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/types/chat.ts

@@ -9,7 +9,7 @@ export interface GenerationTiming {
 export interface ToolCallRecord {
   function: string;
   arguments: Record<string, unknown>;
-  result: { success: boolean; type?: string; data?: Record<string, unknown>; error?: string; suggested_tags?: string[] };
+  result: { success: boolean; type?: string; data?: Record<string, unknown>; error?: string; suggested_tags?: string[]; requires_confirmation?: boolean; similar_note?: { id: number; title: string } };
   status: "running" | "success" | "error" | "declined";
 }