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/cockpit-knowledge.spec.ts

@@ -27,9 +27,12 @@ async function skipOnboarding(page: Page): Promise<void> {
 
 async function dismissCockpitIfOpen(page: Page): Promise<void> {
   const cockpit = page.locator('[data-testid="cockpit-modal"]')
-  if (await cockpit.isVisible({ timeout: 3000 }).catch(() => false)) {
-    await page.locator('[data-testid="cockpit-modal"] .modal-close').click()
+  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 */
   }
 }