feat(knowledge): note types, counts, new-note button, audit fixes

- Add note_type (note/person/place/list) selector + entity metadata fields
  (relationship, email, phone / address, hours) to NoteEditorView
- Pre-select type via ?type= query param from KnowledgeView new-note dropdown
- KnowledgeView: add split "New note / ▾" button with type dropdown
- KnowledgeView: show per-type counts on sidebar filter buttons (when > 1)
- Fix: filter-btn now flex layout so count badge aligns to right edge
- Fix: list_notes count_query was missing parent_id filter (inflated totals)
- Fix: PATCH /api/notes/:id now fires upsert_note_embedding (workspace autosave)
- Fix: get_knowledge_counts endpoint for per-type counts
- Fix: get_knowledge_tags was silently discarding note_type filter (double-stmt bug)
- Fix: NoteEditorView onMounted stray brace from edit session

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

frontend/src/types/note.ts

@@ -1,5 +1,6 @@
 export type TaskStatus = "todo" | "in_progress" | "done" | "cancelled";
 export type TaskPriority = "none" | "low" | "medium" | "high";
+export type NoteType = "note" | "person" | "place" | "list";
 
 export interface Note {
   id: number;
@@ -18,6 +19,8 @@ export interface Note {
   recurrence_rule: Record<string, unknown> | null;
   recurrence_next_spawn_at: string | null;
   is_task: boolean;
+  note_type: NoteType;
+  metadata: Record<string, string>;
   created_at: string;
   updated_at: string;
 }