添加模型支持，更新提示功能以接收模型参数

src/runtime/opencode.ts

@@ -12,6 +12,11 @@ export type RuntimeHealth = {
   version: string;
 };
 
+type RuntimeModelOverride = {
+  providerID: string;
+  modelID: string;
+};
+
 export class OpencodeRuntimeAdapter {
   private clientPromise: Promise<OpencodeClient> | null = null;
   private closeServer: (() => void) | null = null;
@@ -52,10 +57,11 @@ export class OpencodeRuntimeAdapter {
     return this.messages(sessionId);
   }
 
-  async prompt(sessionId: string, text: string) {
+  async prompt(sessionId: string, text: string, model?: RuntimeModelOverride) {
     const client = await this.ensureClient();
     await client.session.prompt({
       sessionID: sessionId,
+      model,
       parts: [{ type: "text", text }],
     });
   }