Architecture and package boundaries

Goal: keep Core deterministic and framework‑agnostic, and keep the Vue layer a thin adapter.

1) Responsibility boundaries

Package	Owns	Must not own
@affino/datagrid-core	модели, runtime‑signals, viewport/virtualization, selection geometry	Vue refs, SFC‑рендер, adapter‑lifecycle
@affino/datagrid-vue	composables, UI‑адаптер, lifecycle, интеграция	дублирование геометрии/virtualization

2) Dependency direction

• datagrid-core does not depend on Vue.
• datagrid-vue depends on datagrid-core.

3) Canonical runtime pipeline

1. Input events reach the adapter.
2. The adapter normalizes into core contracts.
3. Core computes viewport/virtualization.
4. Core emits deterministic geometry.
5. The Vue layer renders only.

4) Invariants

• Single owner for scroll sync.
• Canonical pin = left | right | none.
• One coordinate system (world/viewport/client).