fix(knowledge): hide closed upload projection

.claude/skills/approval-module/SKILL.md

@@ -277,6 +277,7 @@ resolver/OpenFGA 故障必须传播，绝不能伪造成空审批人集合，也
   根目录仅展示 `source_parent_id IS NULL`，子目录仅展示等于当前目录 ID 的记录。列表内预览继续读取暂存对象，
   当前审批人可直接同意/拒绝，状态标签可进入完整详情及 Knowledge 业务重试/清理。`applied` 上传已经成为正式
   文件，Client 不再将其投影为虚拟待审行，也不在文件列表展示“已生效”标签；后续仅展示普通文件生命周期状态。
+  `closed` 表示上传未成功，Client 同样不投影虚拟文件行，也不在文件列表展示“已关闭”标签。
 - **执行**：审批决定交付只把 Knowledge request 置 `queued`；之后由 Knowledge generation token、request/step/footprint
   独立推进，业务失败不回写 F025。upload 的完成判据固定为正式文件图已提交、OpenFGA 权限写入成功且普通文件
   解析调度已接收；之后的解析、索引、向量化成功或失败只属于文件生命周期，不回写或回退审批状态。

src/frontend/client/src/pages/knowledge/SpaceDetail/FileChangeApproval.test.tsx

@@ -184,17 +184,16 @@ describe("F046 file change approval projection", () => {
         expect(apiSource).toContain("approvalStatus: raw.approval_status");
     });
 
-    it("stops projecting applied uploads after they become formal files", () => {
+    it("stops projecting applied and closed uploads", () => {
         const queued = pendingBusinessItem("queued", 1);
         const applying = pendingBusinessItem("applying", 2);
         const applied = pendingBusinessItem("applied", 3);
         const failed = pendingBusinessItem("failed", 4);
+        const closed = pendingBusinessItem("closed", 5);
 
-        expect(selectVisiblePendingUploads([queued, applying, applied, failed])).toEqual([
-            queued,
-            applying,
-            failed,
-        ]);
+        expect(selectVisiblePendingUploads([queued, applying, applied, failed, closed])).toEqual(
+            [queued, applying, failed],
+        );
     });
 
     it.each(BUSINESS_STATES)(

src/frontend/client/src/pages/knowledge/hooks/useFileChangeApproval.ts

@@ -70,11 +70,11 @@ export function selectApprovablePendingUploads(
     return items.filter(canDecidePendingUpload);
 }
 
-/** Applied uploads are formal files and must no longer be projected as pending rows. */
+/** Terminal uploads are not pending rows: applied files are formal, while closed uploads never succeeded. */
 export function selectVisiblePendingUploads(
     items: PendingUploadFileChange[],
 ): PendingUploadFileChange[] {
-    return items.filter((item) => item.status !== "applied");
+    return items.filter((item) => item.status !== "applied" && item.status !== "closed");
 }
 
 export function canDecidePendingUpload(item?: PendingUploadFileChange): boolean {