diff --git a/core/archipelago/src/api/rpc/content.rs b/core/archipelago/src/api/rpc/content.rs
index 32c97166..e0254702 100644
--- a/core/archipelago/src/api/rpc/content.rs
+++ b/core/archipelago/src/api/rpc/content.rs
@@ -35,15 +35,21 @@ impl RpcHandler {
             .get("filename")
             .and_then(|v| v.as_str())
             .ok_or_else(|| anyhow::anyhow!("Missing filename"))?;
-        // Validate filename: prevent path traversal, hidden files, and excessive length
-        if filename.contains("..") || filename.contains('\0') || filename.contains('/') || filename.contains('\\') {
+        // Validate filename: prevent path traversal and null bytes
+        // Allow forward slashes for subdirectories (e.g., "Music/song.mp3")
+        if filename.contains("..") || filename.contains('\0') || filename.contains('\\') {
             anyhow::bail!("Invalid filename: path traversal not allowed");
         }
-        if filename.starts_with('.') {
-            anyhow::bail!("Invalid filename: hidden files not allowed");
+        // Reject paths starting with / (absolute) or . (hidden)
+        if filename.starts_with('/') || filename.starts_with('.') {
+            anyhow::bail!("Invalid filename: absolute paths and hidden files not allowed");
         }
-        if filename.is_empty() || filename.len() > 255 {
-            anyhow::bail!("Invalid filename: must be 1-255 characters");
+        // Reject any path segment starting with . (hidden dirs)
+        if filename.split('/').any(|seg| seg.starts_with('.') || seg.is_empty()) {
+            anyhow::bail!("Invalid filename: hidden files/dirs or empty segments not allowed");
+        }
+        if filename.is_empty() || filename.len() > 512 {
+            anyhow::bail!("Invalid filename: must be 1-512 characters");
         }
         let mime_type = params
             .get("mime_type")
diff --git a/neode-ui/src/views/Federation.vue b/neode-ui/src/views/Federation.vue
index 8110c167..77322851 100644
--- a/neode-ui/src/views/Federation.vue
+++ b/neode-ui/src/views/Federation.vue
@@ -188,7 +188,7 @@
       <div class="space-y-2">
         <div v-for="r in syncResults" :key="r.did" class="flex items-center gap-3 p-3 bg-white/5 rounded-lg">
           <div class="w-2 h-2 rounded-full shrink-0" :class="r.status === 'ok' ? 'bg-green-400' : 'bg-red-400'"></div>
-          <span class="text-sm text-white/80 font-mono truncate">{{ shortDid(r.did) }}</span>
+          <span class="text-sm text-white/80 truncate" :title="r.did">{{ nodeNameFromDid(r.did) }}</span>
           <span v-if="r.status === 'ok'" class="text-xs text-green-400">{{ r.apps }} apps</span>
           <span v-else class="text-xs text-red-400 truncate">{{ r.error }}</span>
         </div>
@@ -230,7 +230,7 @@
           <div class="flex items-center justify-between mb-2">
             <div class="flex items-center gap-3 min-w-0">
               <div class="w-2.5 h-2.5 rounded-full shrink-0" :class="isOnline(node) ? 'bg-green-400' : 'bg-white/30'"></div>
-              <span class="text-sm font-medium text-white truncate" :title="node.did">{{ node.name || shortDid(node.did) }}</span>
+              <span class="text-sm font-medium text-white truncate" :title="node.did">{{ nodeName(node) }}</span>
               <span
                 class="text-xs shrink-0"
                 :class="nodeTransportIcon(node.did).color"
@@ -292,7 +292,7 @@
           <div class="flex items-center justify-between mb-2">
             <div class="flex items-center gap-3 min-w-0">
               <div class="w-2.5 h-2.5 rounded-full shrink-0" :class="isOnline(node) ? 'bg-green-400' : 'bg-white/30'"></div>
-              <span class="text-sm font-medium text-white truncate" :title="node.did">{{ node.name || shortDid(node.did) }}</span>
+              <span class="text-sm font-medium text-white truncate" :title="node.did">{{ nodeName(node) }}</span>
             </div>
             <span class="text-xs px-2 py-0.5 rounded-full shrink-0" :class="trustBadgeClass(node.trust_level)">{{ node.trust_level }}</span>
           </div>
@@ -578,7 +578,7 @@ const mapNodes = computed(() => {
   for (const node of nodes.value) {
     result.push({
       did: node.did,
-      label: node.name || shortDid(node.did),
+      label: nodeName(node),
       trust_level: node.trust_level as 'trusted' | 'observer' | 'untrusted',
       online: isOnline(node),
       app_count: node.last_state?.apps?.length ?? 0,
@@ -773,6 +773,21 @@ function shortDid(did: string): string {
   return did.slice(0, 16) + '...' + did.slice(-8)
 }
 
+/** User-friendly node display name. Prefers name, falls back to "Node-XXXX" from DID hash. */
+function nodeName(node: { name?: string | null; did: string }): string {
+  if (node.name) return node.name
+  const suffix = node.did.replace(/^did:key:z6Mk/, '').slice(-6).toUpperCase()
+  return `Node-${suffix}`
+}
+
+/** Look up display name from DID (for sync results that only have a DID). */
+function nodeNameFromDid(did: string): string {
+  const node = nodes.value.find(n => n.did === did)
+  if (node) return nodeName(node)
+  const suffix = did.replace(/^did:key:z6Mk/, '').slice(-6).toUpperCase()
+  return `Node-${suffix}`
+}
+
 function timeAgo(iso: string): string {
   const seconds = Math.floor((Date.now() - new Date(iso).getTime()) / 1000)
   if (seconds < 60) return 'just now'