Implement navigation and view management in DataViewer, adding Dashboard and TableManagement components. Update export data handling based on current view. Create new components for managing Kreditor, Konto, and BU tables with CRUD functionality. Refactor admin routes to remove admin access checks and streamline data handling for various entities.

.eslintrc.js

@@ -0,0 +1,31 @@
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+    node: true,
+  },
+  extends: [
+    'eslint:recommended',
+  ],
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+  rules: {
+    // Prevent browser alert dialogs
+    'no-alert': 'error',
+    'no-confirm': 'error',
+    'no-prompt': 'error',
+    
+    // Additional helpful rules
+    'no-console': 'warn',
+    'no-debugger': 'error',
+  },
+  globals: {
+    // Allow React globals
+    React: 'readonly',
+  },
+};