Let a non-blocking checklist item be dismissed with a recorded decision, and run discovery on the mirror once there is something to discover

Plugin/unraid/api/checklist.php

@@ -232,6 +232,42 @@ if (!empty($host2)) {
     ];
 }
 
-$allOk = !in_array(false, array_column($items, 'ok'), true);
+// ── Blocking vs deferrable ────────────────────────────────────────────────────
+// Setup used to be complete only when every item was green, which made a media-server API key a
+// gate on finishing onboarding. A mirror that runs no Emby, or runs one the operator has not got
+// round to configuring, could never reach "complete" — and the checklist is what tells them
+// whether they are done.
+//
+// Blocking items are the ones the mesh genuinely cannot work without: who this host is, its conf,
+// its SSH key, the owner's master.conf, and the partnership itself. Everything else improves the
+// install without being load-bearing, and can be dismissed with a recorded decision.
+//
+// Deferring is per item and reversible, stored in the setup state so it survives a reload. The
+// item still shows — amber, "deferred" — rather than disappearing, because a dismissed item is a
+// decision to revisit, not a thing that stopped being true.
+$deferrable = ['api_key' => true, 'populated' => true, 'emby_key' => true, 'jellyfin_key' => true];
+$state      = vv_setup_state_read();
+
+foreach ($items as &$item) {
+    $canDefer        = !empty($deferrable[$item['id']]);
+    $item['blocking'] = !$canDefer;
+    $item['deferred'] = $canDefer && !$item['ok']
+                        && !empty($state['DEFER_' . strtoupper($item['id'])]);
+    if ($item['deferred']) {
+        $item['detail'] = ($item['detail'] ?? '') . ' — deferred';
+        $item['action'] = 'undefer';
+    } elseif ($canDefer && !$item['ok']) {
+        // Keep the item's real action as the primary; the UI offers defer alongside it.
+        $item['can_defer'] = true;
+    }
+}
+unset($item);
+
+// Complete when every blocking item is green and every deferrable one is green or dismissed.
+$allOk = true;
+foreach ($items as $i) {
+    if ($i['ok']) continue;
+    if ($i['blocking'] || empty($i['deferred'])) { $allOk = false; break; }
+}
 
 echo json_encode(['ok' => true, 'complete' => $allOk, 'host_id' => $hostId, 'items' => $items]);