fix(ci): fix test failures from recent feature additions

- Add ChatStore mock to all dashboard route tests that mock @fusion/core,
  since server.ts now instantiates ChatStore(store.getFusionDir(), ...)
- Add getFusionDir to createMockStore in server.test.ts
- Gate AI session cleanup scheduling behind shouldScheduleAiSessionCleanup()
  (returns false in test env) to prevent open handle warnings
- Fix desktop tests: DASHBOARD_URL is now exported as a function alias,
  update assertions to call DASHBOARD_URL() instead of using as string
- Add node:os mocks to system-metrics.test.ts for deterministic results
- Replace hardcoded maxWorkers=16 with availableParallelism()-based
  calculation in all vitest configs to prevent OOM on 2-core CI runners
- Add --workspace-concurrency=2 to pnpm test commands
- Fix TaskCard tests: update mission badge title assertions to full titles
- Remove unused /api/mesh/state route
- Fix plugin-auto-label: add isError field, async onTaskCreated, "tests" keyword
- Fix plugin-ci-status: add module-level logger, tighten test assertions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/examples/fusion-plugin-ci-status/src/__tests__/index.test.ts

@@ -153,8 +153,7 @@ describe("ci-status plugin", () => {
 
       await plugin.hooks.onUnload?.();
 
-      // Should log that plugin is shutting down (logged as part of onUnload)
-      expect(ctx.logger.info).toHaveBeenCalled();
+      expect(ctx.logger.info).toHaveBeenCalledWith("CI Status plugin unloaded");
     });
   });
 
@@ -297,9 +296,15 @@ describe("ci-status plugin", () => {
           (r) => r.method === "GET" && r.path === "/status/:branch",
         )!;
 
-        await expect(
-          route.handler(req as any, ctx as any),
-        ).rejects.toThrow("Branch not found");
+        expect(() => route.handler(req as any, ctx as any)).toThrow(
+          "Branch not found",
+        );
+
+        try {
+          route.handler(req as any, ctx as any);
+        } catch (error) {
+          expect((error as { statusCode?: number }).statusCode).toBe(404);
+        }
       });
     });