Add native cutting plan page

src/analytics/cutting.test.ts

@@ -0,0 +1,64 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { buildCutPlan, classifyCutFamily } from './cutting.ts';
+import type { DateRange, ProductAnalyticsItem } from '../types.ts';
+
+const range: DateRange = {
+  start: new Date(2026, 6, 1),
+  end: new Date(2026, 6, 7)
+};
+
+const product = (overrides: Partial<ProductAnalyticsItem>): ProductAnalyticsItem => ({
+  id: 'SKU-1',
+  name: 'BASE LISA CAMISETA COR PRETO TAMANHO - M',
+  quantitySold: 70,
+  revenue: 700,
+  orderLineCount: 10,
+  lastPrice: 10,
+  stock: 20,
+  firstSaleDate: '2026-07-01',
+  lastSaleDate: '2026-07-07',
+  ...overrides
+});
+
+test('classifyCutFamily maps known product bases to internal cut families', () => {
+  assert.equal(classifyCutFamily('BASE LISA CAMISETA').key, 'BLCS');
+  assert.equal(classifyCutFamily('BASE LISA CAMISETA OVER').key, 'BLOS');
+  assert.equal(classifyCutFamily('BASE LISA MOLETOM CANGURU').key, 'BLPM');
+  assert.equal(classifyCutFamily('BONÉ').key, 'OUTROS');
+});
+
+test('buildCutPlan calculates projected cut need from sales pace and stock', () => {
+  const plan = buildCutPlan([product({})], range, 14);
+  const [row] = plan.needRows;
+
+  assert.equal(row.dailySales, 10);
+  assert.equal(row.projectedDemand, 140);
+  assert.equal(row.availableQuantity, 20);
+  assert.equal(row.suggestedCutQuantity, 120);
+  assert.equal(plan.summary.suggestedCutQuantity, 120);
+});
+
+test('buildCutPlan subtracts open production quantity from suggested cut need', () => {
+  const plan = buildCutPlan([product({ id: 'SKU-1' })], range, 14, { 'SKU-1': 100 });
+  const [row] = plan.needRows;
+
+  assert.equal(row.availableQuantity, 120);
+  assert.equal(row.suggestedCutQuantity, 20);
+});
+
+test('buildCutPlan marks products that cannot be planned cleanly for cutting', () => {
+  const plan = buildCutPlan([
+    product({
+      id: 'SKU-2',
+      name: 'BONÉ PRETO',
+      quantitySold: 70,
+      stock: 0
+    })
+  ], range, 7);
+
+  assert.equal(plan.needRows[0].family.key, 'OUTROS');
+  assert.deepEqual(plan.needRows[0].issues, ['missing_family_rule', 'missing_color', 'missing_size']);
+  assert.equal(plan.summary.rowsWithIssues, 1);
+});