Fix cross-account candidate delivery

tests/reddit-account-runtime-builder.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it, vi } from 'vitest';
+import type { RedditPost } from '../src/reddit/api.js';
+import type { RedditAccountRuntimeResources } from '../src/services/reddit-account-runtime.js';
+import { materializePreparedPostForAccount } from '../src/services/reddit-account-runtime-builder.js';
+import type { ProcessedPost } from '../src/services/processor.js';
+
+describe('materializePreparedPostForAccount', () => {
+  it('creates the sending account post row before message persistence', () => {
+    const post: RedditPost = {
+      id: 'post-1', subreddit: 'test', author: 'alice', author_fullname: 't2_alice',
+      title: 'title', url: 'https://example.com/image.jpg', permalink: '/r/test/post-1',
+      thumbnail: '', is_self: false, created_utc: 123, over_18: true, spoiler: false,
+    };
+    const processed: ProcessedPost = {
+      post, imageAnalysis: 'analysis', detectedGender: 'female', generatedMessage: 'message',
+      strategyId: null, experimentId: null, promptVersion: null, selectionReason: null,
+      modelId: 'model', sourceType: 'image', toneId: 'default', scripted: false,
+    };
+    const insertIfAbsent = vi.fn();
+    const updateAnalysis = vi.fn();
+    const resources = {
+      postsRepo: { insertIfAbsent, updateAnalysis },
+      redditApi: {
+        getPostUrl: () => 'https://reddit.example/post-1',
+        getImageUrl: () => 'https://reddit.example/image.jpg',
+      },
+    } as unknown as Pick<RedditAccountRuntimeResources, 'postsRepo' | 'redditApi'>;
+
+    materializePreparedPostForAccount(resources, processed, 456);
+
+    expect(insertIfAbsent).toHaveBeenCalledWith({
+      id: 'post-1', subreddit: 'test', author: 'alice', title: 'title',
+      postUrl: 'https://reddit.example/post-1', imageUrl: 'https://reddit.example/image.jpg',
+      postCreatedAt: 123_000, processedAt: 456,
+    });
+    expect(updateAnalysis).toHaveBeenCalledWith('post-1', 'analysis', 'message');
+  });
+});