Fix SSL SAN cert + React hydration #423

- SAN cert covers all 5 PWA domains (tasks,cal,plans,goals,chat)
- i18n hydration: SSR uses cs default, localStorage after mount
- Matches ThemeProvider pattern

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/tasks/app/register/page.tsx

@@ -113,7 +113,7 @@ export default function RegisterPage() {
                 value={phone}
                 onChange={(e) => setPhone(e.target.value)}
                 className="w-full px-3 py-2.5 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-800 focus:ring-2 focus:ring-blue-500 focus:border-transparent outline-none"
-                placeholder="+420 123 456 789"
+                placeholder={t("auth.phonePlaceholder")}
               />
             </div>