fix(lint): enable ESLint v9 rules and fix existing lint issues

eslint.config.mjs

@@ -3,23 +3,10 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-import js from '@eslint/js'
-import { FlatCompat } from '@eslint/eslintrc'
-import nextcloudConfig from '@nextcloud/eslint-config'
-import { dirname } from 'node:path'
-import { fileURLToPath } from 'node:url'
-
-const compat = new FlatCompat({
-	baseDirectory: dirname(fileURLToPath(import.meta.url)),
-	recommendedConfig: js.configs.recommended,
-	allConfig: js.configs.all,
-})
-
-const compatConfigs = (Array.isArray(nextcloudConfig) ? nextcloudConfig : [nextcloudConfig])
-	.flatMap((config) => compat.config(config))
+import { recommended } from '@nextcloud/eslint-config'
 
 export default [
-	...compatConfigs,
+	...recommended,
 
 	{
 		name: 'libresign/ignores',
@@ -39,61 +26,17 @@ export default [
 	{
 		name: 'libresign/config',
 		rules: {
-			// production only
-			'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
+			// @nextcloud/eslint-config v9 replaced eslint-plugin-import with
+			// perfectionist/sort-imports and import-extensions; keep only app overrides here.
+		},
+	},
+
+	{
+		// Vue plugin is only registered for *.vue files; keep this override scoped.
+		name: 'libresign/vue-overrides',
+		files: ['**/*.vue'],
+		rules: {
 			'vue/no-unused-components': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
-			'import/order': [
-				'error',
-				{
-					groups: ['builtin', 'external', 'internal', ['parent', 'sibling', 'index'], 'unknown'],
-					pathGroups: [
-						{
-							// group all style imports at the end
-							pattern: '{*.css,*.scss}',
-							patternOptions: { matchBase: true },
-							group: 'unknown',
-							position: 'after',
-						},
-						{
-							// group material design icons
-							pattern: 'vue-material-design-icons/**',
-							group: 'external',
-							position: 'after',
-						},
-						{
-							// group @nextcloud imports
-							pattern: '@nextcloud/{!(vue),!(vue)/**}',
-							group: 'external',
-							position: 'after',
-						},
-						{
-							// group @nextcloud/vue imports
-							pattern: '{@nextcloud/vue,@nextcloud/vue/**}',
-							group: 'external',
-							position: 'after',
-						},
-						{
-							// group project components
-							pattern: '*.vue',
-							patternOptions: { matchBase: true },
-							group: 'parent',
-							position: 'before',
-						},
-					],
-					pathGroupsExcludedImportTypes: ['@nextcloud', 'vue-material-design-icons'],
-					'newlines-between': 'always',
-					alphabetize: {
-						order: 'asc',
-						caseInsensitive: true,
-					},
-					warnOnUnassignedImports: true,
-				},
-			],
-			'import/no-unresolved': ['error', {
-				// Ignore Webpack query parameters, not supported by eslint-plugin-import
-				// https://github.com/import-js/eslint-plugin-import/issues/2562
-				ignore: ['\\?raw$'],
-			}],
 		},
 	},
 
