feat(modal): open model metadata sidecar location from the model modal

Centralized sidecar storage moves .metadata.json into a mirror tree, so
the Location link in the model modal could no longer reveal a model's
sidecar. The Location row now shows an inline metadata icon button
(centralized mode only) that calls a new
POST /api/lm/models/open-sidecar-location endpoint: the backend resolves
the sidecar through py/utils/sidecar_paths, reveals the .metadata.json
selected in the file manager (falling back to the sidecar directory when
it has not been written yet), and returns the path for clipboard mode on
headless/Docker sessions. The platform reveal logic is factored into a
shared FileSystemHandler._reveal_file helper. All 9 locales translated.

locales/de.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Auf Hugging Face ansehen",
                 "viewCreatorProfile": "Ersteller-Profil anzeigen",
                 "openFileLocation": "Dateispeicherort öffnen",
+                "openSidecarLocation": "Metadaten-Speicherort öffnen",
                 "sendToWorkflow": "An ComfyUI senden",
                 "sendToWorkflowText": "An ComfyUI senden",
                 "copyHash": "Hash kopieren",
@@ -1905,6 +1906,12 @@
                 "copied": "Pfad in die Zwischenablage kopiert: {{path}}",
                 "clipboardFallback": "Pfad: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "Metadaten-Speicherort erfolgreich geöffnet",
+                "failed": "Fehler beim Öffnen des Metadaten-Speicherorts",
+                "copied": "Pfad in die Zwischenablage kopiert: {{path}}",
+                "clipboardFallback": "Pfad: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "Kann nicht an ComfyUI senden: Kein Dateipfad verfügbar"
             },

locales/en.json

@@ -1892,6 +1892,7 @@
         "viewOnHuggingFaceText": "View on Hugging Face",
         "viewCreatorProfile": "View Creator Profile",
         "openFileLocation": "Open File Location",
+        "openSidecarLocation": "Open metadata location",
         "sendToWorkflow": "Send to ComfyUI",
         "sendToWorkflowText": "Send to ComfyUI",
         "copyHash": "Copy hash",
@@ -1905,6 +1906,12 @@
         "copied": "Path copied to clipboard: {{path}}",
         "clipboardFallback": "Path: {{path}}"
       },
+      "openSidecarLocation": {
+        "success": "Metadata location opened successfully",
+        "failed": "Failed to open metadata location",
+        "copied": "Path copied to clipboard: {{path}}",
+        "clipboardFallback": "Path: {{path}}"
+      },
       "sendToWorkflow": {
         "noFilePath": "Unable to send to ComfyUI: No file path available"
       },

locales/es.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Ver en Hugging Face",
                 "viewCreatorProfile": "Ver perfil del creador",
                 "openFileLocation": "Abrir ubicación del archivo",
+                "openSidecarLocation": "Abrir ubicación de los metadatos",
                 "sendToWorkflow": "Enviar a ComfyUI",
                 "sendToWorkflowText": "Enviar a ComfyUI",
                 "copyHash": "Copiar hash",
@@ -1905,6 +1906,12 @@
                 "copied": "Ruta copiada al portapapeles: {{path}}",
                 "clipboardFallback": "Ruta: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "Ubicación de los metadatos abierta exitosamente",
+                "failed": "Error al abrir la ubicación de los metadatos",
+                "copied": "Ruta copiada al portapapeles: {{path}}",
+                "clipboardFallback": "Ruta: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "No se puede enviar a ComfyUI: no hay ruta de archivo disponible"
             },

locales/fr.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Voir sur Hugging Face",
                 "viewCreatorProfile": "Voir le profil du créateur",
                 "openFileLocation": "Ouvrir l'emplacement du fichier",
+                "openSidecarLocation": "Ouvrir l'emplacement des métadonnées",
                 "sendToWorkflow": "Envoyer vers ComfyUI",
                 "sendToWorkflowText": "Envoyer vers ComfyUI",
                 "copyHash": "Copier le hash",
@@ -1905,6 +1906,12 @@
                 "copied": "Chemin copié dans le presse-papiers: {{path}}",
                 "clipboardFallback": "Chemin: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "Emplacement des métadonnées ouvert avec succès",
+                "failed": "Échec de l'ouverture de l'emplacement des métadonnées",
+                "copied": "Chemin copié dans le presse-papiers: {{path}}",
+                "clipboardFallback": "Chemin: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "Impossible d'envoyer vers ComfyUI : aucun chemin de fichier disponible"
             },

locales/he.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "צפייה ב-Hugging Face",
                 "viewCreatorProfile": "הצג פרופיל יוצר",
                 "openFileLocation": "פתח מיקום קובץ",
+                "openSidecarLocation": "פתח מיקום מטא-נתונים",
                 "sendToWorkflow": "שלח ל-ComfyUI",
                 "sendToWorkflowText": "שלח ל-ComfyUI",
                 "copyHash": "העתק hash",
@@ -1905,6 +1906,12 @@
                 "copied": "הנתיב הועתק ללוח העריכה: {{path}}",
                 "clipboardFallback": "נתיב: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "מיקום המטא-נתונים נפתח בהצלחה",
+                "failed": "פתיחת מיקום המטא-נתונים נכשלה",
+                "copied": "הנתיב הועתק ללוח העריכה: {{path}}",
+                "clipboardFallback": "נתיב: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "לא ניתן לשלוח ל-ComfyUI: אין נתיב קובץ זמין"
             },

