feat: ship v0.6.0 with cockpit, knowledge base, and chapter bridge

Deliver P5 writer workflow: writing cockpit, manual knowledge CRUD with review, chapter bridge with optional AI, publish status, and stock buffer reminders.

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

tests/main/migrate-v6.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect, afterEach } from 'vitest'
+import { DatabaseSync } from 'node:sqlite'
+import { migrate } from '../../src/main/db/migrate'
+import type { SqliteDb } from '../../src/main/db/types'
+
+describe('migrate v6', () => {
+  let db: SqliteDb
+  afterEach(() => db?.close())
+
+  it('UT-MIG-06: applies v6 on fresh database', () => {
+    db = new DatabaseSync(':memory:')
+    migrate(db)
+    const version = db.prepare('SELECT MAX(version) AS v FROM schema_version').get() as { v: number }
+    expect(version.v).toBe(6)
+    const tables = db
+      .prepare("SELECT name FROM sqlite_master WHERE type='table'")
+      .all() as { name: string }[]
+    expect(tables.some((t) => t.name === 'knowledge_entries')).toBe(true)
+    expect(tables.some((t) => t.name === 'book_preferences')).toBe(true)
+    expect(tables.some((t) => t.name === 'chapter_bridge_dismiss')).toBe(true)
+  })
+})