feat: add supervisor prototype with embedded frontend

internal/store/memory/store.go

@@ -0,0 +1,51 @@
+package memory
+
+import (
+	"context"
+	"sort"
+	"supervisor/internal/domain"
+	"sync"
+)
+
+type Store struct {
+	mu       sync.RWMutex
+	sessions map[string]domain.Session
+}
+
+func NewStore() *Store {
+	return &Store{sessions: make(map[string]domain.Session)}
+}
+
+func (s *Store) Upsert(_ context.Context, session domain.Session) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.sessions[session.ID] = session
+	return nil
+}
+
+func (s *Store) Get(_ context.Context, id string) (domain.Session, bool, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	session, ok := s.sessions[id]
+	return session, ok, nil
+}
+
+func (s *Store) List(_ context.Context) ([]domain.Session, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	items := make([]domain.Session, 0, len(s.sessions))
+	for _, session := range s.sessions {
+		items = append(items, session)
+	}
+	sort.Slice(items, func(i, j int) bool {
+		return items[i].CreatedAt.After(items[j].CreatedAt)
+	})
+	return items, nil
+}
+
+func (s *Store) Delete(_ context.Context, id string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	delete(s.sessions, id)
+	return nil
+}