implement admin panel with login functionality and dashboard layout

admin/src/Layout/Sidebar.tsx

@@ -0,0 +1,81 @@
+import React from "react";
+import { Box, Flex, VStack, Heading, Text, Link } from "@chakra-ui/react";
+
+type SidebarProps = {
+  viewAusleihen: () => void;
+  viewGegenstaende: () => void;
+  viewSchliessfaecher: () => void;
+  viewUser: () => void;
+};
+
+const Sidebar: React.FC<SidebarProps> = ({
+  viewAusleihen,
+  viewGegenstaende,
+  viewSchliessfaecher,
+  viewUser,
+}) => {
+  return (
+    <Box
+      as="aside"
+      w="260px"
+      minH="100vh"
+      bg="gray.800"
+      color="gray.100"
+      px={6}
+      py={8}
+      borderRight="1px solid"
+      borderColor="gray.700"
+    >
+      <Flex direction="column" h="full">
+        <Heading size="md" mb={8} letterSpacing="wide">
+          Borrow System
+        </Heading>
+
+        <VStack align="stretch" gap={4} fontSize="sm">
+          <Link
+            px={3}
+            py={2}
+            rounded="md"
+            _hover={{ bg: "gray.700", textDecoration: "none" }}
+            onClick={viewUser}
+          >
+            User
+          </Link>
+          <Link
+            px={3}
+            py={2}
+            rounded="md"
+            _hover={{ bg: "gray.700", textDecoration: "none" }}
+            onClick={viewAusleihen}
+          >
+            Ausleihen
+          </Link>
+          <Link
+            px={3}
+            py={2}
+            rounded="md"
+            _hover={{ bg: "gray.700", textDecoration: "none" }}
+            onClick={viewGegenstaende}
+          >
+            Gegenstände
+          </Link>
+          <Link
+            px={3}
+            py={2}
+            rounded="md"
+            _hover={{ bg: "gray.700", textDecoration: "none" }}
+            onClick={viewSchliessfaecher}
+          >
+            Schließfächer
+          </Link>
+        </VStack>
+
+        <Box mt="auto" pt={8} fontSize="xs" color="gray.500">
+          <Text>&copy; Made with ❤️ by Theis Gaedigk</Text>
+        </Box>
+      </Flex>
+    </Box>
+  );
+};
+
+export default Sidebar;