fix: 优化电脑端弹窗尺寸并彻底修复系统更新排队调度卡死问题

server/app.ts

@@ -62,6 +62,7 @@ import {
   reconcileOrphanedUpdateJobs,
   readCachedRelease,
   writeUpdateRequest,
+  cancelUpdateJob,
   type UpdateRequest,
 } from "./update-service.js";
 
@@ -1182,6 +1183,17 @@ export async function buildApp(database: DatabaseContext, config: AppConfig) {
     return reply.code(202).send({ job: { id, status: "queued", operation: "download", version } });
   });
 
+  app.post("/api/update/cancel", { preHandler: guard(database, config) }, async (request, reply) => {
+    reconcileOrphanedUpdateJobs(database.sqlite, config);
+    const body = (request.body && typeof request.body === "object" ? request.body : {}) as { jobId?: string };
+    const result = cancelUpdateJob(database.sqlite, config, request.auth!.admin.id, request.id, body.jobId);
+    if (!result.cancelled) {
+      throw new AppError(409, "CANNOT_CANCEL", result.message || "无法取消当前更新任务");
+    }
+    reply.header("Cache-Control", "no-store");
+    return reply.send({ success: true, message: "已取消更新任务" });
+  });
+
   app.get("/api/update/jobs/:id", { preHandler: guard(database, config) }, async (request, reply) => {
     const id = z.string().uuid().parse((request.params as { id: string }).id);
     reconcileOrphanedUpdateJobs(database.sqlite, config);