fix(test): clears lingering Kobalte timers after each test

Author: wgordon17

tests/setup.ts

@@ -1,3 +1,5 @@
+import { afterEach } from "vitest";
+
 // Global test setup: ensure localStorage is available before module imports.
 // auth.ts reads localStorage at module scope (to initialize the token signal from
 // persisted value). happy-dom establishes window globals lazily, so this shim
@@ -15,3 +17,29 @@ if (typeof localStorage === "undefined") {
     configurable: true,
   });
 }
+
+// Track all timer IDs created during tests so we can clear them on teardown.
+// Kobalte's tooltip/popover primitives set module-level timers via
+// window.setTimeout that can fire after happy-dom tears down, causing
+// "ReferenceError: window is not defined".
+const pendingTimers = new Set<ReturnType<typeof setTimeout>>();
+const originalSetTimeout = globalThis.setTimeout;
+const originalClearTimeout = globalThis.clearTimeout;
+
+globalThis.setTimeout = ((...args: Parameters<typeof setTimeout>) => {
+  const id = originalSetTimeout(...args);
+  pendingTimers.add(id);
+  return id;
+}) as typeof setTimeout;
+
+globalThis.clearTimeout = ((id?: ReturnType<typeof setTimeout>) => {
+  if (id !== undefined) pendingTimers.delete(id);
+  originalClearTimeout(id);
+}) as typeof clearTimeout;
+
+afterEach(() => {
+  for (const id of pendingTimers) {
+    originalClearTimeout(id);
+  }
+  pendingTimers.clear();
+});