fix: 修复应用还没有安装完，按钮就重新变成可安装状态 (#11)

fix：先用比较简单的方案解决安装之后卸载了还是显示已安装的问题

fix: 在安装成功的ipc信息之后再删除安装队列的任务

删除pnpm workspace

src/global/downloadStatus.ts

@@ -1,4 +1,78 @@
-import { ref } from "vue";
-import type { DownloadItem } from './typedefinition';
+import { computed,ComputedRef,ref,unref,watch } from "vue";
+import type { DownloadItem,DownloadItemStatus } from "./typedefinition";
 
 export const downloads = ref<DownloadItem[]>([]);
+
+export function removeDownloadItem(pkgname:string) {
+  const list = downloads.value;
+  for (let i = list.length - 1; i >= 0; i -= 1) {
+    if (list[i].pkgname === pkgname) {
+      list.splice(i,1);
+    }
+  }
+}
+
+export function watchDownloadsChange (cb: () => void) {
+  const statusById = new Map<number,DownloadItemStatus>();
+
+  for (const item of downloads.value) {
+    statusById.set(item.id,item.status);
+  }
+
+  watch(
+    downloads,
+    (list) => {
+      for (const item of list) {
+        const prevStatus = statusById.get(item.id);
+        if (item.status === "completed" && prevStatus !== "completed") {
+          cb();
+        }
+        statusById.set(item.id,item.status);
+      }
+
+      if (statusById.size > list.length) {
+        const liveIds = new Set<number>();
+        for (const item of list) liveIds.add(item.id);
+        for (const id of statusById.keys()) {
+          if (!liveIds.has(id)) statusById.delete(id);
+        }
+      }
+    },
+    { deep: true },
+  );
+}
+
+export function useDownloadItemStatus (
+  pkgname?: ComputedRef<string | undefined>,
+) {
+  const status: ComputedRef<DownloadItemStatus | undefined> = computed(() => {
+    const name = unref(pkgname);
+    if (!name) return;
+    const task = downloads.value.find((d) => d.pkgname === name);
+    if (!task) return;
+    return task.status;
+  });
+
+  const isCompleted = computed(() => {
+    return status.value === "completed";
+  });
+
+  return {
+    status,
+    isCompleted,
+  };
+}
+
+export function useInstallFeedback (pkgname?: ComputedRef<string | undefined>) {
+  const installFeedback = computed(() => {
+    const name = unref(pkgname);
+    if (!name) return false;
+    const task = downloads.value.find((d) => d.pkgname === name);
+    if (!task) return false;
+    return task.status !== "completed" && task.status !== "failed";
+  });
+
+  return {
+    installFeedback,
+  };
+}