feat: initial commit - Go + CGO captcha recognition service

Features:
- Go + CGO ONNX/OpenCV wrapper for high performance
- SQLite (default) / MySQL database support
- Optional Redis caching
- JWT authentication system
- Multiple captcha recognition APIs:
  - OCR text recognition
  - Slider captcha matching
  - Image similarity comparison
  - Rotation captcha detection
  - Object detection
- React frontend with install wizard
- Docker and docker-compose support
- Gitea CI/CD pipeline

Project structure:
- cmd/server: Main entry point
- internal/: Core business logic
- pkg/onnx: ONNX Runtime CGO wrapper
- pkg/opencv: OpenCV CGO wrapper
- web/: React frontend
- deploy/: Deployment configs
- scripts/: Utility scripts

web/src/App.tsx

@@ -0,0 +1,49 @@
+import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom'
+import { useState, useEffect } from 'react'
+import LoginPage from './pages/Login'
+import RegisterPage from './pages/Register'
+import HomePage from './pages/Home'
+import AdminPage from './pages/Admin'
+import InstallPage from './pages/Install'
+
+function App() {
+  const [isInstalled, setIsInstalled] = useState<boolean | null>(null)
+  const [token, setToken] = useState<string | null>(localStorage.getItem('token'))
+
+  useEffect(() => {
+    // 检查是否已安装
+    fetch('/api/install/check')
+      .then(res => res.json())
+      .then(data => setIsInstalled(data.installed))
+      .catch(() => setIsInstalled(false))
+  }, [])
+
+  if (isInstalled === null) {
+    return <div className="container text-center">加载中...</div>
+  }
+
+  if (!isInstalled) {
+    return (
+      <BrowserRouter>
+        <Routes>
+          <Route path="/install" element={<InstallPage onInstall={() => setIsInstalled(true)} />} />
+          <Route path="*" element={<Navigate to="/install" replace />} />
+        </Routes>
+      </BrowserRouter>
+    )
+  }
+
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/login" element={<LoginPage onLogin={setToken} />} />
+        <Route path="/register" element={<RegisterPage />} />
+        <Route path="/" element={token ? <HomePage token={token} /> : <Navigate to="/login" />} />
+        <Route path="/admin" element={token ? <AdminPage token={token} /> : <Navigate to="/login" />} />
+        <Route path="*" element={<Navigate to="/" replace />} />
+      </Routes>
+    </BrowserRouter>
+  )
+}
+
+export default App