bulk operations fixes

- Frontend: implémente bulkDelete, bulkArchive, bulkRestore
- Backend: adapts ticket DTOs pour bulk operations
- Infrastructure: MCP server pour gestion bulk tickets
- Tests: coverage frontend + backend

frontend/src/domain/index.ts

@@ -1538,6 +1538,19 @@ export interface TicketList {
   nextCursor?: string;
 }
 
+/** Per-ticket result for a bulk ticket mutation. */
+export interface TicketBulkResultItem {
+  ref: TicketRef;
+  ok: boolean;
+  ticket?: Ticket;
+  error?: GatewayError;
+}
+
+/** Result of a bulk ticket mutation; item order mirrors the requested refs. */
+export interface TicketBulkResult {
+  items: TicketBulkResultItem[];
+}
+
 /** The scoped-to-a-ticket Markdown carnet (mirror of `TicketCarnetDto`). */
 export interface TicketCarnet {
   ref: TicketRef;