branch setzen

src/Ap.xxx__tsx

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+import React from 'react';
+import {useContext} from 'react'
+import './App.css';
+import { BrowserRouter, Routes, Route, Navigate} from 'react-router-dom';
+import "./App.css";
+import Login from './components/Login';
+import Register from './components/Register';
+import Home from './components/Home';
+import Dog from './components/Dog';
+import {UserCtx, UserCtxT} from './context/UserContext';
+
+
+function App() 
+{
+  const {user} = useContext<UserCtxT | null>(UserCtx) as UserCtxT;
+
+  return (
+    <div className="App">
+          <div className="col middle">
+            <BrowserRouter basename='/dog'>
+              <Routes>
+                { user && <Route path="/" element={<Home/>} /> }
+                { (
+                  <>
+                  {/* <Route path="/:qr_id" element={<Dog/>} /> */}
+                  <Route path="/" element={<Home/>} />
+                  <Route path="/d" element={<Dog/>} />
+                  <Route path="/login" element={<Login/>} />
+                  <Route path="/reg" element={<Register/>} />
+                  </>
+                )}
+                {/* <Route path="*" element={<Navigate to={user ? '/':'/login'} />} /> */}
+              </Routes>
+            </BrowserRouter>
+          </div>
+    </div>
+  );
+}
+
+export default App;