Contrat IPC typé, stockage JSON atomique, journal fichier et validation des entrées

tests/validate.test.ts

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+import { describe, expect, it } from 'vitest'
+import { gamePatch, InvalidInput, settingsPatch } from '../src/main/validate'
+
+describe('validation IPC', () => {
+  it('ignore les champs inconnus', () => {
+    expect(settingsPatch({ volume: 0.5, evil: 1 })).toEqual({ volume: 0.5 })
+  })
+  it('refuse les mauvais types', () => {
+    expect(() => settingsPatch({ volume: 3 })).toThrow(InvalidInput)
+    expect(() => settingsPatch({ language: 'de' })).toThrow(InvalidInput)
+    expect(() => gamePatch({ name: 'x'.repeat(500) })).toThrow(InvalidInput)
+  })
+  it('remplace un nom vide', () => {
+    expect(gamePatch({ name: '  ' }).name).toBe('Sans nom')
+  })
+})