chore: germantax customer project

apps/app/eslint.config.js

@@ -0,0 +1,49 @@
+import i18next from 'eslint-plugin-i18next'
+import react from 'eslint-plugin-react'
+import jsxA11y from 'eslint-plugin-jsx-a11y'
+
+/**
+ * Enforces the CONVENTIONS.md rules:
+ *  - i18n keying (no-literal-string)
+ *  - strict jsx-a11y
+ *  - react hooks / components
+ *
+ * Custom rules that ship in Stage 3 (noted in CONVENTIONS.md):
+ *  - no-array-methods-in-widgets
+ *  - no-date-libraries-in-widgets
+ */
+export default [
+  {
+    files: ['src/**/*.{ts,tsx}'],
+    ignores: [
+      'src/routeTree.gen.ts',
+      '**/*.gen.ts',
+      '**/*.gen.d.ts',
+      'dist/**',
+      'node_modules/**',
+    ],
+    plugins: { i18next, react, 'jsx-a11y': jsxA11y },
+    languageOptions: {
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+      parserOptions: {
+        ecmaFeatures: { jsx: true },
+      },
+    },
+    rules: {
+      // i18n keying — every visible string must go through t()
+      'i18next/no-literal-string': [
+        'error',
+        {
+          markupOnly: true,
+          onlyAttribute: ['label', 'placeholder', 'title', 'aria-label'],
+          ignoreCallee: ['t', 'i18n.t', 'useTranslation'],
+          ignoreComponent: ['Code', 'Kbd'],
+        },
+      ],
+
+      // A11y — Radix defaults stay; no escape hatch to <div onClick>
+      ...jsxA11y.configs.strict.rules,
+    },
+  },
+]