fix(lnd): retry channel opens during LND startup + calm non-red notice

LND's RPC answers before its p2p server finishes loading, so connect/open
during that window failed red with the raw "server is still in the
process of starting". Now: quiet ~30s retry first; if still starting, a
calm amber "still finishing its startup" notice instead of an error.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/components/LightningChannelsPanel.vue

@@ -245,8 +245,18 @@
           </div>
         </div>
 
-        <div v-if="openError" class="mt-3 alert-error">
-          <p class="text-xs">{{ openError }}</p>
+        <!-- "Still starting" is a wait-a-moment notice, not a failure — show
+             it as calm amber info instead of the red error treatment. -->
+        <div
+          v-if="openError"
+          class="mt-3"
+          :class="isStartupNotice(openError)
+            ? 'p-3 rounded-lg border border-amber-400/25 bg-amber-500/10 text-amber-200/90'
+            : 'alert-error'"
+        >
+          <p class="text-xs">
+            <span v-if="isStartupNotice(openError)" class="mr-1">⏳</span>{{ openError }}
+          </p>
         </div>
 
         <div class="flex gap-3 mt-6">
@@ -356,6 +366,14 @@ const openForm = ref(defaultOpenForm())
 const openingChannel = ref(false)
 const openError = ref<string | null>(null)
 
+/** LND's transient post-unlock state ("still finishing its startup") is a
+ *  wait-a-moment notice, not a failure — the template styles it amber. */
+function isStartupNotice(msg: string | null): boolean {
+  if (!msg) return false
+  const m = msg.toLowerCase()
+  return m.includes('still finishing its startup') || m.includes('in the process of starting')
+}
+
 const closeTarget = ref<Channel | null>(null)
 const closingChannel = ref(false)
 const closeError = ref<string | null>(null)