test: fix and run visual regression screenshot suite for all 12 pages
Fixed splash screen blocking login (set localStorage before navigation),
replaced full page reloads with in-page pushState navigation to preserve
SPA session, added page-specific content waits for reliable screenshots.
Increased Playwright timeout to 60s. Baseline screenshots captured for:
login, home, apps, marketplace, cloud, network, web5, settings, chat,
federation, credentials, system update.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
8e0b938dc0
