diff --git a/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt b/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
index 66a4d42..0b7712e 100644
--- a/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
+++ b/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
@@ -218,7 +218,10 @@ fun KaizenSidebar(
             // ── Conversation list ──
             val filteredConversations = remember(conversations, searchQuery) {
                 if (searchQuery.isBlank()) conversations
-                else conversations.filter { it.title.contains(searchQuery, ignoreCase = true) }
+                else conversations.filter {
+                    if (it.locked) false
+                    else it.title.contains(searchQuery, ignoreCase = true)
+                }
             }
 
             Box(Modifier.weight(1f).fillMaxWidth()) {
@@ -512,11 +515,13 @@ private fun HistoryItemRow(
             if (!item.locked) {
                 MenuRow(KaizenIcons.Pencil, stringResource(R.string.sidebar_rename), cs.onBackground) { showMenu = false; onRename() }
             }
-            if (!item.titleGenerated) {
+            if (!item.titleGenerated && !item.locked) {
                 MenuRow(KaizenIcons.Sparkles, stringResource(R.string.sidebar_generate_title), cs.onBackground) { showMenu = false; onGenerateTitle() }
             }
             MenuRow(KaizenIcons.Pin, stringResource(if (item.pinned) R.string.sidebar_unpin else R.string.sidebar_pin), cs.onBackground) { showMenu = false; onTogglePin() }
-            MenuRow(KaizenIcons.Copy, stringResource(R.string.sidebar_duplicate), cs.onBackground) { showMenu = false; onDuplicate() }
+            if (!item.locked) {
+                MenuRow(KaizenIcons.Copy, stringResource(R.string.sidebar_duplicate), cs.onBackground) { showMenu = false; onDuplicate() }
+            }
             MenuRow(
                 if (item.locked) KaizenIcons.LockOpen else KaizenIcons.Lock,
                 stringResource(if (item.locked) R.string.sidebar_unlock else R.string.sidebar_lock),