fix(download): 连续 3 轮查不到才判移除（M1）

qB 列表与按 hash 都查不到时先记 missing_since / missing_count，连续 MISSING_CONFIRM_ROUNDS(3) 轮才判 removed；中途重新出现或只是去掉管理标签即清零。相关测试改为同步多轮后再断言移除。

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

apps/server/src/modules/acquisition-organize/services/downloads.ts

@@ -718,6 +718,9 @@ export interface SyncStats {
   thresholdResumed: number;
 }
 
+/** 连续多少轮同步(列表 + 按 hash 查)都查不到才判 removed;与资产对账的 missingConfirmAfter 同口径 */
+export const MISSING_CONFIRM_ROUNDS = 3;
+
 export async function syncDownloads(d: AoDeps): Promise<SyncStats> {
   const stats: SyncStats = {
     instances: 0,
@@ -797,13 +800,20 @@ async function syncInstance(d: AoDeps, topo: InstanceTopology, stats: SyncStats)
         // 管理标签被移除:停止后续自动动作,保留历史与资产
         await trx
           .updateTable("download_task")
-          .set({ managed: false, tags: still.tags, last_synced_at: now })
+          .set({ managed: false, tags: still.tags, last_synced_at: now, missing_since: null, missing_count: 0 })
+          .where("id", "=", row.id)
+          .execute();
+      } else if (row.missing_count + 1 < MISSING_CONFIRM_ROUNDS) {
+        // 列表与按 hash 都查不到:先记缺席(qB 刚重启、任务还没加载完时会短暂返回空 / 部分列表)
+        await trx
+          .updateTable("download_task")
+          .set({ missing_since: row.missing_since ?? now, missing_count: row.missing_count + 1, last_synced_at: now })
           .where("id", "=", row.id)
           .execute();
       } else {
         await trx
           .updateTable("download_task")
-          .set({ status: "removed", removed_at: now, last_synced_at: now })
+          .set({ status: "removed", removed_at: now, last_synced_at: now, missing_count: row.missing_count + 1 })
           .where("id", "=", row.id)
           .execute();
         await emitStatus(d, trx, row.id, row.status, "removed", null);
@@ -892,6 +902,8 @@ async function observeLocked(
       last_progress_at: lastProgressAt,
       no_progress_since: noProgressSince,
       last_synced_at: now,
+      missing_since: null,
+      missing_count: 0,
       ...(becameComplete ? { completed_at: now } : {}),
     })
     .where("id", "=", row.id)