feat(settings): hide API key from frontend, use status+edit instead of password field

Backend changes:
- Add civitai_api_key to _NO_SYNC_KEYS, return only boolean civitai_api_key_set
- Clean up known template placeholder on load to prevent false positive

Frontend changes:
- Replace type=password with type=text + CSS masking (-webkit-text-security)
- Replace pre-filled input with status display (Configured/Not configured)
- Add inline edit view with Save/Cancel buttons
- Re-add eye toggle via CSS class toggle (not type switching)
- Use CSS transitions for smooth status/edit view switching

This prevents Chromium/Vivaldi password manager from triggering
'save password' prompts when opening the settings modal.

locales/de.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai API Key",
         "civitaiApiKeyPlaceholder": "Geben Sie Ihren Civitai API Key ein",
         "civitaiApiKeyHelp": "Wird für die Authentifizierung beim Herunterladen von Modellen von Civitai verwendet",
+        "civitaiApiKeyConfigured": "Konfiguriert",
+        "civitaiApiKeyNotConfigured": "Nicht konfiguriert",
+        "civitaiApiKeySet": "Einrichten",
         "civitaiHost": {
             "label": "Civitai-Host",
             "help": "Wählen Sie aus, welche Civitai-Seite geöffnet wird, wenn Sie „View on Civitai“-Links verwenden.",

locales/en.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai API Key",
         "civitaiApiKeyPlaceholder": "Enter your Civitai API key",
         "civitaiApiKeyHelp": "Used for authentication when downloading models from Civitai",
+        "civitaiApiKeyConfigured": "Configured",
+        "civitaiApiKeyNotConfigured": "Not configured",
+        "civitaiApiKeySet": "Set up",
         "civitaiHost": {
             "label": "Civitai host",
             "help": "Choose which Civitai site opens when using View on Civitai links.",

locales/es.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Clave API de Civitai",
         "civitaiApiKeyPlaceholder": "Introduce tu clave API de Civitai",
         "civitaiApiKeyHelp": "Utilizada para autenticación al descargar modelos de Civitai",
+        "civitaiApiKeyConfigured": "Configurado",
+        "civitaiApiKeyNotConfigured": "No configurado",
+        "civitaiApiKeySet": "Configurar",
         "civitaiHost": {
             "label": "Host de Civitai",
             "help": "Elige qué sitio de Civitai se abre al usar los enlaces de \"View on Civitai\".",

locales/fr.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Clé API Civitai",
         "civitaiApiKeyPlaceholder": "Entrez votre clé API Civitai",
         "civitaiApiKeyHelp": "Utilisée pour l'authentification lors du téléchargement de modèles depuis Civitai",
+        "civitaiApiKeyConfigured": "Configuré",
+        "civitaiApiKeyNotConfigured": "Non configuré",
+        "civitaiApiKeySet": "Configurer",
         "civitaiHost": {
             "label": "Hôte Civitai",
             "help": "Choisissez quel site Civitai s'ouvre lorsque vous utilisez les liens « View on Civitai ».",

locales/he.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "מפתח API של Civitai",
         "civitaiApiKeyPlaceholder": "הזן את מפתח ה-API שלך מ-Civitai",
         "civitaiApiKeyHelp": "משמש לאימות בעת הורדת מודלים מ-Civitai",
+        "civitaiApiKeyConfigured": "מוגדר",
+        "civitaiApiKeyNotConfigured": "לא מוגדר",
+        "civitaiApiKeySet": "הגדר",
         "civitaiHost": {
             "label": "מארח Civitai",
             "help": "בחר איזה אתר של Civitai ייפתח בעת שימוש בקישורי \"View on Civitai\".",

locales/ja.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai APIキー",
         "civitaiApiKeyPlaceholder": "Civitai APIキーを入力してください",
         "civitaiApiKeyHelp": "Civitaiからモデルをダウンロードするときの認証に使用されます",
+        "civitaiApiKeyConfigured": "設定済み",
+        "civitaiApiKeyNotConfigured": "未設定",
+        "civitaiApiKeySet": "設定",
         "civitaiHost": {
             "label": "Civitai ホスト",
             "help": "「View on Civitai」リンクを使うときに開く Civitai サイトを選択します。",

locales/ko.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai API 키",
         "civitaiApiKeyPlaceholder": "Civitai API 키를 입력하세요",
         "civitaiApiKeyHelp": "Civitai에서 모델을 다운로드할 때 인증에 사용됩니다",
+        "civitaiApiKeyConfigured": "설정됨",
+        "civitaiApiKeyNotConfigured": "설정되지 않음",
+        "civitaiApiKeySet": "설정",
         "civitaiHost": {
             "label": "Civitai 호스트",
             "help": "\"View on Civitai\" 링크를 사용할 때 어떤 Civitai 사이트를 열지 선택합니다.",

locales/ru.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Ключ API Civitai",
         "civitaiApiKeyPlaceholder": "Введите ваш ключ API Civitai",
         "civitaiApiKeyHelp": "Используется для аутентификации при загрузке моделей с Civitai",
+        "civitaiApiKeyConfigured": "Настроен",
+        "civitaiApiKeyNotConfigured": "Не настроен",
+        "civitaiApiKeySet": "Настроить",
         "civitaiHost": {
             "label": "Хост Civitai",
             "help": "Выберите, какой сайт Civitai будет открываться при использовании ссылок «View on Civitai».",

locales/zh-CN.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai API 密钥",
         "civitaiApiKeyPlaceholder": "请输入你的 Civitai API 密钥",
         "civitaiApiKeyHelp": "用于从 Civitai 下载模型时的身份验证",
+        "civitaiApiKeyConfigured": "已配置",
+        "civitaiApiKeyNotConfigured": "未配置",
+        "civitaiApiKeySet": "设置",
         "civitaiHost": {
             "label": "Civitai 站点",
             "help": "选择使用“在 Civitai 中查看”时默认打开的 Civitai 站点。",

locales/zh-TW.json

@@ -274,6 +274,9 @@
         "civitaiApiKey": "Civitai API 金鑰",
         "civitaiApiKeyPlaceholder": "請輸入您的 Civitai API 金鑰",
         "civitaiApiKeyHelp": "用於從 Civitai 下載模型時的身份驗證",
+        "civitaiApiKeyConfigured": "已設定",
+        "civitaiApiKeyNotConfigured": "未設定",
+        "civitaiApiKeySet": "設定",
         "civitaiHost": {
             "label": "Civitai 站點",
             "help": "選擇使用「在 Civitai 中查看」時預設開啟的 Civitai 站點。",