fix: 修复两端走查发现的4个UI断点

- 门户回填表单:缺发布截图时提交按钮前置禁用并提示「先上传发布截图，
  链接回填需以截图为凭证」，不再等提交后才 toast 报错(服务端守卫保留)
- 门户笔记详情:回填链接前收起回收区块的说明与示例图，只留一行锁定提示，
  降低回填阶段信息密度
- 运营端分发表:数据状态按任务采集计划显示等待日(等待D{首个采集日})，
  未设置计划时显示「待设置采集计划」，不再写死「等待D2」
- 截图包回收清单:序号列对无 source_row 的内容回退行号；种子内容补
  source_row，演示数据导出不再出现空序号

koc-portal/app/page.tsx

@@ -1666,9 +1666,15 @@ export default function Home() {
                 </label>
               </div>
             </div>
-            <button className="submit-primary" disabled={working}>
+            <button
+              className="submit-primary"
+              disabled={working || !(screenshot || selected.publish_screenshot_key)}
+            >
               {working ? "正在提交…" : selected.publish_url ? "更新这篇笔记" : "确认回填这篇笔记"}
             </button>
+            {!(screenshot || selected.publish_screenshot_key) && (
+              <p className="submitted-at">先上传发布截图，链接回填需以截图为凭证</p>
+            )}
             {selected.publish_time && (
               <p className="submitted-at">上次回填：{formatDate(selected.publish_time, true)}</p>
             )}
@@ -1796,13 +1802,16 @@ export default function Home() {
                     {selected.result_submitted_at ? "已提交" : "待提交"}
                   </span>
                 </div>
-                <p className="creator-recovery-tip">
-                  {payload.task.recoveryInstructions || "请提交发布后的笔记截图"}
-                  {payload.task.recoveryDueAt
-                    ? ` 截止：${formatDate(payload.task.recoveryDueAt)}。`
-                    : ""}
-                </p>
-                {(payload.task.recoveryExampleImages?.length ?? 0) > 0 && (
+                {selected.publish_url && (
+                  <p className="creator-recovery-tip">
+                    {payload.task.recoveryInstructions || "请提交发布后的笔记截图"}
+                    {payload.task.recoveryDueAt
+                      ? ` 截止：${formatDate(payload.task.recoveryDueAt)}。`
+                      : ""}
+                  </p>
+                )}
+                {selected.publish_url &&
+                  (payload.task.recoveryExampleImages?.length ?? 0) > 0 && (
                   <div className="task-result-gallery recovery-example">
                     {payload.task.recoveryExampleImages?.map((image) => (
                       <button