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/core/pty-manager.ts

@@ -23,6 +23,25 @@ const NOTIFY_DEBOUNCE_MS = 1500;
 const CLAUDE_ID_POLL_MS = 400;
 const CLAUDE_ID_TIMEOUT_MS = 60_000;
 
+/**
+ * Ligne `sessions` telle que lue pour construire un SessionSummary historique (session terminée).
+ * `type` (et non `interface`) pour que TS infère l'index signature implicite → cast direct depuis
+ * le `Record<string, SQLOutputValue>` de node:sqlite.
+ */
+type HistoricalRow = {
+  id: string;
+  cwd: string;
+  command: string;
+  title: string | null;
+  created_at: string;
+  ended_at: string | null;
+  exit_code: number | null;
+  claude_session_id: string | null;
+  added_dirs: string | null;
+  group_id: string | null;
+  archived_at: string | null;
+};
+
 /** Parse la colonne `added_dirs` (JSON array de chemins) de façon défensive ; [] si NULL/invalide. */
 function parseAddedDirs(raw: string | null): string[] {
   if (!raw) return [];
@@ -246,41 +265,61 @@ export class PtyManager extends EventEmitter<PtyManagerEvents> {
     return set;
   }
 
-  list(): SessionSummary[] {
+  list(opts?: { includeArchived?: boolean }): SessionSummary[] {
     const liveSummaries = [...this.live.values()].map((s) => this.summarize(s));
     const liveIds = new Set(this.live.keys());
     const rows = this.db
-      .prepare('SELECT id, cwd, command, title, created_at, ended_at, exit_code, claude_session_id, added_dirs, group_id FROM sessions ORDER BY created_at DESC LIMIT 100')
-      .all() as Array<{ id: string; cwd: string; command: string; title: string | null; created_at: string; ended_at: string | null; exit_code: number | null; claude_session_id: string | null; added_dirs: string | null; group_id: string | null }>;
+      .prepare('SELECT id, cwd, command, title, created_at, ended_at, exit_code, claude_session_id, added_dirs, group_id, archived_at FROM sessions ORDER BY created_at DESC LIMIT 100')
+      .all() as HistoricalRow[];
     const historical: SessionSummary[] = rows
       .filter((r) => !liveIds.has(r.id))
-      .map((r) => {
-        const addedDirs = parseAddedDirs(r.added_dirs);
-        return {
-          id: r.id,
-          cwd: r.cwd,
-          command: r.command,
-          title: r.title,
-          status: 'exited' as const,
-          live: false,
-          createdAt: r.created_at,
-          endedAt: r.ended_at,
-          exitCode: r.exit_code,
-          clients: 0,
-          source: 'managed' as const,
-          claudeSessionId: r.claude_session_id,
-          pid: null,
-          // une session claude morte avec un claudeSessionId connu est reprenable (--resume direct).
-          resumable: r.command === 'claude' && r.claude_session_id != null,
-          attachable: false,
-          registryStatus: null,
-          ...(addedDirs.length ? { addedDirs } : {}),
-          groupId: r.group_id,
-        };
-      });
+      // Sessions auto-archivées exclues par défaut (filtre indépendant et cumulable avec hidden).
+      .filter((r) => (opts?.includeArchived ? true : r.archived_at == null))
+      .map((r) => this.historicalSummary(r));
     return [...liveSummaries, ...historical];
   }
 
+  /** Construit le SessionSummary d'une ligne historique (session managée terminée). */
+  private historicalSummary(r: HistoricalRow): SessionSummary {
+    const addedDirs = parseAddedDirs(r.added_dirs);
+    return {
+      id: r.id,
+      cwd: r.cwd,
+      command: r.command,
+      title: r.title,
+      status: 'exited' as const,
+      live: false,
+      createdAt: r.created_at,
+      endedAt: r.ended_at,
+      exitCode: r.exit_code,
+      clients: 0,
+      source: 'managed' as const,
+      claudeSessionId: r.claude_session_id,
+      pid: null,
+      // une session claude morte avec un claudeSessionId connu est reprenable (--resume direct).
+      resumable: r.command === 'claude' && r.claude_session_id != null,
+      attachable: false,
+      registryStatus: null,
+      ...(addedDirs.length ? { addedDirs } : {}),
+      groupId: r.group_id,
+      archived: r.archived_at != null,
+    };
+  }
+
+  /**
+   * Ré-émet un `session_update` pour une session historique (P10) — utilisé au dés-archivage pour
+   * que tous les clients rafraîchissent le row (le champ `archived` repasse à false). No-op si la
+   * session est vivante (déjà couverte par le flux live) ou inconnue.
+   */
+  emitHistoricalUpdate(id: string): void {
+    if (this.live.has(id)) return;
+    const r = this.db
+      .prepare('SELECT id, cwd, command, title, created_at, ended_at, exit_code, claude_session_id, added_dirs, group_id, archived_at FROM sessions WHERE id = ?')
+      .get(id) as HistoricalRow | undefined;
+    if (!r) return;
+    this.emit('session_update', this.historicalSummary(r));
+  }
+
   get(id: string): SessionSummary | null {
     const s = this.live.get(id);
     return s ? this.summarize(s) : null;