style: overhaul UI visual identity to Quantum Indigo-Mint with sleek Space Grotesk/Outfit typography and premium layout card transitions

feat: design dedicated spacious API environment card with active pulsing indicator dots and toast notifications

Set default backend URL to live Hugging Face Space endpoint for seamless out-of-the-box Vercel connection

SupportOps v2 UI Overhaul: Fix overlay box bug, add animated side-by-side replay player, SVG radar & ROI line charts, interactive popover heatmaps, and research hub

Enrich UI with Interactive ROI Calculator, Model Capabilities Breakdown, MDP Spec Tab, and Sandbox Trajectory Simulation Demos

Configure frontend for Vercel deployment & dynamic HF backend integration