feat(engines): frame uninstalled engines as headroom, not failures (#1531)

The catalogue's group captions read "Available" / "Not installed", which
renders a fresh install (3 of 16 engines ready) as a mostly-broken app.
The sections now say "Ready to use" / "Add more engines", and the
unavailable-row details toggle asks "What it needs" instead of "Why
unavailable?" — same information, framed as headroom to unlock.

Council outcome (first-run seat): unavailable engines must read as more
you could install, never as brokenness. Keys added to all 21 locales.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -11,6 +11,7 @@ the frozen-backend fallback mirror it for their toolchains.
 **Highlights**
 
 - Switch TTS, ASR and LLM engines from the status bar or workspace, with ready-only choices, memory status and environment-pin protection. (#1530)
+- The engine catalogue frames uninstalled engines as "Add more engines" with a "What it needs" explainer, instead of a wall of unavailable rows. (#1531)
 - Docker/server mode now requires an API key for remote changes and side-effectful admin checks across workers, engines, media tools, MCP, pronunciation, diagnostics, and LLM providers. (#1525)
 - The unified Support page no longer throws while opening a section in browsers or test environments without `scrollIntoView`. (#1525)
 - A faster, cleaner Dub workspace for multilingual production (#1489)

frontend/src/components/EngineCompatibilityMatrix.jsx

@@ -815,7 +815,11 @@ export default function EngineCompatibilityMatrix({
                       MUTED,
                     )}
                   >
-                    {b.available ? t('engines.available') : t('engines.notInstalled')}
+                    {/* Section framing, not status: "ready to use" vs "add
+                        more" frames the grey majority as headroom to unlock
+                        rather than a mostly-broken app (13 of 16 rows read as
+                        failures under a plain "Not installed" caption). */}
+                    {b.available ? t('engines.sectionReady') : t('engines.sectionMore')}
                   </div>
                 )}
                 <div

frontend/src/i18n/locales/ar.json

@@ -677,7 +677,9 @@
     "activeEngine": "نشط {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} توافق المحرك",
     "active": "نشط",
-    "whyUnavailable": "لماذا غير متوفر؟",
+    "whyUnavailable": "ما الذي يحتاجه",
+    "sectionReady": "جاهزة للاستخدام",
+    "sectionMore": "أضف المزيد من المحركات",
     "lastError": "الخطأ الأخير: {{error}}",
     "installedAndReady": "مثبتة وجاهزة",
     "notInstalled": "غير مثبت",

frontend/src/i18n/locales/de.json

@@ -677,7 +677,9 @@
     "activeEngine": "Aktiv {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} Motorkompatibilität",
     "active": "aktiv",
-    "whyUnavailable": "Warum nicht verfügbar?",
+    "whyUnavailable": "Was benötigt wird",
+    "sectionReady": "Einsatzbereit",
+    "sectionMore": "Weitere Motoren hinzufügen",
     "lastError": "Letzter Fehler: {{error}}",
     "installedAndReady": "Installiert und fertig",
     "notInstalled": "Nicht installiert",

frontend/src/i18n/locales/en.json

@@ -1971,7 +1971,9 @@
     "activeEngine": "Active {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} engine compatibility",
     "active": "active",
-    "whyUnavailable": "Why unavailable?",
+    "whyUnavailable": "What it needs",
+    "sectionReady": "Ready to use",
+    "sectionMore": "Add more engines",
     "lastError": "Last error: {{error}}",
     "installedAndReady": "Installed and ready",
     "notInstalled": "Not installed",

frontend/src/i18n/locales/es.json

@@ -677,7 +677,9 @@
     "activeEngine": "Activo {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} compatibilidad del motor",
     "active": "activo",
-    "whyUnavailable": "¿Por qué no está disponible?",
+    "whyUnavailable": "Qué necesita",
+    "sectionReady": "Listos para usar",
+    "sectionMore": "Añadir más motores",
     "lastError": "Último error: {{error}}",
     "installedAndReady": "Instalado y listo",
     "notInstalled": "No instalado",

frontend/src/i18n/locales/fr.json

@@ -677,7 +677,9 @@
     "activeEngine": "Actif {{family}} : {{engine}}",
     "engineCompatLabel": "Compatibilité moteur {{family}}",
     "active": "actif",
-    "whyUnavailable": "Pourquoi indisponible ?",
+    "whyUnavailable": "Ce qu'il lui faut",
+    "sectionReady": "Prêts à l'emploi",
+    "sectionMore": "Ajouter d'autres moteurs",
     "lastError": "Dernière erreur : {{error}}",
     "installedAndReady": "Installé et prêt",
     "notInstalled": "Non installé",

