feat: allow delete-chat API in demo mode (casibase#1441)

Author: IsAurora6

routers/authz_filter.go

@@ -45,7 +45,7 @@ func isAllowedInDemoMode(method string, urlPath string) bool {
 		return true
 	}
 
-	if strings.HasPrefix(urlPath, "/api/signin") || urlPath == "/api/signout" || urlPath == "/api/add-chat" || urlPath == "/api/add-message" || urlPath == "/api/update-message" || urlPath == "/api/delete-welcome-message" || urlPath == "/api/generate-text-to-speech-audio" || urlPath == "/api/add-node-tunnel" || urlPath == "/api/start-session" || urlPath == "/api/stop-session" || urlPath == "/api/commit-record" || urlPath == "/api/commit-record-second" || urlPath == "/api/update-chat" {
+	if strings.HasPrefix(urlPath, "/api/signin") || urlPath == "/api/signout" || urlPath == "/api/add-chat" || urlPath == "/api/add-message" || urlPath == "/api/update-message" || urlPath == "/api/delete-welcome-message" || urlPath == "/api/generate-text-to-speech-audio" || urlPath == "/api/add-node-tunnel" || urlPath == "/api/start-session" || urlPath == "/api/stop-session" || urlPath == "/api/commit-record" || urlPath == "/api/commit-record-second" || urlPath == "/api/update-chat" || urlPath == "/api/delete-chat" {
 		return true
 	}