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feat: optimize SEO based on GSC data

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- Fix broken hreflang: /en/ ghost page removed, all hreflang point to canonical /
- Add canonical URL tag
- Remove emoji from page titles
- Rewrite title/description with target keywords (LaTeX OCR, math formula recognition, handwriting math)
- Add JSON-LD WebApplication structured data schema
- Update og:image to clean URL without OSS params, add og:image dimensions
- Fix favicon reference from vite.svg to favicon.png
- Add public/sitemap.xml with hreflang annotations
- Add public/robots.txt pointing to sitemap
- Update seoHelper.ts keywords for both zh/en to match search intent
- Add CLAUDE.md project documentation
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yoge
2026-03-24 23:50:12 +08:00
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commit 64e92c769d
5 changed files with 162 additions and 35 deletions
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# CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
## Commands
```bash
# Development server
npm run dev
# Build
npm run build # production
npm run build:dev # development build (VITE_ENV=development)
npm run build:prod # production build (VITE_ENV=production)
# Type checking
npm run typecheck
# Linting
npm run lint
# Unit tests (vitest)
npm run test # run once
npm run test:watch # watch mode
# E2E tests (playwright)
npm run test:e2e
```
To run a single unit test file:
```bash
npx vitest run src/components/__tests__/AuthModal.test.tsx
```
## Architecture
### Provider Tree
`main.tsx` wraps everything in: `BrowserRouter → AuthProvider → LanguageProvider → AppRouter`
### Routing
Only two routes (`src/routes/AppRouter.tsx`):
- `/` → `App` (main app)
- `/auth/google/callback` → `AuthCallbackPage` (Google OAuth callback handler)
### Auth System
- **`AuthContext.tsx`** — React context providing `signIn`, `signUp`, `beginGoogleOAuth`, `completeGoogleOAuth`, `signOut`. Uses `useReducer` with `authMachine.ts`.
- **`authMachine.ts`** — Pure reducer + state types (`AuthPhase`, `AuthState`, `AuthAction`). No side effects — all async logic lives in `AuthContext`.
- **`authService.ts`** — Calls backend API for login/register/Google OAuth/user info. Decodes JWT payload client-side to extract `UserInfo`. Handles session restore from `localStorage`.
- **`lib/api.ts`** — `http` client wrapper with `tokenManager` (stores JWT in `localStorage` under key `texpixel_token`). Adds `Authorization` header automatically. Throws `ApiError` for non-success business codes.
### Environment / API
- **`src/config/env.ts`** — Switches API base URL based on `VITE_ENV` env var:
- `development`: `https://cloud.texpixel.com:10443/doc_ai/v1`
- `production`: `https://api.texpixel.com/doc_ai/v1`
- The API uses a custom response envelope: `{ request_id, code, message, data }`. Success is `code === 200` (some endpoints also accept `0`).
### Main App Flow (`App.tsx`)
Three-panel layout: `LeftSidebar | FilePreview | ResultPanel`
Core data flow:
1. On auth, `loadFiles()` fetches paginated task history from `/task/list`
2. File upload goes: compute MD5 → get OSS pre-signed URL (`/oss/signature_url`) → PUT to OSS → create task (`/formula/recognition`) → poll every 2s for result
3. Results cached in `resultsCache` ref (keyed by `task_id`) to avoid redundant API calls
4. Guest users get 3 free uploads tracked via `localStorage` (`texpixel_guest_usage_count`)
### Internationalization
`LanguageContext.tsx` supports `en` / `zh`. Language is auto-detected via IP (`lib/ipLocation.ts`) on first visit, persisted to `localStorage` on manual switch. All UI strings come from `lib/translations.ts` via `const { t } = useLanguage()`.
### Key Type Definitions
- `src/types/api.ts` — All API request/response types, `TaskStatus` enum, `ApiErrorCode` enum, `ApiErrorMessages` map
- `src/types/index.ts` — Internal app types (`FileRecord`, `RecognitionResult`)
### Tests
- Unit tests: `src/components/__tests__/` and `src/contexts/__tests__/`, run with vitest + jsdom + `@testing-library/react`
- E2E tests: `e2e/` directory, run with Playwright
- Setup file: `src/test/setup.ts`

