feat: ship v1.0.0 with character graph and writing analytics

Add P7 Cytoscape relationship graph with setting CRUD, P9 cockpit analytics driven by writing_sessions, chapter POV selection, and full test coverage.

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

tests/main/writing-session.test.ts

@@ -0,0 +1,79 @@
+import { describe, it, expect, afterEach, vi, beforeEach } from 'vitest'
+import { randomUUID } from 'crypto'
+import { DatabaseSync } from 'node:sqlite'
+import { mkdtempSync, rmSync } from 'fs'
+import { join } from 'path'
+import { tmpdir } from 'os'
+import { WritingLogRepository } from '../../src/main/db/repositories/writing-log.repo'
+import { WritingSessionRepository } from '../../src/main/db/repositories/writing-session.repo'
+import { WritingSessionService } from '../../src/main/services/writing-session.service'
+
+describe('WritingSessionRepository', () => {
+  let userDir: string
+  let logRepo: WritingLogRepository
+  let repo: WritingSessionRepository
+
+  afterEach(() => {
+    logRepo?.close()
+    if (userDir) rmSync(userDir, { recursive: true, force: true })
+  })
+
+  it('UT-SESSION-03: insert and updateActivity accumulates word_delta', () => {
+    userDir = mkdtempSync(join(tmpdir(), 'bilin-session-'))
+    logRepo = new WritingLogRepository(userDir)
+    repo = new WritingSessionRepository(logRepo.getDb())
+    const id = randomUUID()
+    repo.insert({
+      id,
+      bookId: 'b1',
+      chapterId: 'c1',
+      startedAt: '2026-07-08T10:00:00.000Z',
+      endedAt: '2026-07-08T10:05:00.000Z',
+      wordDelta: 50,
+      date: '2026-07-08'
+    })
+    repo.updateActivity(id, '2026-07-08T10:10:00.000Z', 30)
+    expect(repo.getById(id)!.wordDelta).toBe(80)
+  })
+})
+
+describe('WritingSessionService', () => {
+  let userDir: string
+  let logRepo: WritingLogRepository
+  let repo: WritingSessionRepository
+  let service: WritingSessionService
+
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date('2026-07-08T10:00:00.000Z'))
+    userDir = mkdtempSync(join(tmpdir(), 'bilin-session-svc-'))
+    logRepo = new WritingLogRepository(userDir)
+    repo = new WritingSessionRepository(logRepo.getDb())
+    service = new WritingSessionService(repo)
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+    logRepo?.close()
+    if (userDir) rmSync(userDir, { recursive: true, force: true })
+  })
+
+  it('UT-SESSION-01: within 5min merges into one session', () => {
+    service.recordActivity('b1', 'c1', 50)
+    vi.advanceTimersByTime(2 * 60 * 1000)
+    service.recordActivity('b1', 'c1', 30)
+    const rows = repo.listForBookDate('b1', '2026-07-08')
+    expect(rows).toHaveLength(1)
+    expect(rows[0].wordDelta).toBe(80)
+  })
+
+  it('UT-SESSION-02: after 6min creates two sessions', () => {
+    service.recordActivity('b1', 'c1', 50)
+    vi.advanceTimersByTime(6 * 60 * 1000)
+    service.recordActivity('b1', 'c1', 30)
+    const rows = repo.listForBookDate('b1', '2026-07-08')
+    expect(rows).toHaveLength(2)
+    expect(rows[0].wordDelta).toBe(50)
+    expect(rows[1].wordDelta).toBe(30)
+  })
+})