mail domain:发信校验与选账号(from 不静默回落)、分发状态机、账号记录与视图(密文进不了视图)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TM4kUBvekALu9qqmp7D3wr

apps/api/src/modules/mail/__tests__/delivery.test.ts

@@ -0,0 +1,17 @@
+/** 分发状态机:dispatching 不能被重投;回调回 skipped 就是 skipped */
+import { describe, expect, it } from 'vitest';
+import { canRedeliver, stateOfOutcome } from '../internal/domain/delivery.ts';
+
+describe('delivery', () => {
+  it('从没投过 / done / failed / skipped 都能重投;正在投的不能', () => {
+    expect(canRedeliver(undefined)).toBe(true);
+    expect(canRedeliver('done')).toBe(true);
+    expect(canRedeliver('failed')).toBe(true);
+    expect(canRedeliver('skipped')).toBe(true);
+    expect(canRedeliver('dispatching')).toBe(false);
+  });
+  it('回调的返回值定状态', () => {
+    expect(stateOfOutcome(undefined)).toBe('done');
+    expect(stateOfOutcome({ skipped: '账号未绑定通道' })).toBe('skipped');
+  });
+});