feat(tickets): persistance des filtres tickets entre redémarrages (#29)

Introduit le port UiPreferencesGateway et son adapter uiPreferences,
avec le module ticketFilterPersistence qui sauvegarde/restaure les
filtres (recherche, statut, sprint, agents) via useTickets,
useTicketSearch et useProjectAgents. Couvert par tests unitaires et
un test d'intégration.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/adapters/index.ts

@@ -30,6 +30,7 @@ import { TauriWorkStateGateway } from "./workState";
 import { TauriConversationGateway } from "./conversation";
 import { TauriTicketGateway } from "./ticket";
 import { TauriWindowGateway } from "./window";
+import { LocalStorageUiPreferencesGateway } from "./uiPreferences";
 
 function notImplemented(what: string): never {
   const err: GatewayError = {
@@ -67,6 +68,7 @@ export function createTauriGateways(): Gateways {
     conversation: new TauriConversationGateway(),
     ticket: new TauriTicketGateway(),
     window: new TauriWindowGateway(),
+    uiPreferences: new LocalStorageUiPreferencesGateway(),
   };
 }
 
@@ -89,4 +91,5 @@ export {
   TauriConversationGateway,
   TauriTicketGateway,
   TauriWindowGateway,
+  LocalStorageUiPreferencesGateway,
 };