feat: deliver P2 v0.2.0 with unified editor, search, and snapshots

Implement schema v2 migration, outline/setting/inspiration CRUD, unified TipTap editing, reference panel with mentions, FTS global search, chapter version history, writing landmarks, word frequency analysis, light theme contrast fixes, and full unit/E2E test coverage.

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

tests/main/search.service.test.ts

@@ -0,0 +1,46 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest'
+import { DatabaseSync } from 'node:sqlite'
+import { migrate } from '../../src/main/db/migrate'
+import { VolumeRepository } from '../../src/main/db/repositories/volume.repo'
+import { ChapterRepository } from '../../src/main/db/repositories/chapter.repo'
+import { ftsSync } from '../../src/main/services/fts-sync.service'
+import { searchService } from '../../src/main/services/search.service'
+import type { SqliteDb } from '../../src/main/db/types'
+
+describe('SearchService', () => {
+  let db: SqliteDb
+
+  beforeEach(() => {
+    db = new DatabaseSync(':memory:')
+    migrate(db)
+    const vol = new VolumeRepository(db).create('卷一', 0)
+    const ch = new ChapterRepository(db).create(vol.id, '第一章', 0, '林远走进青云山')
+    ftsSync.upsert(db, 'chapter', ch.id, ch.title, ch.content)
+  })
+
+  afterEach(() => {
+    db.close()
+  })
+
+  it('finds chapter by FTS query', () => {
+    const results = searchService.query(db, { text: '青云山' })
+    expect(results.length).toBeGreaterThanOrEqual(1)
+    expect(results[0].kind).toBe('chapter')
+    expect(results[0].snippet).toContain('青云')
+  })
+
+  it('returns dry-run replace preview', () => {
+    const { count, previews } = searchService.replace(db, {
+      text: '林远',
+      replacement: '李明',
+      dryRun: true
+    })
+    expect(count).toBeGreaterThanOrEqual(1)
+    expect(previews.length).toBeGreaterThanOrEqual(1)
+  })
+
+  it('supports regex fallback search', () => {
+    const results = searchService.query(db, { text: '林.+山', regex: true })
+    expect(results.length).toBeGreaterThanOrEqual(1)
+  })
+})