feat: Add custom model download functionality and enhance model management

- Implemented `model-download-custom` command to download HuggingFace models.
- Added support for discovering manually placed models in the cache.
- Enhanced the model list view to display recommended and discovered models separately.
- Introduced JSON editor for direct configuration mode in API settings.
- Added validation and formatting features for JSON input.
- Updated translations for new API settings and common actions.
- Improved user interface for model management, including action buttons and tooltips.

ccw/src/templates/dashboard-js/i18n.js

@@ -28,6 +28,7 @@ const i18n = {
     'common.deleteFailed': 'Delete failed',
     'common.retry': 'Retry',
     'common.refresh': 'Refresh',
+    'common.format': 'Format',
     'common.back': 'Back',
     'common.search': 'Search...',
     'common.minutes': 'minutes',
@@ -1771,6 +1772,14 @@ const i18n = {
     'apiSettings.settingsFilePath': 'Settings File Path',
     'apiSettings.nameRequired': 'Name is required',
     'apiSettings.status': 'Status',
+    'apiSettings.providerBinding': 'Provider Binding',
+    'apiSettings.directConfig': 'Direct Configuration',
+    'apiSettings.modelConfig': 'Model Configuration',
+    'apiSettings.configJson': 'Configuration JSON',
+    'apiSettings.syncToJson': 'Sync to JSON',
+    'apiSettings.jsonEditorHint': 'Edit JSON directly to add advanced settings',
+    'apiSettings.jsonValid': 'Valid JSON',
+    'apiSettings.jsonInvalid': 'Invalid JSON',
 
     // Model Pools (High Availability)
     'apiSettings.modelPools': 'Model Pools',
@@ -2153,6 +2162,7 @@ const i18n = {
     'common.deleteFailed': '删除失败',
     'common.retry': '重试',
     'common.refresh': '刷新',
+    'common.format': '格式化',
     'common.back': '返回',
     'common.search': '搜索...',
     'common.minutes': '分钟',
@@ -3906,6 +3916,14 @@ const i18n = {
     'apiSettings.nameRequired': '名称为必填项',
     'apiSettings.tokenRequired': 'API 令牌为必填项',
     'apiSettings.status': '状态',
+    'apiSettings.providerBinding': '供应商绑定',
+    'apiSettings.directConfig': '直接配置',
+    'apiSettings.modelConfig': '模型配置',
+    'apiSettings.configJson': '配置 JSON',
+    'apiSettings.syncToJson': '同步到 JSON',
+    'apiSettings.jsonEditorHint': '直接编辑 JSON 添加高级配置',
+    'apiSettings.jsonValid': 'JSON 有效',
+    'apiSettings.jsonInvalid': 'JSON 无效',
 
     // Model Pools (High Availability)
     'apiSettings.modelPools': '高可用',