feat: 支持运行中 steer command

src/common/validation.ts

@@ -215,12 +215,21 @@ function validateBackendSecretScope(backendProfile: BackendProfile, executionPol
 export function validateCreateCommand(input: unknown): CreateCommandInput {
   const record = asRecord(input, "command");
   const type = requiredString(record, "type");
-  if (type !== "turn" && type !== "interrupt") throw new AgentRunError("schema-invalid", `command type ${type} is not supported`, { httpStatus: 400 });
+  if (type !== "turn" && type !== "steer" && type !== "interrupt") throw new AgentRunError("schema-invalid", `command type ${type} is not supported`, { httpStatus: 400 });
   const payload = asRecord(record.payload ?? {}, "payload");
+  if (type === "steer" && !steerPrompt(payload)) throw new AgentRunError("schema-invalid", "steer command payload requires a non-empty prompt, message, or text", { httpStatus: 400 });
   const idempotencyKey = typeof record.idempotencyKey === "string" && record.idempotencyKey.trim().length > 0 ? record.idempotencyKey.trim() : undefined;
   return { type, payload, ...(idempotencyKey ? { idempotencyKey } : {}) };
 }
 
+function steerPrompt(payload: JsonRecord): string | null {
+  for (const key of ["prompt", "message", "text"]) {
+    const value = payload[key];
+    if (typeof value === "string" && value.trim().length > 0) return value.trim();
+  }
+  return null;
+}
+
 export function validateCreateQueueTask(input: unknown): CreateQueueTaskInput {
   const record = asRecord(input, "queueTask");
   const tenantId = requiredString(record, "tenantId");