feat: add Tencent Cloud Coding Plan support and handle coding plan URLs in OpenAI adaptor

constant/channel.go

@@ -206,4 +206,8 @@ var ChannelSpecialBases = map[string]ChannelSpecialBase{
 		ClaudeBaseURL: "https://ark.cn-beijing.volces.com/api/coding",
 		OpenAIBaseURL: "https://ark.cn-beijing.volces.com/api/coding/v3",
 	},
+	"tencent-coding-plan": {
+		ClaudeBaseURL: "https://api.lkeap.cloud.tencent.com/coding",
+		OpenAIBaseURL: "https://api.lkeap.cloud.tencent.com/coding/v3",
+	},
 }

controller/channel_upstream_update.go

@@ -312,8 +312,12 @@ func fetchChannelUpstreamModelIDs(channel *model.Channel) ([]string, error) {
 			url = fmt.Sprintf("%s/v1/models", baseURL)
 		}
 	default:
+		if plan, ok := constant.ChannelSpecialBases[baseURL]; ok && plan.OpenAIBaseURL != "" {
+			url = fmt.Sprintf("%s/models", plan.OpenAIBaseURL)
+		} else {
 			url = fmt.Sprintf("%s/v1/models", baseURL)
 		}
+	}
 
 	key, _, apiErr := channel.GetNextEnabledKey()
 	if apiErr != nil {

relay/channel/openai/adaptor.go

@@ -164,6 +164,20 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 		url = strings.Replace(url, "{model}", info.UpstreamModelName, -1)
 		return url, nil
 	default:
+		// Handle coding plan special base URLs
+		if specialPlan, ok := constant.ChannelSpecialBases[info.ChannelBaseUrl]; ok && specialPlan.OpenAIBaseURL != "" {
+			if info.RelayFormat == types.RelayFormatClaude {
+				return fmt.Sprintf("%s/v1/messages", specialPlan.ClaudeBaseURL), nil
+			}
+			switch info.RelayMode {
+			case relayconstant.RelayModeEmbeddings:
+				return fmt.Sprintf("%s/embeddings", specialPlan.OpenAIBaseURL), nil
+			case relayconstant.RelayModeImagesGenerations:
+				return fmt.Sprintf("%s/images/generations", specialPlan.OpenAIBaseURL), nil
+			default:
+				return fmt.Sprintf("%s/chat/completions", specialPlan.OpenAIBaseURL), nil
+			}
+		}
 		if (info.RelayFormat == types.RelayFormatClaude || info.RelayFormat == types.RelayFormatGemini) &&
 			info.RelayMode != relayconstant.RelayModeResponses &&
 			info.RelayMode != relayconstant.RelayModeResponsesCompact {