refactor(dashboard): use generic release URL helpers and avoid latest suffix duplication

Author: zouyonghe

dashboard/README.md

@@ -7,3 +7,4 @@
 - `VITE_ASTRBOT_RELEASE_BASE_URL`（可选）
   - 默认值：`https://github.com/AstrBotDevs/AstrBot/releases`
   - 用途：管理面板内“更新到最新版本”外部跳转所使用的 release 基地址。集成方可按需覆盖（例如 Desktop 指向其自身发布页）。
+  - 建议传入仓库的 `.../releases` 基地址（不带 `/latest`）。

dashboard/src/layouts/full/vertical-header/VerticalHeader.vue

@@ -58,10 +58,17 @@ const resolveReleaseBaseUrl = () => {
   const raw = import.meta.env.VITE_ASTRBOT_RELEASE_BASE_URL;
   // Keep upstream default on AstrBot releases; desktop distributors can override via env injection.
   const normalized = raw?.trim()?.replace(/\/+$/, '') || '';
-  return normalized || DEFAULT_ASTRBOT_RELEASE_BASE_URL;
+  const withoutLatestSuffix = normalized.replace(/\/latest$/i, '');
+  return withoutLatestSuffix || DEFAULT_ASTRBOT_RELEASE_BASE_URL;
+};
+const releaseBaseUrl = resolveReleaseBaseUrl();
+const getReleaseUrlByTag = (tag: string | null | undefined) => {
+  const normalizedTag = (tag || '').trim();
+  if (!normalizedTag || normalizedTag.toLowerCase() === 'latest') {
+    return `${releaseBaseUrl}/latest`;
+  }
+  return `${releaseBaseUrl}/tag/${normalizedTag}`;
 };
-const desktopReleaseBaseUrl = resolveReleaseBaseUrl();
-const fallbackReleaseUrl = `${desktopReleaseBaseUrl}/latest`;
 
 const getSelectedGitHubProxy = () => {
   if (typeof window === "undefined" || !window.localStorage) return "";
@@ -144,14 +151,11 @@ function confirmExternalRedirect() {
 const getReleaseUrlForDesktop = () => {
   const firstRelease = (releases.value as any[])?.[0];
   if (firstRelease?.tag_name) {
-    const tag = firstRelease.tag_name as string;
-    return `${desktopReleaseBaseUrl}/tag/${tag}`;
+    return getReleaseUrlByTag(firstRelease.tag_name as string);
   }
-  if (hasNewVersion.value) return fallbackReleaseUrl;
+  if (hasNewVersion.value) return getReleaseUrlByTag('latest');
   const tag = botCurrVersion.value?.startsWith('v') ? botCurrVersion.value : 'latest';
-  return tag === 'latest'
-    ? fallbackReleaseUrl
-    : `${desktopReleaseBaseUrl}/tag/${tag}`;
+  return getReleaseUrlByTag(tag);
 };
 
 function handleUpdateClick() {
@@ -160,7 +164,7 @@ function handleUpdateClick() {
     resolvingReleaseTarget.value = true;
     checkUpdate();
     void getReleases().finally(() => {
-      pendingRedirectUrl.value = getReleaseUrlForDesktop() || fallbackReleaseUrl;
+      pendingRedirectUrl.value = getReleaseUrlForDesktop() || getReleaseUrlByTag('latest');
       resolvingReleaseTarget.value = false;
     });
     return;