Fix vdev parsing: use leading whitespace count instead of tab count

services/zfs.py

@@ -59,11 +59,11 @@ async def get_zfs_pool_map() -> dict[str, dict]:
             if not in_config or not current_pool:
                 continue
 
-            # Count leading tab depth to distinguish pool/vdev/device lines.
-            # Pool name = 1 tab, vdev = 2 tabs, device = 3+ tabs
-            tab_count = len(line) - len(line.lstrip('\t'))
+            # Indentation: 1 tab = pool name, 1 tab + 2 spaces = vdev,
+            # 1 tab + 4 spaces = device. Count chars before content.
+            leading = len(line) - len(line.lstrip())
 
-            if tab_count == 2 and "/dev/" not in stripped:
+            if "/dev/" not in stripped and leading == 3:
                 # This is a vdev line (mirror-0, raidz2-0, etc.)
                 current_vdev = stripped.split()[0]
             elif "/dev/" in stripped: