feat(compute): 补齐媒体生成 provider 能力声明（Seedream/Seedance/快乐马） (#34)

- volcengine：services 增 image_gen/video_gen；新增 doubao-seedream-4-0-250828（真 img2img/多图融合）与 doubao-seedance-2-0-260128（多素材视频）模型
- dashscope：新增快乐马 happyhorse-1.0-t2v/i2v/r2v 视频模型
- service-map：默认 image_gen→minimax/image-01、video_gen→minimax/MiniMax-Hailuo-2.3（指向已有内置工具适配器的后端）

使算力配置 UI 能展示这些 provider 的图像/视频能力标签与模型，用户填 key 时即可显式知晓其用途。

compute/providers/dashscope.json

@@ -689,6 +689,78 @@
       "defaultTemperature": 0.65,
       "defaultTopP": 0.8,
       "extra": {}
+    },
+    {
+      "modelName": "happyhorse-1.0-t2v",
+      "displayName": "快乐马 1.0 文生视频",
+      "serviceType": [
+        "video_gen"
+      ],
+      "description": "阿里 HappyHorse 文生视频，原生音视频联合生成，最长 15s，支持多语种口型",
+      "capabilities": [
+        "video_generation",
+        "text_to_video",
+        "chinese_optimized",
+        "high_quality"
+      ],
+      "extra": {
+        "endpoint": "/services/aigc/video-generation/video-synthesis",
+        "asyncHeader": "X-DashScope-Async",
+        "taskQueryEndpoint": "/tasks",
+        "maxVideoDuration": 15,
+        "supportedResolutions": [
+          "720P",
+          "1080P"
+        ]
+      }
+    },
+    {
+      "modelName": "happyhorse-1.0-i2v",
+      "displayName": "快乐马 1.0 图生视频",
+      "serviceType": [
+        "video_gen"
+      ],
+      "description": "阿里 HappyHorse 图生视频（首帧），宽高比自动跟随输入首帧",
+      "capabilities": [
+        "video_generation",
+        "image_to_video",
+        "chinese_optimized"
+      ],
+      "extra": {
+        "endpoint": "/services/aigc/video-generation/video-synthesis",
+        "asyncHeader": "X-DashScope-Async",
+        "taskQueryEndpoint": "/tasks",
+        "maxVideoDuration": 15,
+        "supportedResolutions": [
+          "720P",
+          "1080P"
+        ]
+      }
+    },
+    {
+      "modelName": "happyhorse-1.0-r2v",
+      "displayName": "快乐马 1.0 参考生视频",
+      "serviceType": [
+        "video_gen"
+      ],
+      "description": "阿里 HappyHorse 参考生视频，支持最多 9 张参考图（多主体/元素一致性）",
+      "capabilities": [
+        "video_generation",
+        "reference_to_video",
+        "multi_image",
+        "chinese_optimized"
+      ],
+      "extra": {
+        "endpoint": "/services/aigc/video-generation/video-synthesis",
+        "asyncHeader": "X-DashScope-Async",
+        "taskQueryEndpoint": "/tasks",
+        "maxReferenceImages": 9,
+        "maxVideoDuration": 15,
+        "supportedResolutions": [
+          "720P",
+          "1080P"
+        ]
+      }
     }
   ]
 }

compute/providers/volcengine.json

@@ -17,7 +17,9 @@
     "voice_clone",
     "realtime_voice",
     "simultaneous_interpret",
-    "translation"
+    "translation",
+    "image_gen",
+    "video_gen"
   ],
   "models": [
     {
@@ -545,6 +547,58 @@
         "chinese_optimized"
       ],
       "extra": {}
+    },
+    {
+      "modelName": "doubao-seedream-4-0-250828",
+      "displayName": "豆包 Seedream 4.0（文生图/图生图）",
+      "serviceType": [
+        "image_gen"
+      ],
+      "description": "字节 Seedream 图像模型，支持文生图、图生图（img2img）、局部重绘与多图融合（最多 10 张参考图）；OpenAI 风格 /images/generations 同步返回",
+      "capabilities": [
+        "image_generation",
+        "image_to_image",
+        "multi_image_fusion",
+        "chinese_optimized",
+        "high_quality"
+      ],
+      "extra": {
+        "endpoint": "/images/generations",
+        "supportedSizes": [
+          "1K",
+          "2K",
+          "4K"
+        ],
+        "maxFusionImages": 10
+      }
+    },
+    {
+      "modelName": "doubao-seedance-2-0-260128",
+      "displayName": "豆包 Seedance 2.0（文生/图生视频）",
+      "serviceType": [
+        "video_gen"
+      ],
+      "description": "字节 Seedance 视频模型，支持文生视频、图生视频、多图参考、首尾帧、参考视频/音频（多模态），异步任务",
+      "capabilities": [
+        "video_generation",
+        "text_to_video",
+        "image_to_video",
+        "first_last_frame",
+        "reference_video",
+        "reference_audio",
+        "chinese_optimized",
+        "high_quality"
+      ],
+      "extra": {
+        "endpoint": "/contents/generations/tasks",
+        "maxVideoDuration": 15,
+        "supportedResolutions": [
+          "720p",
+          "1080p"
+        ],
+        "maxReferenceImages": 9,
+        "asyncMode": true
+      }
     }
   ]
 }

compute/service-map.json

@@ -40,12 +40,12 @@
     "providerId": "provider-openai-001"
   },
   "image_gen": {
-    "modelName": "dall-e-3",
+    "modelName": "image-01",
-    "providerId": "provider-openai-001"
+    "providerId": "provider-minimax-001"
   },
   "video_gen": {
-    "modelName": "kling-v2",
+    "modelName": "MiniMax-Hailuo-2.3",
-    "providerId": "provider-kling-001"
+    "providerId": "provider-minimax-001"
   },
   "omni": {
     "modelName": "gpt-4o-realtime",