Rework story engine flow and reorganize project docs

src/services/storyEngine/epilogueComposer.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from 'vitest';
+
+import { buildEpilogueSummary } from './epilogueComposer';
+
+describe('epilogueComposer', () => {
+  it('composes an epilogue from ending and companion resolutions', () => {
+    const summary = buildEpilogueSummary({
+      endingState: {
+        id: 'ending-1',
+        title: '守住火种',
+        endingType: 'heroic',
+        summary: '你把局势拖回了可继续前行的方向。',
+        contributingThreadIds: ['thread-1'],
+        companionResolutions: [],
+        worldOutcomeSummary: '边城暂时稳了下来。',
+      },
+      companionResolutions: [
+        {
+          characterId: 'archer-hero',
+          resolutionType: 'bonded',
+          summary: '她最终选择与你并肩到底。',
+          relatedThreadIds: ['thread-1'],
+        },
+      ],
+    });
+
+    expect(summary).toContain('守住火种');
+    expect(summary).toContain('并肩到底');
+  });
+});