feat(w4): ship v1.5.0 timeline, character arc, and compliance

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main/services/arc.service.ts

@@ -0,0 +1,47 @@
+import type { CharacterArcNode } from '../../shared/arc'
+import { KnowledgeRepository } from '../db/repositories/knowledge.repo'
+import { SettingRepository } from '../db/repositories/setting.repo'
+import { ChapterRepository } from '../db/repositories/chapter.repo'
+import type { SqliteDb } from '../db/types'
+
+export class ArcService {
+  constructor(private db: SqliteDb) {}
+
+  getForCharacter(settingId: string): CharacterArcNode[] {
+    const setting = new SettingRepository(this.db).get(settingId)
+    if (!setting || setting.type !== 'character') return []
+
+    const knowledge = new KnowledgeRepository(this.db)
+      .list()
+      .filter((k) => k.type === 'character' && k.title.includes(setting.name))
+    const chapterRepo = new ChapterRepository(this.db)
+    const chapters = new Map(chapterRepo.list().map((c) => [c.id, c]))
+
+    const nodes: CharacterArcNode[] = knowledge
+      .map((k) => {
+        const chapterId = k.lastMentionChapterId ?? k.sourceChapterId
+        const chapter = chapterId ? chapters.get(chapterId) : undefined
+        return {
+          id: k.id,
+          title: k.title,
+          content: k.content,
+          chapterId: chapterId ?? null,
+          chapterTitle: chapter?.title ?? null,
+          updatedAt: k.updatedAt
+        }
+      })
+      .sort((a, b) => a.updatedAt.localeCompare(b.updatedAt))
+
+    if (nodes.length === 0 && setting.description.trim()) {
+      nodes.push({
+        id: `setting:${setting.id}`,
+        title: '角色设定',
+        content: setting.description.replace(/<[^>]+>/g, '').slice(0, 200),
+        chapterId: null,
+        chapterTitle: null,
+        updatedAt: setting.updatedAt
+      })
+    }
+    return nodes
+  }
+}