Fix local-column status dots always showing gray on the standby

get_local_backups_with_status() called _load_local_sidecars() directly,
which is a plain glob.glob('/root/backups/*.tar.gz.meta.json') with no
SSH-fallback awareness at all — unlike get_local_backups() itself (fixed
earlier this session) and _fetch_vm_sidecars() (already had this pattern
from day one). On the standby, /root/backups doesn't exist locally, so
the glob silently returned {} and every local-column entry fell through
to the 'unknown' (gray) default regardless of its real status, while the
VM column worked correctly since _fetch_vm_sidecars() already had the
fallback.

Added _fetch_local_sidecars() mirroring _fetch_vm_sidecars()'s exact
local-dir-first-else-SSH pattern, targeting /root/backups on the main
server via the now-working tunnel instead of the VM's own backup dir.

Verified on the live standby: local column now shows green for backups
with a sidecar and gray only for the legacine ones that genuinely
predate the sidecar feature (documented, intended behavior) — not gray
across the board.

platform/modules/backups.py

@@ -241,8 +241,26 @@ def _with_status(names, sidecars):
     return result
 
 
+def _fetch_local_sidecars():
+    """Same local-dir-first-else-SSH pattern as _fetch_vm_sidecars() below,
+    but for /root/backups on the main server. _load_local_sidecars() alone
+    has no such fallback — a plain glob.glob() against a hardcoded path —
+    so on the standby (where /root/backups doesn't exist locally at all)
+    it silently returned {}, and every local-column status dot rendered as
+    gray/unknown regardless of the backup's real status."""
+    if os.path.isdir('/root/backups'):
+        return _load_local_sidecars('/root/backups')
+    cmd = (
+        "for f in /root/backups/*.tar.gz.meta.json; do "
+        "[ -f \"$f\" ] && echo \"===META:$(basename \"$f\")===\" && cat \"$f\"; "
+        "done 2>/dev/null"
+    )
+    stdout, _ = _ssh_main(cmd, timeout=25)
+    return _parse_vm_sidecars(stdout)
+
+
 def get_local_backups_with_status():
-    return _with_status(get_local_backups(), _load_local_sidecars())
+    return _with_status(get_local_backups(), _fetch_local_sidecars())
 
 
 def get_vm_backups_with_status():