feat(p10): archivage automatique des sessions terminées (rétention configurable)

- DB: migration #10 (sessions.archived_at + index), helpers archive/unarchive/archiveExpired (soft-archive, jamais de DELETE)
- core/retention-settings.ts: session_retention_days (défaut 30, 0=jamais, 1-3650) + session_purge_days (off)
- core/session-archive.ts: scheduler start/stop/sweep (calqué DiscoveryService), câblé dans runDaemon
- pty-manager.list({includeArchived}) + SessionSummary.archived + emitHistoricalUpdate
- routes: GET /sessions?includeArchived, POST/DELETE /sessions/:id/archive, POST /sessions/archive-now
- protocole additif: message WS session_archived (relayé par la gateway, abonnés 'sessions')
- settings: retentionDays/purgeDays exposés et validés dans PATCH /settings
- web: store sessions (showArchived + archive/unarchive), SessionsListView (toggle/badge/actions), SettingsView (slider rétention), i18n EN+FR
- tests: retention-settings + session-archive (vitest) + settings-routes étendu ; acceptance-p10.mjs (sweep, event WS, resume d'une session archivée → 201, rétention=0)

packages/server/src/app.ts

@@ -10,6 +10,7 @@ import type { Db } from './db/index.js';
 import { AuthService, LoginRateLimiter, type AuthContext } from './auth/service.js';
 import { PtyManager } from './core/pty-manager.js';
 import { DiscoveryService } from './core/discovery-service.js';
+import { SessionArchiveService } from './core/session-archive.js';
 import { WorktreeManager } from './core/worktree-manager.js';
 import { RepoDiscoveryService } from './core/repo-discovery.js';
 import { GroupManager } from './core/group-manager.js';
@@ -73,6 +74,7 @@ export interface AppBundle {
   auth: AuthService;
   manager: PtyManager;
   discovery: DiscoveryService;
+  sessionArchive: SessionArchiveService;
   repoDiscovery: RepoDiscoveryService;
   worktrees: WorktreeManager;
   groups: GroupManager;
@@ -94,6 +96,8 @@ export function buildApp(config: Config, db: Db, serverVersion: string): AppBund
     projectsDir: config.claudeProjectsDir,
     sessionsDir: config.claudeSessionsDir,
   });
+  // Archivage auto des sessions terminées (P10). Démarré dans runDaemon() — jamais ici (tests).
+  const sessionArchive = new SessionArchiveService({ db });
   // Watcher FS temps réel (P7) : armé à la demande sur les worktrees regardés via les commandes
   // WS watch/unwatch. closeAll() au drain (libération des descripteurs).
   const fsWatcher = new FsWatcherService();
@@ -177,7 +181,7 @@ export function buildApp(config: Config, db: Db, serverVersion: string): AppBund
   });
 
   registerAuthRoutes(app, auth, limiter, serverVersion, db);
-  registerSessionRoutes(app, manager, discovery, db);
+  registerSessionRoutes(app, manager, discovery, sessionArchive, db);
   registerProjectRoutes(app, manager, db);
   registerRepoRoutes(app, worktrees, db);
   registerGroupRoutes(app, groups, db, worktrees, manager);
@@ -192,7 +196,7 @@ export function buildApp(config: Config, db: Db, serverVersion: string): AppBund
   // La route websocket doit être déclarée APRÈS le chargement du plugin (contexte
   // encapsulé) — sinon le handler reçoit la signature REST (request, reply).
   void app.register(async (scoped) => {
-    registerWsGateway(scoped, manager, discovery, worktrees, groups, serverVersion);
+    registerWsGateway(scoped, manager, discovery, sessionArchive, worktrees, groups, serverVersion);
   });
 
   // SPA buildée embarquée dans le paquet npm (public/) — absente en dev (vite dev sert le front)
@@ -207,5 +211,5 @@ export function buildApp(config: Config, db: Db, serverVersion: string): AppBund
     });
   }
 
-  return { app, auth, manager, discovery, repoDiscovery, worktrees, groups, push, fsWatcher };
+  return { app, auth, manager, discovery, sessionArchive, repoDiscovery, worktrees, groups, push, fsWatcher };
 }