fix: harden server start/stop guards

1 files changed, 12 insertions, 3 deletions

diff --git a/app/backends/probe.py b/app/backends/probe.py
index efa2963..ada143a 100644
--- a/app/backends/probe.py
+++ b/app/backends/probe.py
@@ -108,11 +108,20 @@ def _identify_gradio(base: str, timeout: float) -> Optional[str]:
     return None
 
 
+def _canonical_host(host: str) -> str:
+    """Fold the loopback aliases so "localhost" and "127.0.0.1" compare equal."""
+    return "127.0.0.1" if host in ("localhost", "::1", "[::1]") else host
+
+
 def same_endpoint(url_a: str, url_b: str) -> bool:
     """True when URL_A and URL_B address the same host and port.
 
     Scheme and path are ignored (127.0.0.1:8080 and http://127.0.0.1:8080/
-    are the same server). Returns False when either URL is empty/unparsable.
+    are the same server), and the loopback names are folded together
+    ("localhost:8080" equals "127.0.0.1:8080") — the config's remote-URL
+    defaults point at the managed servers, so a user writing either form
+    must not get their own server double-counted as "[remote]".
+    Returns False when either URL is empty/unparsable.
     """
     if not url_a or not url_b:
         return False
@@ -121,8 +130,8 @@ def same_endpoint(url_a: str, url_b: str) -> bool:
         b = urllib.parse.urlsplit(url_b)
     except ValueError:
         return False
-    host_a = a.hostname or "127.0.0.1"
-    host_b = b.hostname or "127.0.0.1"
+    host_a = _canonical_host(a.hostname or "127.0.0.1")
+    host_b = _canonical_host(b.hostname or "127.0.0.1")
     port_a = a.port or (443 if (a.scheme or "http") == "https" else 80)
     port_b = b.port or (443 if (b.scheme or "http") == "https" else 80)
     return host_a == host_b and port_a == port_b