feat: add batch task approval settings and fix modal dropdown scrolling

internal/handler/batch_hitl.go

@@ -0,0 +1,28 @@
+package handler
+
+import "fmt"
+
+// Empty policy preserves the global defaults for queues created before this setting existed.
+func validateBatchHITLPolicy(policy string) error {
+	switch policy {
+	case "", "off", "human", "audit_agent", "review_edit":
+		return nil
+	default:
+		return fmt.Errorf("不支持的队列审批设置: %s", policy)
+	}
+}
+
+func (h *AgentHandler) batchHITLRequest(policy string) *HITLRequest {
+	req := h.hitlEffectiveDefaultRequest()
+	switch policy {
+	case "off":
+		req.Enabled, req.Mode = false, "off"
+	case "human":
+		req.Enabled, req.Mode, req.Reviewer = true, "approval", "human"
+	case "audit_agent":
+		req.Enabled, req.Mode, req.Reviewer = true, "approval", "audit_agent"
+	case "review_edit":
+		req.Enabled, req.Mode, req.Reviewer = true, "review_edit", "audit_agent"
+	}
+	return req
+}