locales/ja.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Hugging Face で見る",
                 "viewCreatorProfile": "作成者プロフィールを表示",
                 "openFileLocation": "ファイルの場所を開く",
+                "openSidecarLocation": "メタデータの場所を開く",
                 "sendToWorkflow": "ComfyUI に送信",
                 "sendToWorkflowText": "ComfyUI に送信",
                 "copyHash": "ハッシュをコピー",
@@ -1905,6 +1906,12 @@
                 "copied": "パスをクリップボードにコピーしました: {{path}}",
                 "clipboardFallback": "パス: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "メタデータの場所を正常に開きました",
+                "failed": "メタデータの場所を開くのに失敗しました",
+                "copied": "パスをクリップボードにコピーしました: {{path}}",
+                "clipboardFallback": "パス: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "ComfyUI に送信できません：ファイルパスがありません"
             },

locales/ko.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Hugging Face에서 보기",
                 "viewCreatorProfile": "제작자 프로필 보기",
                 "openFileLocation": "파일 위치 열기",
+                "openSidecarLocation": "메타데이터 위치 열기",
                 "sendToWorkflow": "ComfyUI로 보내기",
                 "sendToWorkflowText": "ComfyUI로 보내기",
                 "copyHash": "해시 복사",
@@ -1905,6 +1906,12 @@
                 "copied": "경로가 클립보드에 복사되었습니다: {{path}}",
                 "clipboardFallback": "경로: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "메타데이터 위치가 성공적으로 열렸습니다",
+                "failed": "메타데이터 위치 열기에 실패했습니다",
+                "copied": "경로가 클립보드에 복사되었습니다: {{path}}",
+                "clipboardFallback": "경로: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "ComfyUI로 보낼 수 없습니다: 파일 경로가 없습니다"
             },

locales/ru.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "Открыть Hugging Face",
                 "viewCreatorProfile": "Посмотреть профиль создателя",
                 "openFileLocation": "Открыть расположение файла",
+                "openSidecarLocation": "Открыть расположение метаданных",
                 "sendToWorkflow": "Отправить в ComfyUI",
                 "sendToWorkflowText": "Отправить в ComfyUI",
                 "copyHash": "Копировать хеш",
@@ -1905,6 +1906,12 @@
                 "copied": "Путь скопирован в буфер обмена: {{path}}",
                 "clipboardFallback": "Путь: {{path}}"
             },
+            "openSidecarLocation": {
+                "success": "Расположение метаданных успешно открыто",
+                "failed": "Не удалось открыть расположение метаданных",
+                "copied": "Путь скопирован в буфер обмена: {{path}}",
+                "clipboardFallback": "Путь: {{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "Невозможно отправить в ComfyUI: путь к файлу недоступен"
             },

locales/zh-CN.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "在 Hugging Face 查看",
                 "viewCreatorProfile": "查看创作者主页",
                 "openFileLocation": "打开文件位置",
+                "openSidecarLocation": "打开元数据位置",
                 "sendToWorkflow": "发送到 ComfyUI",
                 "sendToWorkflowText": "发送到 ComfyUI",
                 "copyHash": "复制哈希值",
@@ -1905,6 +1906,12 @@
                 "copied": "路径已复制到剪贴板：{{path}}",
                 "clipboardFallback": "路径：{{path}}"
             },
+            "openSidecarLocation": {
+                "success": "元数据位置已成功打开",
+                "failed": "打开元数据位置失败",
+                "copied": "路径已复制到剪贴板：{{path}}",
+                "clipboardFallback": "路径：{{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "无法发送到 ComfyUI：没有可用的文件路径"
             },

locales/zh-TW.json

@@ -1892,6 +1892,7 @@
                 "viewOnHuggingFaceText": "在 Hugging Face 查看",
                 "viewCreatorProfile": "查看創作者個人檔案",
                 "openFileLocation": "開啟檔案位置",
+                "openSidecarLocation": "開啟中繼資料位置",
                 "sendToWorkflow": "傳送到 ComfyUI",
                 "sendToWorkflowText": "傳送到 ComfyUI",
                 "copyHash": "複製雜湊值",
@@ -1905,6 +1906,12 @@
                 "copied": "路徑已複製到剪貼簿：{{path}}",
                 "clipboardFallback": "路徑：{{path}}"
             },
+            "openSidecarLocation": {
+                "success": "中繼資料位置已成功開啟",
+                "failed": "開啟中繼資料位置失敗",
+                "copied": "路徑已複製到剪貼簿：{{path}}",
+                "clipboardFallback": "路徑：{{path}}"
+            },
             "sendToWorkflow": {
                 "noFilePath": "無法傳送到 ComfyUI：沒有可用的檔案路徑"
             },