fix: always expose DC-prefixed errors to users in safeErrorMessage

dashcaddy-api/src/utils/logging.js

@@ -97,6 +97,9 @@ function safeErrorMessage(error) {
   if (!error) return 'An internal error occurred';
   const msg = error.message || String(error);
 
+  // Always expose DC-prefixed user-facing errors
+  if (/\[DC-\d+\]/.test(msg)) return msg;
+
   // Detect port conflict errors
   const portMatch = msg.match(/exposing port TCP [^:]*:(\d+)/);
   if (portMatch || msg.includes('port is already allocated') || msg.includes('ports are not available')) {
@@ -104,7 +107,7 @@ function safeErrorMessage(error) {
     return `[DC-200] Port ${port} is already in use. Try a different port or stop the service using that port first.`;
   }
 
-  // Only expose short, user-facing messages
+  // Only expose short, user-facing messages (no paths, stack traces, or internal details)
   if (msg.length < 200 && !msg.includes('/') && !msg.includes('\\') && !msg.includes(' at ')) {
     return msg;
   }