first commit

Co-Authored-By: Codex <noreply@openai.com>

service/context.go

@@ -0,0 +1,18 @@
+package service
+
+import (
+	"context"
+
+	"github.com/basketikun/infinite-canvas/model"
+)
+
+type userContextKey struct{}
+
+func WithUser(ctx context.Context, user model.AuthUser) context.Context {
+	return context.WithValue(ctx, userContextKey{}, user)
+}
+
+func UserFromContext(ctx context.Context) (model.AuthUser, bool) {
+	user, ok := ctx.Value(userContextKey{}).(model.AuthUser)
+	return user, ok
+}