fix: refresh watch scope on provider fallback

src/main/services/infrastructure/teamWatchScope.ts

@@ -76,7 +76,7 @@ export function markTeamEngaged(teamName: string, nowMs: number = Date.now()): v
     return;
   }
   const currentScope = computeTeamWatchScope(nowMs);
-  const wasInScope = currentScope === null || currentScope.has(teamName);
+  const wasInScope = currentScope?.has(teamName) === true;
   engagedAtByTeam.set(teamName, nowMs);
   if (!wasInScope) {
     scopeChangeListener?.();

test/main/services/infrastructure/teamWatchScope.test.ts

@@ -69,6 +69,18 @@ describe('teamWatchScope', () => {
     expect(computeTeamWatchScope(0)).toBeNull();
   });
 
+  it('notifies on engagement when alive provider fails so watcher can refresh to fallback', () => {
+    const listener = vi.fn();
+    setAliveTeamsProvider(() => {
+      throw new Error('boom');
+    });
+    setTeamWatchScopeChangeListener(listener);
+
+    markTeamEngaged('x', 0);
+
+    expect(listener).toHaveBeenCalledTimes(1);
+  });
+
   it('ignores empty team names', () => {
     const listener = vi.fn();
     setTeamWatchScopeChangeListener(listener);