refactor: split validation handler responsibilities

tests/unit/shared-production-ids-store.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import { SharedProductionIdsStore } from '../../src/main/services/validation/shared-production-ids-store'
+
+describe('SharedProductionIdsStore', () => {
+  it('stores unique ids per sender', () => {
+    const store = new SharedProductionIdsStore()
+
+    store.set(1, ['A', 'B', 'A'])
+
+    expect(store.get(1)).toEqual(['A', 'B'])
+  })
+
+  it('keeps sender scopes isolated', () => {
+    const store = new SharedProductionIdsStore()
+
+    store.set(1, ['A'])
+    store.set(2, ['B'])
+
+    expect(store.get(1)).toEqual(['A'])
+    expect(store.get(2)).toEqual(['B'])
+  })
+
+  it('clears sender data', () => {
+    const store = new SharedProductionIdsStore()
+
+    store.set(1, ['A'])
+    store.clear(1)
+
+    expect(store.get(1)).toEqual([])
+  })
+})