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<head> <head>
<meta charset="UTF-8" /> <meta charset="UTF-8" />
<link rel="icon" type="image/svg+xml" href="/vite.svg" /> <link rel="icon" type="image/png" href="/favicon.png" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" />
<!-- Multi-language Support -->
<link rel="alternate" hreflang="zh-CN" href="https://texpixel.com/" />
<link rel="alternate" hreflang="en" href="https://texpixel.com/en" />
<link rel="alternate" hreflang="x-default" href="https://texpixel.com/" />
<!-- Dynamic Title (will be updated by app) -->
<title>⚡️ TexPixel - 公式识别工具 | Formula Recognition Tool</title>
<!-- SEO Meta Tags - Chinese (Default) --> <!-- hreflang: same URL serves both languages (SPA), point both to canonical -->
<meta name="description" content="在线公式识别工具，支持印刷体和手写体数学公式识别，快速准确地将图片中的数学公式转换为可编辑文本。Online formula recognition tool supporting printed and handwritten math formulas." /> <link rel="canonical" href="https://texpixel.com/" />
<meta name="keywords" <link rel="alternate" hreflang="zh-CN" href="https://texpixel.com/" />
content="公式识别,数学公式,OCR,手写公式识别,印刷体识别,AI识别,数学工具,免费,formula recognition,math formula,handwriting recognition,latex,mathml,markdown,texpixel,TexPixel,混合文字识别,document recognition" /> <link rel="alternate" hreflang="en" href="https://texpixel.com/" />
<link rel="alternate" hreflang="x-default" href="https://texpixel.com/" />
<!-- Title -->
<title>TexPixel - AI Math Formula Recognition | LaTeX, MathML OCR Tool</title>
<!-- SEO Meta Tags -->
<meta name="description" content="Free AI-powered math formula recognition tool. Convert handwritten or printed math formulas in images to LaTeX, MathML, and Markdown instantly. Supports PDF and image files." />
<meta name="keywords" content="math formula recognition,LaTeX OCR,handwriting math recognition,formula to latex,math OCR,MathML converter,handwritten equation recognition,公式识别,数学公式OCR,手写公式识别,LaTeX转换,texpixel" />
<meta name="author" content="TexPixel Team" /> <meta name="author" content="TexPixel Team" />
<meta name="robots" content="index, follow" /> <meta name="robots" content="index, follow" />
<!-- Open Graph Meta Tags - Bilingual --> <!-- Open Graph -->
<meta property="og:title" content="TexPixel - 公式识别工具 | Formula Recognition Tool" /> <meta property="og:title" content="TexPixel - AI Math Formula Recognition Tool" />
<meta property="og:description" content="在线公式识别工具，支持印刷体和手写体数学公式识别。Online formula recognition tool supporting printed and handwritten math formulas." /> <meta property="og:description" content="Free AI-powered tool to convert handwritten or printed math formulas to LaTeX, MathML, and Markdown. Upload an image or PDF and get results instantly." />
<meta property="og:type" content="website" /> <meta property="og:type" content="website" />
<meta property="og:url" content="https://texpixel.com/" /> <meta property="og:url" content="https://texpixel.com/" />
<meta property="og:image" content="https://cdn.texpixel.com/public/logo.png?x-oss-process=image/resize,w_600" /> <meta property="og:image" content="https://cdn.texpixel.com/public/og-cover.png" />
<meta property="og:locale" content="zh_CN" /> <meta property="og:image:width" content="1200" />
<meta property="og:locale:alternate" content="en_US" /> <meta property="og:image:height" content="630" />
<meta property="og:locale" content="en_US" />
<meta property="og:locale:alternate" content="zh_CN" />
<meta property="og:site_name" content="TexPixel" /> <meta property="og:site_name" content="TexPixel" />
<!-- Twitter Card Meta Tags - Bilingual --> <!-- Twitter Card -->
<meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="TexPixel - Formula Recognition Tool | 公式识别工具" /> <meta name="twitter:title" content="TexPixel - AI Math Formula Recognition Tool" />
<meta name="twitter:description" content="Online formula recognition tool supporting printed and handwritten math formulas. 支持印刷体和手写体数学公式识别。" /> <meta name="twitter:description" content="Convert handwritten or printed math formulas to LaTeX, MathML, and Markdown for free. Upload image or PDF — results in seconds." />
<meta name="twitter:image" content="https://cdn.texpixel.com/public/logo.png?x-oss-process=image/resize,w_600" /> <meta name="twitter:image" content="https://cdn.texpixel.com/public/og-cover.png" />
<meta name="twitter:site" content="@TexPixel" /> <meta name="twitter:site" content="@TexPixel" />
<!-- Baidu Verification --> <!-- Baidu Verification -->
<meta name="baidu-site-verification" content="codeva-8zU93DeGgH" /> <meta name="baidu-site-verification" content="codeva-8zU93DeGgH" />
<!-- JSON-LD Structured Data -->
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "WebApplication",
"name": "TexPixel",
"url": "https://texpixel.com/",
"description": "AI-powered math formula recognition tool that converts handwritten or printed formulas in images to LaTeX, MathML, and Markdown.",
"applicationCategory": "UtilitiesApplication",
"operatingSystem": "Web",
"offers": {
"@type": "Offer",
"price": "0",
"priceCurrency": "USD"
},
"featureList": [
"Handwritten math formula recognition",
"Printed formula OCR",
"LaTeX output",
"MathML output",
"Markdown output",
"PDF support",
"Image support"
],
"inLanguage": ["en", "zh-CN"],
"publisher": {
"@type": "Organization",
"name": "TexPixel",
"url": "https://texpixel.com/"
}
}
</script>
<!-- Language Detection Script --> <!-- Language Detection Script -->
<script> <script>
// Update HTML lang attribute based on user preference or browser language
(function() { (function() {
const savedLang = localStorage.getItem('language'); const savedLang = localStorage.getItem('language');
const browserLang = navigator.language.toLowerCase(); const browserLang = navigator.language.toLowerCase();
const isZh = savedLang === 'zh' || (!savedLang && browserLang.startsWith('zh')); const isZh = savedLang === 'zh' || (!savedLang && browserLang.startsWith('zh'));
document.documentElement.lang = isZh ? 'zh-CN' : 'en'; document.documentElement.lang = isZh ? 'zh-CN' : 'en';
if (isZh) {
// Update page title based on language document.title = 'TexPixel - AI 数学公式识别工具 | LaTeX、MathML OCR';
if (!isZh) { document.querySelector('meta[name="description"]').setAttribute('content',
document.title = '⚡️ TexPixel - Formula Recognition Tool'; '免费 AI 数学公式识别工具，支持手写和印刷体公式识别，一键将图片或 PDF 中的数学公式转换为 LaTeX、MathML 和 Markdown 格式。');
} }
})(); })();
</script> </script>
@@ -64,4 +98,4 @@
<script type="module" src="/src/main.tsx"></script> <script type="module" src="/src/main.tsx"></script>
</body> </body>
</html> </html>

