fix: update ui double string

apps/desktop/src/components/update-status.tsx

@@ -94,14 +94,10 @@ function ordinaryUpdateStatus({ apply, checking, status, target, u }: UpdateStat
   }
 
   if (status?.error) {
-    // A git that never ran is a local problem; leading with "couldn't reach
-    // the update server" would misdiagnose it as a network failure.
-    const prefix = status.error === 'git-unusable' ? '' : u.cantReach
-
     return {
       applying,
       error: [status.message, status.error].filter(l => !!l).join('\n'),
-      line: [prefix, status.message].filter(Boolean).join(' '),
+      line: u.cantReach,
       supported,
       tone: 'error',
       updateAvailable