feat(desktop&tenant): Enhance desktop account and task consumer presence management

- Added new fields to DesktopAccountInfo for tracking account session and task consumer online status, along with queued publish task count and oldest queued publish task timestamp.
- Updated DesktopDispatchEvent to include server time for better synchronization.
- Implemented separate presence management for task consumers, including marking presence and loading presence state.
- Enhanced DesktopAccountService to apply publish queue summaries and manage task consumer presence.
- Introduced new methods for replaying queued publish tasks in DesktopDispatchHandler.
- Updated tests to cover new presence management logic and ensure correct behavior of account session and task consumer online status.

server/internal/shared/stream/desktop_dispatch.go

@@ -20,27 +20,28 @@ import (
 // the existing SSE handler on the desktop client can treat both channels the
 // same way and dedupe by task_id.
 type DesktopDispatchEvent struct {
-	Type                string    `json:"type"`
-	TaskID              string    `json:"task_id"`
-	JobID               string    `json:"job_id,omitempty"`
-	WorkspaceID         int64     `json:"workspace_id"`
-	TargetAccountID     string    `json:"target_account_id,omitempty"`
-	TargetClientID      string    `json:"target_client_id"`
-	Platform            string    `json:"platform,omitempty"`
-	Title               *string   `json:"title,omitempty"`
-	BusinessDate        *string   `json:"business_date,omitempty"`
-	SchedulerGroupKey   *string   `json:"scheduler_group_key,omitempty"`
-	QuestionText        *string   `json:"question_text,omitempty"`
-	Status              string    `json:"status"`
-	Kind                string    `json:"kind"`
-	Priority            int       `json:"priority,omitempty"`
-	Lane                string    `json:"lane,omitempty"`
-	InterruptGeneration int       `json:"interrupt_generation,omitempty"`
-	SignalOnly          bool      `json:"signal_only,omitempty"`
-	Control             string    `json:"control,omitempty"`
-	Reason              string    `json:"reason,omitempty"`
-	ReplacementTaskID   string    `json:"replacement_task_id,omitempty"`
-	UpdatedAt           time.Time `json:"updated_at"`
+	Type                string     `json:"type"`
+	TaskID              string     `json:"task_id"`
+	JobID               string     `json:"job_id,omitempty"`
+	WorkspaceID         int64      `json:"workspace_id"`
+	TargetAccountID     string     `json:"target_account_id,omitempty"`
+	TargetClientID      string     `json:"target_client_id"`
+	Platform            string     `json:"platform,omitempty"`
+	Title               *string    `json:"title,omitempty"`
+	BusinessDate        *string    `json:"business_date,omitempty"`
+	SchedulerGroupKey   *string    `json:"scheduler_group_key,omitempty"`
+	QuestionText        *string    `json:"question_text,omitempty"`
+	Status              string     `json:"status"`
+	Kind                string     `json:"kind"`
+	Priority            int        `json:"priority,omitempty"`
+	Lane                string     `json:"lane,omitempty"`
+	InterruptGeneration int        `json:"interrupt_generation,omitempty"`
+	SignalOnly          bool       `json:"signal_only,omitempty"`
+	Control             string     `json:"control,omitempty"`
+	Reason              string     `json:"reason,omitempty"`
+	ReplacementTaskID   string     `json:"replacement_task_id,omitempty"`
+	UpdatedAt           time.Time  `json:"updated_at"`
+	ServerTime          *time.Time `json:"server_time,omitempty"`
 }
 
 // DispatchSubscriber represents a live WebSocket connection bound to a single