feat: ship v1.1.0 writer toolkit with templates, import, export, and inspiration capture

Implement chapter templates, txt/md/docx import, submission export presets, and global inspiration shortcut. Split import handlers into a separate main bundle and fix EditorLayout setTarget loop that broke E2E.

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

e2e/export-submission.spec.ts

@@ -0,0 +1,50 @@
+import { mkdtempSync, rmSync, existsSync } from 'fs'
+import { join } from 'path'
+import { tmpdir } from 'os'
+import { test, expect } from '@playwright/test'
+import {
+  launchApp,
+  skipOnboarding,
+  createBookAndOpenEditor,
+  ensureChapterEditor,
+  openExportModal
+} from './helpers'
+
+test.describe('Export submission', () => {
+  let userDataDir: string
+
+  test.beforeEach(() => {
+    userDataDir = mkdtempSync(join(tmpdir(), 'bilin-e2e-export-'))
+  })
+
+  test.afterEach(() => {
+    if (userDataDir && existsSync(userDataDir)) {
+      try {
+        rmSync(userDataDir, { recursive: true, force: true, maxRetries: 3, retryDelay: 200 })
+      } catch {
+        /* ignore */
+      }
+    }
+  })
+
+  test('E2E-EXPORT-01: copy submission format includes chapter heading', async () => {
+    const app = await launchApp(userDataDir)
+    const page = await app.firstWindow()
+    await skipOnboarding(page)
+    await createBookAndOpenEditor(page, '导出测试书')
+    await ensureChapterEditor(page)
+
+    const editor = page.locator('.ProseMirror')
+    await editor.click()
+    await editor.pressSequentially('这是投稿导出测试正文。')
+    await page.keyboard.press('Control+S')
+    await expect(page.getByText('已保存')).toBeVisible({ timeout: 10_000 })
+
+    await openExportModal(page)
+    await expect(page.getByTestId('export-preview')).toContainText(/# 第\d+章/, { timeout: 10_000 })
+    await page.getByTestId('export-copy-clipboard').click()
+    await expect(page.getByText('已复制到剪贴板')).toBeVisible({ timeout: 10_000 })
+
+    await app.close()
+  })
+})