Dont duplicate interfaces on port change

startos/interfaces.ts

@@ -99,5 +99,23 @@ export const setInterfaces = sdk.setupInterfaces(async ({ effects }) => {
     receipts.push(await tlsOrigin.export([stratumTls]))
   }
 
+  // Drop bindings we no longer use. `bindPort` registers a binding per
+  // (hostId, internalPort) and nothing removes the old one when the user
+  // changes a port in Configure — the stale binding lingers and the OS lists
+  // its interface again, so the UI shows two identical "Stratum" entries (and
+  // keeps a forward open on the abandoned port). Packages with fixed ports
+  // never hit this; ours has user-configurable ports, so it must clean up
+  // after itself. Runs last, after the current bindings exist, so the `except`
+  // list is exactly what we just bound.
+  await sdk.clearBindings(effects, {
+    except: [
+      { id: uiHostId, internalPort: uiPort },
+      { id: stratumHostId, internalPort: stratumPort },
+      ...(ports?.tlsEnabled
+        ? [{ id: stratumTlsHostId, internalPort: stratumTlsPort }]
+        : []),
+    ],
+  })
+
   return receipts
 })