fix(desktop): retire model overlays by session revision

apps/desktop/src/main/__tests__/desktop-session-projection.test.ts

@@ -54,6 +54,8 @@ test('keeps equal raw Session ids distinct across Runtime Hosts', () => {
   );
 
   assert.notEqual(local.id, remote.id);
+  assert.equal(local.revision, 7);
+  assert.equal(remote.revision, 7);
   assert.equal(local.profileKind, 'local');
   assert.equal(remote.profileName, 'Office');
 });
@@ -268,9 +270,10 @@ test('projects durable WorkHub delegation targets into the Desktop host namespac
   }
 });
 
-function summary(id: string): SessionSummary {
+function summary(id: string): SessionSummary & { revision: number } {
   return {
     id,
+    revision: 7,
     name: id,
     isFlagged: false,
     isArchived: false,

apps/desktop/src/main/__tests__/external-session-catalog-projection.test.ts

@@ -54,9 +54,10 @@ test('projects imported Session ids into the same Desktop identity space as Sess
   assert.equal(catalogItem.importState.importedSessionIds[0], summary.id);
 });
 
-function session(id: string): SessionSummary {
+function session(id: string): SessionSummary & { revision: number } {
   return {
     id,
+    revision: 1,
     name: 'Imported',
     isFlagged: false,
     isArchived: false,

apps/desktop/src/main/__tests__/runtime-host-session-catalog-ipc-main.test.ts

@@ -23,6 +23,7 @@ import type { IpcMain } from 'electron';
 import type { SessionCatalogProjection, SessionCreateInput } from '@maka/runtime-host/protocol';
 import {
   registerRuntimeHostSessionCatalogIpc,
+  toDesktopHostSharedSessionSummary,
   toDesktopHostSessionSummary,
   type RuntimeHostSessionCatalogIpcDeps,
 } from '../runtime-host-session-catalog-ipc-main.js';
@@ -41,6 +42,11 @@ test('maps Runtime Host live run state without collapsing unknown and known-empt
   assert.deepEqual(running.runningTurnIds, ['turn-live']);
 });
 
+test('preserves the Session revision in Owner and Shared Desktop Host summaries', () => {
+  assert.equal(toDesktopHostSessionSummary(projection({ revision: 7 })).revision, 7);
+  assert.equal(toDesktopHostSharedSessionSummary(sharedProjection()).revision, 7);
+});
+
 test('session creation forwards the caller name for a mode that carries none', async () => {
   const creates: SessionCreateInput[] = [];
   const ipc = ipcHarness();
@@ -121,3 +127,15 @@ function projection(overrides: Partial<SessionCatalogProjection> = {}): SessionC
     ...overrides,
   };
 }
+
+function sharedProjection() {
+  return {
+    kind: 'shared_session' as const,
+    id: 'session-1',
+    revision: 7,
+    createdAt: 1,
+    activityAt: 2,
+    name: 'Session',
+    status: 'active' as const,
+  };
+}