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User-agent: *
Allow: /
Sitemap: https://texpixel.com/sitemap.xml

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<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url>
<loc>https://texpixel.com/</loc>
<lastmod>2026-03-11</lastmod>
<changefreq>weekly</changefreq>
<priority>1.0</priority>
<xhtml:link rel="alternate" hreflang="zh-CN" href="https://texpixel.com/"/>
<xhtml:link rel="alternate" hreflang="en" href="https://texpixel.com/"/>
<xhtml:link rel="alternate" hreflang="x-default" href="https://texpixel.com/"/>
</url>
</urlset>

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src/lib/seoHelper.ts
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@@ -8,14 +8,14 @@ interface SEOContent {
const seoContent: Record<Language, SEOContent> = { const seoContent: Record<Language, SEOContent> = {
zh: { zh: {
title: '⚡️ TexPixel - 公式识别工具', title: 'TexPixel - AI 数学公式识别工具 | LaTeX、MathML OCR',
description: '在线公式识别工具，支持印刷体和手写体数学公式识别，快速准确地将图片中的数学公式转换为可编辑文本。', description: '免费 AI 数学公式识别工具，支持手写和印刷体公式识别，一键将图片或 PDF 中的数学公式转换为 LaTeX、MathML 和 Markdown 格式。',
keywords: '公式识别,数学公式,OCR,手写公式识别,印刷体识别,AI识别,数学工具,免费,混合文字识别,texpixel,TexPixel', keywords: '数学公式识别,LaTeX OCR,手写公式识别,公式转LaTeX,数学OCR,MathML转换,手写方程识别,公式识别,数学公式OCR,texpixel',
}, },
en: { en: {
title: '⚡️ TexPixel - Formula Recognition Tool', title: 'TexPixel - AI Math Formula Recognition | LaTeX, MathML OCR Tool',
description: 'Online formula recognition tool supporting printed and handwritten math formulas. Convert images to LaTeX, MathML, and Markdown quickly and accurately.', description: 'Free AI-powered math formula recognition tool. Convert handwritten or printed math formulas in images to LaTeX, MathML, and Markdown instantly. Supports PDF and image files.',
keywords: 'formula recognition,math formula,OCR,handwriting recognition,latex,mathml,markdown,AI recognition,math tool,free,texpixel,TexPixel,document recognition', keywords: 'math formula recognition,LaTeX OCR,handwriting math recognition,formula to latex,math OCR,MathML converter,handwritten equation recognition,texpixel',
}, },
}; };