docs: add PR #310 auth flow screenshots and recordings

Captured Playwright media for login, signup, password reset, and accept-invitation states on branch review.

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

Author: jlouisugbo

.gitignore

@@ -46,6 +46,7 @@ next-env.d.ts
 
 # Playwright
 /test-results/
+/docs/pr-310/test-results/
 /playwright-report/
 /blob-report/
 /playwright/.cache/