feat: add login component and user config

Data/Server/WebUI/src/Login.jsx

@@ -0,0 +1,103 @@
+import React, { useState, useEffect } from "react";
+import { Box, TextField, Button, Typography } from "@mui/material";
+
+export default function Login({ onLogin }) {
+  const [users, setUsers] = useState([]);
+  const [username, setUsername] = useState("admin");
+  const [password, setPassword] = useState("");
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    fetch("/users.json")
+      .then((res) => res.json())
+      .then((data) => setUsers(data.users || []))
+      .catch(() => setUsers([]));
+  }, []);
+
+  const sha512 = async (text) => {
+    const encoder = new TextEncoder();
+    const data = encoder.encode(text);
+    const hashBuffer = await crypto.subtle.digest("SHA-512", data);
+    const hashArray = Array.from(new Uint8Array(hashBuffer));
+    return hashArray.map((b) => b.toString(16).padStart(2, "0")).join("");
+  };
+
+  const handleSubmit = async (e) => {
+    e.preventDefault();
+    const user = users.find((u) => u.username === username);
+    if (!user) {
+      setError("Invalid username or password");
+      return;
+    }
+    const hash = await sha512(password);
+    if (hash === user.password) {
+      setError("");
+      onLogin(username);
+    } else {
+      setError("Invalid username or password");
+    }
+  };
+
+  return (
+    <Box
+      sx={{
+        display: "flex",
+        justifyContent: "center",
+        alignItems: "center",
+        height: "100vh",
+        backgroundColor: "#2b2b2b",
+      }}
+    >
+      <Box
+        component="form"
+        onSubmit={handleSubmit}
+        sx={{
+          display: "flex",
+          flexDirection: "column",
+          alignItems: "center",
+          width: 300,
+        }}
+      >
+        <img
+          src="/Borealis_Logo.png"
+          alt="Borealis Logo"
+          style={{ width: "120px", marginBottom: "16px" }}
+        />
+        <Typography variant="h6" sx={{ mb: 3 }}>
+          Borealis - Automation Platform
+        </Typography>
+        <TextField
+          label="Username"
+          variant="outlined"
+          fullWidth
+          value={username}
+          onChange={(e) => setUsername(e.target.value)}
+          margin="normal"
+        />
+        <TextField
+          label="Password"
+          type="password"
+          variant="outlined"
+          fullWidth
+          value={password}
+          onChange={(e) => setPassword(e.target.value)}
+          margin="normal"
+        />
+        {error && (
+          <Typography color="error" sx={{ mt: 1 }}>
+            {error}
+          </Typography>
+        )}
+        <Button
+          type="submit"
+          variant="contained"
+          fullWidth
+          sx={{ mt: 2, bgcolor: "#58a6ff", "&:hover": { bgcolor: "#1d82d3" } }}
+        >
+          Login
+        </Button>
+      </Box>
+    </Box>
+  );
+}
+