fix(growth): require a 1000-view baseline on the rate board

Keep small-base videos on the delta board only, and raise the smoothing prior to 1000 so videos that just clear the floor do not dominate the ranking.

reaction_board/web/static/views/rankings.js

@@ -187,8 +187,8 @@ function growthNote(sort, growthDays, prior) {
       ? `百分比是真实相对增量；排序按平滑增速（基线 + ${strength}）。`
       : "百分比是真实相对增量；排序按平滑增速。";
     const cold = Number(growthDays) === 1
-      ? "当日发布不进增速榜。更早发布的新入库按入库时播放量起算，需要当天至少两次采样。"
-      : "";
+      ? "基线播放不足 1000、以及当日发布，不进增速榜。"
+      : "基线播放不足 1000 不进增速榜。";
     return `<div class="section-note">${smooth}${cold}</div>`;
   }
   if (sort !== "growth" || Number(growthDays) !== 1) return "";