feat(Sora): 完成Sora网关接入与媒体能力

新增 Sora 网关路由、账号调度与同步服务\n补充媒体代理与签名 URL、模型列表动态拉取\n完善计费配置、前端支持与相关测试

frontend/src/i18n/locales/en.ts

@@ -895,7 +895,8 @@ export default {
         anthropic: 'Anthropic',
         openai: 'OpenAI',
         gemini: 'Gemini',
-        antigravity: 'Antigravity'
+        antigravity: 'Antigravity',
+        sora: 'Sora'
       },
       deleteConfirm:
         "Are you sure you want to delete '{name}'? All associated API keys will no longer belong to any group.",
@@ -920,6 +921,14 @@ export default {
         title: 'Image Generation Pricing',
         description: 'Configure pricing for gemini-3-pro-image model. Leave empty to use default prices.'
       },
+      soraPricing: {
+        title: 'Sora Per-Request Pricing',
+        description: 'Configure per-request pricing for Sora image/video generation. Leave empty to disable billing.',
+        image360: 'Image 360px ($)',
+        image540: 'Image 540px ($)',
+        video: 'Video (standard) ($)',
+        videoHd: 'Video (Pro-HD) ($)'
+      },
       claudeCode: {
         title: 'Claude Code Client Restriction',
         tooltip: 'When enabled, this group only allows official Claude Code clients. Non-Claude Code requests will be rejected or fallback to the specified group.',
@@ -1079,7 +1088,8 @@ export default {
         claude: 'Claude',
         openai: 'OpenAI',
         gemini: 'Gemini',
-        antigravity: 'Antigravity'
+        antigravity: 'Antigravity',
+        sora: 'Sora'
       },
       types: {
         oauth: 'OAuth',
@@ -1257,6 +1267,9 @@ export default {
         'Map request models to actual models. Left is the requested model, right is the actual model sent to API.',
       selectedModels: 'Selected {count} model(s)',
       supportsAllModels: '(supports all models)',
+      soraModelsLoadFailed: 'Failed to load Sora models, fallback to default list',
+      soraModelsLoading: 'Loading Sora models...',
+      soraModelsRetry: 'Load failed, click to retry',
       requestModel: 'Request model',
       actualModel: 'Actual model',
       addMapping: 'Add Mapping',