fix for overview panel

internal/hoststats/disk_unix.go

@@ -0,0 +1,19 @@
+//go:build !windows
+
+package hoststats
+
+import "golang.org/x/sys/unix"
+
+// diskFreeBytes returns free (available to an unprivileged caller, not
+// counting reserved blocks) and total bytes for the filesystem containing
+// path. Mirrors internal/app/files/diskspace_unix.go's localDiskFreeBytes --
+// duplicated locally rather than exported cross-package since this is a
+// three-line syscall wrapper, not shared logic worth coupling two packages
+// over.
+func diskFreeBytes(path string) (free, total int64, err error) {
+	var st unix.Statfs_t
+	if err := unix.Statfs(path, &st); err != nil {
+		return 0, 0, err
+	}
+	return int64(st.Bavail) * int64(st.Bsize), int64(st.Blocks) * int64(st.Bsize), nil
+}