AdminSettings: show error message when location fetch fails

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/AdminSettings.tsx

@@ -110,6 +110,7 @@ function IntegrationCard({ integration, onSaved }: { integration: Integration; o
   const [enabled, setEnabled] = useState(integration.enabled)
   const [wfLocations, setWfLocations] = useState<{ id: string; name: string; short_name: string | null }[]>([])
   const [fetchingLocs, setFetchingLocs] = useState(false)
+  const [locError, setLocError] = useState<string | null>(null)
 
   function openForm() {
     const initial: Record<string, string> = {}
@@ -212,9 +213,17 @@ function IntegrationCard({ integration, onSaved }: { integration: Integration; o
                       <button
                         onClick={async () => {
                           setFetchingLocs(true)
+                          setLocError(null)
                           try {
                             const res = await fetch('/settings/api/integrations/workforce/locations', { credentials: 'include' })
-                            if (res.ok) setWfLocations(await res.json())
+                            if (res.ok) {
+                              setWfLocations(await res.json())
+                            } else {
+                              const data = await res.json().catch(() => ({}))
+                              setLocError(data.error || `Error ${res.status}`)
+                            }
+                          } catch {
+                            setLocError('Network error')
                           } finally { setFetchingLocs(false) }
                         }}
                         disabled={fetchingLocs}
@@ -229,6 +238,9 @@ function IntegrationCard({ integration, onSaved }: { integration: Integration; o
                         {fetchingLocs ? 'Fetching…' : 'Fetch locations'}
                       </button>
                     </div>
+                    {locError && (
+                      <div style={{ fontSize: '0.78rem', color: '#dc2626', marginTop: '0.35rem' }}>{locError}</div>
+                    )}
                   </div>
                 )
               }