feat: add video channel kling

relay/constant/relay_mode.go

@@ -38,6 +38,9 @@ const (
 	RelayModeSunoFetchByID
 	RelayModeSunoSubmit
 
+	RelayModeKlingFetchByID
+	RelayModeKlingSubmit
+
 	RelayModeRerank
 
 	RelayModeResponses
@@ -133,3 +136,13 @@ func Path2RelaySuno(method, path string) int {
 	}
 	return relayMode
 }
+
+func Path2RelayKling(method, path string) int {
+	relayMode := RelayModeUnknown
+	if method == http.MethodPost && strings.HasSuffix(path, "/video/generations") {
+		relayMode = RelayModeKlingSubmit
+	} else if method == http.MethodGet && strings.Contains(path, "/video/generations/") {
+		relayMode = RelayModeKlingFetchByID
+	}
+	return relayMode
+}