Add ESLint/Prettier config, TTS env test coverage, and missing a11y:manual script (#1305, #1306, #1307, #1308)

frontend/.prettierignore

@@ -0,0 +1,8 @@
+.next/
+coverage/
+playwright-report/
+test-results/
+node_modules/
+public/
+src/lib/api/schema.d.ts
+next-env.d.ts

frontend/.prettierrc

@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "printWidth": 100,
+  "tabWidth": 2
+}

frontend/eslint.config.mjs

@@ -0,0 +1,19 @@
+import { FlatCompat } from '@eslint/eslintrc';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+});
+
+const eslintConfig = [
+  ...compat.extends('next/core-web-vitals', 'next/typescript', 'prettier'),
+  {
+    ignores: ['.next/**', 'coverage/**', 'playwright-report/**', 'test-results/**'],
+  },
+];
+
+export default eslintConfig;

frontend/package.json

@@ -9,6 +9,8 @@
     "build": "npm run generate-client && next build",
     "start": "next start",
     "lint": "next lint",
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
     "test": "jest",
     "test:watch": "jest --watch",
     "test:coverage": "jest --coverage",
@@ -41,6 +43,7 @@
   },
   "devDependencies": {
     "@axe-core/react": "^4.12.1",
+    "@eslint/eslintrc": "^3.2.0",
     "@next/bundle-analyzer": "16.2.11",
     "@playwright/test": "^1.61.1",
     "@testing-library/dom": "^10.4.1",
@@ -53,12 +56,16 @@
     "@types/react-dom": "^19.2.3",
     "axe-core": "^4.12.1",
     "bundlewatch": "^0.4.2",
+    "eslint": "^9.20.0",
+    "eslint-config-next": "16.2.11",
+    "eslint-config-prettier": "^9.1.0",
     "jest": "^30.4.2",
     "jest-axe": "^10.0.0",
     "jest-environment-jsdom": "^30.4.1",
     "lighthouse": "^13.4.1",
     "openapi-typescript": "^7.0.0",
     "pa11y": "^9.1.1",
+    "prettier": "^3.4.2",
     "typescript": "^7.0.2"
   },
   "engines": {

frontend/scripts/manual-testing-checklist.js

@@ -0,0 +1,67 @@
+/**
+ * Manual Accessibility Testing Checklist
+ *
+ * Automated tools (axe-core, Lighthouse, jest-axe) catch most WCAG 2.1 AA
+ * violations, but several categories require a human to actually try the
+ * page. This prints that checklist so `npm run a11y:manual` has something
+ * to run — it previously pointed at a script that didn't exist in this repo.
+ */
+
+const CHECKLIST = [
+  {
+    category: 'Keyboard navigation',
+    items: [
+      'Tab through the entire page — every interactive element is reachable and in a logical order',
+      'Focus is always visible (no invisible focus outlines)',
+      'No keyboard trap: focus can always move forward and backward out of any widget',
+      'Modals/dialogs trap focus while open and return it to the trigger on close',
+      'Skip-to-content link is the first focusable element and actually works',
+    ],
+  },
+  {
+    category: 'Screen reader (VoiceOver / NVDA / JAWS)',
+    items: [
+      'Page landmarks (banner, main, navigation, contentinfo) are announced correctly',
+      'Headings form a logical, non-skipping hierarchy',
+      'Form fields announce their label, required state, and any validation error',
+      'Live regions (toasts, status updates) are announced without moving focus',
+      'Images convey their alt text (or are correctly marked decorative)',
+    ],
+  },
+  {
+    category: 'Color & contrast',
+    items: [
+      'Text meets 4.5:1 contrast (3:1 for large text) in both light and dark mode',
+      'Information is never conveyed by color alone (e.g. status badges also use text/icons)',
+      'Focus indicators meet 3:1 contrast against their background',
+    ],
+  },
+  {
+    category: 'Zoom & reflow',
+    items: [
+      'Page is usable at 200% browser zoom with no horizontal scroll or clipped content',
+      'Page is usable at 400% zoom in a 1280px viewport (WCAG 1.4.10 reflow)',
+    ],
+  },
+  {
+    category: 'Motion & animation',
+    items: [
+      'prefers-reduced-motion is respected for any animated transitions',
+      'No content flashes more than 3 times per second',
+    ],
+  },
+];
+
+function printChecklist() {
+  console.log('Manual Accessibility Testing Checklist (WCAG 2.1 AA)\n');
+  for (const { category, items } of CHECKLIST) {
+    console.log(category);
+    for (const item of items) {
+      console.log(`  [ ] ${item}`);
+    }
+    console.log('');
+  }
+  console.log('Run alongside `npm run test:a11y`, `npm run lighthouse`, and `npm run axe`.');
+}
+
+printChecklist();

frontend/src/lib/__tests__/env.test.ts

@@ -1,8 +1,10 @@
 describe('env validation', () => {
   const original = process.env.NEXT_PUBLIC_API_URL;
+  const originalTts = process.env.NEXT_PUBLIC_TTS_API_URL;
 
   afterEach(() => {
     process.env.NEXT_PUBLIC_API_URL = original;
+    process.env.NEXT_PUBLIC_TTS_API_URL = originalTts;
     jest.resetModules();
   });
 
@@ -33,4 +35,48 @@ describe('env validation', () => {
       });
     }).toThrow(/must be a valid URL/);
   });
+
+  // Issue #1307: TTS integration (#116) is now in scope, but no test
+  // exercised NEXT_PUBLIC_TTS_API_URL's validation branch at all.
+  it('parses a valid NEXT_PUBLIC_TTS_API_URL', () => {
+    process.env.NEXT_PUBLIC_API_URL = 'http://localhost:3001';
+    process.env.NEXT_PUBLIC_TTS_API_URL = 'http://localhost:3002';
+    let mod: typeof import('../env');
+    jest.isolateModules(() => {
+      mod = require('../env');
+    });
+    expect(mod!.getEnvConfig().NEXT_PUBLIC_TTS_API_URL).toBe('http://localhost:3002');
+  });
+
+  it('allows NEXT_PUBLIC_TTS_API_URL to be unset — TTS features are optional', () => {
+    process.env.NEXT_PUBLIC_API_URL = 'http://localhost:3001';
+    delete process.env.NEXT_PUBLIC_TTS_API_URL;
+    let mod: typeof import('../env');
+    expect(() => {
+      jest.isolateModules(() => {
+        mod = require('../env');
+      });
+    }).not.toThrow();
+    expect(mod!.getEnvConfig().NEXT_PUBLIC_TTS_API_URL).toBeUndefined();
+  });
+
+  it('allows NEXT_PUBLIC_TTS_API_URL to be an empty string', () => {
+    process.env.NEXT_PUBLIC_API_URL = 'http://localhost:3001';
+    process.env.NEXT_PUBLIC_TTS_API_URL = '';
+    expect(() => {
+      jest.isolateModules(() => {
+        require('../env');
+      });
+    }).not.toThrow();
+  });
+
+  it('throws when NEXT_PUBLIC_TTS_API_URL is set but not a valid URL', () => {
+    process.env.NEXT_PUBLIC_API_URL = 'http://localhost:3001';
+    process.env.NEXT_PUBLIC_TTS_API_URL = 'not-a-url';
+    expect(() => {
+      jest.isolateModules(() => {
+        require('../env');
+      });
+    }).toThrow(/NEXT_PUBLIC_TTS_API_URL.*must be a valid URL/s);
+  });
 });