frontend/src/i18n/locales/hi.json

@@ -677,7 +677,9 @@
     "activeEngine": "सक्रिय {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} इंजन अनुकूलता",
     "active": "सक्रिय",
-    "whyUnavailable": "अनुपलब्ध क्यों?",
+    "whyUnavailable": "इसे क्या चाहिए",
+    "sectionReady": "उपयोग के लिए तैयार",
+    "sectionMore": "और इंजन जोड़ें",
     "lastError": "अंतिम त्रुटि: {{error}}",
     "installedAndReady": "स्थापित और तैयार",
     "notInstalled": "स्थापित नहीं",

frontend/src/i18n/locales/id.json

@@ -677,7 +677,9 @@
     "activeEngine": "Aktif {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} kompatibilitas mesin",
     "active": "aktif",
-    "whyUnavailable": "Mengapa tidak tersedia?",
+    "whyUnavailable": "Apa yang dibutuhkan",
+    "sectionReady": "Siap digunakan",
+    "sectionMore": "Tambahkan mesin lainnya",
     "lastError": "Kesalahan terakhir: {{error}}",
     "installedAndReady": "Terpasang dan siap",
     "notInstalled": "Tidak dipasang",

frontend/src/i18n/locales/it.json

@@ -677,7 +677,9 @@
     "activeEngine": "Attivo {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} compatibilità motore",
     "active": "attivo",
-    "whyUnavailable": "Perché non disponibile?",
+    "whyUnavailable": "Cosa serve",
+    "sectionReady": "Pronti all'uso",
+    "sectionMore": "Aggiungi altri motori",
     "lastError": "Ultimo errore: {{error}}",
     "installedAndReady": "Installato e pronto",
     "notInstalled": "Non installato",

frontend/src/i18n/locales/ja.json

@@ -677,7 +677,9 @@
     "activeEngine": "アクティブ {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} エンジンの互換性",
     "active": "アクティブな",
-    "whyUnavailable": "なぜ利用できないのでしょうか?",
+    "whyUnavailable": "必要なもの",
+    "sectionReady": "すぐに使える",
+    "sectionMore": "エンジンを追加",
     "lastError": "最後のエラー: {{error}}",
     "installedAndReady": "インストールされて準備完了",
     "notInstalled": "インストールされていません",

frontend/src/i18n/locales/ko.json

@@ -677,7 +677,9 @@
     "activeEngine": "활성 {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} 엔진 호환성",
     "active": "활성",
-    "whyUnavailable": "왜 사용할 수 없나요?",
+    "whyUnavailable": "필요한 것",
+    "sectionReady": "바로 사용 가능",
+    "sectionMore": "엔진 추가",
     "lastError": "마지막 오류: {{error}}",
     "installedAndReady": "설치 및 준비 완료",
     "notInstalled": "설치되지 않음",

frontend/src/i18n/locales/nl.json

@@ -677,7 +677,9 @@
     "activeEngine": "Actief {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} motorcompatibiliteit",
     "active": "actief",
-    "whyUnavailable": "Waarom niet beschikbaar?",
+    "whyUnavailable": "Wat het nodig heeft",
+    "sectionReady": "Klaar voor gebruik",
+    "sectionMore": "Meer motoren toevoegen",
     "lastError": "Laatste fout: {{error}}",
     "installedAndReady": "Geïnstalleerd en klaar",
     "notInstalled": "Niet geïnstalleerd",

frontend/src/i18n/locales/pl.json

@@ -677,7 +677,9 @@
     "activeEngine": "Aktywny {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} kompatybilność silnika",
     "active": "aktywny",
-    "whyUnavailable": "Dlaczego niedostępne?",
+    "whyUnavailable": "Czego potrzebuje",
+    "sectionReady": "Gotowe do użycia",
+    "sectionMore": "Dodaj więcej silników",
     "lastError": "Ostatni błąd: {{error}}",
     "installedAndReady": "Zainstalowany i gotowy",
     "notInstalled": "Nie zainstalowano",

frontend/src/i18n/locales/pt.json

@@ -677,7 +677,9 @@
     "activeEngine": "Ativo {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} compatibilidade do motor",
     "active": "ativo",
-    "whyUnavailable": "Por que indisponível?",
+    "whyUnavailable": "O que falta",
+    "sectionReady": "Prontos para usar",
+    "sectionMore": "Adicionar mais motores",
     "lastError": "Último erro: {{error}}",
     "installedAndReady": "Instalado e pronto",
     "notInstalled": "Não instalado",

