Better onboarding, SEO, and landing page polish

We refined the landing experience with cleaner fonts, improved banner presentation, and broader SEO updates. We also made agent onboarding smoother so agents can start running right away, even before brand voice is configured.

• Smoothed out the agent onboarding flow for a better first-time experience
• Updated landing page fonts for a cleaner, more polished look
• Improved SEO and banner presentation to strengthen discoverability and visual clarity