Make New-in label dynamic via GitHub API

Dynamic version: fetch latest release tag from GitHub API on page load

Redesign: modern dark UI, glassmorphism cards, fix all external links

Add screenshot 06-general-settings.png

Add screenshot 05-model-settings.png

Add screenshot 04-model-manager.png

Add screenshot 03-onboarding-prereqs.png

Add screenshot 02-streaming-response.png

Add screenshot 01-hero-chat.png

Add icon

Add landing page

initial commit