UX: queue bubbles, dashboard queuing, duplicate confirm buttons, short-note fix

- Dashboard chat: allow typing/sending during streaming (queued in store)
  placeholder updates to "Type to queue…" during generation
- ChatView/WorkspaceView: replace queued chip with actual pending message
  bubbles — light grey, dashed border, "Queued" badge above content; clear
  button below the stack
- ToolCallCard: when tool returns requires_confirmation=True, show
  "Similar content found" label (not "Error"), link to the similar note,
  and "Create Anyway" / "Don't Create" buttons that auto-send the reply
- tools.py: fuzzy title match now returns requires_confirmation=True with
  similar_note data instead of a hard error, so numbered-series notes
  (Lore: X 0, Lore: X 1) can be created with one button click; semantic
  match responses also include similar_note for the link

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/stores/chat.ts

@@ -84,6 +84,11 @@ export const useChatStore = defineStore("chat", () => {
     return id ? (convQueues.value[id]?.length ?? 0) : 0;
   });
 
+  const queuedMessages = computed(() => {
+    const id = currentConversation.value?.id;
+    return id ? (convQueues.value[id] ?? []) : [];
+  });
+
   function clearQueue() {
     const id = currentConversation.value?.id;
     if (id) convQueues.value[id] = [];
@@ -556,6 +561,7 @@ export const useChatStore = defineStore("chat", () => {
     chatReady,
     isStreamingConv,
     queuedCount,
+    queuedMessages,
     clearQueue,
     fetchConversations,
     createConversation,