add missing body fields for z.ai

internal/upstream/client.go

@@ -190,18 +190,28 @@ func MakeUpstreamRequest(token string, messages []model.Message, modelName strin
 		upstreamMessages = append([]map[string]interface{}{systemUserMsg, systemAssistantMsg}, upstreamMessages...)
 	}
 
-	body := map[string]interface{}{
+body := map[string]interface{}{
 		"stream":           true,
 		"model":            targetModel,
 		"messages":         upstreamMessages,
 		"signature_prompt": latestUserContent,
 		"params":           map[string]interface{}{},
+		"extra":            map[string]interface{}{},
+		"variables":        map[string]interface{}{},
+		"background_tasks": map[string]interface{}{
+			"tags_generation":  true,
+			"title_generation": true,
+		},
 		"features": map[string]interface{}{
-			"image_generation": false,
-			"web_search":       false,
-			"auto_web_search":  autoWebSearch,
-			"preview_mode":     true,
-			"enable_thinking":  enableThinking,
+			"image_generation":    false,
+			"web_search":          false,
+			"auto_web_search":     autoWebSearch,
+			"preview_mode":        true,
+			"enable_thinking":     enableThinking,
+			"flags":               []interface{}{},
+			"vlm_tools_enable":    false,
+			"vlm_web_search_enable": false,
+			"vlm_website_mode":    false,
 		},
 		"chat_id": chatID,
 		"id":      uuid.New().String(),