fix: 临时回退内置自动更新以修复启动崩溃

1.0.0-beta14 启用内置更新后，Windows 上一打开即崩溃（c0000409 栈
溢出）。暂时将 are_updates_enabled 改回 false，待定位并修复崩溃后
再重新启用。

- main.rs: are_updates_enabled 恢复返回 false；
- catalog.ts: 增量新增 1.0.0-beta15 公告；
- 网站 catalog.json 重新生成。

apps/website/releases/catalog.json

@@ -1,6 +1,23 @@
 {
-  "updated_at": "2026-09-25T23:51:11.379Z",
+  "updated_at": "2026-09-26T01:53:59.007Z",
   "announcements": [
+    {
+      "id": "launcher-1.0.0-beta15",
+      "version": "1.0.0-beta15",
+      "publishedAt": "2026-09-26",
+      "title": {
+        "en-US": "Starlight Launcher 1.0.0-beta15",
+        "zh-CN": "Starlight Launcher 1.0.0-beta15"
+      },
+      "changes": {
+        "fixed": [
+          {
+            "en-US": "Fixed the launcher crashing on startup in 1.0.0-beta14 by temporarily reverting the built-in updater. The updater will be re-enabled after the crash is resolved.",
+            "zh-CN": "修复 1.0.0-beta14 中启动器一打开就崩溃的问题：暂时回退了内置自动更新。待崩溃问题解决后会重新启用。"
+          }
+        ]
+      }
+    },
     {
       "id": "launcher-1.0.0-beta14",
       "version": "1.0.0-beta14",