fix(test): stabilize E2E cockpit flow and add LM Studio novel integration test

Harden cockpit dismiss timing and global settings navigation in E2E helpers, tune short-chapter AI prompts for local models, fix electron-updater CJS loading, and add a 10-chapter auto-writing integration test against LM Studio.

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

e2e/writing.spec.ts

@@ -25,11 +25,23 @@ async function skipOnboarding(page: Page): Promise<void> {
   await expect(page.getByText('欢迎使用笔临')).toBeHidden({ timeout: 10_000 })
 }
 
+async function dismissCockpitIfOpen(page: Page): Promise<void> {
+  const cockpit = page.locator('[data-testid="cockpit-modal"]')
+  try {
+    await cockpit.waitFor({ state: 'visible', timeout: 15_000 })
+    await cockpit.locator('.modal-close').click()
+    await expect(cockpit).toBeHidden({ timeout: 5000 })
+  } catch {
+    /* cockpit did not open */
+  }
+}
+
 async function createAndOpenBook(page: Page, name: string): Promise<void> {
   await page.getByRole('button', { name: /新建书籍/ }).first().click()
   await page.locator('.dialog-content input').first().fill(name)
   await page.getByRole('button', { name: '创建' }).click()
   await expect(page.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
+  await dismissCockpitIfOpen(page)
 }
 
 test.describe('Writing', () => {
@@ -54,6 +66,7 @@ test.describe('Writing', () => {
     const page1 = await app1.firstWindow()
     await skipOnboarding(page1)
     await createAndOpenBook(page1, '测试书')
+    await dismissCockpitIfOpen(page1)
     await page1.getByRole('button', { name: '+ 新章' }).click()
 
     const editor = page1.locator('.ProseMirror')