feat: support modelark model platform to call seed 1.8

backend/app/model/chat.py

@@ -36,6 +36,7 @@ McpServers = dict[Literal["mcpServers"], dict[str, dict]]
 
 PLATFORM_MAPPING = {
     "Z.ai": "openai-compatible-model",
+    "ModelArk": "openai-compatible-model",
 }
 
 class Chat(BaseModel):

src/lib/llm.ts

@@ -73,6 +73,15 @@ export const INIT_PROVODERS: Provider[] = [
     is_valid: false,
     model_type: ""
   },
+  {
+    id: 'ModelArk',
+    name: 'ModelArk',
+    apiKey: '',
+    apiHost: 'https://ark.ap-southeast.bytepluses.com/api/v3',
+    description: "ModelArk model configuration.",
+    is_valid: false,
+    model_type: ""
+  },
   {
     id: 'aws-bedrock',
     name: 'AWS Bedrock',