activity: global feed, per-case log, sidebar section, today UX

- migration 009: target_type, target_id, target_path columns
- new Event fields: TargetType, TargetID, TargetPath
- ListActivityFeed (paginated global), ListActivityByNode (per-case)
- all Record() callsites pass target info
- frontend: Активность sidebar section with chronological feed
- per-case Активность tab with real data (was placeholder)
- today events: clickable, target-type badges, event counts

internal/core/activity/activity.go

@@ -1,6 +1,7 @@
 package activity
 
 import (
+	"database/sql"
 	"time"
 
 	"verstak/internal/core/storage"
@@ -9,29 +10,44 @@ import (
 
 // Event types.
 const (
-	TypeNoteCreated  = "note_created"
-	TypeNoteUpdated  = "note_updated"
-	TypeFileAdded    = "file_added"
-	TypeFileDeleted  = "file_deleted"
-	TypeFileRenamed  = "file_renamed"
-	TypeFileCopied   = "file_copied"
-	TypeFileMoved    = "file_moved"
-	TypeFolderAdded  = "folder_added"
-	TypeFolderDeleted = "folder_deleted"
-	TypeFolderRenamed = "folder_renamed"
-	TypeNodeCreated  = "node_created"
-	TypeNodeUpdated  = "node_updated"
+	TypeNoteCreated    = "note_created"
+	TypeNoteUpdated    = "note_updated"
+	TypeFileAdded      = "file_added"
+	TypeFileDeleted    = "file_deleted"
+	TypeFileRenamed    = "file_renamed"
+	TypeFileCopied     = "file_copied"
+	TypeFileMoved      = "file_moved"
+	TypeFolderAdded    = "folder_added"
+	TypeFolderDeleted  = "folder_deleted"
+	TypeFolderRenamed  = "folder_renamed"
+	TypeNodeCreated    = "node_created"
+	TypeNodeUpdated    = "node_updated"
+	TypeActionCreated  = "action_created"
+	TypeActionDone     = "action_done"
+	TypeWorklogAdded   = "worklog_added"
+)
+
+// Target types.
+const (
+	TargetNote   = "note"
+	TargetFile   = "file"
+	TargetFolder = "folder"
+	TargetAction = "action"
+	TargetNode   = "node"
+	TargetWorklog = "worklog"
 )
 
 // Event represents an activity event.
 type Event struct {
-	ID        string `json:"id"`
-	NodeID    string `json:"node_id"`
-	ParentID  string `json:"parent_id,omitempty"`
-	EventType string `json:"event_type"`
-	Title     string `json:"title"`
-	Metadata  string `json:"metadata"`
-	CreatedAt string `json:"created_at"`
+	ID          string `json:"id"`
+	NodeID      string `json:"node_id"`
+	EventType   string `json:"event_type"`
+	TargetType  string `json:"target_type,omitempty"`
+	TargetID    string `json:"target_id,omitempty"`
+	TargetPath  string `json:"target_path,omitempty"`
+	Title       string `json:"title"`
+	DetailsJSON string `json:"details_json,omitempty"`
+	CreatedAt   string `json:"created_at"`
 }
 
 // Service records and queries activity events.
@@ -44,27 +60,16 @@ func NewService(db *storage.DB) *Service {
 }
 
 // Record inserts a new activity event.
-func (s *Service) Record(nodeID, parentID, eventType, title, metadata string) error {
+func (s *Service) Record(nodeID, targetType, targetID, targetPath, eventType, title, detailsJSON string) error {
 	id := util.UUID7()
 	now := time.Now().UTC().Format(time.RFC3339)
-	if metadata == "" {
-		metadata = "{}"
-	}
-	if parentID != "" {
-		_, err := s.db.Exec(
-			`INSERT INTO activity_events(id,node_id,parent_id,event_type,title,metadata,created_at)
-			 VALUES(?,?,?,?,?,?,?)`,
-			id, nodeID, parentID, eventType, title, metadata, now)
-		return err
-	}
 	_, err := s.db.Exec(
-		`INSERT INTO activity_events(id,node_id,event_type,title,metadata,created_at)
-		 VALUES(?,?,?,?,?,?)`,
-		id, nodeID, eventType, title, metadata, now)
+		`INSERT INTO activity_events(id,node_id,event_type,target_type,target_id,target_path,title,metadata,created_at)
+		 VALUES(?,?,?,?,?,?,?,?,?)`,
+		id, nodeID, eventType, targetType, targetID, targetPath, title, detailsJSON, now)
 	return err
 }
 
-// todayBoundaries returns the current local day in UTC.
 // TodayBoundaries returns the current local day in UTC as RFC3339 strings.
 func TodayBoundaries() (string, string) {
 	now := time.Now()
@@ -74,11 +79,21 @@ func TodayBoundaries() (string, string) {
 	return start.UTC().Format(time.RFC3339), end.UTC().Format(time.RFC3339)
 }
 
