Feat(frontend): navigation and registration page

frontend/src/components/AccountMenu.tsx

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+import axios from "axios";
+import Divider from "@mui/material/Divider";
+import IconButton from "@mui/material/IconButton";
+import Menu from "@mui/material/Menu";
+import MenuItem from "@mui/material/MenuItem";
+import AccountCircle from "@mui/icons-material/AccountCircle";
+import { useQueryClient } from "@tanstack/react-query";
+import React, { useContext, useState } from "react";
+import { Link } from "react-router-dom";
+
+import { AuthContext } from "src/AuthContext";
+import { useMutation } from "src/query";
+
+const useLogout = () => {
+  const { setAuthenticated } = useContext(AuthContext);
+  const queryClient = useQueryClient();
+  const { mutate: logout } = useMutation(
+    async () => await axios.delete("/sessions/"),
+    {
+      onSuccess: () => {
+        setAuthenticated(false);
+        queryClient.clear();
+      },
+    },
+  );
+  return logout;
+};
+
+const AccountMenu = () => {
+  const logout = useLogout();
+  const [anchorEl, setAnchorEl] = useState<null | HTMLElement>(null);
+
+  const onMenuOpen = (event: React.MouseEvent<HTMLElement>) =>
+    setAnchorEl(event.currentTarget);
+  const onMenuClose = () => setAnchorEl(null);
+
+  return (
+    <>
+      <IconButton color="inherit" onClick={onMenuOpen}>
+        <AccountCircle />
+      </IconButton>
+      <Menu
+        anchorEl={anchorEl}
+        anchorOrigin={{ horizontal: "right", vertical: "top" }}
+        keepMounted
+        onClose={onMenuClose}
+        open={Boolean(anchorEl)}
+        transformOrigin={{ horizontal: "right", vertical: "top" }}
+      >
+        <MenuItem component={Link} onClick={onMenuClose} to="/change-password/">
+          Change password
+        </MenuItem>
+        <Divider />
+        <MenuItem
+          onClick={() => {
+            logout();
+            onMenuClose();
+          }}
+        >
+          Logout
+        </MenuItem>
+      </Menu>
+    </>
+  );
+};
+
+export default AccountMenu;

frontend/src/components/TopBar.tsx

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+import AppBar from "@mui/material/AppBar";
+import Box from "@mui/material/Box";
+import Button from "@mui/material/Button";
+import Toolbar from "@mui/material/Toolbar";
+import React, { useContext } from "react";
+import { Link } from "react-router-dom";
+
+import { AuthContext } from "src/AuthContext";
+import AccountMenu from "src/components/AccountMenu";
+
+const sxToolbar = {
+  paddingLeft: "env(safe-area-inset-left)",
+  paddingRight: "env(safe-area-inset-right)",
+  paddingTop: "env(safe-area-inset-top)",
+};
+
+const TopBar = () => {
+  const { authenticated } = useContext(AuthContext);
+
+  return (
+    <>
+      <AppBar position="fixed">
+        <Toolbar sx={sxToolbar}>
+          <Box sx={{ flexGrow: 1 }}>
+            <Button color="inherit" component={Link} to="/">
+              Todo
+            </Button>
+          </Box>
+          {authenticated ? <AccountMenu /> : null}
+        </Toolbar>
+      </AppBar>
+      <Toolbar sx={{ ...sxToolbar, marginBottom: 2 }} />
+    </>
+  );
+};
+
+export default TopBar;