refactor(ipc): harden channels and unify IPC contracts

tests/unit/ipc-index.test.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from 'vitest'
+import { withErrorHandling } from '../../src/main/ipc'
+import { ValidationError } from '../../src/main/types/errors'
+
+describe('IPC Result Wrapper', () => {
+  it('wraps successful values into IpcResult.data', async () => {
+    const result = await withErrorHandling(async () => ({ value: 42 }), 'test:success')
+    expect(result.success).toBe(true)
+    expect(result.data).toEqual({ value: 42 })
+  })
+
+  it('wraps exceptions into IpcResult.error/code', async () => {
+    const result = await withErrorHandling(async () => {
+      throw new ValidationError('Invalid input', 'VAL_INVALID_INPUT')
+    }, 'test:failure')
+
+    expect(result.success).toBe(false)
+    expect(result.error).toBe('Invalid input')
+    expect(result.code).toBe('VAL_INVALID_INPUT')
+  })
+})