+// scanEvent scans a single event row.
+func scanEvent(rows *sql.Rows) (Event, error) {
+	var e Event
+	err := rows.Scan(&e.ID, &e.NodeID, &e.EventType,
+		&e.TargetType, &e.TargetID, &e.TargetPath,
+		&e.Title, &e.DetailsJSON, &e.CreatedAt)
+	return e, err
+}
+
 // ListTodayEvents returns all activity events from today.
 func (s *Service) ListTodayEvents() ([]Event, error) {
 	start, end := TodayBoundaries()
 	rows, err := s.db.Query(
-		`SELECT id,node_id,COALESCE(parent_id,''),event_type,title,metadata,created_at
+		`SELECT id,node_id,event_type,COALESCE(target_type,''),COALESCE(target_id,''),COALESCE(target_path,''),
+		       title,COALESCE(metadata,'{}'),created_at
 		 FROM activity_events
 		 WHERE created_at >= ? AND created_at < ?
 		 ORDER BY created_at DESC`, start, end)
@@ -88,8 +103,8 @@ func (s *Service) ListTodayEvents() ([]Event, error) {
 	defer rows.Close()
 	var events []Event
 	for rows.Next() {
-		var e Event
-		if err := rows.Scan(&e.ID, &e.NodeID, &e.ParentID, &e.EventType, &e.Title, &e.Metadata, &e.CreatedAt); err != nil {
+		e, err := scanEvent(rows)
+		if err != nil {
 			return nil, err
 		}
 		events = append(events, e)
@@ -97,7 +112,7 @@ func (s *Service) ListTodayEvents() ([]Event, error) {
 	return events, rows.Err()
 }
 
-// ListTodayEventsByParent returns activity events grouped by parent node.
+// ListTodayEventsByParent returns today's events grouped by their NodeID.
 func (s *Service) ListTodayEventsByParent() (map[string][]Event, error) {
 	events, err := s.ListTodayEvents()
 	if err != nil {
@@ -105,12 +120,63 @@ func (s *Service) ListTodayEventsByParent() (map[string][]Event, error) {
 	}
 	grouped := make(map[string][]Event, 8)
 	for _, e := range events {
-		pid := e.ParentID
-		if pid == "" {
-			pid = e.NodeID
-		}
+		pid := e.NodeID
 		grouped[pid] = append(grouped[pid], e)
 	}
 	return grouped, nil
 }
 
+// ListRecent returns a paginated global activity feed.
+func (s *Service) ListRecent(limit, offset int) ([]Event, error) {
+	rows, err := s.db.Query(
+		`SELECT id,node_id,event_type,COALESCE(target_type,''),COALESCE(target_id,''),COALESCE(target_path,''),
+		       title,COALESCE(metadata,'{}'),created_at
+		 FROM activity_events
+		 ORDER BY created_at DESC
+		 LIMIT ? OFFSET ?`, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var events []Event
+	for rows.Next() {
+		e, err := scanEvent(rows)
+		if err != nil {
+			return nil, err
+		}
+		events = append(events, e)
+	}
+	return events, rows.Err()
+}
+
+// ListByNode returns paginated events for a specific node.
+func (s *Service) ListByNode(nodeID string, limit, offset int) ([]Event, error) {
+	rows, err := s.db.Query(
+		`SELECT id,node_id,event_type,COALESCE(target_type,''),COALESCE(target_id,''),COALESCE(target_path,''),
+		       title,COALESCE(metadata,'{}'),created_at
+		 FROM activity_events
+		 WHERE node_id = ?
+		 ORDER BY created_at DESC
+		 LIMIT ? OFFSET ?`, nodeID, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var events []Event
+	for rows.Next() {
+		e, err := scanEvent(rows)
+		if err != nil {
+			return nil, err
+		}
+		events = append(events, e)
+	}
+	return events, rows.Err()
+}
+
+// CountByNode returns the total number of events for a node.
+func (s *Service) CountByNode(nodeID string) (int, error) {
+	var count int
+	err := s.db.QueryRow(
+		`SELECT COUNT(*) FROM activity_events WHERE node_id = ?`, nodeID).Scan(&count)
+	return count, err
+}

internal/core/nodes/types.go

@@ -47,8 +47,9 @@ var validSections = map[string]struct{}{
 
 // serviceSections are sidebar entries that are not stored as node sections.
 var serviceSections = map[string]struct{}{
-	"today": {},
-	"inbox": {},
+	"today":    {},
+	"inbox":    {},
+	"activity": {},
 }
 
 // IsValidType checks whether a type string is recognized.

internal/core/storage/migrations_009.sql.go

@@ -0,0 +1,8 @@
+package storage
+
+// migration009 — add target_type, target_id, target_path to activity_events.
+const migration009 = `
+ALTER TABLE activity_events ADD COLUMN target_type TEXT;
+ALTER TABLE activity_events ADD COLUMN target_id TEXT;
+ALTER TABLE activity_events ADD COLUMN target_path TEXT;
+`

internal/core/storage/storage.go

@@ -65,6 +65,7 @@ var migrationFiles = map[int]string{
 	6: migration006,
 	// 7: migration007 (FTS5) — created lazily by search.Rebuild()
 	8: migration008,
+	9: migration009,
 }
 
 func (db *DB) runInitialSchema() error {