feat: 启用内置自动更新

- are_updates_enabled 由硬编码 false 改为 true，正式启用内置更新器
  （更新端点与签名公钥由 tauri-release.conf.json 配置）。
- catalog.ts 新增 1.0.0-beta14 公告（增量追加，保留历史版本）。
- 网站 catalog.json 由 catalog.ts 重新生成。

apps/website/releases/catalog.json

@@ -1,10 +1,43 @@
 {
-  "updated_at": "2026-09-25T23:32:13.095Z",
+  "updated_at": "2026-09-25T23:51:11.379Z",
   "announcements": [
+    {
+      "id": "launcher-1.0.0-beta14",
+      "version": "1.0.0-beta14",
+      "publishedAt": "2026-09-26",
+      "title": {
+        "en-US": "Starlight Launcher 1.0.0-beta14",
+        "zh-CN": "Starlight Launcher 1.0.0-beta14"
+      },
+      "changes": {
+        "added": [
+          {
+            "en-US": "Enabled the built-in automatic updater, so the launcher can check for and install new versions from the update channel.",
+            "zh-CN": "启用内置自动更新，启动器现在可以从更新通道检查并安装新版本。"
+          }
+        ],
+        "fixed": [
+          {
+            "en-US": "Fixed the updater manifest download URL and release ordering so update checks succeed.",
+            "zh-CN": "修复更新清单的下载地址与发布顺序，更新检查现在可以成功。"
+          },
+          {
+            "en-US": "Updated the signing key pair used to sign update packages.",
+            "zh-CN": "更新了用于签名更新包的密钥对。"
+          }
+        ],
+        "changed": [
+          {
+            "en-US": "Removed upstream release announcements prior to 1.0.0-beta1.",
+            "zh-CN": "移除了 1.0.0-beta1 之前的上游版本公告。"
+          }
+        ]
+      }
+    },
     {
       "id": "launcher-1.0.0-beta13",
       "version": "1.0.0-beta13",
-      "publishedAt": "2026-09-26",
+      "publishedAt": "2026-09-25",
       "title": {
         "en-US": "Starlight Launcher 1.0.0-beta13",
         "zh-CN": "Starlight Launcher 1.0.0-beta13"