feat(web): cache dashboard aggregations with version invalidation

reaction_board/services/favorites.py

@@ -176,6 +176,7 @@ class FavoriteActionService:
                 aid=aid, folder_id=folder.media_id, position=position,
                 already=already,
             )
+            self.repo.bump_cache_version("videos")
             return ActionResult(
                 ok=True, aid=aid, action="favorite", state="done",
                 position=position, already_in_folder=already,
@@ -201,6 +202,7 @@ class FavoriteActionService:
                 message="候选不存在或已处理",
             )
         self.repo.mark_candidate_decision(aid, "rejected", now=self._now())
+        self.repo.bump_cache_version("videos")
         return ActionResult(
             ok=True, aid=aid, action="ignore", state="rejected",
             message="已忽略",
@@ -228,6 +230,7 @@ class FavoriteActionService:
         )
         rejected = self.repo.reject_pending_for_up(up_mid, now=self._now())
         self.repo.mark_candidate_decision(aid, "rejected", now=self._now())
+        self.repo.bump_cache_version("videos")
         return ActionResult(
             ok=True, aid=aid, action="blacklist", state="rejected",
             message=f"已拉黑 UP，并忽略该 UP 的 {rejected} 条待决策候选",