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',

frontend/src/i18n/locales/zh.ts

@@ -941,7 +941,8 @@ export default {
         anthropic: 'Anthropic',
         openai: 'OpenAI',
         gemini: 'Gemini',
-        antigravity: 'Antigravity'
+        antigravity: 'Antigravity',
+        sora: 'Sora'
       },
       saving: '保存中...',
       noGroups: '暂无分组',
@@ -995,6 +996,14 @@ export default {
         title: '图片生成计费',
         description: '配置 gemini-3-pro-image 模型的图片生成价格，留空则使用默认价格'
       },
+      soraPricing: {
+        title: 'Sora 按次计费',
+        description: '配置 Sora 图片/视频按次收费价格，留空则默认不计费',
+        image360: '图片 360px ($)',
+        image540: '图片 540px ($)',
+        video: '视频（标准）($)',
+        videoHd: '视频（Pro-HD）($)'
+      },
       claudeCode: {
         title: 'Claude Code 客户端限制',
         tooltip: '启用后，此分组仅允许 Claude Code 官方客户端访问。非 Claude Code 请求将被拒绝或降级到指定分组。',
@@ -1199,7 +1208,8 @@ export default {
         openai: 'OpenAI',
         anthropic: 'Anthropic',
         gemini: 'Gemini',
-        antigravity: 'Antigravity'
+        antigravity: 'Antigravity',
+        sora: 'Sora'
       },
       types: {
         oauth: 'OAuth',
@@ -1391,6 +1401,9 @@ export default {
       mapRequestModels: '将请求模型映射到实际模型。左边是请求的模型，右边是发送到 API 的实际模型。',
       selectedModels: '已选择 {count} 个模型',
       supportsAllModels: '（支持所有模型）',
+      soraModelsLoadFailed: '加载 Sora 模型列表失败，已回退到默认列表',
+      soraModelsLoading: '正在加载 Sora 模型...',
+      soraModelsRetry: '加载失败，点击重试',
       requestModel: '请求模型',
       actualModel: '实际模型',
       addMapping: '添加映射',