feat: add root language redirect for o2switch hosting

tests/htaccess.test.ts

@@ -0,0 +1,17 @@
+import { describe, it, expect, beforeAll } from 'vitest';
+import { execSync } from 'node:child_process';
+import { readFileSync } from 'node:fs';
+
+describe('root language redirect', () => {
+  beforeAll(() => {
+    execSync('npm run build', { stdio: 'inherit' });
+  });
+
+  it('copies .htaccess to dist with the french/english redirect rules', () => {
+    const htaccess = readFileSync('dist/.htaccess', 'utf-8');
+    expect(htaccess).toContain('RewriteEngine On');
+    expect(htaccess).toContain('HTTP:Accept-Language} fr');
+    expect(htaccess).toContain('RewriteRule ^$ /fr/ [R=302,L]');
+    expect(htaccess).toContain('RewriteRule ^$ /en/ [R=302,L]');
+  });
+});