@@ -107,4 +50,89 @@ export default [
 			'no-use-before-define': 'off',
 		},
 	},
+
+	{
+		name: 'libresign/playwright-overrides',
+		files: ['playwright/**/*.ts'],
+		rules: {
+			// Playwright fixture callbacks require object destructuring even when unused.
+			'no-empty-pattern': 'off',
+		},
+	},
+
+	/**
+	 * Remaining rules intentionally deferred with per-rule reasons (issue #8051 follow-ups).
+	 * Enable one rule at a time: remove it here, fix violations, commit separately.
+	 * Source of truth: https://github.com/LibreSign/libresign/issues/8051
+	 */
+	{
+		name: 'libresign/disabled-during-migration',
+		rules: {
+			// Translations — changes user-visible strings
+			'@nextcloud/l10n-enforce-ellipsis': 'off', // ~6 hits; changes translation strings
+			'@nextcloud/l10n-non-breaking-space': 'off', // ~6 hits; changes translation strings
+
+			// Behavior/API risk — may rename Vue events, slots, attrs, or break DOM contracts
+			'@nextcloud/no-deprecated-library-props': 'off', // ~10 hits; needs careful Nc* prop migration
+			'vue/attribute-hyphenation': 'off', // ~404 hits; large + DOM attr naming
+			'vue/custom-event-name-casing': 'off', // ~65 hits; may rename Vue events
+			'vue/slot-name-casing': 'off', // ~3 hits; may rename slots
+			'vue/v-on-event-hyphenation': 'off', // ~74 hits; may rename listeners
+			'vue/no-v-html': 'off', // ~8 hits; intentional trusted HTML in places
+			'vue/multi-word-component-names': 'off', // ~18 hits; rename churn for short view names
+			'camelcase': 'off', // ~9 hits; store fields mirror backend/API keys
+
+			// Formatting — large autofix churn; follow-up PR
+			'@stylistic/arrow-parens': 'off', // ~168 hits
+			'@stylistic/comma-dangle': 'off', // ~46 hits
+			'@stylistic/eol-last': 'off', // ~10 hits
+			'@stylistic/exp-list-style': 'off', // ~34 hits
+			'@stylistic/function-call-argument-newline': 'off', // ~4 hits
+			'@stylistic/function-call-spacing': 'off', // ~1 hit
+			'@stylistic/function-paren-newline': 'off', // ~177 hits
+			'@stylistic/implicit-arrow-linebreak': 'off', // ~39 hits
+			'@stylistic/indent': 'off', // ~778 hits; tabs vs spaces migration
+			'@stylistic/indent-binary-ops': 'off', // ~4 hits
+			'@stylistic/lines-between-class-members': 'off', // ~1 hit
+			'@stylistic/max-statements-per-line': 'off', // ~100 hits
+			'@stylistic/member-delimiter-style': 'off', // ~180 hits
+			'@stylistic/no-extra-semi': 'off', // ~23 hits
+			'@stylistic/no-multi-spaces': 'off', // ~1 hit
+			'@stylistic/no-multiple-empty-lines': 'off', // ~42 hits
+			'@stylistic/no-tabs': 'off', // ~190 hits; tabs vs spaces migration
+			'@stylistic/no-trailing-spaces': 'off', // ~1 hit
+			'@stylistic/operator-linebreak': 'off', // ~6 hits
+			'@stylistic/padded-blocks': 'off', // ~4 hits
+			'@stylistic/quote-props': 'off', // ~26 hits
+			'@stylistic/semi': 'off', // ~16 hits
+			'@stylistic/space-before-function-paren': 'off', // ~2 hits
+			'@stylistic/space-in-parens': 'off', // ~2 hits
+			'vue/first-attribute-linebreak': 'off', // ~435 hits; formatting churn
+			'vue/html-indent': 'off', // ~164 hits; formatting churn
+			'vue/max-attributes-per-line': 'off', // ~68 hits; formatting churn
+			'vue/multiline-html-element-content-newline': 'off', // ~2 hits
+			'vue/singleline-html-element-content-newline': 'off', // ~74 hits; formatting churn
+
+			// Import sorting / extensions — large churn; needs dedicated PR
+			'perfectionist/sort-imports': 'off', // ~1216 hits
+			'perfectionist/sort-named-imports': 'off', // ~198 hits
+			'import-extensions/extensions': 'off', // ~558 hits
+			'import-extensions/ban-inline-type-imports': 'off', // ~68 hits; unsafe autofix vs type-only imports
+
+			// Documentation debt
+			'jsdoc/require-jsdoc': 'off', // ~1144 hits; needs real docs not stubs
+			'jsdoc/require-param': 'off', // ~99 hits; follow require-jsdoc work
+			'jsdoc/require-param-description': 'off', // ~18 hits; follow require-jsdoc work
+
+			// Semantic cleanup needing focused PRs
+			'@typescript-eslint/consistent-type-imports': 'off', // ~66 hits; mostly typeof import() in Vitest mocks
+			'@typescript-eslint/no-explicit-any': 'off', // ~17 hits; needs typed replacements
+			'@typescript-eslint/no-unused-vars': 'off', // ~78 hits; non-fixable cleanup
+			'@typescript-eslint/no-use-before-define': 'off', // ~38 hits; non-fixable
+			'no-unused-vars': 'off', // ~3 hits; non-fixable (JS twin)
+			'no-use-before-define': 'off', // ~8 hits; non-fixable (JS twin)
+			'antfu/top-level-function': 'off', // ~114 hits; style preference, large churn
+			'vue/no-unused-properties': 'off', // ~11 hits; public API / shared editor props
+		},
+	},
 ]