feat(referral-network): кнопка построения полной реферальной сети

Со времён редизайна со скоуп-селектором граф строится только для
выбранных кампаний, партнёров или пользователей, и посмотреть сеть
целиком стало нечем. Бэкенд для этого уже есть — GET /cabinet/admin/
referral-network/ отдаёт полный граф и остался неиспользуемым после
того, как фронт перешёл на /scoped.

Возвращаем к нему доступ: в дропдауне селектора появляется закреплённый
пункт «Вся сеть», который грузит граф целиком. Режим взаимоисключающий
с выбором чипов — полный граф и так содержит все сущности.

src/store/referralNetwork.test.ts

@@ -0,0 +1,105 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+import { MAX_SCOPE_ITEMS, useReferralNetworkStore } from './referralNetwork';
+import type { ScopeSelection } from '@/types/referralNetwork';
+
+const INITIAL_STATE = useReferralNetworkStore.getState();
+
+function campaign(id: number): ScopeSelection {
+  return { type: 'campaign', id, label: `Campaign ${id}` };
+}
+
+describe('referralNetwork store', () => {
+  beforeEach(() => {
+    useReferralNetworkStore.setState(INITIAL_STATE, true);
+  });
+
+  it('starts with no scope and full network off', () => {
+    const state = useReferralNetworkStore.getState();
+    expect(state.scope).toEqual([]);
+    expect(state.isFullNetwork).toBe(false);
+  });
+
+  it('drops the selected scope when full network is enabled', () => {
+    const { addScope, setFullNetwork } = useReferralNetworkStore.getState();
+    addScope(campaign(1));
+    addScope(campaign(2));
+
+    setFullNetwork(true);
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.isFullNetwork).toBe(true);
+    expect(state.scope).toEqual([]);
+  });
+
+  it('leaves full network mode when a scope item is added', () => {
+    const { setFullNetwork, addScope } = useReferralNetworkStore.getState();
+    setFullNetwork(true);
+
+    addScope(campaign(1));
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.isFullNetwork).toBe(false);
+    expect(state.scope).toEqual([campaign(1)]);
+  });
+
+  it('resets the graph selection when switching to full network', () => {
+    const { setSelectedNode, setHighlightedNodes, setFullNetwork } =
+      useReferralNetworkStore.getState();
+    setSelectedNode({ type: 'user', id: 7 });
+    setHighlightedNodes(new Set(['user_7']));
+
+    setFullNetwork(true);
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.selectedNode).toBeNull();
+    expect(state.highlightedNodes.size).toBe(0);
+  });
+
+  it('turns full network off without leaving a stale scope', () => {
+    const { setFullNetwork } = useReferralNetworkStore.getState();
+    setFullNetwork(true);
+
+    setFullNetwork(false);
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.isFullNetwork).toBe(false);
+    expect(state.scope).toEqual([]);
+  });
+
+  it('clears both the scope and full network mode', () => {
+    const { setFullNetwork, clearScope } = useReferralNetworkStore.getState();
+    setFullNetwork(true);
+
+    clearScope();
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.isFullNetwork).toBe(false);
+    expect(state.scope).toEqual([]);
+  });
+
+  it('ignores duplicate scope items and keeps full network off', () => {
+    const { addScope } = useReferralNetworkStore.getState();
+    addScope(campaign(1));
+    addScope(campaign(1));
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.scope).toEqual([campaign(1)]);
+    expect(state.isFullNetwork).toBe(false);
+  });
+
+  it('does not exit full network mode when the scope is already full', () => {
+    const { addScope, setFullNetwork } = useReferralNetworkStore.getState();
+    for (let id = 1; id <= MAX_SCOPE_ITEMS; id++) {
+      addScope(campaign(id));
+    }
+    setFullNetwork(true);
+
+    // The cap is per-scope; with the scope dropped by full-network mode there is
+    // nothing to reject, so this add must switch the mode off and take effect.
+    addScope(campaign(999));
+
+    const state = useReferralNetworkStore.getState();
+    expect(state.isFullNetwork).toBe(false);
+    expect(state.scope).toEqual([campaign(999)]);
+  });
+});