feat(messages): sync saved message tags

internal/domain/channel.go

@@ -802,8 +802,11 @@ type ChannelMessagePeerReaction struct {
 // ChannelMessageReactions is the read model carried by channel messages and reaction updates.
 type ChannelMessageReactions struct {
 	CanSeeList bool
-	Results    []ChannelMessageReactionCount
-	Recent     []ChannelMessagePeerReaction
+	// AsTags marks reactions on Saved Messages as private message tags.
+	// It is never set for ordinary private/channel reactions.
+	AsTags  bool
+	Results []ChannelMessageReactionCount
+	Recent  []ChannelMessagePeerReaction
 	// Paid 是付费 reaction（Stars）聚合（nil = 无）；读路径从 channel_message_paid_reactions
 	// 填充、tg 转换注入 ReactionPaid 计数 + top reactors。与普通 reaction 分表存储。
 	Paid *ChannelMessagePaidReactions
@@ -923,6 +926,14 @@ type SavedReactionTag struct {
 	Count    int
 }
 
+// SavedReactionTagsRequest lists account-level Saved Messages tags. SavedPeer
+// is zero for the global list and non-zero for one Saved Messages sub-dialog.
+type SavedReactionTagsRequest struct {
+	UserID    int64
+	SavedPeer Peer
+	Limit     int
+}
+
 // ChannelDiscussionRef links a broadcast post to its discussion megagroup root message.
 type ChannelDiscussionRef struct {
 	ChannelID int64

internal/domain/message.go

@@ -232,6 +232,8 @@ type MessageFilter struct {
 	Query      string
 	OffsetID   int
 	OffsetDate int
+	MinDate    int
+	MaxDate    int
 	AddOffset  int
 	Limit      int
 	MaxID      int
@@ -245,6 +247,9 @@ type MessageFilter struct {
 	// SavedPeer 非零时仅返回 self-chat 中该 saved 子会话的消息
 	// （messages.getSavedHistory）；Peer 必须同时是 self。
 	SavedPeer Peer
+	// SavedReactions 非空时仅返回至少带其中一个 tag 的 Saved Messages。
+	// 仅 messages.search(peer=self) 使用；普通私聊 reaction 不参与匹配。
+	SavedReactions []MessageReaction
 	// PeerIDs restricts a global private search to these user peers. Empty is a
 	// valid restricted set, so RestrictPeerIDs carries presence separately.
 	PeerIDs         []int64

internal/domain/update_event.go

@@ -18,11 +18,10 @@ const (
 	// UpdateEventWebPage 映射 updateWebPage：异步解析完成后把消息里的 pending 链接预览
 	// 占位就地替换为已解析卡片。携带账号 pts（非 LacksWirePts），消息快照经 box JOIN 重建，
 	// 故 difference/dispatch 与 edit_message 同走通用消息事件路径，仅 tg 投影构造器不同。
-	UpdateEventWebPage          UpdateEventType = "web_page"
-	UpdateEventMessageReactions UpdateEventType = "message_reactions"
+	UpdateEventWebPage UpdateEventType = "web_page"
 	// UpdateEventMessagePoll 映射 updateMessagePoll（投票/关闭后 poll 状态变化；
 	// Message 为该 owner 视角消息，media 在 difference 重放时按 viewer 重新 enrich）。
-	// 与 reaction 同款：占账号 pts 但 TL 构造器无 pts，见 LacksWirePts。
+	// 当前历史实现仍将 poll 作为待复核的 LacksWirePts 事件。
 	UpdateEventMessagePoll      UpdateEventType = "message_poll"
 	UpdateEventContactsReset    UpdateEventType = "contacts_reset"
 	UpdateEventDialogPinned     UpdateEventType = "dialog_pinned"
@@ -126,8 +125,7 @@ type UpdateEvent struct {
 // 下一条真正带 pts 的更新会被判为空洞。
 func (e UpdateEvent) LacksWirePts() bool {
 	switch e.Type {
-	case UpdateEventMessageReactions,
-		UpdateEventMessagePoll,
+	case UpdateEventMessagePoll,
 		UpdateEventDraftMessage,
 		UpdateEventChannelState,
 		UpdateEventContactsReset,