发布 0.3.0：恢复 Chat 接口并增强云端事件通知

internal/service/airesponses.go

@@ -73,12 +73,20 @@ func RespPassthroughUsage(payload []byte) *aiwire.Usage {
 	var root struct {
 		Usage *aiwire.RespUsage `json:"usage"`
 	}
-	if json.Unmarshal(payload, &root) != nil || root.Usage == nil {
+	if json.Unmarshal(payload, &root) != nil {
 		return nil
 	}
-	usage := &aiwire.Usage{PromptTokens: root.Usage.InputTokens,
-		CompletionTokens: root.Usage.OutputTokens, TotalTokens: root.Usage.TotalTokens}
-	if cached := root.Usage.InputTokensDetails.CachedTokens; cached > 0 {
+	return usageFromResp(root.Usage)
+}
+
+// usageFromResp 换算 Responses usage 为 OpenAI 口径(缓存命中透传);nil 原样返回。
+func usageFromResp(u *aiwire.RespUsage) *aiwire.Usage {
+	if u == nil {
+		return nil
+	}
+	usage := &aiwire.Usage{PromptTokens: u.InputTokens,
+		CompletionTokens: u.OutputTokens, TotalTokens: u.TotalTokens}
+	if cached := u.InputTokensDetails.CachedTokens; cached > 0 {
 		usage.PromptTokensDetails = &aiwire.PromptTokensDetails{CachedTokens: cached}
 	}
 	return usage