feat(teams): granular progress notifications with direct/leader mode

- Replace progress_notifications toggle with granular config:
  dispatched (on), progress (on), failed (on) + delivery mode
- Direct mode: outbound to channel, no AI processing
- Leader mode: inject into leader session with NO-ACTION instructions
- Add consumer.team-notify subscriber for event forwarding
- Enrich TeamTaskEventPayload with TaskNumber, ProgressPercent/Step
- Add auto-status system prompt section
- UI: card-select for delivery mode (Zap/Bot icons), 3 toggles

pkg/protocol/team_events.go

@@ -107,6 +107,7 @@ type QualityGateRetryPayload struct {
 type TeamTaskEventPayload struct {
 	TeamID           string `json:"team_id"`
 	TaskID           string `json:"task_id"`
+	TaskNumber       int    `json:"task_number,omitempty"`
 	Subject          string `json:"subject,omitempty"`
 	Status           string `json:"status"`
 	OwnerAgentKey    string `json:"owner_agent_key,omitempty"`
@@ -117,6 +118,10 @@ type TeamTaskEventPayload struct {
 	ChatID           string `json:"chat_id"`
 	Timestamp        string `json:"timestamp"`
 
+	// Progress (for team.task.progress events).
+	ProgressPercent int    `json:"progress_percent,omitempty"`
+	ProgressStep    string `json:"progress_step,omitempty"`
+
 	// Actor info for audit trail (recorded to team_task_events by subscriber).
 	ActorType string `json:"actor_type,omitempty"` // "agent", "human", "system"
 	ActorID   string `json:"actor_id,omitempty"`   // agent key, user ID, or system identifier