fix: support concurrent game windows and prepare beta12 GitHub releases

apps/app-frontend/src/helpers/instance-launch-state.ts

@@ -0,0 +1,20 @@
+import { reactive } from 'vue'
+
+const pending = reactive(new Map<string, Promise<unknown>>())
+
+export function isInstanceLaunching(instanceId: string) {
+	return pending.has(instanceId)
+}
+
+/** Coalesce repeated clicks for one launch without blocking other instances. */
+export function launchOnce<T>(instanceId: string, launch: () => Promise<T>): Promise<T> {
+	const existing = pending.get(instanceId)
+	if (existing) return existing as Promise<T>
+	const task = Promise.resolve()
+		.then(launch)
+		.finally(() => {
+			pending.delete(instanceId)
+		})
+	pending.set(instanceId, task)
+	return task
+}