test(e2e): refresh Google client-setup screenshot (Task 2 evidence)

Regenerated after the BYO Google setup copy fix. The modal now shows: cross-platform
credential-store copy (Keychain on macOS / Credential Manager on Windows), the new
'Configure the OAuth consent screen' step naming the app 'Off Grid AI Desktop' (the
'News flash' fix), and the create-client step reordered after it. Content is guarded
by the GoogleClientSetup integration test in desktop-pro; this is the visual evidence.

Author: alichherawalla