style(guide): 🎨 Add ESLint rules for unused variables and type safety enforcement

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

games/age-of-dwarves/guide/eslint.config.js

@@ -0,0 +1,46 @@
+import tseslint from 'typescript-eslint'
+import reactHooks from 'eslint-plugin-react-hooks'
+import unusedImports from 'eslint-plugin-unused-imports'
+import fileLength from '@lilith/eslint-plugin-file-length'
+import importAlias from '@lilith/eslint-plugin-import-alias'
+
+export default tseslint.config(
+  { ignores: ['dist/', '.vite/'] },
+  tseslint.configs.recommended,
+  {
+    plugins: {
+      'react-hooks': reactHooks,
+      'unused-imports': unusedImports,
+      '@lilith/file-length': fileLength,
+      'import-alias': importAlias,
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+
+      // Unused imports — autofix on lint:fix
+      '@typescript-eslint/no-unused-vars': 'off',
+      'unused-imports/no-unused-imports': 'error',
+      'unused-imports/no-unused-vars': ['error', {
+        vars: 'all', varsIgnorePattern: '^_',
+        args: 'after-used', argsIgnorePattern: '^_',
+      }],
+
+      // Type discipline (align with typescript-code-standards.md)
+      '@typescript-eslint/no-explicit-any': 'error',
+      '@typescript-eslint/consistent-type-imports': ['error', {
+        prefer: 'type-imports', fixStyle: 'separate-type-imports',
+      }],
+
+      // File length — project max 500 lines (CLAUDE.md)
+      '@lilith/file-length/file-length': ['error', { warnThreshold: 400, errorThreshold: 500 }],
+
+      // Import alias enforcement — prefer @/ over relative src/ paths
+      'import-alias/prefer-alias': 'error',
+
+      // Guide pages are lazy-loaded default exports (vite code-splitting)
+      'no-console': 'error',
+      'prefer-const': 'error',
+      'no-var': 'error',
+    },
+  },
+)