fix: reset-to-auto in both rip branches, visible mutation failures, distinct invalid-token error

web/src/pages/AddPage.tsx

@@ -10,6 +10,7 @@ function toErrorKind(err: unknown): ScanErrorKind {
   if (err instanceof ApiError) {
     if (err.code === 'not_found') return 'not_found'
     if (err.code === 'no_discogs_token') return 'no_discogs_token'
+    if (err.code === 'discogs_auth') return 'discogs_auth'
     if (err.code === 'discogs_rate_limited' || err.status === 429) return 'rate_limited'
   }
   return 'server'
@@ -179,11 +180,16 @@ export default function AddPage() {
       {state.phase === 'error' && (
         <div className="space-y-3 py-8 text-center">
           <p className="text-lg font-medium">
-            {state.kind === 'not_found' ? 'Nothing found' : 'Search failed'}
+            {state.kind === 'not_found'
+              ? 'Nothing found'
+              : state.kind === 'discogs_auth'
+                ? 'Discogs rejected your token'
+                : 'Search failed'}
           </p>
           <p className="text-sm text-neutral-400">
             {state.kind === 'not_found' && 'Try different spelling, or add the year.'}
             {state.kind === 'no_discogs_token' && 'Add your Discogs token in Settings first.'}
+            {state.kind === 'discogs_auth' && 'Check your Discogs token in Settings.'}
             {state.kind === 'rate_limited' && 'Discogs is rate limiting us. Try again shortly.'}
           </p>
           <button