title: '识别结果',
+      step4Content: '这里会显示识别出的 Markdown/LaTeX 结果。',
+      stepExportTitle: '导出结果',
+      stepExportContent: '您可以将识别结果导出为多种格式，如 Markdown、LaTeX、Word 或图片。',
+    },
+    alerts: {
+      taskTimeout: '任务超时：识别时间过长。',
+      networkError: '任务超时或网络错误。',
+      uploadFailed: '上传失败',
+    }
+  }
+};
+
+export type Language = 'en' | 'zh';
+export type TranslationKey = typeof translations.en;
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -3,11 +3,14 @@ import { createRoot } from 'react-dom/client';
 import App from './App.tsx';
 import './index.css';
 import { AuthProvider } from './contexts/AuthContext';
+import { LanguageProvider } from './contexts/LanguageContext';

 createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <AuthProvider>
-      <App />
+      <LanguageProvider>
+        <App />
+      </LanguageProvider>
    </AuthProvider>
  </StrictMode>
 );