frontend/src/i18n/locales/ru.json

@@ -677,7 +677,9 @@
     "activeEngine": "Активен {{family}}: {{engine}}",
     "engineCompatLabel": "Совместимость с двигателем {{family}}",
     "active": "активный",
-    "whyUnavailable": "Почему недоступен?",
+    "whyUnavailable": "Что нужно",
+    "sectionReady": "Готовы к использованию",
+    "sectionMore": "Добавить больше двигателей",
     "lastError": "Последняя ошибка: {{error}}",
     "installedAndReady": "Установлен и готов",
     "notInstalled": "Не установлено",

frontend/src/i18n/locales/sv.json

@@ -677,7 +677,9 @@
     "activeEngine": "Aktiv {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} motorkompatibilitet",
     "active": "aktiv",
-    "whyUnavailable": "Varför inte tillgänglig?",
+    "whyUnavailable": "Vad som krävs",
+    "sectionReady": "Redo att använda",
+    "sectionMore": "Lägg till fler motorer",
     "lastError": "Senaste fel: {{error}}",
     "installedAndReady": "Installerad och klar",
     "notInstalled": "Ej installerad",

frontend/src/i18n/locales/th.json

@@ -677,7 +677,9 @@
     "activeEngine": "ใช้งาน {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} ความเข้ากันได้ของเครื่องยนต์",
     "active": "ใช้งานอยู่",
-    "whyUnavailable": "ทำไมไม่พร้อมใช้งาน?",
+    "whyUnavailable": "สิ่งที่ต้องมี",
+    "sectionReady": "พร้อมใช้งาน",
+    "sectionMore": "เพิ่มเครื่องยนต์อื่น ๆ",
     "lastError": "ข้อผิดพลาดครั้งล่าสุด: {{error}}",
     "installedAndReady": "ติดตั้งแล้วพร้อม",
     "notInstalled": "ไม่ได้ติดตั้ง",

frontend/src/i18n/locales/tr.json

@@ -677,7 +677,9 @@
     "activeEngine": "Etkin {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} motor uyumluluğu",
     "active": "aktif",
-    "whyUnavailable": "Neden kullanılamıyor?",
+    "whyUnavailable": "Neye ihtiyacı var",
+    "sectionReady": "Kullanıma hazır",
+    "sectionMore": "Daha fazla motor ekle",
     "lastError": "Son hata: {{error}}",
     "installedAndReady": "Kurulu ve hazır",
     "notInstalled": "Kurulu değil",

frontend/src/i18n/locales/uk.json

@@ -677,7 +677,9 @@
     "activeEngine": "Активний {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} сумісність з двигуном",
     "active": "активний",
-    "whyUnavailable": "Чому недоступний?",
+    "whyUnavailable": "Що потрібно",
+    "sectionReady": "Готові до використання",
+    "sectionMore": "Додати більше двигунів",
     "lastError": "Остання помилка: {{error}}",
     "installedAndReady": "Встановлено і готово",
     "notInstalled": "Не встановлено",

frontend/src/i18n/locales/vi.json

@@ -677,7 +677,9 @@
     "activeEngine": "Đang hoạt động {{family}}: {{engine}}",
     "engineCompatLabel": "{{family}} khả năng tương thích động cơ",
     "active": "hoạt động",
-    "whyUnavailable": "Tại sao không có sẵn?",
+    "whyUnavailable": "Cần những gì",
+    "sectionReady": "Sẵn sàng sử dụng",
+    "sectionMore": "Thêm động cơ khác",
     "lastError": "Lỗi cuối cùng: {{error}}",
     "installedAndReady": "Đã cài đặt và sẵn sàng",
     "notInstalled": "Chưa được cài đặt",

frontend/src/i18n/locales/zh-CN.json

@@ -634,7 +634,9 @@
     "activeEngine": "当前 {{family}}：{{engine}}",
     "engineCompatLabel": "{{family}} 引擎兼容性",
     "active": "当前",
-    "whyUnavailable": "为什么不可用？",
+    "whyUnavailable": "所需条件",
+    "sectionReady": "即可使用",
+    "sectionMore": "添加更多引擎",
     "lastError": "最后一个错误：{{error}}",
     "installedAndReady": "安装并准备就绪",
     "notInstalled": "未安装",

frontend/src/i18n/locales/zh-TW.json

@@ -677,7 +677,9 @@
     "activeEngine": "活動 {{family}}：{{engine}}",
     "engineCompatLabel": "{{family}} 引擎相容性",
     "active": "活躍的",
-    "whyUnavailable": "為什麼不可用？",
+    "whyUnavailable": "所需條件",
+    "sectionReady": "隨時可用",
+    "sectionMore": "新增更多引擎",
     "lastError": "最後一個錯誤：{{error}}",
     "installedAndReady": "安裝並準備就緒",
     "notInstalled": "未安裝",