Reorder group/server parsing and skip empty entries in config parser

app/app.py

@@ -60,26 +60,29 @@ def parse_infrastructure_conf():
                 stripped = line.strip()
                 if not stripped or stripped.startswith('#'):
                     continue
-                # Group header: no leading whitespace
-                if line[0] not in (' ', '\t'):
-                    current_group = stripped
-                    current_host = None
-                    continue
-                # Detect prefix: -- child VM, - host
+
+                # Server entry: starts with - or -- (with optional leading whitespace)
                 if stripped.startswith('--'):
                     is_child = True
                     rest = stripped[2:].strip()
                 elif stripped.startswith('-'):
                     is_child = False
                     rest = stripped[1:].strip()
+                elif line[0] not in (' ', '\t') and not stripped.startswith('-'):
+                    # Group header: no leading whitespace, no dash prefix
+                    current_group = stripped
+                    current_host = None
+                    continue
                 else:
-                    # Legacy: no dash prefix, treat as host
+                    # Legacy: indented without dash, treat as host
                     is_child = False
                     rest = stripped
 
                 parts = rest.split(None, 1)
                 entry = parts[0] if parts else ''
                 url = parts[1] if len(parts) > 1 else ''
+                if not entry:
+                    continue
                 if '@' in entry:
                     user, host = entry.split('@', 1)
                 else: