feat: scaffold codespace backend

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

internal/service/workspace_service.go

@@ -0,0 +1,36 @@
+package service
+
+import (
+	"codespace/internal/process"
+	"codespace/internal/workspace"
+)
+
+// WorkspaceService orchestrates workspace lifecycle operations.
+type WorkspaceService struct {
+	workspaces workspace.Manager
+	processes  process.Manager
+}
+
+// NewWorkspaceService creates a WorkspaceService.
+func NewWorkspaceService(workspaces workspace.Manager, processes process.Manager) *WorkspaceService {
+	return &WorkspaceService{workspaces: workspaces, processes: processes}
+}
+
+// Create creates a new workspace.
+func (s *WorkspaceService) Create(id string) (*workspace.Workspace, error) {
+	return s.workspaces.Create(id)
+}
+
+// Get retrieves a workspace by id.
+func (s *WorkspaceService) Get(id string) (*workspace.Workspace, error) {
+	return s.workspaces.Get(id)
+}
+
+// Delete stops any running process for the workspace, then removes it.
+func (s *WorkspaceService) Delete(id string) error {
+	status := s.processes.Status(id)
+	if status.Running {
+		_ = s.processes.Stop(id)
+	}
+	return s.workspaces.Delete(id)
+}