test(plugins): make global switch recovery deterministic (#8342)

* test(plugins): trace recurring global recovery failure

* test(plugins): control cleanup in global switch recovery

---------

Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com>

packages/server/src/server/plugins/index.posix.test.ts

@@ -1071,9 +1071,38 @@ export default function contribute(plugin: unknown) {
       "second",
       `export default function contribute(plugin: unknown) { void plugin; return () => undefined; }`,
     );
+    // Hold cleanup open so synchronous detach and queued recovery are tested
+    // independently of compiler/process startup speed on the runner.
+    let finishCleanup = () => undefined;
+    const cleanup = new Promise<void>((resolve) => {
+      finishCleanup = resolve;
+    });
+    const running = new Set<string>();
+    const runtime: TestPluginRuntime = {
+      ...emptyUsageRuntime,
+      catalog: () => [...running].map((id) => ({ id, clientBundle: "bundle" })),
+      invoke: async (pluginId) => {
+        if (!running.has(pluginId)) throw new Error(`Plugin is not available: ${pluginId}`);
+        return pluginId;
+      },
+      getLogs: () => [],
+      clearLogs: () => undefined,
+      startPlugin: async (pluginId, _path, canPublish) => {
+        if (!canPublish()) throw new Error(`Plugin start cancelled: ${pluginId}`);
+        running.add(pluginId);
+      },
+      stopPluginById: async (pluginId) => {
+        const existed = running.delete(pluginId);
+        await cleanup;
+        return existed;
+      },
+      stopAll: async () => running.clear(),
+      subscribe: () => () => undefined,
+      bindPaseoSessionHost: () => undefined,
+    };
     const store = createStore(home);
     const service = bindTestSessionHost(
-      new PluginService(pino({ level: "silent" }), store, "0.4.0"),
+      new PluginService(pino({ level: "silent" }), store, "0.4.0", { runtime }),
     );
     try {
       await service.start();
@@ -1087,6 +1116,8 @@ export default function contribute(plugin: unknown) {
         "Plugin is not available",
       );
       await store.patch({ pluginsEnabled: true });
+      expect(service.catalog()).toEqual([]);
+      finishCleanup();
       // Observe recovery itself. Reloading here restarts a healthy plugin and
       // would also conceal a failure to restart it after the global enable.
       await expect
@@ -1096,6 +1127,7 @@ export default function contribute(plugin: unknown) {
           { id: "second", status: "running" },
         ]);
     } finally {
+      finishCleanup();
       await service.stopAllPlugins();
     }
   }, 20_000);