fix(pagestream): fix initial focus, card borders, duplicates, and page loading
- Start with most recent history card focused instead of auto-focusing navbar URL input
- Remove blue outline/border on active/focused/hovered cards by overriding peek-card
shadow DOM styles via ::part(card) selectors
- Deduplicate consecutive history entries with the same URL in getFilteredVisits()
- Replace broken webview-based inline browsing with api.window.open() — extension
windows don't have webviewTag enabled in webPreferences, so pages were blank white;
now URLs open in proper page windows with full canvas + webview support
- Remove unused browse-overlay CSS